diff --git a/go.mod b/go.mod
index 24f445eb..2589e605 100644
--- a/go.mod
+++ b/go.mod
@@ -4,9 +4,9 @@ go 1.16
 
 require (
 	github.com/container-storage-interface/spec v1.5.0
-	github.com/golang/mock v1.4.3
+	github.com/golang/mock v1.5.0
 	github.com/kubernetes-csi/csi-lib-utils v0.10.0
 	github.com/kubernetes-csi/csi-test/v4 v4.0.0-20200806214950-555d70a11a8b
-	google.golang.org/grpc v1.38.0
-	k8s.io/klog/v2 v2.9.0
+	google.golang.org/grpc v1.40.0
+	k8s.io/klog/v2 v2.30.0
 )
diff --git a/go.sum b/go.sum
index 4177c1aa..b778b825 100644
--- a/go.sum
+++ b/go.sum
@@ -67,6 +67,7 @@ github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMn
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
+github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/container-storage-interface/spec v1.3.0/go.mod h1:6URME8mwIBbpVyZV93Ce5St17xBiQJQY67NDsuohiy4=
 github.com/container-storage-interface/spec v1.5.0 h1:lvKxe3uLgqQeVQcrnL2CPQKISoKjTJxojEs9cBk+HXo=
 github.com/container-storage-interface/spec v1.5.0/go.mod h1:8K96oQNkJ7pFcC2R9Z1ynGGBB1I93kcS6PGg3SsOk8s=
@@ -91,6 +92,7 @@ github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.m
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/evanphx/json-patch v4.11.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
@@ -110,8 +112,9 @@ github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
 github.com/go-logr/logr v0.1.0/go.mod h1:ixOQHD9gLJUVQQ2ZOR7zLEifBX6tGkNJF4QyIY7sIas=
-github.com/go-logr/logr v0.4.0 h1:K7/B1jt6fIBQVd4Owv2MqGQClcgf0R266+7C/QjRcLc=
 github.com/go-logr/logr v0.4.0/go.mod h1:z6/tIYblkpsD+a4lm/fGIIU9mZ+XfAiaFtq7xTgseGU=
+github.com/go-logr/logr v1.2.0 h1:QK40JKJyMdUDz+h+xvCsru/bJhvG0UxvePV0ufL/AcE=
+github.com/go-logr/logr v1.2.0/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-openapi/jsonpointer v0.19.3/go.mod h1:Pl9vOtqEWErmShwVjC8pYs9cog34VGT37dQOVbmoatg=
 github.com/go-openapi/jsonreference v0.19.3/go.mod h1:rjx6GuL8TTa9VaixXglHmQmIL98+wF9xc8zWvFonSJ8=
 github.com/go-openapi/swag v0.19.5/go.mod h1:POnQmlKehdgb5mhVOsnJFsivZCEZ/vjK9gh66Z9tfKk=
@@ -130,8 +133,8 @@ github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfb
 github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
 github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
-github.com/golang/mock v1.4.3 h1:GV+pQPG/EUUbkh47niozDcADz6go/dUwhVzdUQHIVRw=
-github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/mock v1.5.0 h1:jlYHihg//f7RRwuPfptm04yp4s7O6Kw8EZiVYIGcH0g=
+github.com/golang/mock v1.5.0/go.mod h1:CWnOUgYIOo4TcNZ0wHX3YZCqsaM1I1Jvs6v3mP3KVu8=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -604,8 +607,9 @@ google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
 google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/grpc v1.37.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
-google.golang.org/grpc v1.38.0 h1:/9BgsAsa5nWe26HqOlvlgJnqBuktYOLCgjCPqsa56W0=
 google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
+google.golang.org/grpc v1.40.0 h1:AGJ0Ih4mHjSeibYkFGh1dD9KJ/eOtZ93I6hoHhukQ5Q=
+google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -660,8 +664,9 @@ k8s.io/component-base v0.22.0 h1:ZTmX8hUqH9T9gc0mM42O+KDgtwTYbVTt2MwmLP0eK8A=
 k8s.io/component-base v0.22.0/go.mod h1:SXj6Z+V6P6GsBhHZVbWCw9hFjUdUYnJerlhhPnYCBCg=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
-k8s.io/klog/v2 v2.9.0 h1:D7HV+n1V57XeZ0m6tdRkfknthUaM06VFbWldOFh8kzM=
 k8s.io/klog/v2 v2.9.0/go.mod h1:hy9LJ/NvuK+iVyP4Ehqva4HxZG/oXyIS3n3Jmire4Ec=
+k8s.io/klog/v2 v2.30.0 h1:bUO6drIvCIsvZ/XFgfxoGFQU/a4Qkh0iAlvUR7vlHJw=
+k8s.io/klog/v2 v2.30.0/go.mod h1:y1WjHnz7Dj687irZUWR/WLkLc5N1YHtjLdmgWjndZn0=
 k8s.io/kube-openapi v0.0.0-20210421082810-95288971da7e/go.mod h1:vHXdDvt9+2spS2Rx9ql3I8tycm3H9FDfdUoIuKCefvw=
 k8s.io/utils v0.0.0-20210707171843-4b05e18ac7d9/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
diff --git a/vendor/github.com/go-logr/logr/.golangci.yaml b/vendor/github.com/go-logr/logr/.golangci.yaml
new file mode 100644
index 00000000..94ff801d
--- /dev/null
+++ b/vendor/github.com/go-logr/logr/.golangci.yaml
@@ -0,0 +1,29 @@
+run:
+  timeout: 1m
+  tests: true
+
+linters:
+  disable-all: true
+  enable:
+    - asciicheck
+    - deadcode
+    - errcheck
+    - forcetypeassert
+    - gocritic
+    - gofmt
+    - goimports
+    - gosimple
+    - govet
+    - ineffassign
+    - misspell
+    - revive
+    - staticcheck
+    - structcheck
+    - typecheck
+    - unused
+    - varcheck
+
+issues:
+  exclude-use-default: false
+  max-issues-per-linter: 0
+  max-same-issues: 10
diff --git a/vendor/github.com/go-logr/logr/CHANGELOG.md b/vendor/github.com/go-logr/logr/CHANGELOG.md
new file mode 100644
index 00000000..c3569600
--- /dev/null
+++ b/vendor/github.com/go-logr/logr/CHANGELOG.md
@@ -0,0 +1,6 @@
+# CHANGELOG
+
+## v1.0.0-rc1
+
+This is the first logged release.  Major changes (including breaking changes)
+have occurred since earlier tags.
diff --git a/vendor/github.com/go-logr/logr/CONTRIBUTING.md b/vendor/github.com/go-logr/logr/CONTRIBUTING.md
new file mode 100644
index 00000000..5d37e294
--- /dev/null
+++ b/vendor/github.com/go-logr/logr/CONTRIBUTING.md
@@ -0,0 +1,17 @@
+# Contributing
+
+Logr is open to pull-requests, provided they fit within the intended scope of
+the project.  Specifically, this library aims to be VERY small and minimalist,
+with no external dependencies.
+
+## Compatibility
+
+This project intends to follow [semantic versioning](http://semver.org) and
+is very strict about compatibility.  Any proposed changes MUST follow those
+rules.
+
+## Performance
+
+As a logging library, logr must be as light-weight as possible.  Any proposed
+code change must include results of running the [benchmark](./benchmark)
+before and after the change.
diff --git a/vendor/github.com/go-logr/logr/README.md b/vendor/github.com/go-logr/logr/README.md
index e9b5520a..ad825f5f 100644
--- a/vendor/github.com/go-logr/logr/README.md
+++ b/vendor/github.com/go-logr/logr/README.md
@@ -1,112 +1,182 @@
-# A more minimal logging API for Go
+# A minimal logging API for Go
 
-Before you consider this package, please read [this blog post by the
-inimitable Dave Cheney][warning-makes-no-sense].  I really appreciate what
-he has to say, and it largely aligns with my own experiences.  Too many
-choices of levels means inconsistent logs.
+[![Go Reference](https://pkg.go.dev/badge/github.com/go-logr/logr.svg)](https://pkg.go.dev/github.com/go-logr/logr)
+
+logr offers an(other) opinion on how Go programs and libraries can do logging
+without becoming coupled to a particular logging implementation.  This is not
+an implementation of logging - it is an API.  In fact it is two APIs with two
+different sets of users.
+
+The `Logger` type is intended for application and library authors.  It provides
+a relatively small API which can be used everywhere you want to emit logs.  It
+defers the actual act of writing logs (to files, to stdout, or whatever) to the
+`LogSink` interface.
+
+The `LogSink` interface is intended for logging library implementers.  It is a
+pure interface which can be implemented by logging frameworks to provide the actual logging
+functionality.
+
+This decoupling allows application and library developers to write code in
+terms of `logr.Logger` (which has very low dependency fan-out) while the
+implementation of logging is managed "up stack" (e.g. in or near `main()`.)
+Application developers can then switch out implementations as necessary.
+
+Many people assert that libraries should not be logging, and as such efforts
+like this are pointless.  Those people are welcome to convince the authors of
+the tens-of-thousands of libraries that *DO* write logs that they are all
+wrong.  In the meantime, logr takes a more practical approach.
+
+## Typical usage
+
+Somewhere, early in an application's life, it will make a decision about which
+logging library (implementation) it actually wants to use.  Something like:
+
+```
+    func main() {
+        // ... other setup code ...
+
+        // Create the "root" logger.  We have chosen the "logimpl" implementation,
+        // which takes some initial parameters and returns a logr.Logger.
+        logger := logimpl.New(param1, param2)
+
+        // ... other setup code ...
+```
+
+Most apps will call into other libraries, create structures to govern the flow,
+etc.  The `logr.Logger` object can be passed to these other libraries, stored
+in structs, or even used as a package-global variable, if needed.  For example:
+
+```
+    app := createTheAppObject(logger)
+    app.Run()
+```
+
+Outside of this early setup, no other packages need to know about the choice of
+implementation.  They write logs in terms of the `logr.Logger` that they
+received:
 
-This package offers a purely abstract interface, based on these ideas but with
-a few twists.  Code can depend on just this interface and have the actual
-logging implementation be injected from callers.  Ideally only `main()` knows
-what logging implementation is being used.
+```
+    type appObject struct {
+        // ... other fields ...
+        logger logr.Logger
+        // ... other fields ...
+    }
 
-# Differences from Dave's ideas
+    func (app *appObject) Run() {
+        app.logger.Info("starting up", "timestamp", time.Now())
+
+        // ... app code ...
+```
+
+## Background
+
+If the Go standard library had defined an interface for logging, this project
+probably would not be needed.  Alas, here we are.
+
+### Inspiration
+
+Before you consider this package, please read [this blog post by the
+inimitable Dave Cheney][warning-makes-no-sense].  We really appreciate what
+he has to say, and it largely aligns with our own experiences.
+
+### Differences from Dave's ideas
 
 The main differences are:
 
-1) Dave basically proposes doing away with the notion of a logging API in favor
-of `fmt.Printf()`.  I disagree, especially when you consider things like output
-locations, timestamps, file and line decorations, and structured logging.  I
-restrict the API to just 2 types of logs: info and error.
+1. Dave basically proposes doing away with the notion of a logging API in favor
+of `fmt.Printf()`.  We disagree, especially when you consider things like output
+locations, timestamps, file and line decorations, and structured logging.  This
+package restricts the logging API to just 2 types of logs: info and error.
 
 Info logs are things you want to tell the user which are not errors.  Error
 logs are, well, errors.  If your code receives an `error` from a subordinate
 function call and is logging that `error` *and not returning it*, use error
 logs.
 
-2) Verbosity-levels on info logs.  This gives developers a chance to indicate
+2. Verbosity-levels on info logs.  This gives developers a chance to indicate
 arbitrary grades of importance for info logs, without assigning names with
-semantic meaning such as "warning", "trace", and "debug".  Superficially this
+semantic meaning such as "warning", "trace", and "debug."  Superficially this
 may feel very similar, but the primary difference is the lack of semantics.
 Because verbosity is a numerical value, it's safe to assume that an app running
 with higher verbosity means more (and less important) logs will be generated.
 
-This is a BETA grade API.
+## Implementations (non-exhaustive)
 
 There are implementations for the following logging libraries:
 
+- **a function** (can bridge to non-structured libraries): [funcr](https://github.com/go-logr/logr/tree/master/funcr)
 - **github.com/google/glog**: [glogr](https://github.com/go-logr/glogr)
-- **k8s.io/klog**: [klogr](https://git.k8s.io/klog/klogr)
+- **k8s.io/klog** (for Kubernetes): [klogr](https://git.k8s.io/klog/klogr)
 - **go.uber.org/zap**: [zapr](https://github.com/go-logr/zapr)
-- **log** (the Go standard library logger):
-  [stdr](https://github.com/go-logr/stdr)
+- **log** (the Go standard library logger): [stdr](https://github.com/go-logr/stdr)
 - **github.com/sirupsen/logrus**: [logrusr](https://github.com/bombsimon/logrusr)
 - **github.com/wojas/genericr**: [genericr](https://github.com/wojas/genericr) (makes it easy to implement your own backend)
 - **logfmt** (Heroku style [logging](https://www.brandur.org/logfmt)): [logfmtr](https://github.com/iand/logfmtr)
+- **github.com/rs/zerolog**: [zerologr](https://github.com/go-logr/zerologr)
 
-# FAQ
+## FAQ
 
-## Conceptual
+### Conceptual
 
-## Why structured logging?
+#### Why structured logging?
 
-- **Structured logs are more easily queriable**: Since you've got
+- **Structured logs are more easily queryable**: Since you've got
   key-value pairs, it's much easier to query your structured logs for
   particular values by filtering on the contents of a particular key --
   think searching request logs for error codes, Kubernetes reconcilers for
-  the name and namespace of the reconciled object, etc
+  the name and namespace of the reconciled object, etc.
 
-- **Structured logging makes it easier to have cross-referencable logs**:
+- **Structured logging makes it easier to have cross-referenceable logs**:
   Similarly to searchability, if you maintain conventions around your
   keys, it becomes easy to gather all log lines related to a particular
   concept.
- 
+
 - **Structured logs allow better dimensions of filtering**: if you have
   structure to your logs, you've got more precise control over how much
   information is logged -- you might choose in a particular configuration
   to log certain keys but not others, only log lines where a certain key
-  matches a certain value, etc, instead of just having v-levels and names
+  matches a certain value, etc., instead of just having v-levels and names
   to key off of.
 
 - **Structured logs better represent structured data**: sometimes, the
   data that you want to log is inherently structured (think tuple-link
-  objects).  Structured logs allow you to preserve that structure when
+  objects.)  Structured logs allow you to preserve that structure when
   outputting.
 
-## Why V-levels?
+#### Why V-levels?
 
 **V-levels give operators an easy way to control the chattiness of log
 operations**.  V-levels provide a way for a given package to distinguish
 the relative importance or verbosity of a given log message.  Then, if
 a particular logger or package is logging too many messages, the user
-of the package can simply change the v-levels for that library. 
+of the package can simply change the v-levels for that library.
 
-## Why not more named levels, like Warning?
+#### Why not named levels, like Info/Warning/Error?
 
 Read [Dave Cheney's post][warning-makes-no-sense].  Then read [Differences
 from Dave's ideas](#differences-from-daves-ideas).
 
-## Why not allow format strings, too?
+#### Why not allow format strings, too?
 
 **Format strings negate many of the benefits of structured logs**:
 
 - They're not easily searchable without resorting to fuzzy searching,
-  regular expressions, etc
+  regular expressions, etc.
 
 - They don't store structured data well, since contents are flattened into
-  a string
+  a string.
 
-- They're not cross-referencable
+- They're not cross-referenceable.
 
-- They don't compress easily, since the message is not constant
+- They don't compress easily, since the message is not constant.
 
-(unless you turn positional parameters into key-value pairs with numerical
+(Unless you turn positional parameters into key-value pairs with numerical
 keys, at which point you've gotten key-value logging with meaningless
-keys)
+keys.)
 
-## Practical
+### Practical
 
-## Why key-value pairs, and not a map?
+#### Why key-value pairs, and not a map?
 
 Key-value pairs are *much* easier to optimize, especially around
 allocations.  Zap (a structured logger that inspired logr's interface) has
@@ -117,26 +187,26 @@ While the interface ends up being a little less obvious, you get
 potentially better performance, plus avoid making users type
 `map[string]string{}` every time they want to log.
 
-## What if my V-levels differ between libraries?
+#### What if my V-levels differ between libraries?
 
 That's fine.  Control your V-levels on a per-logger basis, and use the
-`WithName` function to pass different loggers to different libraries.
+`WithName` method to pass different loggers to different libraries.
 
 Generally, you should take care to ensure that you have relatively
 consistent V-levels within a given logger, however, as this makes deciding
 on what verbosity of logs to request easier.
 
-## But I *really* want to use a format string!
+#### But I really want to use a format string!
 
 That's not actually a question.  Assuming your question is "how do
 I convert my mental model of logging with format strings to logging with
 constant messages":
 
-1. figure out what the error actually is, as you'd write in a TL;DR style,
-   and use that as a message
+1. Figure out what the error actually is, as you'd write in a TL;DR style,
+   and use that as a message.
 
 2. For every place you'd write a format specifier, look to the word before
-   it, and add that as a key value pair
+   it, and add that as a key value pair.
 
 For instance, consider the following examples (all taken from spots in the
 Kubernetes codebase):
@@ -150,34 +220,59 @@ Kubernetes codebase):
   response when requesting url", "attempt", retries, "after
   seconds", seconds, "url", url)`
 
-If you *really* must use a format string, place it as a key value, and
-call `fmt.Sprintf` yourself -- for instance, `log.Printf("unable to
+If you *really* must use a format string, use it in a key's value, and
+call `fmt.Sprintf` yourself.  For instance: `log.Printf("unable to
 reflect over type %T")` becomes `logger.Info("unable to reflect over
 type", "type", fmt.Sprintf("%T"))`.  In general though, the cases where
 this is necessary should be few and far between.
 
-## How do I choose my V-levels?
+#### How do I choose my V-levels?
 
 This is basically the only hard constraint: increase V-levels to denote
 more verbose or more debug-y logs.
 
 Otherwise, you can start out with `0` as "you always want to see this",
 `1` as "common logging that you might *possibly* want to turn off", and
-`10` as "I would like to performance-test your log collection stack".
+`10` as "I would like to performance-test your log collection stack."
 
 Then gradually choose levels in between as you need them, working your way
 down from 10 (for debug and trace style logs) and up from 1 (for chattier
-info-type logs).
+info-type logs.)
+
+#### How do I choose my keys?
 
-## How do I choose my keys
+Keys are fairly flexible, and can hold more or less any string
+value. For best compatibility with implementations and consistency
+with existing code in other projects, there are a few conventions you
+should consider.
 
-- make your keys human-readable
-- constant keys are generally a good idea
-- be consistent across your codebase
-- keys should naturally match parts of the message string
+- Make your keys human-readable.
+- Constant keys are generally a good idea.
+- Be consistent across your codebase.
+- Keys should naturally match parts of the message string.
+- Use lower case for simple keys and
+  [lowerCamelCase](https://en.wiktionary.org/wiki/lowerCamelCase) for
+  more complex ones. Kubernetes is one example of a project that has
+  [adopted that
+  convention](https://github.com/kubernetes/community/blob/HEAD/contributors/devel/sig-instrumentation/migration-to-structured-logging.md#name-arguments).
 
 While key names are mostly unrestricted (and spaces are acceptable),
 it's generally a good idea to stick to printable ascii characters, or at
 least match the general character set of your log lines.
 
