Avinash Sridharan updated MESOS-6282:
    Target Version/s: 1.2.0  (was: 1.1.0)

> CNI isolator should print plugin's stderr
> -----------------------------------------
>                 Key: MESOS-6282
>                 URL: https://issues.apache.org/jira/browse/MESOS-6282
>             Project: Mesos
>          Issue Type: Improvement
>          Components: containerization, isolation, network
>            Reporter: Dan Osborne
>            Assignee: Avinash Sridharan
> It's quite difficult for both Operators and CNI plugin developers to diagnose 
> CNI plugin errors in production or in test when the only error information 
> available is the stdout error string returned by the plugin (assuming it 
> managed to even print its correctly formatted text to stdout).
> Many CNI plugins print logging information to stderr, [as per the CNI 
> spec|https://github.com/containernetworking/cni/blob/master/SPEC.md#result]:
> bq. In addition, stderr can be used for unstructured output such as logs.
> Therefore, I propose the Mesos CNI Isolator capture the CNI plugin's stderr 
> output and log it to the Agent Logs, for easier diagnosis.

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