add compatibility for otel 0.21

.github/workflows/ci.yml

@@ -23,15 +23,21 @@ jobs:
       - run: cargo clippy --features=prometheus-0_13
       - run: cargo clippy --features=prometheus-client-0_21
       - run: cargo clippy --features=opentelemetry-0_20
+      - run: cargo clippy --features=opentelemetry-0_21
 
       # Run the tests with each of the different metrics libraries
-      - run: cargo test --features=prometheus-exporter
-      - run: cargo test --features=prometheus-exporter,metrics-0_21
-      - run: cargo test --features=prometheus-exporter,prometheus-0_13
-      - run: cargo test --features=prometheus-exporter,prometheus-client-0_21,exemplars-tracing
-      - run: cargo test --features=prometheus-exporter,prometheus-client-0_21,exemplars-tracing-opentelemetry-0_20
-      - run: cargo test --features=prometheus-exporter,prometheus-client-0_21,exemplars-tracing-opentelemetry-0_21
-      - run: cargo test --features=prometheus-exporter,opentelemetry-0_20
+      - run: cargo test --features=prometheus-exporter-otel-0_20
+      - run: cargo test --features=prometheus-exporter-otel-0_21
+      - run: cargo test --features=prometheus-exporter-otel-0_20,metrics-0_21
+      - run: cargo test --features=prometheus-exporter-otel-0_21,metrics-0_21
+      - run: cargo test --features=prometheus-exporter-otel-0_20,prometheus-0_13
+      - run: cargo test --features=prometheus-exporter-otel-0_21,prometheus-0_13
+      - run: cargo test --features=prometheus-exporter-otel-0_20,prometheus-client-0_21,exemplars-tracing
+      - run: cargo test --features=prometheus-exporter-otel-0_21,prometheus-client-0_21,exemplars-tracing
+      - run: cargo test --features=prometheus-exporter-otel-0_20,prometheus-client-0_21,exemplars-tracing-opentelemetry-0_20
+      - run: cargo test --features=prometheus-exporter-otel-0_20,prometheus-client-0_21,exemplars-tracing-opentelemetry-0_21
+      - run: cargo test --features=prometheus-exporter-otel-0_20,opentelemetry-0_20
+      - run: cargo test --features=prometheus-exporter-otel-0_21,opentelemetry-0_21
 
       # Build the crate using the other optional features
       - run: cargo build --features=metrics-0_21,custom-objective-percentile,custom-objective-latency
@@ -45,6 +51,5 @@ jobs:
       - run: cargo build --package example-full-api
       - run: cargo build --package example-opentelemetry-push
 
-
       # Make sure the docs can be built
       - run: cargo doc --all-features

autometrics/Cargo.toml

@@ -15,7 +15,8 @@ readme = "README.md"
 [features]
 # Metrics backends
 metrics-0_21 = ["dep:metrics"]
-opentelemetry-0_20 = ["opentelemetry-0-20/metrics", "dep:prometheus"]
+opentelemetry-0_20 = ["dep:opentelemetry-0-20", "opentelemetry-0-20/metrics", "dep:prometheus"]
+opentelemetry-0_21 = ["dep:opentelemetry-0-21", "opentelemetry-0-21/metrics", "dep:prometheus"]
 prometheus-0_13 = ["dep:prometheus"]
 prometheus-client-0_21 = ["dep:prometheus-client"]
 
@@ -25,48 +26,59 @@ opentelemetry = ["opentelemetry-0_20"]
 prometheus = ["prometheus-0_13"]
 prometheus-client = ["prometheus-client-0_21"]
 exemplars-tracing-opentelemetry = ["exemplars-tracing-opentelemetry-0_20"]
+prometheus-exporter = ["prometheus-exporter-otel-0_20"]
 
 # Misc
-prometheus-exporter = [
+prometheus-exporter-otel-0_20 = [
+  "prometheus-exporter-parent",
+  "dep:opentelemetry-prometheus-0-13",
+  "dep:opentelemetry-sdk-0-20",
+]
+
+prometheus-exporter-otel-0_21 = [
+  "prometheus-exporter-parent",
+  "dep:opentelemetry-prometheus-0-14",
+  "dep:opentelemetry-sdk-0-21",
+]
+
+prometheus-exporter-parent = [
   "http",
   "metrics-exporter-prometheus",
-  "opentelemetry-prometheus-0-13",
-  "opentelemetry-sdk-0-20",
   "dep:prometheus",
   "dep:prometheus-client",
 ]
 