+#### Why should keys be constant values?
+
+The point of structured logging is to make later log processing easier.  Your
+keys are, effectively, the schema of each log message.  If you use different
+keys across instances of the same log line, you will make your structured logs
+much harder to use.  `Sprintf()` is for values, not for keys!
+
+#### Why is this not a pure interface?
+
+The Logger type is implemented as a struct in order to allow the Go compiler to
+optimize things like high-V `Info` logs that are not triggered.  Not all of
+these implementations are implemented yet, but this structure was suggested as
+a way to ensure they *can* be implemented.  All of the real work is behind the
+`LogSink` interface.
+
 [warning-makes-no-sense]: http://dave.cheney.net/2015/11/05/lets-talk-about-logging
diff --git a/vendor/github.com/go-logr/logr/discard.go b/vendor/github.com/go-logr/logr/discard.go
index 2bafb13d..9d92a38f 100644
--- a/vendor/github.com/go-logr/logr/discard.go
+++ b/vendor/github.com/go-logr/logr/discard.go
@@ -16,36 +16,39 @@ limitations under the License.
 
 package logr
 
-// Discard returns a valid Logger that discards all messages logged to it.
-// It can be used whenever the caller is not interested in the logs.
+// Discard returns a Logger that discards all messages logged to it.  It can be
+// used whenever the caller is not interested in the logs.  Logger instances
+// produced by this function always compare as equal.
 func Discard() Logger {
-	return DiscardLogger{}
+	return Logger{
+		level: 0,
+		sink:  discardLogSink{},
+	}
 }
 
-// DiscardLogger is a Logger that discards all messages.
-type DiscardLogger struct{}
+// discardLogSink is a LogSink that discards all messages.
+type discardLogSink struct{}
 
-func (l DiscardLogger) Enabled() bool {
-	return false
+// Verify that it actually implements the interface
+var _ LogSink = discardLogSink{}
+
+func (l discardLogSink) Init(RuntimeInfo) {
 }
 
-func (l DiscardLogger) Info(msg string, keysAndValues ...interface{}) {
+func (l discardLogSink) Enabled(int) bool {
+	return false
 }
 
-func (l DiscardLogger) Error(err error, msg string, keysAndValues ...interface{}) {
+func (l discardLogSink) Info(int, string, ...interface{}) {
 }
 
-func (l DiscardLogger) V(level int) Logger {
-	return l
+func (l discardLogSink) Error(error, string, ...interface{}) {
 }
 
-func (l DiscardLogger) WithValues(keysAndValues ...interface{}) Logger {
+func (l discardLogSink) WithValues(...interface{}) LogSink {
 	return l
 }
 
-func (l DiscardLogger) WithName(name string) Logger {
+func (l discardLogSink) WithName(string) LogSink {
 	return l
 }
-
-// Verify that it actually implements the interface
-var _ Logger = DiscardLogger{}
diff --git a/vendor/github.com/go-logr/logr/go.mod b/vendor/github.com/go-logr/logr/go.mod
index 591884e9..7baec9b5 100644
--- a/vendor/github.com/go-logr/logr/go.mod
+++ b/vendor/github.com/go-logr/logr/go.mod
@@ -1,3 +1,3 @@
 module github.com/go-logr/logr
 
-go 1.14
+go 1.16
diff --git a/vendor/github.com/go-logr/logr/logr.go b/vendor/github.com/go-logr/logr/logr.go
index 842428bd..44cd398c 100644
--- a/vendor/github.com/go-logr/logr/logr.go
+++ b/vendor/github.com/go-logr/logr/logr.go
@@ -16,83 +16,101 @@ limitations under the License.
 
 // This design derives from Dave Cheney's blog:
 //     http://dave.cheney.net/2015/11/05/lets-talk-about-logging
-//
-// This is a BETA grade API.  Until there is a significant 2nd implementation,
-// I don't really know how it will change.
 
-// Package logr defines abstract interfaces for logging.  Packages can depend on
-// these interfaces and callers can implement logging in whatever way is
-// appropriate.
+// Package logr defines a general-purpose logging API and abstract interfaces
+// to back that API.  Packages in the Go ecosystem can depend on this package,
+// while callers can implement logging with whatever backend is appropriate.
 //
 // Usage
 //
-// Logging is done using a Logger.  Loggers can have name prefixes and named
-// values attached, so that all log messages logged with that Logger have some
-// base context associated.
+// Logging is done using a Logger instance.  Logger is a concrete type with
+// methods, which defers the actual logging to a LogSink interface.  The main
+// methods of Logger are Info() and Error().  Arguments to Info() and Error()
+// are key/value pairs rather than printf-style formatted strings, emphasizing
+// "structured logging".
 //
-// The term "key" is used to refer to the name associated with a particular
-// value, to disambiguate it from the general Logger name.
+// With Go's standard log package, we might write:
+//   log.Printf("setting target value %s", targetValue)
 //
-// For instance, suppose we're trying to reconcile the state of an object, and
-// we want to log that we've made some decision.
+// With logr's structured logging, we'd write:
+//   logger.Info("setting target", "value", targetValue)
 //
-// With the traditional log package, we might write:
-//   log.Printf("decided to set field foo to value %q for object %s/%s",
-//       targetValue, object.Namespace, object.Name)
+// Errors are much the same.  Instead of:
+//   log.Printf("failed to open the pod bay door for user %s: %v", user, err)
 //
-// With logr's structured logging, we'd write:
-//   // elsewhere in the file, set up the logger to log with the prefix of
-//   // "reconcilers", and the named value target-type=Foo, for extra context.
-//   log := mainLogger.WithName("reconcilers").WithValues("target-type", "Foo")
+// We'd write:
+//   logger.Error(err, "failed to open the pod bay door", "user", user)
 //
-//   // later on...
-//   log.Info("setting foo on object", "value", targetValue, "object", object)
+// Info() and Error() are very similar, but they are separate methods so that
+// LogSink implementations can choose to do things like attach additional
+// information (such as stack traces) on calls to Error().
+//
+// Verbosity
+//
+// Often we want to log information only when the application in "verbose
+// mode".  To write log lines that are more verbose, Logger has a V() method.
+// The higher the V-level of a log line, the less critical it is considered.
+// Log-lines with V-levels that are not enabled (as per the LogSink) will not
+// be written.  Level V(0) is the default, and logger.V(0).Info() has the same
+// meaning as logger.Info().  Negative V-levels have the same meaning as V(0).
+//
+// Where we might have written:
+//   if flVerbose >= 2 {
+//       log.Printf("an unusual thing happened")
+//   }
+//
+// We can write:
+//   logger.V(2).Info("an unusual thing happened")
+//
+// Logger Names
+//
+// Logger instances can have name strings so that all messages logged through
+// that instance have additional context.  For example, you might want to add
+// a subsystem name:
 //
-// Depending on our logging implementation, we could then make logging decisions
-// based on field values (like only logging such events for objects in a certain
-// namespace), or copy the structured information into a structured log store.
+//   logger.WithName("compactor").Info("started", "time", time.Now())
 //
-// For logging errors, Logger has a method called Error.  Suppose we wanted to
-// log an error while reconciling.  With the traditional log package, we might
-// write:
-//   log.Errorf("unable to reconcile object %s/%s: %v", object.Namespace, object.Name, err)
+// The WithName() method returns a new Logger, which can be passed to
+// constructors or other functions for further use.  Repeated use of WithName()
+// will accumulate name "segments".  These name segments will be joined in some
+// way by the LogSink implementation.  It is strongly recommended that name
+// segments contain simple identifiers (letters, digits, and hyphen), and do
+// not contain characters that could muddle the log output or confuse the
+// joining operation (e.g. whitespace, commas, periods, slashes, brackets,
+// quotes, etc).
 //
-// With logr, we'd instead write:
-//   // assuming the above setup for log
-//   log.Error(err, "unable to reconcile object", "object", object)
+// Saved Values
 //
-// This functions similarly to:
-//   log.Info("unable to reconcile object", "error", err, "object", object)
+// Logger instances can store any number of key/value pairs, which will be
+// logged alongside all messages logged through that instance.  For example,
+// you might want to create a Logger instance per managed object:
 //
-// However, it ensures that a standard key for the error value ("error") is used
-// across all error logging.  Furthermore, certain implementations may choose to
-// attach additional information (such as stack traces) on calls to Error, so
-// it's preferred to use Error to log errors.
+// With the standard log package, we might write:
+//   log.Printf("decided to set field foo to value %q for object %s/%s",
+//       targetValue, object.Namespace, object.Name)
 //
-// Parts of a log line
+// With logr we'd write:
+//   // Elsewhere: set up the logger to log the object name.
+//   obj.logger = mainLogger.WithValues(
+//       "name", obj.name, "namespace", obj.namespace)
 //
-// Each log message from a Logger has four types of context:
-// logger name, log verbosity, log message, and the named values.
+//   // later on...
+//   obj.logger.Info("setting foo", "value", targetValue)
 //
-// The Logger name consists of a series of name "segments" added by successive
-// calls to WithName.  These name segments will be joined in some way by the
-// underlying implementation.  It is strongly recommended that name segments
-// contain simple identifiers (letters, digits, and hyphen), and do not contain
-// characters that could muddle the log output or confuse the joining operation
-// (e.g.  whitespace, commas, periods, slashes, brackets, quotes, etc).
+// Best Practices
 //
-// Log verbosity represents how little a log matters.  Level zero, the default,
-// matters most.  Increasing levels matter less and less.  Try to avoid lots of
-// different verbosity levels, and instead provide useful keys, logger names,
-// and log messages for users to filter on.  It's illegal to pass a log level
-// below zero.
+// Logger has very few hard rules, with the goal that LogSink implementations
+// might have a lot of freedom to differentiate.  There are, however, some
+// things to consider.
 //
 // The log message consists of a constant message attached to the log line.
 // This should generally be a simple description of what's occurring, and should
-// never be a format string.
+// never be a format string.  Variable information can then be attached using
+// named values.
 //
-// Variable information can then be attached using named values (key/value
-// pairs).  Keys are arbitrary strings, while values may be any Go value.
+// Keys are arbitrary strings, but should generally be constant values.  Values
+// may be any Go value, but how the value is formatted is determined by the
+// LogSink implementation.
 //
 // Key Naming Conventions
 //
@@ -102,6 +120,7 @@ limitations under the License.
 //   * be constant (not dependent on input data)
 //   * contain only printable characters
 //   * not contain whitespace or punctuation
+//   * use lower case for simple keys and lowerCamelCase for more complex ones
 //
 // These guidelines help ensure that log data is processed properly regardless
 // of the log implementation.  For example, log implementations will try to
@@ -110,21 +129,22 @@ limitations under the License.
 // While users are generally free to use key names of their choice, it's
 // generally best to avoid using the following keys, as they're frequently used
 // by implementations:
-//
-//   * `"caller"`: the calling information (file/line) of a particular log line.
-//   * `"error"`: the underlying error value in the `Error` method.
-//   * `"level"`: the log level.
-//   * `"logger"`: the name of the associated logger.
-//   * `"msg"`: the log message.
-//   * `"stacktrace"`: the stack trace associated with a particular log line or
-//                     error (often from the `Error` message).
-//   * `"ts"`: the timestamp for a log line.
+//   * "caller": the calling information (file/line) of a particular log line
+//   * "error": the underlying error value in the `Error` method
+//   * "level": the log level
+//   * "logger": the name of the associated logger
+//   * "msg": the log message
+//   * "stacktrace": the stack trace associated with a particular log line or
+//                   error (often from the `Error` message)
+//   * "ts": the timestamp for a log line
 //
 // Implementations are encouraged to make use of these keys to represent the
 // above concepts, when necessary (for example, in a pure-JSON output form, it
 // would be necessary to represent at least message and timestamp as ordinary
 // named values).
 //
+// Break Glass
+//
 // Implementations may choose to give callers access to the underlying
 // logging implementation.  The recommended pattern for this is:
 //   // Underlier exposes access to the underlying logging implementation.
@@ -134,81 +154,220 @@ limitations under the License.
 //   type Underlier interface {
 //       GetUnderlying() <underlying-type>
 //   }
+//
+// Logger grants access to the sink to enable type assertions like this:
+//   func DoSomethingWithImpl(log logr.Logger) {
+//       if underlier, ok := log.GetSink()(impl.Underlier) {
+//          implLogger := underlier.GetUnderlying()
+//          ...
+//       }
+//   }
+//
+// Custom `With*` functions can be implemented by copying the complete
+// Logger struct and replacing the sink in the copy:
+//   // WithFooBar changes the foobar parameter in the log sink and returns a
+//   // new logger with that modified sink.  It does nothing for loggers where
+//   // the sink doesn't support that parameter.
+//   func WithFoobar(log logr.Logger, foobar int) logr.Logger {
+//      if foobarLogSink, ok := log.GetSink()(FoobarSink); ok {
+//         log = log.WithSink(foobarLogSink.WithFooBar(foobar))
+//      }
+//      return log
+//   }
+//
+// Don't use New to construct a new Logger with a LogSink retrieved from an
+// existing Logger. Source code attribution might not work correctly and
+// unexported fields in Logger get lost.
+//
+// Beware that the same LogSink instance may be shared by different logger
+// instances. Calling functions that modify the LogSink will affect all of
+// those.
 package logr
 
 import (
 	"context"
 )
 
-// TODO: consider adding back in format strings if they're really needed
-// TODO: consider other bits of zap/zapcore functionality like ObjectMarshaller (for arbitrary objects)
-// TODO: consider other bits of glog functionality like Flush, OutputStats
+// New returns a new Logger instance.  This is primarily used by libraries
+// implementing LogSink, rather than end users.
+func New(sink LogSink) Logger {
+	logger := Logger{}
+	logger.setSink(sink)
+	sink.Init(runtimeInfo)
+	return logger
+}
 
-// Logger represents the ability to log messages, both errors and not.
-type Logger interface {
-	// Enabled tests whether this Logger is enabled.  For example, commandline
-	// flags might be used to set the logging verbosity and disable some info
-	// logs.
-	Enabled() bool
+// setSink stores the sink and updates any related fields. It mutates the
+// logger and thus is only safe to use for loggers that are not currently being
+// used concurrently.
+func (l *Logger) setSink(sink LogSink) {
+	l.sink = sink
+}
 
-	// Info logs a non-error message with the given key/value pairs as context.
-	//
-	// The msg argument should be used to add some constant description to
-	// the log line.  The key/value pairs can then be used to add additional
-	// variable information.  The key/value pairs should alternate string
-	// keys and arbitrary values.
-	Info(msg string, keysAndValues ...interface{})
-
-	// Error logs an error, with the given message and key/value pairs as context.
-	// It functions similarly to calling Info with the "error" named value, but may
-	// have unique behavior, and should be preferred for logging errors (see the
-	// package documentations for more information).
-	//
-	// The msg field should be used to add context to any underlying error,
-	// while the err field should be used to attach the actual error that
-	// triggered this log line, if present.
-	Error(err error, msg string, keysAndValues ...interface{})
+// GetSink returns the stored sink.
+func (l Logger) GetSink() LogSink {
+	return l.sink
+}
+
+// WithSink returns a copy of the logger with the new sink.
+func (l Logger) WithSink(sink LogSink) Logger {
+	l.setSink(sink)
+	return l
+}
+
+// Logger is an interface to an abstract logging implementation.  This is a
+// concrete type for performance reasons, but all the real work is passed on to
+// a LogSink.  Implementations of LogSink should provide their own constructors
+// that return Logger, not LogSink.
+//
+// The underlying sink can be accessed through GetSink and be modified through
+// WithSink. This enables the implementation of custom extensions (see "Break
+// Glass" in the package documentation). Normally the sink should be used only
+// indirectly.
+type Logger struct {
+	sink  LogSink
+	level int
+}
+
+// Enabled tests whether this Logger is enabled.  For example, commandline
+// flags might be used to set the logging verbosity and disable some info logs.
+func (l Logger) Enabled() bool {
+	return l.sink.Enabled(l.level)
+}
+
+// Info logs a non-error message with the given key/value pairs as context.
+//
+// The msg argument should be used to add some constant description to the log
+// line.  The key/value pairs can then be used to add additional variable
+// information.  The key/value pairs must alternate string keys and arbitrary
+// values.
+func (l Logger) Info(msg string, keysAndValues ...interface{}) {
+	if l.Enabled() {
+		if withHelper, ok := l.sink.(CallStackHelperLogSink); ok {
+			withHelper.GetCallStackHelper()()
+		}
+		l.sink.Info(l.level, msg, keysAndValues...)
+	}
+}
+
+// Error logs an error, with the given message and key/value pairs as context.
+// It functions similarly to Info, but may have unique behavior, and should be
+// preferred for logging errors (see the package documentations for more
+// information).
+//
+// The msg argument should be used to add context to any underlying error,
+// while the err argument should be used to attach the actual error that
+// triggered this log line, if present.
+func (l Logger) Error(err error, msg string, keysAndValues ...interface{}) {
+	if withHelper, ok := l.sink.(CallStackHelperLogSink); ok {
+		withHelper.GetCallStackHelper()()
+	}
+	l.sink.Error(err, msg, keysAndValues...)
+}
+
+// V returns a new Logger instance for a specific verbosity level, relative to
+// this Logger.  In other words, V-levels are additive.  A higher verbosity
+// level means a log message is less important.  Negative V-levels are treated
+// as 0.
+func (l Logger) V(level int) Logger {
+	if level < 0 {
+		level = 0
+	}
+	l.level += level
+	return l
+}
+
+// WithValues returns a new Logger instance with additional key/value pairs.
+// See Info for documentation on how key/value pairs work.
+func (l Logger) WithValues(keysAndValues ...interface{}) Logger {
+	l.setSink(l.sink.WithValues(keysAndValues...))
+	return l
+}
 
-	// V returns an Logger value for a specific verbosity level, relative to
-	// this Logger.  In other words, V values are additive.  V higher verbosity
-	// level means a log message is less important.  It's illegal to pass a log
-	// level less than zero.
-	V(level int) Logger
-
-	// WithValues adds some key-value pairs of context to a logger.
-	// See Info for documentation on how key/value pairs work.
-	WithValues(keysAndValues ...interface{}) Logger
-
-	// WithName adds a new element to the logger's name.
-	// Successive calls with WithName continue to append
-	// suffixes to the logger's name.  It's strongly recommended
-	// that name segments contain only letters, digits, and hyphens
-	// (see the package documentation for more information).
-	WithName(name string) Logger
+// WithName returns a new Logger instance with the specified name element added
+// to the Logger's name.  Successive calls with WithName append additional
+// suffixes to the Logger's name.  It's strongly recommended that name segments
+// contain only letters, digits, and hyphens (see the package documentation for
+// more information).
+func (l Logger) WithName(name string) Logger {
+	l.setSink(l.sink.WithName(name))
+	return l
 }
 
-// InfoLogger provides compatibility with code that relies on the v0.1.0
-// interface.
+// WithCallDepth returns a Logger instance that offsets the call stack by the
+// specified number of frames when logging call site information, if possible.
+// This is useful for users who have helper functions between the "real" call
+// site and the actual calls to Logger methods.  If depth is 0 the attribution
+// should be to the direct caller of this function.  If depth is 1 the
+// attribution should skip 1 call frame, and so on.  Successive calls to this
+// are additive.
+//
+// If the underlying log implementation supports a WithCallDepth(int) method,
+// it will be called and the result returned.  If the implementation does not
+// support CallDepthLogSink, the original Logger will be returned.
+//
+// To skip one level, WithCallStackHelper() should be used instead of
+// WithCallDepth(1) because it works with implementions that support the
+// CallDepthLogSink and/or CallStackHelperLogSink interfaces.
+func (l Logger) WithCallDepth(depth int) Logger {
+	if withCallDepth, ok := l.sink.(CallDepthLogSink); ok {
+		l.setSink(withCallDepth.WithCallDepth(depth))
+	}
+	return l
+}
+
+// WithCallStackHelper returns a new Logger instance that skips the direct
+// caller when logging call site information, if possible.  This is useful for
+// users who have helper functions between the "real" call site and the actual
+// calls to Logger methods and want to support loggers which depend on marking
+// each individual helper function, like loggers based on testing.T.
+//
+// In addition to using that new logger instance, callers also must call the
+// returned function.
 //
-// Deprecated: InfoLogger is an artifact of early versions of this API.  New
-// users should never use it and existing users should use Logger instead. This
-// will be removed in a future release.
-type InfoLogger = Logger
+// If the underlying log implementation supports a WithCallDepth(int) method,
+// WithCallDepth(1) will be called to produce a new logger. If it supports a
+// WithCallStackHelper() method, that will be also called. If the
+// implementation does not support either of these, the original Logger will be
+// returned.
+func (l Logger) WithCallStackHelper() (func(), Logger) {
+	var helper func()
+	if withCallDepth, ok := l.sink.(CallDepthLogSink); ok {
+		l.setSink(withCallDepth.WithCallDepth(1))
+	}
+	if withHelper, ok := l.sink.(CallStackHelperLogSink); ok {
+		helper = withHelper.GetCallStackHelper()
+	} else {
+		helper = func() {}
+	}
+	return helper, l
+}
 
