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

[Smart Goldman]

2015-01-15 5:12 GMT+09:00 Serge Hallyn <serge.hallyn at ubuntu.com>:
> Quoting Smart Goldman (ytlec2014 at gmail.com):
> > 2015-01-15 0:11 GMT+09:00 Serge Hallyn <serge.hallyn at ubuntu.com>:
> >
> > > cgmanager is an lxc project, so no worries.
> >
> > Okay. and thank you for swift response.
> >
> > > A few things - first, running cgroup-bin alongside cgmanager is
> > probably a bad idea.
> >
> > Oh really? It is better to remove either one?
> > Another following 2 errors were output before installing these 2 things.
> > sshd[4603]: pam_systemd(sshd:session): Failed to create session: No such
> > file or directory
> > systemd-logind[2957]: Failed to create cgroup
name=systemd:/user/0.user: No
> > such file or directory
>
> 0.user?  This is logging in as root?

Yes. This log was recorded by logging in with root.
If I am right, it was output as 1000.user when I logged in with normal user.

> > After executing 'apt-get -y install cgroup-bin cgmanager-utils', above 2
> > errors were removed.
> >
> > > Second, on 14.04 after install cgmanager
> > > you unfortunately need to 'sudo restart systemd-logind', then
> > > log out and log back in (or just ssh localhost) to get a new
> > > cgroup.  After that you should be able to create unprivileged
containers.
> >
> > Now I tried 'sudo restart systemd-logind' and systemd-logind restarted.
> > After that I logged out, log back and execute 'reboot'.
> > However error log of cgmanager is still written on /var/log/auth.log.
>
> Create the file /etc/default/cgmanager containing the text:
>
> cgmanager_opts="--debug"
>
> Restart cgmanager (sudo stop cgmanager; sudo start cgmanager) and then
> login, and look at /var/log/upstart/cgmanager.log

Here's /var/log/upstart/cgmanager.log after restarting and logging in the
ubuntu with root. I found there is something like error
"cgmanager:get_pid_cgroup_main: Could not determine the requestor cgroup".

root at myhost:~# tail -f /var/log/upstart/cgmanager.log
UPSTART_JOB=cgmanager
TERM=linux
PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin
cgmanager_opts=--debug
PWD=/
cgm_extra_mounts=-m
name=systemd,name=container,name=fairsched,name=beancounter
Mounted systemd onto /run/cgmanager/fs/none,name=systemd
found 1 controllers
buf is /run/cgmanager/agents/cgm-release-agent.systemd
Mounted systemd onto /run/cgmanager/fs/none,name=systemd
Connection from private client
GetPidCgroup: Client fd is: 6 (pid=442, uid=0, gid=0)
cgmanager:get_pid_cgroup_main: Could not determine the requestor cgroup
Disconnected from private client
Connection from private client
Create: Client fd is: 6 (pid=442, uid=0, gid=0)
Created /run/cgmanager/fs/none,name=systemd/user/0.user/c2.session for 442
(0:0)
cgmanager_create: returning 0; existed is -1
Connection from private client
Disconnected from private client
MovePid: Client fd is: 7 (pid=442, uid=0, gid=0)
963 moved to systemd:user/0.user/c2.session by 442's request
Connection from private client
Disconnected from private client
Chown: Client fd is: 6 (pid=442, uid=0, gid=0)
Chown: Client fd is: 6 (pid=442, uid=0, gid=0)
Connection from private client
Disconnected from private client
Chown: Client fd is: 7 (pid=442, uid=0, gid=0)
Chown: Client fd is: 7 (pid=442, uid=0, gid=0)
Disconnected from private client

> > This error message is written even if I log out before reboot is
executed
> > or I execute reboot via control panel which is outside of ubuntu system.
> >
> > > The message may be ignorable - the real question is, when you
> > > login, do you get a custom cgroup?  What does /proc/self/cgroup
> > > show?
> >
> > I am sorry. How can I know whether I got a custom cgroup?
> > Here is the contents of my /proc/self/cgroup.
> >
> > root at myhost:~# cat /proc/self/cgroup
> > 4:name=systemd:/user/1000.user/c1.session
> > 3:freezer,devices,name=container:/12042
> > 2:cpuacct,cpu,cpuset,name=fairsched:/12042
> > 1:blkio,name=beancounter:/12042
> > root at myhost:~#
> >
> > I appreciate your help and I apologize for troubling you.
>
> The /12042 is weird.  It looks like something libcgroup may have
> done for you.
>
> You may be able to work around this by adding the line:
>
> env cgm_extra_mounts="-m
name=systemd,name=container,name=fairsched,name=beancounter"
>
> to /etc/default/cgmanager

I added that line to /etc/default/cgmanager.
But the log "failed: invalid request" is still written.

Here's my current /etc/default/cgmanager:
root at myhost:~# cat /etc/default/cgmanager
cgmanager_opts="--debug"
env cgm_extra_mounts="-m
name=systemd,name=container,name=fairsched,name=beancounter"
root at myhost:~#

Regards,
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