[jira] [Issue Comment Deleted] (MESOS-6541) Mesos test should mount cgroups_root

["haosdent (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MESOS-6541?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

haosdent updated MESOS-6541:
----------------------------
    Comment: was deleted

(was: We didn't run test cases after {{clone()}} for now and only Linux support this. To make all test cases run an isolated environment, we have used docker in Apache Jenkins CI. I still prefer the current way to make test cases run without {{CLONE_NEWNS}}, it would expose the problem more obviously if Mesos has leak mounts.)

> Mesos test should mount cgroups_root
> ------------------------------------
>
>                 Key: MESOS-6541
>                 URL: https://issues.apache.org/jira/browse/MESOS-6541
>             Project: Mesos
>          Issue Type: Bug
>          Components: cgroups, test
>            Reporter: Yan Xu
>
> Currently on hosts without prior cgroups setup and sysfs is mounted at /sys, mesos tests would fail like this:
> {noformat:title=}
> [ RUN      ] HTTPCommandExecutorTest.TerminateWithACK
> F1103 19:54:40.807538 439804 command_executor_tests.cpp:236] CHECK_SOME(_containerizer): Failed to create launcher: Failed to create Linux launcher: Failed to mount cgroups hierarchy at '/sys/fs/cgroup/fr
> eezer': Failed to create directory '/sys/fs/cgroup/freezer': No such file or directory
> {noformat}
> This is because the agent chooses to use {{LinuxLauncher}} based on availability of the {{freezer}} subsystem alone. However for it to work, one needs to do the following
> {noformat:title=}
> mount -t tmpfs cgroup_root /sys/fs/cgroup
> {noformat}
> in order to make  {{/sys/fs/cgroup}} writable. 
> I have always run the command manually in the past when this failure happens but this could be baffling especially to new developers. Mesos tests should just mount it if it's not already done.



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