Hi all,

I'm trying to deploy Singularity <https://github.com/HubSpot/Singularity>(
which is a scheduler for running Mesos tasks ) on Rancher with a set of
RHEL 7.3 (3.10.0) instances. Everything else works fine but the slave node
keeps failing to start giving the following error.


10/9/2017 1:26:37 PMFailed to create a containerizer: Could not create
> MesosContainerizer: Failed to create launcher: Failed to create Linux
> launcher: Failed to determine the hierarchy where the subsystem freezer is
> attached
> 10/9/2017 1:27:37 PMI1009 07:57:37.437608     1 main.cpp:223] Build:
> 2016-04-14 15:41:24 by root
> 10/9/2017 1:27:37 PMI1009 07:57:37.437958     1 main.cpp:225] Version:
> 0.28.1
> 10/9/2017 1:27:37 PMI1009 07:57:37.437963     1 main.cpp:228] Git tag:
> 0.28.1
> 10/9/2017 1:27:37 PMI1009 07:57:37.437968     1 main.cpp:232] Git SHA:
> 555db235a34afbb9fb49940376cc33a66f1f85f0
> 10/9/2017 1:27:37 PMMount failed for selinuxfs on /sys/fs/selinux:
>  Operation not permitted
> 10/9/2017 1:27:37 PMI1009 07:57:37.564023     1 containerizer.cpp:149]
> Using isolation: cgroups/cpu,cgroups/mem,filesystem/posix



I'm using the docker-compose.yml
<https://github.com/HubSpot/Singularity/blob/master/docker-compose.yml>
file in the Singularity repo <https://github.com/HubSpot/Singularity> to
deploy to Rancher. When I queried about this issue
<https://github.com/HubSpot/Singularity/issues/1624>, I was told this is
something wrong with the configuration of mesos slave, How can I resolve
this?

PS: I raised this
<https://stackoverflow.com/questions/46560097/singularity-failing-to-create-slave-on-rancher-with-rhel-7-instances>
question on Stackoverflow also, but did not get any answer.


Regards,
Milindu Sanoj Kumarage
LinkedIn <https://lk.linkedin.com/in/agentmilindu> | GitHub
<https://github.com/agentmilindu/> | agentmilindu.com

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