+// contextKey is how we find Loggers in a context.Context.
 type contextKey struct{}
 
-// FromContext returns a Logger constructed from ctx or nil if no
-// logger details are found.
-func FromContext(ctx context.Context) Logger {
+// FromContext returns a Logger from ctx or an error if no Logger is found.
+func FromContext(ctx context.Context) (Logger, error) {
 	if v, ok := ctx.Value(contextKey{}).(Logger); ok {
-		return v
+		return v, nil
 	}
 
-	return nil
+	return Logger{}, notFoundError{}
 }
 
-// FromContextOrDiscard returns a Logger constructed from ctx or a Logger
-// that discards all messages if no logger details are found.
+// notFoundError exists to carry an IsNotFound method.
+type notFoundError struct{}
+
+func (notFoundError) Error() string {
+	return "no logr.Logger was present"
+}
+
+func (notFoundError) IsNotFound() bool {
+	return true
+}
+
+// FromContextOrDiscard returns a Logger from ctx.  If no Logger is found, this
+// returns a Logger that discards all log messages.
 func FromContextOrDiscard(ctx context.Context) Logger {
 	if v, ok := ctx.Value(contextKey{}).(Logger); ok {
 		return v
@@ -217,12 +376,59 @@ func FromContextOrDiscard(ctx context.Context) Logger {
 	return Discard()
 }
 
-// NewContext returns a new context derived from ctx that embeds the Logger.
-func NewContext(ctx context.Context, l Logger) context.Context {
-	return context.WithValue(ctx, contextKey{}, l)
+// NewContext returns a new Context, derived from ctx, which carries the
+// provided Logger.
+func NewContext(ctx context.Context, logger Logger) context.Context {
+	return context.WithValue(ctx, contextKey{}, logger)
 }
 
-// CallDepthLogger represents a Logger that knows how to climb the call stack
+// RuntimeInfo holds information that the logr "core" library knows which
+// LogSinks might want to know.
+type RuntimeInfo struct {
+	// CallDepth is the number of call frames the logr library adds between the
+	// end-user and the LogSink.  LogSink implementations which choose to print
+	// the original logging site (e.g. file & line) should climb this many
+	// additional frames to find it.
+	CallDepth int
+}
+
+// runtimeInfo is a static global.  It must not be changed at run time.
+var runtimeInfo = RuntimeInfo{
+	CallDepth: 1,
+}
+
+// LogSink represents a logging implementation.  End-users will generally not
+// interact with this type.
+type LogSink interface {
+	// Init receives optional information about the logr library for LogSink
+	// implementations that need it.
+	Init(info RuntimeInfo)
+
+	// Enabled tests whether this LogSink is enabled at the specified V-level.
+	// For example, commandline flags might be used to set the logging
+	// verbosity and disable some info logs.
+	Enabled(level int) bool
+
+	// Info logs a non-error message with the given key/value pairs as context.
+	// The level argument is provided for optional logging.  This method will
+	// only be called when Enabled(level) is true. See Logger.Info for more
+	// details.
+	Info(level int, msg string, keysAndValues ...interface{})
+
+	// Error logs an error, with the given message and key/value pairs as
+	// context.  See Logger.Error for more details.
+	Error(err error, msg string, keysAndValues ...interface{})
+
+	// WithValues returns a new LogSink with additional key/value pairs.  See
+	// Logger.WithValues for more details.
+	WithValues(keysAndValues ...interface{}) LogSink
+
+	// WithName returns a new LogSink with the specified name appended.  See
+	// Logger.WithName for more details.
+	WithName(name string) LogSink
+}
+
+// CallDepthLogSink represents a Logger that knows how to climb the call stack
 // to identify the original call site and can offset the depth by a specified
 // number of frames.  This is useful for users who have helper functions
 // between the "real" call site and the actual calls to Logger methods.
@@ -232,35 +438,59 @@ func NewContext(ctx context.Context, l Logger) context.Context {
 //
 // This is an optional interface and implementations are not required to
 // support it.
-type CallDepthLogger interface {
-	Logger
-
-	// WithCallDepth returns a Logger that will offset the call stack by the
-	// specified number of frames when logging call site information.  If depth
-	// is 0 the attribution should be to the direct caller of this method.  If
-	// depth is 1 the attribution should skip 1 call frame, and so on.
+type CallDepthLogSink interface {
+	// WithCallDepth returns a LogSink that will offset the call
+	// stack by the specified number of frames when logging call
+	// site information.
+	//
+	// If depth is 0, the LogSink should skip exactly the number
+	// of call frames defined in RuntimeInfo.CallDepth when Info
+	// or Error are called, i.e. the attribution should be to the
+	// direct caller of Logger.Info or Logger.Error.
+	//
+	// If depth is 1 the attribution should skip 1 call frame, and so on.
 	// Successive calls to this are additive.
-	WithCallDepth(depth int) Logger
+	WithCallDepth(depth int) LogSink
 }
 
-// WithCallDepth returns a Logger that will offset the call stack by the
-// specified number of frames when logging call site information, if possible.
-// This is useful for users who have helper functions between the "real" call
-// site and the actual calls to Logger methods.  If depth is 0 the attribution
-// should be to the direct caller of this function.  If depth is 1 the
-// attribution should skip 1 call frame, and so on.  Successive calls to this
-// are additive.
+// CallStackHelperLogSink represents a Logger that knows how to climb
+// the call stack to identify the original call site and can skip
+// intermediate helper functions if they mark themselves as
+// helper. Go's testing package uses that approach.
 //
-// If the underlying log implementation supports the CallDepthLogger interface,
-// the WithCallDepth method will be called and the result returned.  If the
-// implementation does not support CallDepthLogger, the original Logger will be
-// returned.
+// This is useful for users who have helper functions between the
+// "real" call site and the actual calls to Logger methods.
+// Implementations that log information about the call site (such as
+// file, function, or line) would otherwise log information about the
+// intermediate helper functions.
 //
-// Callers which care about whether this was supported or not should test for
-// CallDepthLogger support themselves.
-func WithCallDepth(logger Logger, depth int) Logger {
-	if decorator, ok := logger.(CallDepthLogger); ok {
-		return decorator.WithCallDepth(depth)
-	}
-	return logger
+// This is an optional interface and implementations are not required
+// to support it. Implementations that choose to support this must not
+// simply implement it as WithCallDepth(1), because
+// Logger.WithCallStackHelper will call both methods if they are
+// present. This should only be implemented for LogSinks that actually
+// need it, as with testing.T.
+type CallStackHelperLogSink interface {
+	// GetCallStackHelper returns a function that must be called
+	// to mark the direct caller as helper function when logging
+	// call site information.
+	GetCallStackHelper() func()
+}
+
+// Marshaler is an optional interface that logged values may choose to
+// implement. Loggers with structured output, such as JSON, should
+// log the object return by the MarshalLog method instead of the
+// original value.
+type Marshaler interface {
+	// MarshalLog can be used to:
+	//   - ensure that structs are not logged as strings when the original
+	//     value has a String method: return a different type without a
+	//     String method
+	//   - select which fields of a complex type should get logged:
+	//     return a simpler struct with fewer fields
+	//   - log unexported fields: return a different struct
+	//     with exported fields
+	//
+	// It may return any value of any type.
+	MarshalLog() interface{}
 }
diff --git a/vendor/github.com/golang/mock/gomock/call.go b/vendor/github.com/golang/mock/gomock/call.go
index 7345f654..b18cc2d6 100644
--- a/vendor/github.com/golang/mock/gomock/call.go
+++ b/vendor/github.com/golang/mock/gomock/call.go
@@ -63,6 +63,9 @@ func newCall(t TestHelper, receiver interface{}, method string, methodType refle
 		}
 	}
 
+	// callerInfo's skip should be updated if the number of calls between the user's test
+	// and this line changes, i.e. this code is wrapped in another anonymous function.
+	// 0 is us, 1 is RecordCallWithMethodType(), 2 is the generated recorder, and 3 is the user's test.
 	origin := callerInfo(3)
 	actions := []func([]interface{}) []interface{}{func([]interface{}) []interface{} {
 		// Synthesize the zero value for each of the return args' types.
@@ -301,14 +304,9 @@ func (c *Call) matches(args []interface{}) error {
 
 		for i, m := range c.args {
 			if !m.Matches(args[i]) {
-				got := fmt.Sprintf("%v", args[i])
-				if gs, ok := m.(GotFormatter); ok {
-					got = gs.Got(args[i])
-				}
-
 				return fmt.Errorf(
 					"expected call at %s doesn't match the argument at index %d.\nGot: %v\nWant: %v",
-					c.origin, i, got, m,
+					c.origin, i, formatGottenArg(m, args[i]), m,
 				)
 			}
 		}
@@ -331,7 +329,7 @@ func (c *Call) matches(args []interface{}) error {
 				// Non-variadic args
 				if !m.Matches(args[i]) {
 					return fmt.Errorf("expected call at %s doesn't match the argument at index %s.\nGot: %v\nWant: %v",
-						c.origin, strconv.Itoa(i), args[i], m)
+						c.origin, strconv.Itoa(i), formatGottenArg(m, args[i]), m)
 				}
 				continue
 			}
@@ -373,9 +371,9 @@ func (c *Call) matches(args []interface{}) error {
 			// Got Foo(a, b, c, d) want Foo(matcherA, matcherB, matcherC, matcherD, matcherE)
 			// Got Foo(a, b, c, d, e) want Foo(matcherA, matcherB, matcherC, matcherD)
 			// Got Foo(a, b, c) want Foo(matcherA, matcherB)
-			return fmt.Errorf("Expected call at %s doesn't match the argument at index %s.\nGot: %v\nWant: %v",
-				c.origin, strconv.Itoa(i), args[i:], c.args[i])
 
+			return fmt.Errorf("expected call at %s doesn't match the argument at index %s.\nGot: %v\nWant: %v",
+				c.origin, strconv.Itoa(i), formatGottenArg(m, args[i:]), c.args[i])
 		}
 	}
 
@@ -425,3 +423,11 @@ func setSlice(arg interface{}, v reflect.Value) {
 func (c *Call) addAction(action func([]interface{}) []interface{}) {
 	c.actions = append(c.actions, action)
 }
+
+func formatGottenArg(m Matcher, arg interface{}) string {
+	got := fmt.Sprintf("%v", arg)
+	if gs, ok := m.(GotFormatter); ok {
+		got = gs.Got(arg)
+	}
+	return got
+}
diff --git a/vendor/github.com/golang/mock/gomock/callset.go b/vendor/github.com/golang/mock/gomock/callset.go
index b046b525..e4e85d60 100644
--- a/vendor/github.com/golang/mock/gomock/callset.go
+++ b/vendor/github.com/golang/mock/gomock/callset.go
@@ -84,7 +84,11 @@ func (cs callSet) FindMatch(receiver interface{}, method string, args []interfac
 	for _, call := range exhausted {
 		if err := call.matches(args); err != nil {
 			_, _ = fmt.Fprintf(&callsErrors, "\n%v", err)
+			continue
 		}
+		_, _ = fmt.Fprintf(
+			&callsErrors, "all expected calls for method %q have been exhausted", method,
+		)
 	}
 
 	if len(expected)+len(exhausted) == 0 {
diff --git a/vendor/github.com/golang/mock/gomock/controller.go b/vendor/github.com/golang/mock/gomock/controller.go
index d7c3c656..3b656909 100644
--- a/vendor/github.com/golang/mock/gomock/controller.go
+++ b/vendor/github.com/golang/mock/gomock/controller.go
@@ -50,9 +50,6 @@
 //         mockObj.EXPECT().SomeMethod(2, "second"),
 //         mockObj.EXPECT().SomeMethod(3, "third"),
 //     )
-//
-// TODO:
-//	- Handle different argument/return types (e.g. ..., chan, map, interface).
 package gomock
 
 import (
@@ -77,6 +74,15 @@ type TestHelper interface {
 	Helper()
 }
 
+// cleanuper is used to check if TestHelper also has the `Cleanup` method. A
+// common pattern is to pass in a `*testing.T` to
+// `NewController(t TestReporter)`. In Go 1.14+, `*testing.T` has a cleanup
+// method. This can be utilized to call `Finish()` so the caller of this library
+// does not have to.
+type cleanuper interface {
+	Cleanup(func())
+}
+
 // A Controller represents the top-level control of a mock ecosystem.  It
 // defines the scope and lifetime of mock objects, as well as their
 // expectations.  It is safe to call Controller's methods from multiple
@@ -115,29 +121,43 @@ type Controller struct {
 
 // NewController returns a new Controller. It is the preferred way to create a
 // Controller.
+//
+// New in go1.14+, if you are passing a *testing.T into this function you no
+// longer need to call ctrl.Finish() in your test methods
 func NewController(t TestReporter) *Controller {
 	h, ok := t.(TestHelper)
 	if !ok {
-		h = nopTestHelper{t}
+		h = &nopTestHelper{t}
 	}
-
-	return &Controller{
+	ctrl := &Controller{
 		T:             h,
 		expectedCalls: newCallSet(),
 	}
+	if c, ok := isCleanuper(ctrl.T); ok {
+		c.Cleanup(func() {
+			ctrl.T.Helper()
+			ctrl.finish(true, nil)
+		})
+	}
+
+	return ctrl
 }
 
 type cancelReporter struct {
-	TestHelper
+	t      TestHelper
 	cancel func()
 }
 
 func (r *cancelReporter) Errorf(format string, args ...interface{}) {
-	r.TestHelper.Errorf(format, args...)
+	r.t.Errorf(format, args...)
 }
 func (r *cancelReporter) Fatalf(format string, args ...interface{}) {
 	defer r.cancel()
-	r.TestHelper.Fatalf(format, args...)
+	r.t.Fatalf(format, args...)
+}
+
+func (r *cancelReporter) Helper() {
+	r.t.Helper()
 }
 
 // WithContext returns a new Controller and a Context, which is cancelled on any
@@ -145,15 +165,22 @@ func (r *cancelReporter) Fatalf(format string, args ...interface{}) {
 func WithContext(ctx context.Context, t TestReporter) (*Controller, context.Context) {
 	h, ok := t.(TestHelper)
 	if !ok {
-		h = nopTestHelper{t}
+		h = &nopTestHelper{t: t}
 	}
 
 	ctx, cancel := context.WithCancel(ctx)
-	return NewController(&cancelReporter{h, cancel}), ctx
+	return NewController(&cancelReporter{t: h, cancel: cancel}), ctx
 }
 
 type nopTestHelper struct {
-	TestReporter
+	t TestReporter
+}
+
+func (h *nopTestHelper) Errorf(format string, args ...interface{}) {
+	h.t.Errorf(format, args...)
+}
+func (h *nopTestHelper) Fatalf(format string, args ...interface{}) {
+	h.t.Fatalf(format, args...)
 }
 
 func (h nopTestHelper) Helper() {}
@@ -197,7 +224,10 @@ func (ctrl *Controller) Call(receiver interface{}, method string, args ...interf
 
 		expected, err := ctrl.expectedCalls.FindMatch(receiver, method, args)
 		if err != nil {
-			origin := callerInfo(2)
+			// callerInfo's skip should be updated if the number of calls between the user's test
+			// and this line changes, i.e. this code is wrapped in another anonymous function.
+			// 0 is us, 1 is controller.Call(), 2 is the generated mock, and 3 is the user's test.
+			origin := callerInfo(3)
 			ctrl.T.Fatalf("Unexpected call to %T.%v(%v) at %s because: %s", receiver, method, args, origin, err)
 		}
 
@@ -230,20 +260,29 @@ func (ctrl *Controller) Call(receiver interface{}, method string, args ...interf
 // were called. It should be invoked for each Controller. It is not idempotent
 // and therefore can only be invoked once.
 func (ctrl *Controller) Finish() {
+	// If we're currently panicking, probably because this is a deferred call.
+	// This must be recovered in the deferred function.
+	err := recover()
+	ctrl.finish(false, err)
+}
+
+func (ctrl *Controller) finish(cleanup bool, panicErr interface{}) {
 	ctrl.T.Helper()
 
 	ctrl.mu.Lock()
 	defer ctrl.mu.Unlock()
 
 	if ctrl.finished {
-		ctrl.T.Fatalf("Controller.Finish was called more than once. It has to be called exactly once.")
+		if _, ok := isCleanuper(ctrl.T); !ok {
+			ctrl.T.Fatalf("Controller.Finish was called more than once. It has to be called exactly once.")
+		}
+		return
 	}
 	ctrl.finished = true
 
-	// If we're currently panicking, probably because this is a deferred call,
-	// pass through the panic.
-	if err := recover(); err != nil {
-		panic(err)
+	// Short-circuit, pass through the panic.
+	if panicErr != nil {
+		panic(panicErr)
 	}
 
 	// Check that all remaining expected calls are satisfied.
@@ -252,13 +291,43 @@ func (ctrl *Controller) Finish() {
 		ctrl.T.Errorf("missing call(s) to %v", call)
 	}
 	if len(failures) != 0 {
-		ctrl.T.Fatalf("aborting test due to missing call(s)")
+		if !cleanup {
+			ctrl.T.Fatalf("aborting test due to missing call(s)")
+			return
+		}
+		ctrl.T.Errorf("aborting test due to missing call(s)")
 	}
 }
 
