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https://issues.apache.org/jira/browse/MESOS-6541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15635760#comment-15635760
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haosdent commented on MESOS-6541:
---------------------------------
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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