[jira] [Created] (FLINK-15792) Make Flink logs accessible via kubectl logs per default

[Shang Yuanchun (Jira)]

Till Rohrmann created FLINK-15792:
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             Summary: Make Flink logs accessible via kubectl logs per default
                 Key: FLINK-15792
                 URL: https://issues.apache.org/jira/browse/FLINK-15792
             Project: Flink
          Issue Type: Sub-task
          Components: Deployment / Kubernetes
    Affects Versions: 1.10.0
            Reporter: Till Rohrmann
             Fix For: 1.11.0, 1.10.1


I think we should make Flink's logs accessible via {{kubectl logs}} per default. Firstly, this is the idiomatic way to obtain the logs from a container on Kubernetes. Secondly, especially if something does not work and the container cannot start/stops abruptly, there is no way to log into the container and look for the log.file. This makes debugging the setup quite hard.

I think the best way would be to create the Flink Docker image in such a way that it logs to stdout. In order to allow access to the log file from the web ui, it should also create a log file. One way to achieve this is to add a ConsoleAppender to the respective logging configuration. Another way could be to start the process in the console mode and then to teeing the stdout output into the log file.



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