+// callerInfo returns the file:line of the call site. skip is the number
+// of stack frames to skip when reporting. 0 is callerInfo's call site.
 func callerInfo(skip int) string {
 	if _, file, line, ok := runtime.Caller(skip + 1); ok {
 		return fmt.Sprintf("%s:%d", file, line)
 	}
 	return "unknown file"
 }
+
+// isCleanuper checks it if t's base TestReporter has a Cleanup method.
+func isCleanuper(t TestReporter) (cleanuper, bool) {
+	tr := unwrapTestReporter(t)
+	c, ok := tr.(cleanuper)
+	return c, ok
+}
+
+// unwrapTestReporter unwraps TestReporter to the base implementation.
+func unwrapTestReporter(t TestReporter) TestReporter {
+	tr := t
+	switch nt := t.(type) {
+	case *cancelReporter:
+		tr = nt.t
+		if h, check := tr.(*nopTestHelper); check {
+			tr = h.t
+		}
+	case *nopTestHelper:
+		tr = nt.t
+	default:
+		// not wrapped
+	}
+	return tr
+}
diff --git a/vendor/github.com/golang/mock/gomock/matchers.go b/vendor/github.com/golang/mock/gomock/matchers.go
index 7bfc07be..770aba5a 100644
--- a/vendor/github.com/golang/mock/gomock/matchers.go
+++ b/vendor/github.com/golang/mock/gomock/matchers.go
@@ -102,7 +102,21 @@ type eqMatcher struct {
 }
 
 func (e eqMatcher) Matches(x interface{}) bool {
-	return reflect.DeepEqual(e.x, x)
+	// In case, some value is nil
+	if e.x == nil || x == nil {
+		return reflect.DeepEqual(e.x, x)
+	}
+
+	// Check if types assignable and convert them to common type
+	x1Val := reflect.ValueOf(e.x)
+	x2Val := reflect.ValueOf(x)
+
+	if x1Val.Type().AssignableTo(x2Val.Type()) {
+		x1ValConverted := x1Val.Convert(x2Val.Type())
+		return reflect.DeepEqual(x1ValConverted.Interface(), x2Val.Interface())
+	}
+
+	return false
 }
 
 func (e eqMatcher) String() string {
@@ -245,7 +259,7 @@ func Not(x interface{}) Matcher {
 //   AssignableToTypeOf(s).Matches(time.Second) // returns true
 //   AssignableToTypeOf(s).Matches(99) // returns false
 //
-//   var ctx = reflect.TypeOf((*context.Context)).Elem()
+//   var ctx = reflect.TypeOf((*context.Context)(nil)).Elem()
 //   AssignableToTypeOf(ctx).Matches(context.Background()) // returns true
 func AssignableToTypeOf(x interface{}) Matcher {
 	if xt, ok := x.(reflect.Type); ok {
diff --git a/vendor/google.golang.org/grpc/.travis.yml b/vendor/google.golang.org/grpc/.travis.yml
deleted file mode 100644
index 5847d94e..00000000
--- a/vendor/google.golang.org/grpc/.travis.yml
+++ /dev/null
@@ -1,42 +0,0 @@
-language: go
-
-matrix:
-  include:
-  - go: 1.14.x
-    env: VET=1 GO111MODULE=on
-  - go: 1.14.x
-    env: RACE=1 GO111MODULE=on
-  - go: 1.14.x
-    env: RUN386=1
-  - go: 1.14.x
-    env: GRPC_GO_RETRY=on
-  - go: 1.14.x
-    env: TESTEXTRAS=1
-  - go: 1.13.x
-    env: GO111MODULE=on
-  - go: 1.12.x
-    env: GO111MODULE=on
-  - go: 1.11.x  # Keep until interop tests no longer require Go1.11
-    env: GO111MODULE=on
-
-go_import_path: google.golang.org/grpc
-
-before_install:
-  - if [[ "${GO111MODULE}" = "on" ]]; then mkdir "${HOME}/go"; export GOPATH="${HOME}/go"; fi
-  - if [[ -n "${RUN386}" ]]; then export GOARCH=386; fi
-  - if [[ "${TRAVIS_EVENT_TYPE}" = "cron" && -z "${RUN386}" ]]; then RACE=1; fi
-  - if [[ "${TRAVIS_EVENT_TYPE}" != "cron" ]]; then export VET_SKIP_PROTO=1; fi
-
-install:
-  - try3() { eval "$*" || eval "$*" || eval "$*"; }
-  - try3 'if [[ "${GO111MODULE}" = "on" ]]; then go mod download; else make testdeps; fi'
-  - if [[ -n "${GAE}" ]]; then source ./install_gae.sh; make testappenginedeps; fi
-  - if [[ -n "${VET}" ]]; then ./vet.sh -install; fi
-
-script:
-  - set -e
-  - if [[ -n "${TESTEXTRAS}" ]]; then examples/examples_test.sh; security/advancedtls/examples/examples_test.sh; interop/interop_test.sh; make testsubmodule; exit 0; fi
-  - if [[ -n "${VET}" ]]; then ./vet.sh; fi
-  - if [[ -n "${GAE}" ]]; then make testappengine; exit 0; fi
-  - if [[ -n "${RACE}" ]]; then make testrace; exit 0; fi
-  - make test
diff --git a/vendor/google.golang.org/grpc/README.md b/vendor/google.golang.org/grpc/README.md
index 3949a683..0e6ae69a 100644
--- a/vendor/google.golang.org/grpc/README.md
+++ b/vendor/google.golang.org/grpc/README.md
@@ -136,6 +136,6 @@ errors.
 [Go module]: https://github.com/golang/go/wiki/Modules
 [gRPC]: https://grpc.io
 [Go gRPC docs]: https://grpc.io/docs/languages/go
-[Performance benchmark]: https://performance-dot-grpc-testing.appspot.com/explore?dashboard=5652536396611584&widget=490377658&container=1286539696
+[Performance benchmark]: https://performance-dot-grpc-testing.appspot.com/explore?dashboard=5180705743044608
 [quick start]: https://grpc.io/docs/languages/go/quickstart
 [go-releases]: https://golang.org/doc/devel/release.html
diff --git a/vendor/google.golang.org/grpc/balancer_conn_wrappers.go b/vendor/google.golang.org/grpc/balancer_conn_wrappers.go
index 4cc7f915..dd839796 100644
--- a/vendor/google.golang.org/grpc/balancer_conn_wrappers.go
+++ b/vendor/google.golang.org/grpc/balancer_conn_wrappers.go
@@ -43,7 +43,8 @@ type ccBalancerWrapper struct {
 	cc         *ClientConn
 	balancerMu sync.Mutex // synchronizes calls to the balancer
 	balancer   balancer.Balancer
-	scBuffer   *buffer.Unbounded
+	updateCh   *buffer.Unbounded
+	closed     *grpcsync.Event
 	done       *grpcsync.Event
 
 	mu       sync.Mutex
@@ -53,7 +54,8 @@ type ccBalancerWrapper struct {
 func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.BuildOptions) *ccBalancerWrapper {
 	ccb := &ccBalancerWrapper{
 		cc:       cc,
-		scBuffer: buffer.NewUnbounded(),
+		updateCh: buffer.NewUnbounded(),
+		closed:   grpcsync.NewEvent(),
 		done:     grpcsync.NewEvent(),
 		subConns: make(map[*acBalancerWrapper]struct{}),
 	}
@@ -67,35 +69,53 @@ func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.Bui
 func (ccb *ccBalancerWrapper) watcher() {
 	for {
 		select {
-		case t := <-ccb.scBuffer.Get():
-			ccb.scBuffer.Load()
-			if ccb.done.HasFired() {
+		case t := <-ccb.updateCh.Get():
+			ccb.updateCh.Load()
+			if ccb.closed.HasFired() {
 				break
 			}
-			ccb.balancerMu.Lock()
-			su := t.(*scStateUpdate)
-			ccb.balancer.UpdateSubConnState(su.sc, balancer.SubConnState{ConnectivityState: su.state, ConnectionError: su.err})
-			ccb.balancerMu.Unlock()
-		case <-ccb.done.Done():
+			switch u := t.(type) {
+			case *scStateUpdate:
+				ccb.balancerMu.Lock()
+				ccb.balancer.UpdateSubConnState(u.sc, balancer.SubConnState{ConnectivityState: u.state, ConnectionError: u.err})
+				ccb.balancerMu.Unlock()
+			case *acBalancerWrapper:
+				ccb.mu.Lock()
+				if ccb.subConns != nil {
+					delete(ccb.subConns, u)
+					ccb.cc.removeAddrConn(u.getAddrConn(), errConnDrain)
+				}
+				ccb.mu.Unlock()
+			default:
+				logger.Errorf("ccBalancerWrapper.watcher: unknown update %+v, type %T", t, t)
+			}
+		case <-ccb.closed.Done():
 		}
 
-		if ccb.done.HasFired() {
+		if ccb.closed.HasFired() {
+			ccb.balancerMu.Lock()
 			ccb.balancer.Close()
+			ccb.balancerMu.Unlock()
 			ccb.mu.Lock()
 			scs := ccb.subConns
 			ccb.subConns = nil
 			ccb.mu.Unlock()
+			ccb.UpdateState(balancer.State{ConnectivityState: connectivity.Connecting, Picker: nil})
+			ccb.done.Fire()
+			// Fire done before removing the addr conns.  We can safely unblock
+			// ccb.close and allow the removeAddrConns to happen
+			// asynchronously.
 			for acbw := range scs {
 				ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain)
 			}
-			ccb.UpdateState(balancer.State{ConnectivityState: connectivity.Connecting, Picker: nil})
 			return
 		}
 	}
 }
 
 func (ccb *ccBalancerWrapper) close() {
-	ccb.done.Fire()
+	ccb.closed.Fire()
+	<-ccb.done.Done()
 }
 
 func (ccb *ccBalancerWrapper) handleSubConnStateChange(sc balancer.SubConn, s connectivity.State, err error) {
@@ -109,7 +129,7 @@ func (ccb *ccBalancerWrapper) handleSubConnStateChange(sc balancer.SubConn, s co
 	if sc == nil {
 		return
 	}
-	ccb.scBuffer.Put(&scStateUpdate{
+	ccb.updateCh.Put(&scStateUpdate{
 		sc:    sc,
 		state: s,
 		err:   err,
@@ -150,17 +170,10 @@ func (ccb *ccBalancerWrapper) NewSubConn(addrs []resolver.Address, opts balancer
 }
 
 func (ccb *ccBalancerWrapper) RemoveSubConn(sc balancer.SubConn) {
-	acbw, ok := sc.(*acBalancerWrapper)
-	if !ok {
-		return
-	}
-	ccb.mu.Lock()
-	defer ccb.mu.Unlock()
-	if ccb.subConns == nil {
-		return
-	}
-	delete(ccb.subConns, acbw)
-	ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain)
+	// The RemoveSubConn() is handled in the run() goroutine, to avoid deadlock
+	// during switchBalancer() if the old balancer calls RemoveSubConn() in its
+	// Close().
+	ccb.updateCh.Put(sc)
 }
 
 func (ccb *ccBalancerWrapper) UpdateAddresses(sc balancer.SubConn, addrs []resolver.Address) {
diff --git a/vendor/google.golang.org/grpc/clientconn.go b/vendor/google.golang.org/grpc/clientconn.go
index 24109264..b2bccfed 100644
--- a/vendor/google.golang.org/grpc/clientconn.go
+++ b/vendor/google.golang.org/grpc/clientconn.go
@@ -711,7 +711,12 @@ func (cc *ClientConn) switchBalancer(name string) {
 		return
 	}
 	if cc.balancerWrapper != nil {
+		// Don't hold cc.mu while closing the balancers. The balancers may call
+		// methods that require cc.mu (e.g. cc.NewSubConn()). Holding the mutex
+		// would cause a deadlock in that case.
+		cc.mu.Unlock()
 		cc.balancerWrapper.close()
+		cc.mu.Lock()
 	}
 
 	builder := balancer.Get(name)
@@ -1046,12 +1051,12 @@ func (cc *ClientConn) Close() error {
 
 	cc.blockingpicker.close()
 
-	if rWrapper != nil {
-		rWrapper.close()
-	}
 	if bWrapper != nil {
 		bWrapper.close()
 	}
+	if rWrapper != nil {
+		rWrapper.close()
+	}
 
 	for ac := range conns {
 		ac.tearDown(ErrClientConnClosing)
@@ -1424,26 +1429,14 @@ func (ac *addrConn) resetConnectBackoff() {
 	ac.mu.Unlock()
 }
 
-// getReadyTransport returns the transport if ac's state is READY.
-// Otherwise it returns nil, false.
-// If ac's state is IDLE, it will trigger ac to connect.
-func (ac *addrConn) getReadyTransport() (transport.ClientTransport, bool) {
+// getReadyTransport returns the transport if ac's state is READY or nil if not.
+func (ac *addrConn) getReadyTransport() transport.ClientTransport {
 	ac.mu.Lock()
-	if ac.state == connectivity.Ready && ac.transport != nil {
-		t := ac.transport
-		ac.mu.Unlock()
-		return t, true
-	}
-	var idle bool
-	if ac.state == connectivity.Idle {
-		idle = true
-	}
-	ac.mu.Unlock()
-	// Trigger idle ac to connect.
-	if idle {
-		ac.connect()
+	defer ac.mu.Unlock()
+	if ac.state == connectivity.Ready {
+		return ac.transport
 	}
-	return nil, false
+	return nil
 }
 
 // tearDown starts to tear down the addrConn.
diff --git a/vendor/google.golang.org/grpc/go.mod b/vendor/google.golang.org/grpc/go.mod
index b177cfa6..2f2cf1eb 100644
--- a/vendor/google.golang.org/grpc/go.mod
+++ b/vendor/google.golang.org/grpc/go.mod
@@ -3,15 +3,16 @@ module google.golang.org/grpc
 go 1.11
 
 require (
+	github.com/cespare/xxhash v1.1.0
 	github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403
-	github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d
+	github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	github.com/golang/protobuf v1.4.2
+	github.com/golang/protobuf v1.4.3
 	github.com/google/go-cmp v0.5.0
 	github.com/google/uuid v1.1.2
-	golang.org/x/net v0.0.0-20190311183353-d8887717615a
-	golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be
-	golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a
+	golang.org/x/net v0.0.0-20200822124328-c89045814202
+	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
+	golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd
 	google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013
 	google.golang.org/protobuf v1.25.0
 )
diff --git a/vendor/google.golang.org/grpc/go.sum b/vendor/google.golang.org/grpc/go.sum
index 24d2976a..372b4ea3 100644
--- a/vendor/google.golang.org/grpc/go.sum
+++ b/vendor/google.golang.org/grpc/go.sum
@@ -1,32 +1,46 @@
-cloud.google.com/go v0.26.0 h1:e0WKqKTd5BnrG8aKH3J3h+QvEIQtSUcf2n5UZ5ZgLtQ=
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0 h1:eOI3/cP2VTU6uZLDYAoic+eyzzB9YyGmJ7eIjl8rOPg=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/census-instrumentation/opencensus-proto v0.2.1 h1:glEXhBS5PSLLv4IXzLA5yPRVX4bilULVyxxbrfOtDAk=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403 h1:cqQfy1jclcSy/FwLjemeg3SR1yaINm74aQyupQ0Bl8M=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
+github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed h1:OZmjad4L3H8ncOIR8rnb5MREYqG8ixi5+WbeUsquF0c=
+github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d h1:QyzYnTnPE15SQyUeqU6qLbWxMkwyAyu+vGksa0b7j00=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0 h1:dulLQAYQFYtG5MTplgNGHWuV2D+OBD+Z8lmDBmbLg+s=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
 github.com/envoyproxy/protoc-gen-validate v0.1.0 h1:EQciDnbrYxy13PgWoY8AqoxGiPrpgBZ1R8UNe3ddc+A=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
 github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
 github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
 github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
 github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
-github.com/golang/protobuf v1.4.2 h1:+Z5KGCizgyZCbGh1KZqA0fcLLkwbsjIzS4aV2v7wJX0=
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
+github.com/golang/protobuf v1.4.3 h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=
+github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
@@ -35,49 +49,66 @@ github.com/google/go-cmp v0.5.0 h1:/QaMHBdZ26BB3SSst0Iwl10Epc+xhTquomWX0oZEB6w=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
+github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
+github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72 h1:qLC7fQah7D6K1B0ujays3HV9gkFtllcxhzImRR7ArPQ=
+github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190311183353-d8887717615a h1:oWX7TPOiFAMXLq8o0ikBYfCJVlRHBcsciT5bXOrH628=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be h1:vEDujvNQGv4jgYKudGeI/+DAX4Jffq6hpD55MmoEvKs=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20200822124328-c89045814202 h1:VvcQYSHwXgi7W+TpUR6A9g6Up98WAHf3f/ulnJ62IyA=
+golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
+golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d h1:TzXSXBo42m9gQenoE3b9BGiEpg5IG2JkU5FkPIawgtw=
+golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd h1:xhmwyvizuTgC2qz7ZlMluP20uW+C3Rm0FD/WLDX8884=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0 h1:/wp5JvzpHIxhs/dumFmF7BXTf3Z+dd4uXta4kVyO508=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 h1:+kGHl1aib/qcwaRi1CbqBZ1rk19r85MNUf8HaBghugY=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
+google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -90,7 +121,8 @@ google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.3 h1:fvjTMHxHEw/mxHbtzPi3JCcKXQRAnQTBRo6YCJSVHKI=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/vendor/google.golang.org/grpc/internal/binarylog/sink.go b/vendor/google.golang.org/grpc/internal/binarylog/sink.go
index 7d7a3056..c2fdd58b 100644
--- a/vendor/google.golang.org/grpc/internal/binarylog/sink.go
+++ b/vendor/google.golang.org/grpc/internal/binarylog/sink.go
@@ -69,7 +69,8 @@ type writerSink struct {
 func (ws *writerSink) Write(e *pb.GrpcLogEntry) error {
 	b, err := proto.Marshal(e)
 	if err != nil {
-		grpclogLogger.Infof("binary logging: failed to marshal proto message: %v", err)
+		grpclogLogger.Errorf("binary logging: failed to marshal proto message: %v", err)
+		return err
 	}
 	hdr := make([]byte, 4)
 	binary.BigEndian.PutUint32(hdr, uint32(len(b)))
@@ -85,24 +86,27 @@ func (ws *writerSink) Write(e *pb.GrpcLogEntry) error {
 func (ws *writerSink) Close() error { return nil }
 
 type bufferedSink struct {
-	mu     sync.Mutex
-	closer io.Closer
-	out    Sink          // out is built on buf.
-	buf    *bufio.Writer // buf is kept for flush.
-
-	writeStartOnce sync.Once
-	writeTicker    *time.Ticker
+	mu             sync.Mutex
+	closer         io.Closer
+	out            Sink          // out is built on buf.
+	buf            *bufio.Writer // buf is kept for flush.
+	flusherStarted bool
+
+	writeTicker *time.Ticker
+	done        chan struct{}
 }
 
 func (fs *bufferedSink) Write(e *pb.GrpcLogEntry) error {
-	// Start the write loop when Write is called.
-	fs.writeStartOnce.Do(fs.startFlushGoroutine)
 	fs.mu.Lock()
+	defer fs.mu.Unlock()
+	if !fs.flusherStarted {
+		// Start the write loop when Write is called.
+		fs.startFlushGoroutine()
+		fs.flusherStarted = true
+	}
 	if err := fs.out.Write(e); err != nil {
-		fs.mu.Unlock()
 		return err
 	}
-	fs.mu.Unlock()
 	return nil
 }
 
@@ -113,7 +117,12 @@ const (
 func (fs *bufferedSink) startFlushGoroutine() {
 	fs.writeTicker = time.NewTicker(bufFlushDuration)
 	go func() {
-		for range fs.writeTicker.C {
+		for {
+			select {
+			case <-fs.done:
+				return
+			case <-fs.writeTicker.C:
+			}
 			fs.mu.Lock()
 			if err := fs.buf.Flush(); err != nil {
 				grpclogLogger.Warningf("failed to flush to Sink: %v", err)
@@ -124,10 +133,12 @@ func (fs *bufferedSink) startFlushGoroutine() {
 }
 
 func (fs *bufferedSink) Close() error {
+	fs.mu.Lock()
+	defer fs.mu.Unlock()
 	if fs.writeTicker != nil {
 		fs.writeTicker.Stop()
 	}
-	fs.mu.Lock()
+	close(fs.done)
 	if err := fs.buf.Flush(); err != nil {
 		grpclogLogger.Warningf("failed to flush to Sink: %v", err)
 	}
@@ -137,7 +148,6 @@ func (fs *bufferedSink) Close() error {
 	if err := fs.out.Close(); err != nil {
 		grpclogLogger.Warningf("failed to close the Sink: %v", err)
 	}
-	fs.mu.Unlock()
 	return nil
 }
 
@@ -155,5 +165,6 @@ func NewBufferedSink(o io.WriteCloser) Sink {
 		closer: o,
 		out:    newWriterSink(bufW),
 		buf:    bufW,
+		done:   make(chan struct{}),
 	}
 }
diff --git a/vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go b/vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go
index 200b115c..740f83c2 100644
--- a/vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go
+++ b/vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go
@@ -31,26 +31,37 @@ var (
 	mu sync.Mutex
 )
 
+// Int implements rand.Int on the grpcrand global source.
+func Int() int {
+	mu.Lock()
+	defer mu.Unlock()
+	return r.Int()
+}
+
 // Int63n implements rand.Int63n on the grpcrand global source.
 func Int63n(n int64) int64 {
 	mu.Lock()
-	res := r.Int63n(n)
-	mu.Unlock()
-	return res
+	defer mu.Unlock()
+	return r.Int63n(n)
 }
 
 // Intn implements rand.Intn on the grpcrand global source.
 func Intn(n int) int {
 	mu.Lock()
-	res := r.Intn(n)
-	mu.Unlock()
-	return res
+	defer mu.Unlock()
+	return r.Intn(n)
 }
 
