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src/slave/containerizer/linux_launcher.cpp (line 190)
<https://reviews.apache.org/r/39604/#comment162845>

    OK, this is problematic and almost caused us an incident at Twitter.
    
    Mesos is able to create 'freezer' hierarchy if it's not already mounted. In 
some configurations, the host won't pre-mount all cgroups hierarchies. We 
should remove that check here.


- Jie Yu


On Oct. 23, 2015, 11:48 p.m., Artem Harutyunyan wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/39604/
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> 
> (Updated Oct. 23, 2015, 11:48 p.m.)
> 
> 
> Review request for mesos, Ben Mahler, Jie Yu, Joris Van Remoortere, and Kapil 
> Arya.
> 
> 
> Bugs: MESOS-3800
>     https://issues.apache.org/jira/browse/MESOS-3800
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> We recently switched to using LinuxLauncher by default 
> (https://github.com/apache/mesos/blame/master/src/slave/containerizer/mesos/containerizer.cpp#L217-L234).
>  This causes problems with running the slave in a Docker container. 
> 
> This patch introduces a function for checking whether the machine is suited 
> for running Linux launcher. For the time being it checks whether the freezer 
> cgroup subsystem enabled, as the Linux launcher evolves we might want to add 
> more checks.
> 
> 
> Diffs
> -----
> 
>   src/slave/containerizer/linux_launcher.hpp 
> 35b3315498d690ed66616617aa7d51455371fb5b 
>   src/slave/containerizer/linux_launcher.cpp 
> c03b89eb0678825b03a052874d6262f377a39e13 
>   src/slave/containerizer/mesos/containerizer.cpp 
> d1fc5a460e7313828014eea999cf4e63dde01921 
> 
> Diff: https://reviews.apache.org/r/39604/diff/
> 
> 
> Testing
> -------
> 
> - Ran Mesoss tests in a Docker container where cgroup was not available.
> - Ran the new Jenkins script (https://reviews.apache.org/r/37787/).
> 
> 
> Thanks,
> 
> Artem Harutyunyan
> 
>

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