Migrate to CRI container log format #224
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nwneisen
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core/logs.go
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| return nil | ||
| } | ||
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| type Log struct { |
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Instead of creating a fully new type, what do you think about extending the JSONLog type (since this is tied to that struct not moving anyway: https://github.com/moby/moby/blob/6ce5aa1cd5a46e02ffaa3fe0c794642b35601676/daemon/logger/jsonfilelog/jsonlog/jsonlog.go#L8) and keeping the CRIFormat() method on the new type?
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(Also, I think this is a good opportunity to kill IsCRISupportedLogDriver in favor of moving the logic into this file, and perhaps supporting local as well with an interface to different conversion functions.)
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I think that all sounds like a good plan. The only catch I see right now is waiting on those changes to get these tests running again.
What do you think about a comment and issue for a followup PR to replace this new type with JSONLog? I'm also not seeing it exported in the docker API anywhere so that will need to be added.
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It's not in the API types (since it's not visible over the API), but it's in a public (non-internal/) package and specifically, the type is in a minimal github.com/docker/docker/daemon/logger/jsonfilelog/jsonlog package that has no non-std dependencies inside the larger github.com/docker/docker/daemon/logger/jsonfilelog package for exactly this use-case.
I think it should be trivial to extend this PR, but I'm also fine with taking it earlier to unblock tests. In that case, I have a couple objections to the current design, but I'll need a bit more time to get them written out in a coherent way.
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@neersighted Take a look and see what you think. This required me to bump the docker lib a major version but the actual code changes needed were trivial. I pushed them up to make sure CI doesn't find anything.
I'm still thinking this will need to be organized differently. I'd love to hear your thoughts on the current design. I'm not convinced myself that there isn't a better way and I'd love to hear the feedback.
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| @@ -376,7 +377,7 @@ func recoverFromCreationConflictIfNeeded( | |||
| client libdocker.DockerClientInterface, | |||
| createConfig dockertypes.ContainerCreateConfig, | |||
| err error, | |||
| ) (*dockercontainer.ContainerCreateCreatedBody, error) { | |||
| ) (*dockercontainer.CreateResponse, error) { | |||
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Changing to these CreateResponse methods were the changes needed due to updating the docker/docker lib
| return nil | ||
| } | ||
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| type log struct { |
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I'm thinking that it might make sense to put this log structure and its methods in its own file in the libdocker directory. I see this as a "wrapper" around the docker interface and that seems like what that folder is for.. but it doesn't seem like much is in there yet..
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This change makes
cri-dockerdoutput logs in CRI format instead of json-file format. This fixes the #213 and bumps integration test's pinned SHA so they now include these tests.cri-dockerpreviously had no interaction with the container logs. It would only create a symlink from the dockerd output path to the location expected by kube. This change now tails the logs created by dockerd, formats them to CRI, and creates a separate file in the log location expected by kube.