 // Float64 implements rand.Float64 on the grpcrand global source.
 func Float64() float64 {
 	mu.Lock()
-	res := r.Float64()
-	mu.Unlock()
-	return res
+	defer mu.Unlock()
+	return r.Float64()
+}
+
+// Uint64 implements rand.Uint64 on the grpcrand global source.
+func Uint64() uint64 {
+	mu.Lock()
+	defer mu.Unlock()
+	return r.Uint64()
 }
diff --git a/vendor/google.golang.org/grpc/internal/status/status.go b/vendor/google.golang.org/grpc/internal/status/status.go
index 710223b8..e5c6513e 100644
--- a/vendor/google.golang.org/grpc/internal/status/status.go
+++ b/vendor/google.golang.org/grpc/internal/status/status.go
@@ -97,7 +97,7 @@ func (s *Status) Err() error {
 	if s.Code() == codes.OK {
 		return nil
 	}
-	return &Error{e: s.Proto()}
+	return &Error{s: s}
 }
 
 // WithDetails returns a new status with the provided details messages appended to the status.
@@ -136,19 +136,23 @@ func (s *Status) Details() []interface{} {
 	return details
 }
 
+func (s *Status) String() string {
+	return fmt.Sprintf("rpc error: code = %s desc = %s", s.Code(), s.Message())
+}
+
 // Error wraps a pointer of a status proto. It implements error and Status,
 // and a nil *Error should never be returned by this package.
 type Error struct {
-	e *spb.Status
+	s *Status
 }
 
 func (e *Error) Error() string {
-	return fmt.Sprintf("rpc error: code = %s desc = %s", codes.Code(e.e.GetCode()), e.e.GetMessage())
+	return e.s.String()
 }
 
 // GRPCStatus returns the Status represented by se.
 func (e *Error) GRPCStatus() *Status {
-	return FromProto(e.e)
+	return e.s
 }
 
 // Is implements future error.Is functionality.
@@ -158,5 +162,5 @@ func (e *Error) Is(target error) bool {
 	if !ok {
 		return false
 	}
-	return proto.Equal(e.e, tse.e)
+	return proto.Equal(e.s.s, tse.s.s)
 }
diff --git a/vendor/google.golang.org/grpc/internal/transport/controlbuf.go b/vendor/google.golang.org/grpc/internal/transport/controlbuf.go
index f63a0137..45532f8a 100644
--- a/vendor/google.golang.org/grpc/internal/transport/controlbuf.go
+++ b/vendor/google.golang.org/grpc/internal/transport/controlbuf.go
@@ -296,7 +296,7 @@ type controlBuffer struct {
 	// closed and nilled when transportResponseFrames drops below the
 	// threshold.  Both fields are protected by mu.
 	transportResponseFrames int
-	trfChan                 atomic.Value // *chan struct{}
+	trfChan                 atomic.Value // chan struct{}
 }
 
 func newControlBuffer(done <-chan struct{}) *controlBuffer {
@@ -310,10 +310,10 @@ func newControlBuffer(done <-chan struct{}) *controlBuffer {
 // throttle blocks if there are too many incomingSettings/cleanupStreams in the
 // controlbuf.
 func (c *controlBuffer) throttle() {
-	ch, _ := c.trfChan.Load().(*chan struct{})
+	ch, _ := c.trfChan.Load().(chan struct{})
 	if ch != nil {
 		select {
-		case <-*ch:
+		case <-ch:
 		case <-c.done:
 		}
 	}
@@ -347,8 +347,7 @@ func (c *controlBuffer) executeAndPut(f func(it interface{}) bool, it cbItem) (b
 		if c.transportResponseFrames == maxQueuedTransportResponseFrames {
 			// We are adding the frame that puts us over the threshold; create
 			// a throttling channel.
-			ch := make(chan struct{})
-			c.trfChan.Store(&ch)
+			c.trfChan.Store(make(chan struct{}))
 		}
 	}
 	c.mu.Unlock()
@@ -389,9 +388,9 @@ func (c *controlBuffer) get(block bool) (interface{}, error) {
 				if c.transportResponseFrames == maxQueuedTransportResponseFrames {
 					// We are removing the frame that put us over the
 					// threshold; close and clear the throttling channel.
-					ch := c.trfChan.Load().(*chan struct{})
-					close(*ch)
-					c.trfChan.Store((*chan struct{})(nil))
+					ch := c.trfChan.Load().(chan struct{})
+					close(ch)
+					c.trfChan.Store((chan struct{})(nil))
 				}
 				c.transportResponseFrames--
 			}
@@ -407,7 +406,6 @@ func (c *controlBuffer) get(block bool) (interface{}, error) {
 		select {
 		case <-c.ch:
 		case <-c.done:
-			c.finish()
 			return nil, ErrConnClosing
 		}
 	}
@@ -432,6 +430,14 @@ func (c *controlBuffer) finish() {
 			hdr.onOrphaned(ErrConnClosing)
 		}
 	}
+	// In case throttle() is currently in flight, it needs to be unblocked.
+	// Otherwise, the transport may not close, since the transport is closed by
+	// the reader encountering the connection error.
+	ch, _ := c.trfChan.Load().(chan struct{})
+	if ch != nil {
+		close(ch)
+	}
+	c.trfChan.Store((chan struct{})(nil))
 	c.mu.Unlock()
 }
 
diff --git a/vendor/google.golang.org/grpc/internal/transport/handler_server.go b/vendor/google.golang.org/grpc/internal/transport/handler_server.go
index 05d3871e..1c3459c2 100644
--- a/vendor/google.golang.org/grpc/internal/transport/handler_server.go
+++ b/vendor/google.golang.org/grpc/internal/transport/handler_server.go
@@ -141,9 +141,8 @@ type serverHandlerTransport struct {
 	stats stats.Handler
 }
 
-func (ht *serverHandlerTransport) Close() error {
+func (ht *serverHandlerTransport) Close() {
 	ht.closeOnce.Do(ht.closeCloseChanOnce)
-	return nil
 }
 
 func (ht *serverHandlerTransport) closeCloseChanOnce() { close(ht.closedCh) }
diff --git a/vendor/google.golang.org/grpc/internal/transport/http2_client.go b/vendor/google.golang.org/grpc/internal/transport/http2_client.go
index 48c5e52e..0cd6da1e 100644
--- a/vendor/google.golang.org/grpc/internal/transport/http2_client.go
+++ b/vendor/google.golang.org/grpc/internal/transport/http2_client.go
@@ -24,6 +24,7 @@ import (
 	"io"
 	"math"
 	"net"
+	"net/http"
 	"strconv"
 	"strings"
 	"sync"
@@ -241,7 +242,15 @@ func newHTTP2Client(connectCtx, ctx context.Context, addr resolver.Address, opts
 		// and passed to the credential handshaker. This makes it possible for
 		// address specific arbitrary data to reach the credential handshaker.
 		connectCtx = icredentials.NewClientHandshakeInfoContext(connectCtx, credentials.ClientHandshakeInfo{Attributes: addr.Attributes})
-		conn, authInfo, err = transportCreds.ClientHandshake(connectCtx, addr.ServerName, conn)
+		rawConn := conn
+		// Pull the deadline from the connectCtx, which will be used for
+		// timeouts in the authentication protocol handshake. Can ignore the
+		// boolean as the deadline will return the zero value, which will make
+		// the conn not timeout on I/O operations.
+		deadline, _ := connectCtx.Deadline()
+		rawConn.SetDeadline(deadline)
+		conn, authInfo, err = transportCreds.ClientHandshake(connectCtx, addr.ServerName, rawConn)
+		rawConn.SetDeadline(time.Time{})
 		if err != nil {
 			return nil, connectionErrorf(isTemporary(err), err, "transport: authentication handshake failed: %v", err)
 		}
@@ -399,11 +408,10 @@ func newHTTP2Client(connectCtx, ctx context.Context, addr resolver.Address, opts
 				logger.Errorf("transport: loopyWriter.run returning. Err: %v", err)
 			}
 		}
-		// If it's a connection error, let reader goroutine handle it
-		// since there might be data in the buffers.
-		if _, ok := err.(net.Error); !ok {
-			t.conn.Close()
-		}
+		// Do not close the transport.  Let reader goroutine handle it since
+		// there might be data in the buffers.
+		t.conn.Close()
+		t.controlBuf.finish()
 		close(t.writerDone)
 	}()
 	return t, nil
@@ -608,26 +616,39 @@ func (t *http2Client) getCallAuthData(ctx context.Context, audience string, call
 	return callAuthData, nil
 }
 
-// PerformedIOError wraps an error to indicate IO may have been performed
-// before the error occurred.
-type PerformedIOError struct {
+// NewStreamError wraps an error and reports additional information.
+type NewStreamError struct {
 	Err error
+
+	DoNotRetry  bool
+	PerformedIO bool
 }
 
-// Error implements error.
-func (p PerformedIOError) Error() string {
-	return p.Err.Error()
+func (e NewStreamError) Error() string {
+	return e.Err.Error()
 }
 
 // NewStream creates a stream and registers it into the transport as "active"
-// streams.
+// streams.  All non-nil errors returned will be *NewStreamError.
 func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Stream, err error) {
+	defer func() {
+		if err != nil {
+			nse, ok := err.(*NewStreamError)
+			if !ok {
+				nse = &NewStreamError{Err: err}
+			}
+			if len(t.perRPCCreds) > 0 || callHdr.Creds != nil {
+				// We may have performed I/O in the per-RPC creds callback, so do not
+				// allow transparent retry.
+				nse.PerformedIO = true
+			}
+			err = nse
+		}
+	}()
 	ctx = peer.NewContext(ctx, t.getPeer())
 	headerFields, err := t.createHeaderFields(ctx, callHdr)
 	if err != nil {
-		// We may have performed I/O in the per-RPC creds callback, so do not
-		// allow transparent retry.
-		return nil, PerformedIOError{err}
+		return nil, err
 	}
 	s := t.newStream(ctx, callHdr)
 	cleanup := func(err error) {
@@ -733,7 +754,7 @@ func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Strea
 			break
 		}
 		if hdrListSizeErr != nil {
-			return nil, hdrListSizeErr
+			return nil, &NewStreamError{Err: hdrListSizeErr, DoNotRetry: true}
 		}
 		firstTry = false
 		select {
@@ -878,12 +899,18 @@ func (t *http2Client) Close(err error) {
 	// Append info about previous goaways if there were any, since this may be important
 	// for understanding the root cause for this connection to be closed.
 	_, goAwayDebugMessage := t.GetGoAwayReason()
+
+	var st *status.Status
 	if len(goAwayDebugMessage) > 0 {
-		err = fmt.Errorf("closing transport due to: %v, received prior goaway: %v", err, goAwayDebugMessage)
+		st = status.Newf(codes.Unavailable, "closing transport due to: %v, received prior goaway: %v", err, goAwayDebugMessage)
+		err = st.Err()
+	} else {
+		st = status.New(codes.Unavailable, err.Error())
 	}
+
 	// Notify all active streams.
 	for _, s := range streams {
-		t.closeStream(s, err, false, http2.ErrCodeNo, status.New(codes.Unavailable, err.Error()), nil, false)
+		t.closeStream(s, err, false, http2.ErrCodeNo, st, nil, false)
 	}
 	if t.statsHandler != nil {
 		connEnd := &stats.ConnEnd{
@@ -1221,7 +1248,11 @@ func (t *http2Client) setGoAwayReason(f *http2.GoAwayFrame) {
 			t.goAwayReason = GoAwayTooManyPings
 		}
 	}
-	t.goAwayDebugMessage = fmt.Sprintf("code: %s, debug data: %v", f.ErrCode, string(f.DebugData()))
+	if len(f.DebugData()) == 0 {
+		t.goAwayDebugMessage = fmt.Sprintf("code: %s", f.ErrCode)
+	} else {
+		t.goAwayDebugMessage = fmt.Sprintf("code: %s, debug data: %q", f.ErrCode, string(f.DebugData()))
+	}
 }
 
 func (t *http2Client) GetGoAwayReason() (GoAwayReason, string) {
@@ -1254,11 +1285,124 @@ func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) {
 		return
 	}
 
-	state := &decodeState{}
-	// Initialize isGRPC value to be !initialHeader, since if a gRPC Response-Headers has already been received, then it means that the peer is speaking gRPC and we are in gRPC mode.
-	state.data.isGRPC = !initialHeader
-	if h2code, err := state.decodeHeader(frame); err != nil {
-		t.closeStream(s, err, true, h2code, status.Convert(err), nil, endStream)
+	// frame.Truncated is set to true when framer detects that the current header
+	// list size hits MaxHeaderListSize limit.
+	if frame.Truncated {
+		se := status.New(codes.Internal, "peer header list size exceeded limit")
+		t.closeStream(s, se.Err(), true, http2.ErrCodeFrameSize, se, nil, endStream)
+		return
+	}
+
+	var (
+		// If a gRPC Response-Headers has already been received, then it means
+		// that the peer is speaking gRPC and we are in gRPC mode.
+		isGRPC         = !initialHeader
+		mdata          = make(map[string][]string)
+		contentTypeErr = "malformed header: missing HTTP content-type"
+		grpcMessage    string
+		statusGen      *status.Status
+		recvCompress   string
+		httpStatusCode *int
+		httpStatusErr  string
+		rawStatusCode  = codes.Unknown
+		// headerError is set if an error is encountered while parsing the headers
+		headerError string
+	)
+
+	if initialHeader {
+		httpStatusErr = "malformed header: missing HTTP status"
+	}
+
+	for _, hf := range frame.Fields {
+		switch hf.Name {
+		case "content-type":
+			if _, validContentType := grpcutil.ContentSubtype(hf.Value); !validContentType {
+				contentTypeErr = fmt.Sprintf("transport: received unexpected content-type %q", hf.Value)
+				break
+			}
+			contentTypeErr = ""
+			mdata[hf.Name] = append(mdata[hf.Name], hf.Value)
+			isGRPC = true
+		case "grpc-encoding":
+			recvCompress = hf.Value
+		case "grpc-status":
+			code, err := strconv.ParseInt(hf.Value, 10, 32)
+			if err != nil {
+				se := status.New(codes.Internal, fmt.Sprintf("transport: malformed grpc-status: %v", err))
+				t.closeStream(s, se.Err(), true, http2.ErrCodeProtocol, se, nil, endStream)
+				return
+			}
+			rawStatusCode = codes.Code(uint32(code))
+		case "grpc-message":
+			grpcMessage = decodeGrpcMessage(hf.Value)
+		case "grpc-status-details-bin":
+			var err error
+			statusGen, err = decodeGRPCStatusDetails(hf.Value)
+			if err != nil {
+				headerError = fmt.Sprintf("transport: malformed grpc-status-details-bin: %v", err)
+			}
+		case ":status":
+			if hf.Value == "200" {
+				httpStatusErr = ""
+				statusCode := 200
+				httpStatusCode = &statusCode
+				break
+			}
+
+			c, err := strconv.ParseInt(hf.Value, 10, 32)
+			if err != nil {
+				se := status.New(codes.Internal, fmt.Sprintf("transport: malformed http-status: %v", err))
+				t.closeStream(s, se.Err(), true, http2.ErrCodeProtocol, se, nil, endStream)
+				return
+			}
+			statusCode := int(c)
+			httpStatusCode = &statusCode
+
+			httpStatusErr = fmt.Sprintf(
+				"unexpected HTTP status code received from server: %d (%s)",
+				statusCode,
+				http.StatusText(statusCode),
+			)
+		default:
+			if isReservedHeader(hf.Name) && !isWhitelistedHeader(hf.Name) {
+				break
+			}
+			v, err := decodeMetadataHeader(hf.Name, hf.Value)
+			if err != nil {
+				headerError = fmt.Sprintf("transport: malformed %s: %v", hf.Name, err)
+				logger.Warningf("Failed to decode metadata header (%q, %q): %v", hf.Name, hf.Value, err)
+				break
+			}
+			mdata[hf.Name] = append(mdata[hf.Name], v)
+		}
+	}
+
+	if !isGRPC || httpStatusErr != "" {
+		var code = codes.Internal // when header does not include HTTP status, return INTERNAL
+
+		if httpStatusCode != nil {
+			var ok bool
+			code, ok = HTTPStatusConvTab[*httpStatusCode]
+			if !ok {
+				code = codes.Unknown
+			}
+		}
+		var errs []string
+		if httpStatusErr != "" {
+			errs = append(errs, httpStatusErr)
+		}
+		if contentTypeErr != "" {
+			errs = append(errs, contentTypeErr)
+		}
+		// Verify the HTTP response is a 200.
+		se := status.New(code, strings.Join(errs, "; "))
+		t.closeStream(s, se.Err(), true, http2.ErrCodeProtocol, se, nil, endStream)
+		return
+	}
+
+	if headerError != "" {
+		se := status.New(codes.Internal, headerError)
+		t.closeStream(s, se.Err(), true, http2.ErrCodeProtocol, se, nil, endStream)
 		return
 	}
 
@@ -1293,9 +1437,9 @@ func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) {
 			// These values can be set without any synchronization because
 			// stream goroutine will read it only after seeing a closed
 			// headerChan which we'll close after setting this.
-			s.recvCompress = state.data.encoding
-			if len(state.data.mdata) > 0 {
-				s.header = state.data.mdata
+			s.recvCompress = recvCompress
+			if len(mdata) > 0 {
+				s.header = mdata
 			}
 		} else {
 			// HEADERS frame block carries a Trailers-Only.
@@ -1308,9 +1452,13 @@ func (t *http2Client) operateHeaders(frame *http2.MetaHeadersFrame) {
 		return
 	}
 
+	if statusGen == nil {
+		statusGen = status.New(rawStatusCode, grpcMessage)
+	}
+
 	// if client received END_STREAM from server while stream was still active, send RST_STREAM
 	rst := s.getState() == streamActive
-	t.closeStream(s, io.EOF, rst, http2.ErrCodeNo, state.status(), state.data.mdata, true)
+	t.closeStream(s, io.EOF, rst, http2.ErrCodeNo, statusGen, mdata, true)
 }
 
 // reader runs as a separate goroutine in charge of reading data from network
diff --git a/vendor/google.golang.org/grpc/internal/transport/http2_server.go b/vendor/google.golang.org/grpc/internal/transport/http2_server.go
index 11be5599..e3799d50 100644
--- a/vendor/google.golang.org/grpc/internal/transport/http2_server.go
+++ b/vendor/google.golang.org/grpc/internal/transport/http2_server.go
@@ -102,11 +102,11 @@ type http2Server struct {
 
 	mu sync.Mutex // guard the following
 
-	// drainChan is initialized when drain(...) is called the first time.
+	// drainChan is initialized when Drain() is called the first time.
 	// After which the server writes out the first GoAway(with ID 2^31-1) frame.
 	// Then an independent goroutine will be launched to later send the second GoAway.
 	// During this time we don't want to write another first GoAway(with ID 2^31 -1) frame.
-	// Thus call to drain(...) will be a no-op if drainChan is already initialized since draining is
+	// Thus call to Drain() will be a no-op if drainChan is already initialized since draining is
 	// already underway.
 	drainChan     chan struct{}
 	state         transportState
@@ -125,9 +125,14 @@ type http2Server struct {
 	connectionID uint64
 }
 
