[lxc-users] cgm getvalue invalid request on lxc host

[Georg Schönberger]

On Mit, 2015-04-01 at 00:16 +0000, Serge Hallyn wrote:
> Quoting Georg Schönberger (gschoenberger at thomas-krenn.com):
> > Hi LXC team,
> > 
> > somehow my cgm setup stopped working today!
> > 
> > I cannot make a request from the host anymore:
> > # lxc-cgroup -n ubuntu1 memory.usage_in_bytes
> > 32956416
> > # cgm getvalue memory /lxc/ubuntu1 memory.usage_in_bytes
> > Error org.freedesktop.DBus.Error.InvalidArgs: invalid request
> 
> Hm - this is on the *host*?

Yes, this in on the host, the container name is 'ubuntu1' and it's
running.
I am using a fresh installed trusty with latest kernel and updates for
testing.

I have added "debug" to cgmanager, now the log states:
# tail /var/log/upstart/cgmanager.log
Connection from private client
GetValue: Client fd is: 6 (pid=1793, uid=0, gid=0)
cgmanager:get_value_main: target cgroup is not below r (1793)'s
Disconnected from private client

lxc-cgroup still working:
# lxc-cgroup -n ubuntu1 memory.usage_in_bytes
28852224

> > In the log I got
> > # tail /var/log/upstart/cgmanager.log
> > cgmanager: Invalid path /run/cgmanager/fs/none,name=systemd///user (No
> > such file or directory)
> > cgmanager:list_children_main: Could not determine the requested cgroup
> > cgmanager:get_pid_cgroup_main: Could not determine the requestor cgroup
> > cgmanager:get_pid_cgroup_main: Could not determine the requestor cgroup
> > cgmanager:get_value_main: target cgroup is not below r (2280)'s
> 
> > The log message was introduced by the following patch:
> > *https://lists.debian.org/debian-release/2015/02/msg00396.html
> > with the following comments:
> > *// Get p's current cgroup in pcgpath
> > *// Make sure target cgroup is under proxy's
> > So maybe it's a permission or proxy issue?
> 
> Can you show
> 
> ps -ef | egrep -e "(cgmanager|cgproxy)"
# ps -ef | egrep -e "(cgmanager|cgproxy)"
root      1261     1  0 08:52 ?        00:00:00 /sbin/cgmanager
--sigstop --debug -m name=systemd
root      1806  1242  0 08:53 pts/0    00:00:00 egrep --color=auto -e
(cgmanager|cgproxy)
> 
> uname -a
# uname -a
Linux lxc-trusty 3.13.0-48-generic #80-Ubuntu SMP Thu Mar 12 11:16:15
UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
> cat /proc/self/cgroup
# cat /proc/self/cgroup 
11:hugetlb:/user/1000.user/1.session
10:perf_event:/user/1000.user/1.session
9:blkio:/user/1000.user/1.session
8:freezer:/user/1000.user/1.session
7:devices:/user/1000.user/1.session
6:memory:/user/1000.user/1.session
5:cpuacct:/user/1000.user/1.session
4:cpu:/user/1000.user/1.session
3:cpuset:/user/1000.user/1.session
2:name=systemd:/user/1000.user/1.session

I have also tried talking directly to cgmanager:
# dbus-send --print-reply
--address=unix:path=/sys/fs/cgroup/cgmanager/sock
--type=method_call /org/linuxcontainers/cgmanager
org.linuxcontainers.cgmanager0_0.GetValue string:'memory'
string:'/lxc/ubuntu1' string:memory.limit_in_bytes

But I don't know how to specify the cgroup correctly?
* /lxc/ubuntu1, lxc/ubuntu1

-Georg

> _______________________________________________
> lxc-users mailing list
> lxc-users at lists.linuxcontainers.org
> http://lists.linuxcontainers.org/listinfo/lxc-users