 otel-push-exporter = [
-  "opentelemetry-sdk-0-20",
-  "dep:opentelemetry-0-20",
-  "opentelemetry-otlp-0-20",
-  "opentelemetry-otlp-0-20/metrics",
-  "opentelemetry-otlp-0-20/tls-roots"
+  "dep:opentelemetry-sdk-0-21",
+  "dep:opentelemetry-0-21",
+  "dep:opentelemetry-otlp-0-21",
+  "opentelemetry-otlp-0-21/metrics",
+  "opentelemetry-otlp-0-21/tls-roots"
 ]
 
 otel-push-exporter-http = [
   "otel-push-exporter",
-  "opentelemetry-otlp-0-20/http-proto"
+  "opentelemetry-otlp-0-21/http-proto"
 ]
 
 otel-push-exporter-grpc = [
   "otel-push-exporter",
-  "opentelemetry-otlp-0-20/grpc-tonic"
+  "opentelemetry-otlp-0-21/grpc-tonic"
 ]
 
 otel-push-exporter-tokio = [
   "otel-push-exporter",
-  "opentelemetry-sdk-0-20/rt-tokio"
+  "opentelemetry-sdk-0-21/rt-tokio"
 ]
 
 otel-push-exporter-tokio-current-thread = [
   "otel-push-exporter",
-  "opentelemetry-sdk-0-20/rt-tokio-current-thread"
+  "opentelemetry-sdk-0-21/rt-tokio-current-thread"
 ]
 
 otel-push-exporter-async-std = [
   "otel-push-exporter",
-  "opentelemetry-sdk-0-20/rt-async-std"
+  "opentelemetry-sdk-0-21/rt-async-std"
 ]
 
 # Exemplars
@@ -77,7 +89,7 @@ exemplars-tracing-opentelemetry-0_20 = [
   "dep:tracing-opentelemetry-0-20",
 ]
 exemplars-tracing-opentelemetry-0_21 = [
-  "opentelemetry-0-20/trace",
+  "opentelemetry-0-20/trace", # yea for some reason they use otel 0.20 with tracing-opentelemetry 0.21. only 0.22 is updated w/ otel 0.21
   "tracing",
   "dep:tracing-opentelemetry-0-21",
 ]
@@ -94,10 +106,18 @@ spez = "0.1.2"
 thiserror = "1"
 
 # Used for opentelemetry feature
+## The opentelemetry_api crate has been incorperated into `opentelemetry` as of v0.21 so the `package` directives are different
 opentelemetry-0-20 = { package = "opentelemetry_api", version = "0.20", default-features = false, optional = true }
-opentelemetry-prometheus-0-13 = { package = "opentelemetry-prometheus", version = "0.13.0", optional = true } # otel 0.20
+opentelemetry-0-21 = { package = "opentelemetry", version = "0.21", default-features = false, optional = true }
+
+opentelemetry-prometheus-0-13 = { package = "opentelemetry-prometheus", version = "0.13", optional = true } # otel 0.20
+opentelemetry-prometheus-0-14 = { package = "opentelemetry-prometheus", version = "0.14", optional = true } # otel 0.21
+
 opentelemetry-sdk-0-20 = { package = "opentelemetry_sdk", version = "0.20", default-features = false, features = ["metrics"], optional = true }
-opentelemetry-otlp-0-20 = { package = "opentelemetry-otlp", version = "0.13.0", default-features = false, optional = true }
+opentelemetry-sdk-0-21 = { package = "opentelemetry_sdk", version = "0.21", default-features = false, features = ["metrics"], optional = true }
+
+opentelemetry-otlp-0-20 = { package = "opentelemetry-otlp", version = "0.13", default-features = false, optional = true }
+opentelemetry-otlp-0-21 = { package = "opentelemetry-otlp", version = "0.14", default-features = false, optional = true }
 
