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

[Serge Hallyn]

What do /proc/self/cgroup and /var/log/upstart/cgmanager.log now show?

Quoting Smart Goldman (ytlec2014 at gmail.com):
> > Sorry, I did a bad cut-paste.  Drop the "env" in front of
> cgm_extra_mounts.
> > Make sure that
> >
> > cgm_extra_mounts="-m
> name=systemd,name=container,name=fairsched,name=beancounter"
> >
> > is all one line.
> 
> Thank you. The log "failed: invalid request" by reboot has been removed!
> But instead, now these 2 errors are written in /var/log/auth.log by login.
> 
> Jan 15 13:38:57 myhost systemd-logind[440]: Failed to create cgroup
> name=systemd:/user/0.user: No such file or directory
> Jan 15 13:38:57 myhost sshd[894]: pam_systemd(sshd:session): Failed to
> create session: No such file or directory
> 
> Hmm... Why these errors come again?
> 
> Here are logs of reboot and login:
> Jan 15 13:36:08 myhost sshd[1097]: Accepted password for root from
> 119.105.136.26 port 54477 ssh2
> Jan 15 13:36:08 myhost sshd[1097]: pam_unix(sshd:session): session opened
> for user root by (uid=0)
> Jan 15 13:36:08 myhost systemd-logind[442]: Removed session c3.
> Jan 15 13:36:08 myhost systemd-logind[442]: New session c4 of user root.
> Jan 15 13:37:59 myhost systemd-logind[440]: New seat seat0.
> Jan 15 13:38:00 myhost sshd[495]: Server listening on 0.0.0.0 port 22.
> Jan 15 13:38:00 myhost sshd[495]: Server listening on :: port 22.
> Jan 15 13:38:57 myhost sshd[894]: Accepted password for root from
> 119.105.136.26 port 54519 ssh2
> Jan 15 13:38:57 myhost sshd[894]: pam_unix(sshd:session): session opened
> for user root by (uid=0)
> Jan 15 13:38:57 myhost systemd-logind[440]: Failed to create cgroup
> name=systemd:/user/0.user: No such file or directory
> Jan 15 13:38:57 myhost sshd[894]: pam_systemd(sshd:session): Failed to
> create session: No such file or directory
> root at myhost:~#
> 
> 2015-01-15 22:33 GMT+09:00 Serge Hallyn <serge.hallyn at ubuntu.com>:
> 
> > Quoting Smart Goldman (ytlec2014 at gmail.com):
> > > 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"
> >
> > Sorry, I did a bad cut-paste.  Drop the "env" in front of cgm_extra_mounts.
> > Make sure that
> >
> > cgm_extra_mounts="-m
> > name=systemd,name=container,name=fairsched,name=beancounter"
> >
> > is all one line.
> > _______________________________________________
> > lxc-users mailing list
> > lxc-users at lists.linuxcontainers.org
> > http://lists.linuxcontainers.org/listinfo/lxc-users
> >

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