-// newHTTP2Server constructs a ServerTransport based on HTTP2. ConnectionError is
-// returned if something goes wrong.
-func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err error) {
+// NewServerTransport creates a http2 transport with conn and configuration
+// options from config.
+//
+// It returns a non-nil transport and a nil error on success. On failure, it
+// returns a non-nil transport and a nil-error. For a special case where the
+// underlying conn gets closed before the client preface could be read, it
+// returns a nil transport and a nil error.
+func NewServerTransport(conn net.Conn, config *ServerConfig) (_ ServerTransport, err error) {
 	writeBufSize := config.WriteBufferSize
 	readBufSize := config.ReadBufferSize
 	maxHeaderListSize := defaultServerMaxHeaderListSize
@@ -266,6 +271,13 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
 	// Check the validity of client preface.
 	preface := make([]byte, len(clientPreface))
 	if _, err := io.ReadFull(t.conn, preface); err != nil {
+		// In deployments where a gRPC server runs behind a cloud load balancer
+		// which performs regular TCP level health checks, the connection is
+		// closed immediately by the latter. Skipping the error here will help
+		// reduce log clutter.
+		if err == io.EOF {
+			return nil, nil
+		}
 		return nil, connectionErrorf(false, err, "transport: http2Server.HandleStreams failed to receive the preface from client: %v", err)
 	}
 	if !bytes.Equal(preface, clientPreface) {
@@ -295,6 +307,7 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
 			}
 		}
 		t.conn.Close()
+		t.controlBuf.finish()
 		close(t.writerDone)
 	}()
 	go t.keepalive()
@@ -304,37 +317,92 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
 // operateHeader takes action on the decoded headers.
 func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(*Stream), traceCtx func(context.Context, string) context.Context) (fatal bool) {
 	streamID := frame.Header().StreamID
-	state := &decodeState{
-		serverSide: true,
-	}
-	if h2code, err := state.decodeHeader(frame); err != nil {
-		if _, ok := status.FromError(err); ok {
-			t.controlBuf.put(&cleanupStream{
-				streamID: streamID,
-				rst:      true,
-				rstCode:  h2code,
-				onWrite:  func() {},
-			})
-		}
+
+	// frame.Truncated is set to true when framer detects that the current header
+	// list size hits MaxHeaderListSize limit.
+	if frame.Truncated {
+		t.controlBuf.put(&cleanupStream{
+			streamID: streamID,
+			rst:      true,
+			rstCode:  http2.ErrCodeFrameSize,
+			onWrite:  func() {},
+		})
 		return false
 	}
 
 	buf := newRecvBuffer()
 	s := &Stream{
-		id:             streamID,
-		st:             t,
-		buf:            buf,
-		fc:             &inFlow{limit: uint32(t.initialWindowSize)},
-		recvCompress:   state.data.encoding,
-		method:         state.data.method,
-		contentSubtype: state.data.contentSubtype,
+		id:  streamID,
+		st:  t,
+		buf: buf,
+		fc:  &inFlow{limit: uint32(t.initialWindowSize)},
+	}
+
+	var (
+		// If a gRPC Response-Headers has already been received, then it means
+		// that the peer is speaking gRPC and we are in gRPC mode.
+		isGRPC     = false
+		mdata      = make(map[string][]string)
+		httpMethod string
+		// headerError is set if an error is encountered while parsing the headers
+		headerError bool
+
+		timeoutSet bool
+		timeout    time.Duration
+	)
+
+	for _, hf := range frame.Fields {
+		switch hf.Name {
+		case "content-type":
+			contentSubtype, validContentType := grpcutil.ContentSubtype(hf.Value)
+			if !validContentType {
+				break
+			}
+			mdata[hf.Name] = append(mdata[hf.Name], hf.Value)
+			s.contentSubtype = contentSubtype
+			isGRPC = true
+		case "grpc-encoding":
+			s.recvCompress = hf.Value
+		case ":method":
+			httpMethod = hf.Value
+		case ":path":
+			s.method = hf.Value
+		case "grpc-timeout":
+			timeoutSet = true
+			var err error
+			if timeout, err = decodeTimeout(hf.Value); err != nil {
+				headerError = true
+			}
+		default:
+			if isReservedHeader(hf.Name) && !isWhitelistedHeader(hf.Name) {
+				break
+			}
+			v, err := decodeMetadataHeader(hf.Name, hf.Value)
+			if err != nil {
+				headerError = true
+				logger.Warningf("Failed to decode metadata header (%q, %q): %v", hf.Name, hf.Value, err)
+				break
+			}
+			mdata[hf.Name] = append(mdata[hf.Name], v)
+		}
 	}
+
+	if !isGRPC || headerError {
+		t.controlBuf.put(&cleanupStream{
+			streamID: streamID,
+			rst:      true,
+			rstCode:  http2.ErrCodeProtocol,
+			onWrite:  func() {},
+		})
+		return false
+	}
+
 	if frame.StreamEnded() {
 		// s is just created by the caller. No lock needed.
 		s.state = streamReadDone
 	}
-	if state.data.timeoutSet {
-		s.ctx, s.cancel = context.WithTimeout(t.ctx, state.data.timeout)
+	if timeoutSet {
+		s.ctx, s.cancel = context.WithTimeout(t.ctx, timeout)
 	} else {
 		s.ctx, s.cancel = context.WithCancel(t.ctx)
 	}
@@ -347,14 +415,14 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 	}
 	s.ctx = peer.NewContext(s.ctx, pr)
 	// Attach the received metadata to the context.
-	if len(state.data.mdata) > 0 {
-		s.ctx = metadata.NewIncomingContext(s.ctx, state.data.mdata)
-	}
-	if state.data.statsTags != nil {
-		s.ctx = stats.SetIncomingTags(s.ctx, state.data.statsTags)
-	}
-	if state.data.statsTrace != nil {
-		s.ctx = stats.SetIncomingTrace(s.ctx, state.data.statsTrace)
+	if len(mdata) > 0 {
+		s.ctx = metadata.NewIncomingContext(s.ctx, mdata)
+		if statsTags := mdata["grpc-tags-bin"]; len(statsTags) > 0 {
+			s.ctx = stats.SetIncomingTags(s.ctx, []byte(statsTags[len(statsTags)-1]))
+		}
+		if statsTrace := mdata["grpc-trace-bin"]; len(statsTrace) > 0 {
+			s.ctx = stats.SetIncomingTrace(s.ctx, []byte(statsTrace[len(statsTrace)-1]))
+		}
 	}
 	t.mu.Lock()
 	if t.state != reachable {
@@ -383,10 +451,10 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 		return true
 	}
 	t.maxStreamID = streamID
-	if state.data.httpMethod != http.MethodPost {
+	if httpMethod != http.MethodPost {
 		t.mu.Unlock()
 		if logger.V(logLevel) {
-			logger.Warningf("transport: http2Server.operateHeaders parsed a :method field: %v which should be POST", state.data.httpMethod)
+			logger.Infof("transport: http2Server.operateHeaders parsed a :method field: %v which should be POST", httpMethod)
 		}
 		t.controlBuf.put(&cleanupStream{
 			streamID: streamID,
@@ -399,7 +467,7 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 	}
 	if t.inTapHandle != nil {
 		var err error
-		if s.ctx, err = t.inTapHandle(s.ctx, &tap.Info{FullMethodName: state.data.method}); err != nil {
+		if s.ctx, err = t.inTapHandle(s.ctx, &tap.Info{FullMethodName: s.method}); err != nil {
 			t.mu.Unlock()
 			if logger.V(logLevel) {
 				logger.Infof("transport: http2Server.operateHeaders got an error from InTapHandle: %v", err)
@@ -437,7 +505,7 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 			LocalAddr:   t.localAddr,
 			Compression: s.recvCompress,
 			WireLength:  int(frame.Header().Length),
-			Header:      metadata.MD(state.data.mdata).Copy(),
+			Header:      metadata.MD(mdata).Copy(),
 		}
 		t.stats.HandleRPC(s.ctx, inHeader)
 	}
@@ -1004,12 +1072,12 @@ func (t *http2Server) keepalive() {
 			if val <= 0 {
 				// The connection has been idle for a duration of keepalive.MaxConnectionIdle or more.
 				// Gracefully close the connection.
-				t.drain(http2.ErrCodeNo, []byte{})
+				t.Drain()
 				return
 			}
 			idleTimer.Reset(val)
 		case <-ageTimer.C:
-			t.drain(http2.ErrCodeNo, []byte{})
+			t.Drain()
 			ageTimer.Reset(t.kp.MaxConnectionAgeGrace)
 			select {
 			case <-ageTimer.C:
@@ -1063,11 +1131,11 @@ func (t *http2Server) keepalive() {
 // Close starts shutting down the http2Server transport.
 // TODO(zhaoq): Now the destruction is not blocked on any pending streams. This
 // could cause some resource issue. Revisit this later.
-func (t *http2Server) Close() error {
+func (t *http2Server) Close() {
 	t.mu.Lock()
 	if t.state == closing {
 		t.mu.Unlock()
-		return errors.New("transport: Close() was already called")
+		return
 	}
 	t.state = closing
 	streams := t.activeStreams
@@ -1075,7 +1143,9 @@ func (t *http2Server) Close() error {
 	t.mu.Unlock()
 	t.controlBuf.finish()
 	close(t.done)
-	err := t.conn.Close()
+	if err := t.conn.Close(); err != nil && logger.V(logLevel) {
+		logger.Infof("transport: error closing conn during Close: %v", err)
+	}
 	if channelz.IsOn() {
 		channelz.RemoveEntry(t.channelzID)
 	}
@@ -1087,7 +1157,6 @@ func (t *http2Server) Close() error {
 		connEnd := &stats.ConnEnd{}
 		t.stats.HandleConn(t.ctx, connEnd)
 	}
-	return err
 }
 
 // deleteStream deletes the stream s from transport's active streams.
@@ -1152,17 +1221,13 @@ func (t *http2Server) RemoteAddr() net.Addr {
 }
 
 func (t *http2Server) Drain() {
-	t.drain(http2.ErrCodeNo, []byte{})
-}
-
-func (t *http2Server) drain(code http2.ErrCode, debugData []byte) {
 	t.mu.Lock()
 	defer t.mu.Unlock()
 	if t.drainChan != nil {
 		return
 	}
 	t.drainChan = make(chan struct{})
-	t.controlBuf.put(&goAway{code: code, debugData: debugData, headsUp: true})
+	t.controlBuf.put(&goAway{code: http2.ErrCodeNo, debugData: []byte{}, headsUp: true})
 }
 
 var goAwayPing = &ping{data: [8]byte{1, 6, 1, 8, 0, 3, 3, 9}}
diff --git a/vendor/google.golang.org/grpc/internal/transport/http_util.go b/vendor/google.golang.org/grpc/internal/transport/http_util.go
index c7dee140..d8247bcd 100644
--- a/vendor/google.golang.org/grpc/internal/transport/http_util.go
+++ b/vendor/google.golang.org/grpc/internal/transport/http_util.go
@@ -39,7 +39,6 @@ import (
 	spb "google.golang.org/genproto/googleapis/rpc/status"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/grpclog"
-	"google.golang.org/grpc/internal/grpcutil"
 	"google.golang.org/grpc/status"
 )
 
@@ -96,53 +95,6 @@ var (
 	logger = grpclog.Component("transport")
 )
 
-type parsedHeaderData struct {
-	encoding string
-	// statusGen caches the stream status received from the trailer the server
-	// sent.  Client side only.  Do not access directly.  After all trailers are
-	// parsed, use the status method to retrieve the status.
-	statusGen *status.Status
-	// rawStatusCode and rawStatusMsg are set from the raw trailer fields and are not
-	// intended for direct access outside of parsing.
-	rawStatusCode *int
-	rawStatusMsg  string
-	httpStatus    *int
-	// Server side only fields.
-	timeoutSet bool
-	timeout    time.Duration
-	method     string
-	httpMethod string
-	// key-value metadata map from the peer.
-	mdata          map[string][]string
-	statsTags      []byte
-	statsTrace     []byte
-	contentSubtype string
-
-	// isGRPC field indicates whether the peer is speaking gRPC (otherwise HTTP).
-	//
-	// We are in gRPC mode (peer speaking gRPC) if:
-	// 	* We are client side and have already received a HEADER frame that indicates gRPC peer.
-	//  * The header contains valid  a content-type, i.e. a string starts with "application/grpc"
-	// And we should handle error specific to gRPC.
-	//
-	// Otherwise (i.e. a content-type string starts without "application/grpc", or does not exist), we
-	// are in HTTP fallback mode, and should handle error specific to HTTP.
-	isGRPC         bool
-	grpcErr        error
-	httpErr        error
-	contentTypeErr string
-}
-
-// decodeState configures decoding criteria and records the decoded data.
-type decodeState struct {
-	// whether decoding on server side or not
-	serverSide bool
-
-	// Records the states during HPACK decoding. It will be filled with info parsed from HTTP HEADERS
-	// frame once decodeHeader function has been invoked and returned.
-	data parsedHeaderData
-}
-
 // isReservedHeader checks whether hdr belongs to HTTP2 headers
 // reserved by gRPC protocol. Any other headers are classified as the
 // user-specified metadata.
@@ -180,14 +132,6 @@ func isWhitelistedHeader(hdr string) bool {
 	}
 }
 
-func (d *decodeState) status() *status.Status {
-	if d.data.statusGen == nil {
-		// No status-details were provided; generate status using code/msg.
-		d.data.statusGen = status.New(codes.Code(int32(*(d.data.rawStatusCode))), d.data.rawStatusMsg)
-	}
-	return d.data.statusGen
-}
-
 const binHdrSuffix = "-bin"
 
 func encodeBinHeader(v []byte) string {
@@ -217,168 +161,16 @@ func decodeMetadataHeader(k, v string) (string, error) {
 	return v, nil
 }
 
-func (d *decodeState) decodeHeader(frame *http2.MetaHeadersFrame) (http2.ErrCode, error) {
-	// frame.Truncated is set to true when framer detects that the current header
-	// list size hits MaxHeaderListSize limit.
-	if frame.Truncated {
-		return http2.ErrCodeFrameSize, status.Error(codes.Internal, "peer header list size exceeded limit")
-	}
-
-	for _, hf := range frame.Fields {
-		d.processHeaderField(hf)
-	}
-
-	if d.data.isGRPC {
-		if d.data.grpcErr != nil {
-			return http2.ErrCodeProtocol, d.data.grpcErr
-		}
-		if d.serverSide {
-			return http2.ErrCodeNo, nil
-		}
-		if d.data.rawStatusCode == nil && d.data.statusGen == nil {
-			// gRPC status doesn't exist.
-			// Set rawStatusCode to be unknown and return nil error.
-			// So that, if the stream has ended this Unknown status
-			// will be propagated to the user.
-			// Otherwise, it will be ignored. In which case, status from
-			// a later trailer, that has StreamEnded flag set, is propagated.
-			code := int(codes.Unknown)
-			d.data.rawStatusCode = &code
-		}
-		return http2.ErrCodeNo, nil
-	}
-
-	// HTTP fallback mode
-	if d.data.httpErr != nil {
-		return http2.ErrCodeProtocol, d.data.httpErr
-	}
-
-	var (
-		code = codes.Internal // when header does not include HTTP status, return INTERNAL
-		ok   bool
-	)
-
-	if d.data.httpStatus != nil {
-		code, ok = HTTPStatusConvTab[*(d.data.httpStatus)]
-		if !ok {
-			code = codes.Unknown
-		}
-	}
-
-	return http2.ErrCodeProtocol, status.Error(code, d.constructHTTPErrMsg())
-}
-
-// constructErrMsg constructs error message to be returned in HTTP fallback mode.
-// Format: HTTP status code and its corresponding message + content-type error message.
-func (d *decodeState) constructHTTPErrMsg() string {
-	var errMsgs []string
-
-	if d.data.httpStatus == nil {
-		errMsgs = append(errMsgs, "malformed header: missing HTTP status")
-	} else {
-		errMsgs = append(errMsgs, fmt.Sprintf("%s: HTTP status code %d", http.StatusText(*(d.data.httpStatus)), *d.data.httpStatus))
-	}
-
-	if d.data.contentTypeErr == "" {
-		errMsgs = append(errMsgs, "transport: missing content-type field")
-	} else {
-		errMsgs = append(errMsgs, d.data.contentTypeErr)
-	}
-
-	return strings.Join(errMsgs, "; ")
-}
-
-func (d *decodeState) addMetadata(k, v string) {
-	if d.data.mdata == nil {
-		d.data.mdata = make(map[string][]string)
+func decodeGRPCStatusDetails(rawDetails string) (*status.Status, error) {
+	v, err := decodeBinHeader(rawDetails)
+	if err != nil {
+		return nil, err
 	}
-	d.data.mdata[k] = append(d.data.mdata[k], v)
-}
-
-func (d *decodeState) processHeaderField(f hpack.HeaderField) {
-	switch f.Name {
-	case "content-type":
-		contentSubtype, validContentType := grpcutil.ContentSubtype(f.Value)
-		if !validContentType {
-			d.data.contentTypeErr = fmt.Sprintf("transport: received the unexpected content-type %q", f.Value)
-			return
-		}
-		d.data.contentSubtype = contentSubtype
-		// TODO: do we want to propagate the whole content-type in the metadata,
-		// or come up with a way to just propagate the content-subtype if it was set?
-		// ie {"content-type": "application/grpc+proto"} or {"content-subtype": "proto"}
-		// in the metadata?
-		d.addMetadata(f.Name, f.Value)
-		d.data.isGRPC = true
-	case "grpc-encoding":
-		d.data.encoding = f.Value
-	case "grpc-status":
-		code, err := strconv.Atoi(f.Value)
-		if err != nil {
-			d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed grpc-status: %v", err)
-			return
-		}
-		d.data.rawStatusCode = &code
-	case "grpc-message":
-		d.data.rawStatusMsg = decodeGrpcMessage(f.Value)
-	case "grpc-status-details-bin":
-		v, err := decodeBinHeader(f.Value)
-		if err != nil {
-			d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err)
-			return
-		}
-		s := &spb.Status{}
-		if err := proto.Unmarshal(v, s); err != nil {
-			d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err)
-			return
-		}
-		d.data.statusGen = status.FromProto(s)
-	case "grpc-timeout":
-		d.data.timeoutSet = true
-		var err error
-		if d.data.timeout, err = decodeTimeout(f.Value); err != nil {
-			d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed time-out: %v", err)
-		}
-	case ":path":
-		d.data.method = f.Value
-	case ":status":
-		code, err := strconv.Atoi(f.Value)
-		if err != nil {
-			d.data.httpErr = status.Errorf(codes.Internal, "transport: malformed http-status: %v", err)
-			return
-		}
-		d.data.httpStatus = &code
-	case "grpc-tags-bin":
-		v, err := decodeBinHeader(f.Value)
-		if err != nil {
-			d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed grpc-tags-bin: %v", err)
-			return
-		}
-		d.data.statsTags = v
-		d.addMetadata(f.Name, string(v))
-	case "grpc-trace-bin":
-		v, err := decodeBinHeader(f.Value)
-		if err != nil {
-			d.data.grpcErr = status.Errorf(codes.Internal, "transport: malformed grpc-trace-bin: %v", err)
-			return
-		}
-		d.data.statsTrace = v
-		d.addMetadata(f.Name, string(v))
-	case ":method":
-		d.data.httpMethod = f.Value
-	default:
-		if isReservedHeader(f.Name) && !isWhitelistedHeader(f.Name) {
-			break
-		}
-		v, err := decodeMetadataHeader(f.Name, f.Value)
-		if err != nil {
-			if logger.V(logLevel) {
-				logger.Errorf("Failed to decode metadata header (%q, %q): %v", f.Name, f.Value, err)
-			}
-			return
-		}
-		d.addMetadata(f.Name, v)
+	st := &spb.Status{}
+	if err = proto.Unmarshal(v, st); err != nil {
+		return nil, err
 	}
+	return status.FromProto(st), nil
 }
 
 type timeoutUnit uint8
diff --git a/vendor/google.golang.org/grpc/internal/transport/networktype/networktype.go b/vendor/google.golang.org/grpc/internal/transport/networktype/networktype.go
index 96967428..7bb53cff 100644
--- a/vendor/google.golang.org/grpc/internal/transport/networktype/networktype.go
+++ b/vendor/google.golang.org/grpc/internal/transport/networktype/networktype.go
@@ -17,7 +17,7 @@
  */
 
 // Package networktype declares the network type to be used in the default
-// dailer. Attribute of a resolver.Address.
+// dialer. Attribute of a resolver.Address.
 package networktype
 
 import (
diff --git a/vendor/google.golang.org/grpc/internal/transport/transport.go b/vendor/google.golang.org/grpc/internal/transport/transport.go
index 6cc1031f..14198126 100644
--- a/vendor/google.golang.org/grpc/internal/transport/transport.go
+++ b/vendor/google.golang.org/grpc/internal/transport/transport.go
@@ -532,12 +532,6 @@ type ServerConfig struct {
 	HeaderTableSize       *uint32
 }
 