 # Use for metrics feature
 metrics = { version = "0.21", default-features = false, optional = true }

autometrics/build.rs

@@ -6,7 +6,7 @@ pub fn main() {
     #[cfg(feature = "metrics")]
     println!("cargo:warning=The `metrics` feature is deprecated and will be removed in the next version. Please use `metrics-0_21` instead.");
     #[cfg(feature = "opentelemetry")]
-    println!("cargo:warning=The `opentelemetry` feature is deprecated and will be removed in the next version. Please use `opentelemetry-0_20` instead.");
+    println!("cargo:warning=The `opentelemetry` feature is deprecated and will be removed in the next version. Please use `opentelemetry-0_20` or `opentelemetry-0_21` instead.");
     #[cfg(feature = "prometheus")]
     println!("cargo:warning=The `prometheus` feature is deprecated and will be removed in the next version. Please use `prometheus-0_13` instead.");
     #[cfg(feature = "prometheus-client")]
@@ -17,7 +17,7 @@ pub fn main() {
     cfg_aliases! {
       // Backends
       metrics: { any(feature = "metrics", feature = "metrics-0_21") },
-      opentelemetry: { any(feature = "opentelemetry", feature = "opentelemetry-0_20") },
+      opentelemetry: { any(feature = "opentelemetry", feature = "opentelemetry-0_20", feature="opentelemetry-0_21") },
       prometheus: { any(feature = "prometheus", feature = "prometheus-0_13") },
       prometheus_client_feature: { any(feature = "prometheus-client", feature = "prometheus-client-0_21") },
       default_backend: { all(
@@ -27,7 +27,7 @@ pub fn main() {
       prometheus_client: { any(prometheus_client_feature, default_backend) },
 
       // Misc
-      prometheus_exporter: { feature = "prometheus-exporter" },
+      prometheus_exporter: { any(feature = "prometheus-exporter", feature = "prometheus-exporter-otel-0_20", feature = "prometheus-exporter-otel-0_21") },
 
       // Exemplars
       exemplars: { any(exemplars_tracing, exemplars_tracing_opentelemetry) },

autometrics/src/lib.rs

@@ -17,7 +17,11 @@ mod labels;
 pub mod objectives;
 #[cfg(feature = "otel-push-exporter")]
 pub mod otel_push_exporter;
-#[cfg(feature = "prometheus-exporter")]
+#[cfg(any(
+    feature = "prometheus-exporter",
+    feature = "prometheus-exporter-otel-0_20",
+    feature = "prometheus-exporter-otel-0_21"
+))]
 pub mod prometheus_exporter;
 pub mod settings;
 mod task_local;

autometrics/src/prometheus_exporter.rs

@@ -27,8 +27,10 @@ use http::{header::CONTENT_TYPE, Response};
 #[cfg(metrics)]
 use metrics_exporter_prometheus::{BuildError, PrometheusBuilder, PrometheusHandle};
 use once_cell::sync::OnceCell;
-#[cfg(opentelemetry)]
+#[cfg(feature = "opentelemetry-0-20")]
 use opentelemetry_0_20::metrics::MetricsError;
+#[cfg(feature = "opentelemetry-0-21")]
+use opentelemetry_0_21::metrics::MetricsError;
 #[cfg(any(opentelemetry, prometheus))]
 use prometheus::TextEncoder;
 use thiserror::Error;
@@ -210,10 +212,24 @@ fn initialize_prometheus_exporter() -> Result<GlobalPrometheus, ExporterInitiali
 
     #[cfg(opentelemetry)]
     {
-        use opentelemetry_0_20::global;
-        use opentelemetry_prometheus_0_13::exporter;
-        use opentelemetry_sdk_0_20::metrics::reader::AggregationSelector;
-        use opentelemetry_sdk_0_20::metrics::{Aggregation, InstrumentKind, MeterProvider};
+        #[cfg(feature = "opentelemetry-0-20")]
+        use opentelemetry_0_20 as opentelemetry;
+        #[cfg(feature = "opentelemetry-0-20")]
+        use opentelemetry_prometheus_0_13 as opentelemetry_prometheus;
+        #[cfg(feature = "opentelemetry-0-20")]
+        use opentelemetry_sdk_0_20 as opentelemetry_sdk;
+
+        #[cfg(feature = "opentelemetry-0-21")]
+        use opentelemetry_0_21 as opentelemetry;
+        #[cfg(feature = "opentelemetry-0-21")]
+        use opentelemetry_prometheus_0_14 as opentelemetry_prometheus;
+        #[cfg(feature = "opentelemetry-0-21")]
+        use opentelemetry_sdk_0_21 as opentelemetry_sdk;
+
+        use opentelemetry::global;
+        use opentelemetry_prometheus::exporter;
+        use opentelemetry_sdk::metrics::reader::AggregationSelector;
+        use opentelemetry_sdk::metrics::{Aggregation, InstrumentKind, MeterProvider};
 
         /// A custom aggregation selector that uses the configured histogram buckets,
         /// along with the other default aggregation settings.