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https://issues.apache.org/jira/browse/FLINK-15794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17046715#comment-17046715
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Niels Basjes commented on FLINK-15794:
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FYI: I've put up an initial pull request for you to review.
> Rethink default value of kubernetes.container.image
> ---------------------------------------------------
>
> Key: FLINK-15794
> URL: https://issues.apache.org/jira/browse/FLINK-15794
> Project: Flink
> Issue Type: Sub-task
> Components: Deployment / Kubernetes
> Affects Versions: 1.10.0
> Reporter: Till Rohrmann
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.10.1, 1.11.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently, the default value of the configuration option
> {{kubernetes.container.image}} is set to {{flink:latest}}. This has the
> effect that we will always start the latest Flink version independent of
> which version we are using to start the Kubernetes cluster.
> I am a bit unsure whether this is a good or not so good behaviour and what
> the user would actually expect to happen. Hence, this issue is more to
> discuss the pros and cons about the current default value and whether we
> should set it to a fixed version.
> One problem I could see is that we are providing some files from the local
> Flink installation which might be incompatible with {{flink:latest}}. E.g. at
> the moment we think about upgrading Flink's log4j dependency to log4j2.
> Log4j2 requires a different configuration file which will most likely replace
> the existing {{log4j.properties}} file in Flink's binary distribution. If we
> now start a K8s session cluster with an older version where we still have the
> old {{log4j.properties}} file, then the logging might not work with a version
> where we are using log4j2. Hence, it might be safer to fix the image version
> or at least do not allow that it uses a different major version and only the
> latest bug fix version.
> If we should decide to fix the version, then we would need to update the
> default value with every major release. If this is the case, then the
> [release
> guide|https://cwiki.apache.org/confluence/display/FLINK/Creating+a+Flink+Release]
> needs to be updated.
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