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Re: Support for Kubernetes metadata when using docker --log-driver=journald?



Actually, there may be an issue for this already.
https://github.com/kubernetes/kubernetes/issues/15478

On Fri, May 20, 2016 at 12:38 PM, Clayton Coleman <ccoleman redhat com> wrote:
> We could support setting that on the Kubelet when we launch the
> containers.  I think it's reasonable - if you open a Kube issue Derek
> and I can chime in.
>
> On Fri, May 20, 2016 at 12:12 PM, Rich Megginson <rmeggins redhat com> wrote:
>> When using OpenShift with the standard docker log driver, there are
>> container logs in the following format:
>>
>> /var/log/containers/$name_of_pod-$name_of_project-$name_of_container-$containeruuid.log
>>
>> The fluentd log collector uses $name_of_pod and $name_of_project to look up
>> in k8s additional metadata for the pod and project (such as the uuids).
>>
>> When using docker daemon --log-driver=journald, these files no longer exist,
>> and the journal entries are missing $name_of_pod and $name_of_project in the
>> metadata:
>>
>> __CURSOR=s=7c08f275b8a545a9afb1770ef779ebb8;i=3148;b=caa653694cfa4a6ea9e4213e6cf4065b;m=13700ce9;t=53347368f6904;x=770aebf7b30ab7b3
>> __REALTIME_TIMESTAMP=1463755834616068
>> ...
>> _COMM=docker-current
>> _EXE=/usr/bin/docker-current
>> _CMDLINE=/usr/bin/docker-current daemon
>> --authorization-plugin=rhel-push-plugin --selinux-enabled
>> --log-driver=journald
>> CONTAINER_ID=a160de6fe8fa
>> CONTAINER_ID_FULL=a160de6fe8facb49103c45f2bd14854b455b42153b777634ea58fb8a95124a40
>> CONTAINER_NAME=silly_bhaskara
>>
>> When running containers via docker directly, you can use -e and -l to pass
>> additional metadata through to the journal output:
>>   docker run -e FOOT=BALL -l LA=SF --rm --name toasted \
>>       --log-driver=journald --log-opt env=FOOT --log-opt labels=LA \
>>       fedora /bin/pwd
>>
>>  MESSAGE=/
>>  CONTAINER_NAME=toasted
>>  LA=SF
>>  FOOT=BALL
>>  CONTAINER_ID=37772f57b118
>>
>> CONTAINER_ID_FULL=37772f57b1189306fed624675cd33412461a6f04ff0f4d7a4ea5d1d41f637641
>>
>> Is there some way to make k8s and/or OpenShift add fields like
>> K8S_POD_NAME=$name_of_pod and
>> K8S_NAMESPACE_NAME=$name_of_project to the journal entries?
>> This will also be needed by
>> https://github.com/fabric8io/fluent-plugin-kubernetes_metadata_filter which
>> assumes the entries are tagged in a similar format to the filename above.
>> Of course if k8s/openshift can be configured to automatically add that
>> additional metadata to the journal entries then the fluentd k8s metadata
>> plugin might not be needed.
>>
>>
>> _______________________________________________
>> dev mailing list
>> dev lists openshift redhat com
>> http://lists.openshift.redhat.com/openshiftmm/listinfo/dev
>>


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