-// NewServerTransport creates a ServerTransport with conn or non-nil error
-// if it fails.
-func NewServerTransport(protocol string, conn net.Conn, config *ServerConfig) (ServerTransport, error) {
-	return newHTTP2Server(conn, config)
-}
-
 // ConnectOptions covers all relevant options for communicating with the server.
 type ConnectOptions struct {
 	// UserAgent is the application user agent.
@@ -694,7 +688,7 @@ type ServerTransport interface {
 	// Close tears down the transport. Once it is called, the transport
 	// should not be accessed any more. All the pending streams and their
 	// handlers will be terminated asynchronously.
-	Close() error
+	Close()
 
 	// RemoteAddr returns the remote network address.
 	RemoteAddr() net.Addr
diff --git a/vendor/google.golang.org/grpc/metadata/metadata.go b/vendor/google.golang.org/grpc/metadata/metadata.go
index e4cbea91..3604c781 100644
--- a/vendor/google.golang.org/grpc/metadata/metadata.go
+++ b/vendor/google.golang.org/grpc/metadata/metadata.go
@@ -93,12 +93,16 @@ func (md MD) Copy() MD {
 }
 
 // Get obtains the values for a given key.
+//
+// k is converted to lowercase before searching in md.
 func (md MD) Get(k string) []string {
 	k = strings.ToLower(k)
 	return md[k]
 }
 
 // Set sets the value of a given key with a slice of values.
+//
+// k is converted to lowercase before storing in md.
 func (md MD) Set(k string, vals ...string) {
 	if len(vals) == 0 {
 		return
@@ -107,7 +111,10 @@ func (md MD) Set(k string, vals ...string) {
 	md[k] = vals
 }
 
-// Append adds the values to key k, not overwriting what was already stored at that key.
+// Append adds the values to key k, not overwriting what was already stored at
+// that key.
+//
+// k is converted to lowercase before storing in md.
 func (md MD) Append(k string, vals ...string) {
 	if len(vals) == 0 {
 		return
@@ -116,9 +123,17 @@ func (md MD) Append(k string, vals ...string) {
 	md[k] = append(md[k], vals...)
 }
 
+// Delete removes the values for a given key k which is converted to lowercase
+// before removing it from md.
+func (md MD) Delete(k string) {
+	k = strings.ToLower(k)
+	delete(md, k)
+}
+
 // Join joins any number of mds into a single MD.
-// The order of values for each key is determined by the order in which
-// the mds containing those values are presented to Join.
+//
+// The order of values for each key is determined by the order in which the mds
+// containing those values are presented to Join.
 func Join(mds ...MD) MD {
 	out := MD{}
 	for _, md := range mds {
@@ -145,8 +160,8 @@ func NewOutgoingContext(ctx context.Context, md MD) context.Context {
 }
 
 // AppendToOutgoingContext returns a new context with the provided kv merged
-// with any existing metadata in the context. Please refer to the
-// documentation of Pairs for a description of kv.
+// with any existing metadata in the context. Please refer to the documentation
+// of Pairs for a description of kv.
 func AppendToOutgoingContext(ctx context.Context, kv ...string) context.Context {
 	if len(kv)%2 == 1 {
 		panic(fmt.Sprintf("metadata: AppendToOutgoingContext got an odd number of input pairs for metadata: %d", len(kv)))
@@ -159,20 +174,34 @@ func AppendToOutgoingContext(ctx context.Context, kv ...string) context.Context
 	return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md.md, added: added})
 }
 
-// FromIncomingContext returns the incoming metadata in ctx if it exists.  The
-// returned MD should not be modified. Writing to it may cause races.
-// Modification should be made to copies of the returned MD.
-func FromIncomingContext(ctx context.Context) (md MD, ok bool) {
-	md, ok = ctx.Value(mdIncomingKey{}).(MD)
-	return
+// FromIncomingContext returns the incoming metadata in ctx if it exists.
+//
+// All keys in the returned MD are lowercase.
+func FromIncomingContext(ctx context.Context) (MD, bool) {
+	md, ok := ctx.Value(mdIncomingKey{}).(MD)
+	if !ok {
+		return nil, false
+	}
+	out := MD{}
+	for k, v := range md {
+		// We need to manually convert all keys to lower case, because MD is a
+		// map, and there's no guarantee that the MD attached to the context is
+		// created using our helper functions.
+		key := strings.ToLower(k)
+		out[key] = v
+	}
+	return out, true
 }
 
-// FromOutgoingContextRaw returns the un-merged, intermediary contents
-// of rawMD. Remember to perform strings.ToLower on the keys. The returned
-// MD should not be modified. Writing to it may cause races. Modification
-// should be made to copies of the returned MD.
+// FromOutgoingContextRaw returns the un-merged, intermediary contents of rawMD.
+//
+// Remember to perform strings.ToLower on the keys, for both the returned MD (MD
+// is a map, there's no guarantee it's created using our helper functions) and
+// the extra kv pairs (AppendToOutgoingContext doesn't turn them into
+// lowercase).
 //
-// This is intended for gRPC-internal use ONLY.
+// This is intended for gRPC-internal use ONLY. Users should use
+// FromOutgoingContext instead.
 func FromOutgoingContextRaw(ctx context.Context) (MD, [][]string, bool) {
 	raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD)
 	if !ok {
@@ -182,16 +211,23 @@ func FromOutgoingContextRaw(ctx context.Context) (MD, [][]string, bool) {
 	return raw.md, raw.added, true
 }
 
-// FromOutgoingContext returns the outgoing metadata in ctx if it exists.  The
-// returned MD should not be modified. Writing to it may cause races.
-// Modification should be made to copies of the returned MD.
+// FromOutgoingContext returns the outgoing metadata in ctx if it exists.
+//
+// All keys in the returned MD are lowercase.
 func FromOutgoingContext(ctx context.Context) (MD, bool) {
 	raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD)
 	if !ok {
 		return nil, false
 	}
 
-	out := raw.md.Copy()
+	out := MD{}
+	for k, v := range raw.md {
+		// We need to manually convert all keys to lower case, because MD is a
+		// map, and there's no guarantee that the MD attached to the context is
+		// created using our helper functions.
+		key := strings.ToLower(k)
+		out[key] = v
+	}
 	for _, added := range raw.added {
 		if len(added)%2 == 1 {
 			panic(fmt.Sprintf("metadata: FromOutgoingContext got an odd number of input pairs for metadata: %d", len(added)))
diff --git a/vendor/google.golang.org/grpc/picker_wrapper.go b/vendor/google.golang.org/grpc/picker_wrapper.go
index a58174b6..0878ada9 100644
--- a/vendor/google.golang.org/grpc/picker_wrapper.go
+++ b/vendor/google.golang.org/grpc/picker_wrapper.go
@@ -147,7 +147,7 @@ func (pw *pickerWrapper) pick(ctx context.Context, failfast bool, info balancer.
 			logger.Error("subconn returned from pick is not *acBalancerWrapper")
 			continue
 		}
-		if t, ok := acw.getAddrConn().getReadyTransport(); ok {
+		if t := acw.getAddrConn().getReadyTransport(); t != nil {
 			if channelz.IsOn() {
 				return t, doneChannelzWrapper(acw, pickResult.Done), nil
 			}
diff --git a/vendor/google.golang.org/grpc/resolver_conn_wrapper.go b/vendor/google.golang.org/grpc/resolver_conn_wrapper.go
index 4118de57..2c47cd54 100644
--- a/vendor/google.golang.org/grpc/resolver_conn_wrapper.go
+++ b/vendor/google.golang.org/grpc/resolver_conn_wrapper.go
@@ -39,6 +39,8 @@ type ccResolverWrapper struct {
 	resolver   resolver.Resolver
 	done       *grpcsync.Event
 	curState   resolver.State
+
+	incomingMu sync.Mutex // Synchronizes all the incoming calls.
 }
 
 // newCCResolverWrapper uses the resolver.Builder to build a Resolver and
@@ -90,6 +92,8 @@ func (ccr *ccResolverWrapper) close() {
 }
 
 func (ccr *ccResolverWrapper) UpdateState(s resolver.State) error {
+	ccr.incomingMu.Lock()
+	defer ccr.incomingMu.Unlock()
 	if ccr.done.HasFired() {
 		return nil
 	}
@@ -105,6 +109,8 @@ func (ccr *ccResolverWrapper) UpdateState(s resolver.State) error {
 }
 
 func (ccr *ccResolverWrapper) ReportError(err error) {
+	ccr.incomingMu.Lock()
+	defer ccr.incomingMu.Unlock()
 	if ccr.done.HasFired() {
 		return
 	}
@@ -114,6 +120,8 @@ func (ccr *ccResolverWrapper) ReportError(err error) {
 
 // NewAddress is called by the resolver implementation to send addresses to gRPC.
 func (ccr *ccResolverWrapper) NewAddress(addrs []resolver.Address) {
+	ccr.incomingMu.Lock()
+	defer ccr.incomingMu.Unlock()
 	if ccr.done.HasFired() {
 		return
 	}
@@ -128,6 +136,8 @@ func (ccr *ccResolverWrapper) NewAddress(addrs []resolver.Address) {
 // NewServiceConfig is called by the resolver implementation to send service
 // configs to gRPC.
 func (ccr *ccResolverWrapper) NewServiceConfig(sc string) {
+	ccr.incomingMu.Lock()
+	defer ccr.incomingMu.Unlock()
 	if ccr.done.HasFired() {
 		return
 	}
diff --git a/vendor/google.golang.org/grpc/rpc_util.go b/vendor/google.golang.org/grpc/rpc_util.go
index 6db356fa..87987a2e 100644
--- a/vendor/google.golang.org/grpc/rpc_util.go
+++ b/vendor/google.golang.org/grpc/rpc_util.go
@@ -258,7 +258,8 @@ func (o PeerCallOption) after(c *callInfo, attempt *csAttempt) {
 }
 
 // WaitForReady configures the action to take when an RPC is attempted on broken
-// connections or unreachable servers. If waitForReady is false, the RPC will fail
+// connections or unreachable servers. If waitForReady is false and the
+// connection is in the TRANSIENT_FAILURE state, the RPC will fail
 // immediately. Otherwise, the RPC client will block the call until a
 // connection is available (or the call is canceled or times out) and will
 // retry the call if it fails due to a transient error.  gRPC will not retry if
@@ -828,26 +829,28 @@ func Errorf(c codes.Code, format string, a ...interface{}) error {
 
 // toRPCErr converts an error into an error from the status package.
 func toRPCErr(err error) error {
-	if err == nil || err == io.EOF {
+	switch err {
+	case nil, io.EOF:
 		return err
-	}
-	if err == io.ErrUnexpectedEOF {
+	case context.DeadlineExceeded:
+		return status.Error(codes.DeadlineExceeded, err.Error())
+	case context.Canceled:
+		return status.Error(codes.Canceled, err.Error())
+	case io.ErrUnexpectedEOF:
 		return status.Error(codes.Internal, err.Error())
 	}
-	if _, ok := status.FromError(err); ok {
-		return err
-	}
+
 	switch e := err.(type) {
 	case transport.ConnectionError:
 		return status.Error(codes.Unavailable, e.Desc)
-	default:
-		switch err {
-		case context.DeadlineExceeded:
-			return status.Error(codes.DeadlineExceeded, err.Error())
-		case context.Canceled:
-			return status.Error(codes.Canceled, err.Error())
-		}
+	case *transport.NewStreamError:
+		return toRPCErr(e.Err)
+	}
+
+	if _, ok := status.FromError(err); ok {
+		return err
 	}
+
 	return status.Error(codes.Unknown, err.Error())
 }
 
diff --git a/vendor/google.golang.org/grpc/server.go b/vendor/google.golang.org/grpc/server.go
index 0a151dee..0251f48d 100644
--- a/vendor/google.golang.org/grpc/server.go
+++ b/vendor/google.golang.org/grpc/server.go
@@ -844,10 +844,16 @@ func (s *Server) handleRawConn(lisAddr string, rawConn net.Conn) {
 		// ErrConnDispatched means that the connection was dispatched away from
 		// gRPC; those connections should be left open.
 		if err != credentials.ErrConnDispatched {
-			s.mu.Lock()
-			s.errorf("ServerHandshake(%q) failed: %v", rawConn.RemoteAddr(), err)
-			s.mu.Unlock()
-			channelz.Warningf(logger, s.channelzID, "grpc: Server.Serve failed to complete security handshake from %q: %v", rawConn.RemoteAddr(), err)
+			// In deployments where a gRPC server runs behind a cloud load
+			// balancer which performs regular TCP level health checks, the
+			// connection is closed immediately by the latter. Skipping the
+			// error here will help reduce log clutter.
+			if err != io.EOF {
+				s.mu.Lock()
+				s.errorf("ServerHandshake(%q) failed: %v", rawConn.RemoteAddr(), err)
+				s.mu.Unlock()
+				channelz.Warningf(logger, s.channelzID, "grpc: Server.Serve failed to complete security handshake from %q: %v", rawConn.RemoteAddr(), err)
+			}
 			rawConn.Close()
 		}
 		rawConn.SetDeadline(time.Time{})
@@ -857,6 +863,7 @@ func (s *Server) handleRawConn(lisAddr string, rawConn net.Conn) {
 	// Finish handshaking (HTTP2)
 	st := s.newHTTP2Transport(conn, authInfo)
 	if st == nil {
+		conn.Close()
 		return
 	}
 
@@ -897,7 +904,7 @@ func (s *Server) newHTTP2Transport(c net.Conn, authInfo credentials.AuthInfo) tr
 		MaxHeaderListSize:     s.opts.maxHeaderListSize,
 		HeaderTableSize:       s.opts.headerTableSize,
 	}
-	st, err := transport.NewServerTransport("http2", c, config)
+	st, err := transport.NewServerTransport(c, config)
 	if err != nil {
 		s.mu.Lock()
 		s.errorf("NewServerTransport(%q) failed: %v", c.RemoteAddr(), err)
@@ -1109,22 +1116,24 @@ func chainUnaryServerInterceptors(s *Server) {
 	} else if len(interceptors) == 1 {
 		chainedInt = interceptors[0]
 	} else {
-		chainedInt = func(ctx context.Context, req interface{}, info *UnaryServerInfo, handler UnaryHandler) (interface{}, error) {
-			return interceptors[0](ctx, req, info, getChainUnaryHandler(interceptors, 0, info, handler))
-		}
+		chainedInt = chainUnaryInterceptors(interceptors)
 	}
 
 	s.opts.unaryInt = chainedInt
 }
 
-// getChainUnaryHandler recursively generate the chained UnaryHandler
-func getChainUnaryHandler(interceptors []UnaryServerInterceptor, curr int, info *UnaryServerInfo, finalHandler UnaryHandler) UnaryHandler {
-	if curr == len(interceptors)-1 {
-		return finalHandler
-	}
-
-	return func(ctx context.Context, req interface{}) (interface{}, error) {
-		return interceptors[curr+1](ctx, req, info, getChainUnaryHandler(interceptors, curr+1, info, finalHandler))
+func chainUnaryInterceptors(interceptors []UnaryServerInterceptor) UnaryServerInterceptor {
+	return func(ctx context.Context, req interface{}, info *UnaryServerInfo, handler UnaryHandler) (interface{}, error) {
+		var i int
+		var next UnaryHandler
+		next = func(ctx context.Context, req interface{}) (interface{}, error) {
+			if i == len(interceptors)-1 {
+				return interceptors[i](ctx, req, info, handler)
+			}
+			i++
+			return interceptors[i-1](ctx, req, info, next)
+		}
+		return next(ctx, req)
 	}
 }
 
@@ -1138,7 +1147,9 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
 		if sh != nil {
 			beginTime := time.Now()
 			statsBegin = &stats.Begin{
-				BeginTime: beginTime,
+				BeginTime:      beginTime,
+				IsClientStream: false,
+				IsServerStream: false,
 			}
 			sh.HandleRPC(stream.Context(), statsBegin)
 		}
@@ -1390,22 +1401,24 @@ func chainStreamServerInterceptors(s *Server) {
 	} else if len(interceptors) == 1 {
 		chainedInt = interceptors[0]
 	} else {
-		chainedInt = func(srv interface{}, ss ServerStream, info *StreamServerInfo, handler StreamHandler) error {
-			return interceptors[0](srv, ss, info, getChainStreamHandler(interceptors, 0, info, handler))
-		}
+		chainedInt = chainStreamInterceptors(interceptors)
 	}
 
 	s.opts.streamInt = chainedInt
 }
 
-// getChainStreamHandler recursively generate the chained StreamHandler
-func getChainStreamHandler(interceptors []StreamServerInterceptor, curr int, info *StreamServerInfo, finalHandler StreamHandler) StreamHandler {
-	if curr == len(interceptors)-1 {
-		return finalHandler
-	}
-
-	return func(srv interface{}, ss ServerStream) error {
-		return interceptors[curr+1](srv, ss, info, getChainStreamHandler(interceptors, curr+1, info, finalHandler))
+func chainStreamInterceptors(interceptors []StreamServerInterceptor) StreamServerInterceptor {
+	return func(srv interface{}, ss ServerStream, info *StreamServerInfo, handler StreamHandler) error {
+		var i int
+		var next StreamHandler
+		next = func(srv interface{}, ss ServerStream) error {
+			if i == len(interceptors)-1 {
+				return interceptors[i](srv, ss, info, handler)
+			}
+			i++
+			return interceptors[i-1](srv, ss, info, next)
+		}
+		return next(srv, ss)
 	}
 }
 
@@ -1418,7 +1431,9 @@ func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transp
 	if sh != nil {
 		beginTime := time.Now()
 		statsBegin = &stats.Begin{
-			BeginTime: beginTime,
+			BeginTime:      beginTime,
+			IsClientStream: sd.ClientStreams,
+			IsServerStream: sd.ServerStreams,
 		}
 		sh.HandleRPC(stream.Context(), statsBegin)
 	}
@@ -1521,6 +1536,8 @@ func (s *Server) processStreamingRPC(t transport.ServerTransport, stream *transp
 		}
 	}
 
+	ss.ctx = newContextWithRPCInfo(ss.ctx, false, ss.codec, ss.cp, ss.comp)
+
 	if trInfo != nil {
 		trInfo.tr.LazyLog(&trInfo.firstLine, false)
 	}
@@ -1588,7 +1605,7 @@ func (s *Server) handleStream(t transport.ServerTransport, stream *transport.Str
 			trInfo.tr.SetError()
 		}
 		errDesc := fmt.Sprintf("malformed method name: %q", stream.Method())
-		if err := t.WriteStatus(stream, status.New(codes.ResourceExhausted, errDesc)); err != nil {
+		if err := t.WriteStatus(stream, status.New(codes.Unimplemented, errDesc)); err != nil {
 			if trInfo != nil {
 				trInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{err}}, true)
 				trInfo.tr.SetError()
diff --git a/vendor/google.golang.org/grpc/stats/stats.go b/vendor/google.golang.org/grpc/stats/stats.go
index 63e476ee..a5ebeeb6 100644
--- a/vendor/google.golang.org/grpc/stats/stats.go
+++ b/vendor/google.golang.org/grpc/stats/stats.go
@@ -45,6 +45,10 @@ type Begin struct {
 	BeginTime time.Time
 	// FailFast indicates if this RPC is failfast.
 	FailFast bool
+	// IsClientStream indicates whether the RPC is a client streaming RPC.
+	IsClientStream bool
+	// IsServerStream indicates whether the RPC is a server streaming RPC.
+	IsServerStream bool
 }
 
