[lxc-users] cgmanager: cgm_list_children for controller=systemd, cgroup_path=user failed: invalid request

[Serge Hallyn]

Quoting Smart Goldman (ytlec2014 at gmail.com):
> 2015-01-17 5:31 GMT+09:00 Serge Hallyn <serge.hallyn at ubuntu.com>:
> 
> > Operation not permitted?  That's unexpected.  Are you running a custom
> > kernel or custom selinux policy?
> 
> Yes, mine is ubuntu system provided by a VPS service of
> https://crissic.net/los-angeles_vps_pre-launch
> I think it's a possibility. I may need to ask the provider about it..
>
> Although I do not think this information will be helpful, this is my kernel
> version.
> root at okapi:~# uname -a
> Linux okapi 2.6.32-042stab093.5 #1 SMP Wed Sep 10 17:39:49 MSK 2014 x86_64
> x86_64 x86_64 GNU/Linux
> I think I've never changed the kernel by myself.
> 
> > I do think removing cgroup-bin
> >
> > sudo apt-get purge cgroup-bin
> >
> > will fix the mounting of the name=beancounter etc hierarchies.
> 
> I had removed cgroup-bin.
> But unfortunately it looks like it was not fixed.
> 
> Each file after removing cgroup-bin, reboot and re-login is now as follows:
> 
> root at okapi:~# cat /proc/self/cgroup
> 4:name=systemd:/
> 3:freezer,devices,name=container:/12042
> 2:cpuacct,cpu,cpuset,name=fairsched:/12042
> 1:blkio,name=beancounter:/12042
> 
> root at okapi:~# tail -n 13 /var/log/upstart/cgmanager.log
> Mounted systemd onto /run/cgmanager/fs/none,name=systemd
> Mounted container onto /run/cgmanager/fs/none,name=container
> Mounted fairsched onto /run/cgmanager/fs/none,name=fairsched
> Mounted beancounter onto /run/cgmanager/fs/none,name=beancounter
> found 4 controllers
> buf is /run/cgmanager/agents/cgm-release-agent.systemd
> buf is /run/cgmanager/agents/cgm-release-agent.container
> buf is /run/cgmanager/agents/cgm-release-agent.fairsched
> buf is /run/cgmanager/agents/cgm-release-agent.beancounter
> Mounted systemd onto /run/cgmanager/fs/none,name=systemd
> cgmanager: Failed mounting /run/cgmanager/fs/none,name=container: Operation
> not permitted

Yeah that's weird.

Look around /var/log and see what is mounting those cgroups
at boot.  What files still exist under /etc/init and /etc/init.d?

> cgmanager: Failed mounting cgroups
> cgmanager: Failed to set up cgroup mounts
> 
> root at okapi:~# tail -n 10 /var/log/auth.log
> Jan 17 00:31:48 okapi sudo:     root : TTY=pts/0 ; PWD=/root ; USER=root ;
> COMMAND=/usr/bin/apt-get -y purge cgroup-bin
> Jan 17 00:31:48 okapi sudo: pam_unix(sudo:session): session opened for user
> root by root(uid=0)
> Jan 17 00:31:55 okapi sudo: pam_unix(sudo:session): session closed for user
> root
> Jan 17 00:32:53 okapi systemd-logind[326]: New seat seat0.
> Jan 17 00:32:54 okapi sshd[492]: Server listening on 0.0.0.0 port 22.
> Jan 17 00:32:54 okapi sshd[492]: Server listening on :: port 22.
> Jan 17 00:34:09 okapi sshd[897]: Accepted password for root from
> 119.105.136.26 port 56815 ssh2
> Jan 17 00:34:09 okapi sshd[897]: pam_unix(sshd:session): session opened for
> user root by (uid=0)
> Jan 17 00:34:09 okapi systemd-logind[326]: Failed to create cgroup
> name=systemd:/user/0.user: No such file or directory
> Jan 17 00:34:09 okapi sshd[897]: pam_systemd(sshd:session): Failed to
> create session: No such file or directory

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