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Merge pull request #56179 from Random-Liu/fix-fluentd-cri-log-support

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Automatic merge from submit-queue (batch tested with PRs 56115, 55143, 56179). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Do not add new field in fluentd CRI log format.

After https://github.com/kubernetes/kubernetes/pull/55922 is merged, the test `Cluster level logging implemented by Stackdriver should ingest logs` starts to fail in cri-containerd cluster e2e test.
https://k8s-testgrid.appspot.com/sig-node-containerd#e2e-gci

I believe the reason is that the GCP fluentd plugin assumes that there are only `timestamp`, `severity`, `stream` and `log|message|msg` fields in the log entry.

If there is any other fields, GCP fluentd plugin will not try to convert the payload to json, even if the log content is json. The plugin deletes `stream`, `timestamp` and `severity`, then assumes that there is only one field left e13c89a1b6/lib/fluent/plugin/out_google_cloud.rb (L495).

This PR removes the tag field. With this, fluentd GCP plugin should work again.

@yujuhong @crassirostris 
/cc @kubernetes/sig-node-bugs @kubernetes/sig-instrumentation-bugs 
/cc @derekwaynecarr for milestone approve. Thanks!

**Release note**:

```release-note
none
```
This commit is contained in:
Kubernetes Submit Queue 2017-11-22 02:56:28 -08:00 committed by GitHub
commit 997e777c03
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2 changed files with 4 additions and 4 deletions
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4
cluster/addons/fluentd-elasticsearch/fluentd-es-configmap.yaml
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@ -99,7 +99,7 @@ data:
# Json Log Example:
# {"log":"[info:2016-02-16T16:04:05.930-08:00] Some log text here\n","stream":"stdout","time":"2016-02-17T00:04:05.931087621Z"}
# CRI Log Example:
# 2016-02-17T00:04:05.931087621Z stdout [info:2016-02-16T16:04:05.930-08:00] Some log text here
# 2016-02-17T00:04:05.931087621Z stdout F [info:2016-02-16T16:04:05.930-08:00] Some log text here
<source>
type tail
path /var/log/containers/*.log
@ -114,7 +114,7 @@ data:
time_format %Y-%m-%dT%H:%M:%S.%NZ
</pattern>
<pattern>
format /^(?<time>.+) (?<stream>stdout|stderr) (?<tag>.*) (?<log>.*)$/
format /^(?<time>.+) (?<stream>stdout|stderr) [^ ]* (?<log>.*)$/
time_format %Y-%m-%dT%H:%M:%S.%N%:z
</pattern>
</source>

4
cluster/addons/fluentd-gcp/fluentd-gcp-configmap.yaml
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@ -44,7 +44,7 @@ data:
# Json Log Example:
# {"log":"[info:2016-02-16T16:04:05.930-08:00] Some log text here\n","stream":"stdout","time":"2016-02-17T00:04:05.931087621Z"}
# CRI Log Example:
# 2016-02-17T00:04:05.931087621Z stdout [info:2016-02-16T16:04:05.930-08:00] Some log text here
# 2016-02-17T00:04:05.931087621Z stdout F [info:2016-02-16T16:04:05.930-08:00] Some log text here
<source>
type tail
path /var/log/containers/*.log
@ -58,7 +58,7 @@ data:
time_format %Y-%m-%dT%H:%M:%S.%NZ
</pattern>
<pattern>
format /^(?<time>.+) (?<stream>stdout|stderr) (?<tag>.*) (?<log>.*)$/
format /^(?<time>.+) (?<stream>stdout|stderr) [^ ]* (?<log>.*)$/
time_format %Y-%m-%dT%H:%M:%S.%N%:z
</pattern>
</source>