 // IsClient indicates if the stats information is from client side.
diff --git a/vendor/google.golang.org/grpc/stream.go b/vendor/google.golang.org/grpc/stream.go
index 1f3e70d2..e224af12 100644
--- a/vendor/google.golang.org/grpc/stream.go
+++ b/vendor/google.golang.org/grpc/stream.go
@@ -295,9 +295,11 @@ func newClientStreamWithParams(ctx context.Context, desc *StreamDesc, cc *Client
 		ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method, FailFast: c.failFast})
 		beginTime = time.Now()
 		begin := &stats.Begin{
-			Client:    true,
-			BeginTime: beginTime,
-			FailFast:  c.failFast,
+			Client:         true,
+			BeginTime:      beginTime,
+			FailFast:       c.failFast,
+			IsClientStream: desc.ClientStreams,
+			IsServerStream: desc.ServerStreams,
 		}
 		sh.HandleRPC(ctx, begin)
 	}
@@ -419,12 +421,9 @@ func (a *csAttempt) newStream() error {
 	cs.callHdr.PreviousAttempts = cs.numRetries
 	s, err := a.t.NewStream(cs.ctx, cs.callHdr)
 	if err != nil {
-		if _, ok := err.(transport.PerformedIOError); ok {
-			// Return without converting to an RPC error so retry code can
-			// inspect.
-			return err
-		}
-		return toRPCErr(err)
+		// Return without converting to an RPC error so retry code can
+		// inspect.
+		return err
 	}
 	cs.attempt.s = s
 	cs.attempt.p = &parser{r: s}
@@ -523,19 +522,28 @@ func (cs *clientStream) commitAttempt() {
 // shouldRetry returns nil if the RPC should be retried; otherwise it returns
 // the error that should be returned by the operation.
 func (cs *clientStream) shouldRetry(err error) error {
-	unprocessed := false
 	if cs.attempt.s == nil {
-		pioErr, ok := err.(transport.PerformedIOError)
-		if ok {
-			// Unwrap error.
-			err = toRPCErr(pioErr.Err)
-		} else {
-			unprocessed = true
+		// Error from NewClientStream.
+		nse, ok := err.(*transport.NewStreamError)
+		if !ok {
+			// Unexpected, but assume no I/O was performed and the RPC is not
+			// fatal, so retry indefinitely.
+			return nil
 		}
-		if !ok && !cs.callInfo.failFast {
-			// In the event of a non-IO operation error from NewStream, we
-			// never attempted to write anything to the wire, so we can retry
-			// indefinitely for non-fail-fast RPCs.
+
+		// Unwrap and convert error.
+		err = toRPCErr(nse.Err)
+
+		// Never retry DoNotRetry errors, which indicate the RPC should not be
+		// retried due to max header list size violation, etc.
+		if nse.DoNotRetry {
+			return err
+		}
+
+		// In the event of a non-IO operation error from NewStream, we never
+		// attempted to write anything to the wire, so we can retry
+		// indefinitely.
+		if !nse.PerformedIO {
 			return nil
 		}
 	}
@@ -544,6 +552,7 @@ func (cs *clientStream) shouldRetry(err error) error {
 		return err
 	}
 	// Wait for the trailers.
+	unprocessed := false
 	if cs.attempt.s != nil {
 		<-cs.attempt.s.Done()
 		unprocessed = cs.attempt.s.Unprocessed()
@@ -632,7 +641,7 @@ func (cs *clientStream) shouldRetry(err error) error {
 // Returns nil if a retry was performed and succeeded; error otherwise.
 func (cs *clientStream) retryLocked(lastErr error) error {
 	for {
-		cs.attempt.finish(lastErr)
+		cs.attempt.finish(toRPCErr(lastErr))
 		if err := cs.shouldRetry(lastErr); err != nil {
 			cs.commitAttemptLocked()
 			return err
@@ -659,7 +668,11 @@ func (cs *clientStream) withRetry(op func(a *csAttempt) error, onSuccess func())
 	for {
 		if cs.committed {
 			cs.mu.Unlock()
-			return op(cs.attempt)
+			// toRPCErr is used in case the error from the attempt comes from
+			// NewClientStream, which intentionally doesn't return a status
+			// error to allow for further inspection; all other errors should
+			// already be status errors.
+			return toRPCErr(op(cs.attempt))
 		}
 		a := cs.attempt
 		cs.mu.Unlock()
diff --git a/vendor/google.golang.org/grpc/version.go b/vendor/google.golang.org/grpc/version.go
index bfe5cf88..e3510e10 100644
--- a/vendor/google.golang.org/grpc/version.go
+++ b/vendor/google.golang.org/grpc/version.go
@@ -19,4 +19,4 @@
 package grpc
 
 // Version is the current grpc version.
-const Version = "1.38.0"
+const Version = "1.40.0"
diff --git a/vendor/google.golang.org/grpc/vet.sh b/vendor/google.golang.org/grpc/vet.sh
index 1a0dbd7e..5eaa8b05 100644
--- a/vendor/google.golang.org/grpc/vet.sh
+++ b/vendor/google.golang.org/grpc/vet.sh
@@ -32,26 +32,14 @@ PATH="${HOME}/go/bin:${GOROOT}/bin:${PATH}"
 go version
 
 if [[ "$1" = "-install" ]]; then
-  # Check for module support
-  if go help mod >& /dev/null; then
-    # Install the pinned versions as defined in module tools.
-    pushd ./test/tools
-    go install \
-      golang.org/x/lint/golint \
-      golang.org/x/tools/cmd/goimports \
-      honnef.co/go/tools/cmd/staticcheck \
-      github.com/client9/misspell/cmd/misspell
-    popd
-  else
-    # Ye olde `go get` incantation.
-    # Note: this gets the latest version of all tools (vs. the pinned versions
-    # with Go modules).
-    go get -u \
-      golang.org/x/lint/golint \
-      golang.org/x/tools/cmd/goimports \
-      honnef.co/go/tools/cmd/staticcheck \
-      github.com/client9/misspell/cmd/misspell
-  fi
+  # Install the pinned versions as defined in module tools.
+  pushd ./test/tools
+  go install \
+    golang.org/x/lint/golint \
+    golang.org/x/tools/cmd/goimports \
+    honnef.co/go/tools/cmd/staticcheck \
+    github.com/client9/misspell/cmd/misspell
+  popd
   if [[ -z "${VET_SKIP_PROTO}" ]]; then
     if [[ "${TRAVIS}" = "true" ]]; then
       PROTOBUF_VERSION=3.14.0
diff --git a/vendor/k8s.io/klog/v2/OWNERS b/vendor/k8s.io/klog/v2/OWNERS
index 380e514f..ad5063fd 100644
--- a/vendor/k8s.io/klog/v2/OWNERS
+++ b/vendor/k8s.io/klog/v2/OWNERS
@@ -15,5 +15,5 @@ approvers:
   - tallclair
   - piosz
   - brancz
-  - DirectXMan12
   - lavalamp
+  - serathius
diff --git a/vendor/k8s.io/klog/v2/go.mod b/vendor/k8s.io/klog/v2/go.mod
index eb297b6a..31aefba7 100644
--- a/vendor/k8s.io/klog/v2/go.mod
+++ b/vendor/k8s.io/klog/v2/go.mod
@@ -2,4 +2,4 @@ module k8s.io/klog/v2
 
 go 1.13
 
-require github.com/go-logr/logr v0.4.0
+require github.com/go-logr/logr v1.2.0
diff --git a/vendor/k8s.io/klog/v2/go.sum b/vendor/k8s.io/klog/v2/go.sum
index 5778f817..919fbadb 100644
--- a/vendor/k8s.io/klog/v2/go.sum
+++ b/vendor/k8s.io/klog/v2/go.sum
@@ -1,2 +1,2 @@
-github.com/go-logr/logr v0.4.0 h1:K7/B1jt6fIBQVd4Owv2MqGQClcgf0R266+7C/QjRcLc=
-github.com/go-logr/logr v0.4.0/go.mod h1:z6/tIYblkpsD+a4lm/fGIIU9mZ+XfAiaFtq7xTgseGU=
+github.com/go-logr/logr v1.2.0 h1:QK40JKJyMdUDz+h+xvCsru/bJhvG0UxvePV0ufL/AcE=
+github.com/go-logr/logr v1.2.0/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
diff --git a/vendor/k8s.io/klog/v2/klog.go b/vendor/k8s.io/klog/v2/klog.go
index 1e187f76..45efbb07 100644
--- a/vendor/k8s.io/klog/v2/klog.go
+++ b/vendor/k8s.io/klog/v2/klog.go
@@ -509,7 +509,7 @@ type loggingT struct {
 	addDirHeader bool
 
 	// If set, all output will be redirected unconditionally to the provided logr.Logger
-	logr logr.Logger
+	logr *logr.Logger
 
 	// If true, messages will not be propagated to lower severity log levels
 	oneOutput bool
@@ -698,11 +698,11 @@ func (buf *buffer) someDigits(i, d int) int {
 	return copy(buf.tmp[i:], buf.tmp[j:])
 }
 
-func (l *loggingT) println(s severity, logr logr.Logger, filter LogFilter, args ...interface{}) {
+func (l *loggingT) println(s severity, logger *logr.Logger, filter LogFilter, args ...interface{}) {
 	buf, file, line := l.header(s, 0)
-	// if logr is set, we clear the generated header as we rely on the backing
-	// logr implementation to print headers
-	if logr != nil {
+	// if logger is set, we clear the generated header as we rely on the backing
+	// logger implementation to print headers
+	if logger != nil {
 		l.putBuffer(buf)
 		buf = l.getBuffer()
 	}
@@ -710,18 +710,18 @@ func (l *loggingT) println(s severity, logr logr.Logger, filter LogFilter, args
 		args = filter.Filter(args)
 	}
 	fmt.Fprintln(buf, args...)
-	l.output(s, logr, buf, 0 /* depth */, file, line, false)
+	l.output(s, logger, buf, 0 /* depth */, file, line, false)
 }
 
-func (l *loggingT) print(s severity, logr logr.Logger, filter LogFilter, args ...interface{}) {
-	l.printDepth(s, logr, filter, 1, args...)
+func (l *loggingT) print(s severity, logger *logr.Logger, filter LogFilter, args ...interface{}) {
+	l.printDepth(s, logger, filter, 1, args...)
 }
 
-func (l *loggingT) printDepth(s severity, logr logr.Logger, filter LogFilter, depth int, args ...interface{}) {
+func (l *loggingT) printDepth(s severity, logger *logr.Logger, filter LogFilter, depth int, args ...interface{}) {
 	buf, file, line := l.header(s, depth)
 	// if logr is set, we clear the generated header as we rely on the backing
 	// logr implementation to print headers
-	if logr != nil {
+	if logger != nil {
 		l.putBuffer(buf)
 		buf = l.getBuffer()
 	}
@@ -732,14 +732,14 @@ func (l *loggingT) printDepth(s severity, logr logr.Logger, filter LogFilter, de
 	if buf.Bytes()[buf.Len()-1] != '\n' {
 		buf.WriteByte('\n')
 	}
-	l.output(s, logr, buf, depth, file, line, false)
+	l.output(s, logger, buf, depth, file, line, false)
 }
 
-func (l *loggingT) printf(s severity, logr logr.Logger, filter LogFilter, format string, args ...interface{}) {
+func (l *loggingT) printf(s severity, logger *logr.Logger, filter LogFilter, format string, args ...interface{}) {
 	buf, file, line := l.header(s, 0)
 	// if logr is set, we clear the generated header as we rely on the backing
 	// logr implementation to print headers
-	if logr != nil {
+	if logger != nil {
 		l.putBuffer(buf)
 		buf = l.getBuffer()
 	}
@@ -750,17 +750,17 @@ func (l *loggingT) printf(s severity, logr logr.Logger, filter LogFilter, format
 	if buf.Bytes()[buf.Len()-1] != '\n' {
 		buf.WriteByte('\n')
 	}
-	l.output(s, logr, buf, 0 /* depth */, file, line, false)
+	l.output(s, logger, buf, 0 /* depth */, file, line, false)
 }
 
 // printWithFileLine behaves like print but uses the provided file and line number.  If
 // alsoLogToStderr is true, the log message always appears on standard error; it
 // will also appear in the log file unless --logtostderr is set.
-func (l *loggingT) printWithFileLine(s severity, logr logr.Logger, filter LogFilter, file string, line int, alsoToStderr bool, args ...interface{}) {
+func (l *loggingT) printWithFileLine(s severity, logger *logr.Logger, filter LogFilter, file string, line int, alsoToStderr bool, args ...interface{}) {
 	buf := l.formatHeader(s, file, line)
 	// if logr is set, we clear the generated header as we rely on the backing
 	// logr implementation to print headers
-	if logr != nil {
+	if logger != nil {
 		l.putBuffer(buf)
 		buf = l.getBuffer()
 	}
@@ -771,28 +771,28 @@ func (l *loggingT) printWithFileLine(s severity, logr logr.Logger, filter LogFil
 	if buf.Bytes()[buf.Len()-1] != '\n' {
 		buf.WriteByte('\n')
 	}
-	l.output(s, logr, buf, 2 /* depth */, file, line, alsoToStderr)
+	l.output(s, logger, buf, 2 /* depth */, file, line, alsoToStderr)
 }
 
 // if loggr is specified, will call loggr.Error, otherwise output with logging module.
-func (l *loggingT) errorS(err error, loggr logr.Logger, filter LogFilter, depth int, msg string, keysAndValues ...interface{}) {
+func (l *loggingT) errorS(err error, logger *logr.Logger, filter LogFilter, depth int, msg string, keysAndValues ...interface{}) {
 	if filter != nil {
 		msg, keysAndValues = filter.FilterS(msg, keysAndValues)
 	}
-	if loggr != nil {
-		logr.WithCallDepth(loggr, depth+2).Error(err, msg, keysAndValues...)
+	if logger != nil {
+		logger.WithCallDepth(depth+2).Error(err, msg, keysAndValues...)
 		return
 	}
 	l.printS(err, errorLog, depth+1, msg, keysAndValues...)
 }
 
 // if loggr is specified, will call loggr.Info, otherwise output with logging module.
-func (l *loggingT) infoS(loggr logr.Logger, filter LogFilter, depth int, msg string, keysAndValues ...interface{}) {
+func (l *loggingT) infoS(logger *logr.Logger, filter LogFilter, depth int, msg string, keysAndValues ...interface{}) {
 	if filter != nil {
 		msg, keysAndValues = filter.FilterS(msg, keysAndValues)
 	}
-	if loggr != nil {
-		logr.WithCallDepth(loggr, depth+2).Info(msg, keysAndValues...)
+	if logger != nil {
+		logger.WithCallDepth(depth+2).Info(msg, keysAndValues...)
 		return
 	}
 	l.printS(nil, infoLog, depth+1, msg, keysAndValues...)
@@ -862,11 +862,23 @@ func (rb *redirectBuffer) Write(bytes []byte) (n int, err error) {
 // Use as:
 //   ...
 //   klog.SetLogger(zapr.NewLogger(zapLog))
+//
+// To remove a backing logr implemention, use ClearLogger. Setting an
+// empty logger with SetLogger(logr.Logger{}) does not work.
 func SetLogger(logr logr.Logger) {
 	logging.mu.Lock()
 	defer logging.mu.Unlock()
 
-	logging.logr = logr
+	logging.logr = &logr
+}
+
+// ClearLogger removes a backing logr implementation if one was set earlier
+// with SetLogger.
+func ClearLogger() {
+	logging.mu.Lock()
+	defer logging.mu.Unlock()
+
+	logging.logr = nil
 }
 
 // SetOutput sets the output destination for all severities
@@ -904,7 +916,7 @@ func LogToStderr(stderr bool) {
 }
 
 // output writes the data to the log files and releases the buffer.
-func (l *loggingT) output(s severity, log logr.Logger, buf *buffer, depth int, file string, line int, alsoToStderr bool) {
+func (l *loggingT) output(s severity, log *logr.Logger, buf *buffer, depth int, file string, line int, alsoToStderr bool) {
 	l.mu.Lock()
 	if l.traceLocation.isSet() {
 		if l.traceLocation.match(file, line) {
@@ -916,9 +928,9 @@ func (l *loggingT) output(s severity, log logr.Logger, buf *buffer, depth int, f
 		// TODO: set 'severity' and caller information as structured log info
 		// keysAndValues := []interface{}{"severity", severityName[s], "file", file, "line", line}
 		if s == errorLog {
-			logr.WithCallDepth(l.logr, depth+3).Error(nil, string(data))
+			l.logr.WithCallDepth(depth+3).Error(nil, string(data))
 		} else {
-			logr.WithCallDepth(log, depth+3).Info(string(data))
+			log.WithCallDepth(depth + 3).Info(string(data))
 		}
 	} else if l.toStderr {
 		os.Stderr.Write(data)
@@ -1269,7 +1281,7 @@ func (l *loggingT) setV(pc uintptr) Level {
 // See the documentation of V for more information.
 type Verbose struct {
 	enabled bool
-	logr    logr.Logger
+	logr    *logr.Logger
 	filter  LogFilter
 }
 
@@ -1277,7 +1289,8 @@ func newVerbose(level Level, b bool) Verbose {
 	if logging.logr == nil {
 		return Verbose{b, nil, logging.filter}
 	}
-	return Verbose{b, logging.logr.V(int(level)), logging.filter}
+	v := logging.logr.V(int(level))
+	return Verbose{b, &v, logging.filter}
 }
 
 // V reports whether verbosity at the call site is at least the requested level.
@@ -1315,9 +1328,14 @@ func V(level Level) Verbose {
 		if runtime.Callers(2, logging.pcs[:]) == 0 {
 			return newVerbose(level, false)
 		}
-		v, ok := logging.vmap[logging.pcs[0]]
+		// runtime.Callers returns "return PCs", but we want
+		// to look up the symbolic information for the call,
+		// so subtract 1 from the PC. runtime.CallersFrames
+		// would be cleaner, but allocates.
+		pc := logging.pcs[0] - 1
+		v, ok := logging.vmap[pc]
 		if !ok {
-			v = logging.setV(logging.pcs[0])
+			v = logging.setV(pc)
 		}
 		return newVerbose(level, v >= level)
 	}
@@ -1573,6 +1591,15 @@ func (ref ObjectRef) String() string {
 	return ref.Name
 }
 
+// MarshalLog ensures that loggers with support for structured output will log
+// as a struct by removing the String method via a custom type.
+func (ref ObjectRef) MarshalLog() interface{} {
+	type or ObjectRef
+	return or(ref)
+}
+
+var _ logr.Marshaler = ObjectRef{}
+
 // KMetadata is a subset of the kubernetes k8s.io/apimachinery/pkg/apis/meta/v1.Object interface
 // this interface may expand in the future, but will always be a subset of the
 // kubernetes k8s.io/apimachinery/pkg/apis/meta/v1.Object interface
@@ -1603,3 +1630,20 @@ func KRef(namespace, name string) ObjectRef {
 		Namespace: namespace,
 	}
 }
+
+// KObjs returns slice of ObjectRef from an slice of ObjectMeta
+func KObjs(arg interface{}) []ObjectRef {
+	s := reflect.ValueOf(arg)
+	if s.Kind() != reflect.Slice {
+		return nil
+	}
+	objectRefs := make([]ObjectRef, 0, s.Len())
+	for i := 0; i < s.Len(); i++ {
+		if v, ok := s.Index(i).Interface().(KMetadata); ok {
+			objectRefs = append(objectRefs, KObj(v))
+		} else {
+			return nil
+		}
+	}
+	return objectRefs
+}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 1bd77feb..72a3547b 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -7,9 +7,9 @@ github.com/cespare/xxhash/v2
 # github.com/container-storage-interface/spec v1.5.0
 ## explicit
 github.com/container-storage-interface/spec/lib/go/csi
-# github.com/go-logr/logr v0.4.0
+# github.com/go-logr/logr v1.2.0
 github.com/go-logr/logr
-# github.com/golang/mock v1.4.3
+# github.com/golang/mock v1.5.0
 ## explicit
 github.com/golang/mock/gomock
 # github.com/golang/protobuf v1.5.2
@@ -67,7 +67,7 @@ golang.org/x/text/unicode/bidi
 golang.org/x/text/unicode/norm
 # google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c
 google.golang.org/genproto/googleapis/rpc/status
-# google.golang.org/grpc v1.38.0
+# google.golang.org/grpc v1.40.0
 ## explicit
 google.golang.org/grpc
 google.golang.org/grpc/attributes
@@ -153,6 +153,6 @@ k8s.io/apimachinery/pkg/version
 # k8s.io/component-base v0.22.0
 k8s.io/component-base/metrics
 k8s.io/component-base/version
-# k8s.io/klog/v2 v2.9.0
+# k8s.io/klog/v2 v2.30.0
 ## explicit
 k8s.io/klog/v2