[lxc-users] cannot enable dev loop access from LXC

[Serge Hallyn]

If you're on ubuntu, could you go to pad.lv/u/lxc and file a bug so
we can better track the configuration info?

Otherwise, can you show:

uname -r
cat /etc/*-release
cat /var/lib/lxc/local-server-7/config (*with* the line added)

After trying to start the container again the last 200 lines of

/var/log/audit/auditd.log if it exists,
/var/log/syslog

For the last two, look over them first to make sure no sensitive
info is there.

Quoting Bin Zhou (lakerzhou at yahoo.com):
> @Serge
> Thanks for the response.
> 
> Host:~$ sudo cat /sys/fs/cgroup/devices/lxc/local-server-7/devices.list
> c *:* m
> b *:* m
> c 1:3 rwm
> c 1:5 rwm
> c 5:1 rwm
> c 5:0 rwm
> c 1:9 rwm
> c 1:8 rwm
> c 136:* rwm
> c 5:2 rwm
> c 254:0 rwm
> c 10:229 rwm
> c 10:200 rwm
> c 1:7 rwm
> c 10:228 rwm
> c 10:232 rwm
> 
> 
> 
> 
> > On Thursday, September 11, 2014 12:36 PM, Serge Hallyn <serge.hallyn at ubuntu.com> wrote:
> > Quoting Bin Zhou (lakerzhou at yahoo.com):
> > > 
> > > 
> > > 
> > > 
> > > >On Wednesday, September 10, 2014 2:30 PM, Serge Hallyn <serge.hallyn at ubuntu.com> wrote:
> > > 
> > > 
> > > 
> > > >Quoting Bin Zhou (lakerzhou at yahoo.com):
> > > >> Hi,
> > > >> 
> > >> I am trying to enable dev loop access in LXC and set up glusterFS server volume on the loop dev.
> > > >> I add the following line to /var/lib/lxc/local-server-7/config
> > > >>  lxc.cgroup.devices.allow = b 7:* rwm
> > > >
> > > > Certainly looks fine.
> > > >
> > > >
> > > >> The container failed to start with the new config.
> > > >> 
> > > >> ubuntu at bpcluster1:~$ sudo lxc-start -n local-server-7 
> > > >> lxc-start: write /sys/fs/cgroup/devices//lxc/local-server-7/devices.allow : Invalid argument
> > > >> lxc-start: failed to setup the cgroups for 'local-server-7'
> > > >> lxc-start: failed to setup the container
> > > >> lxc-start: invalid sequence number 1. expected 2
> > > >> lxc-start: failed to spawn 'local-server-7
> > > >
> > > > Hm.  Can you cat /sys/fs/cgroup/devices/lxc/devices.list ?
> > > 
> > > Host:~$ sudo cat /sys/fs/cgroup/devices/lxc/devices.list 
> > > a *:* rwm
> 
> > Adding "lxc.cgroup.devices.allow = b 7:* rwm" to a brand-new container works
> > for me here.  Can you start the container without that line and show
> 
> > /sys/fs/cgroup/devices/lxc/local-server-7/devices.list
> 
> > while it's running?
> 
> 
> 
> _______________________________________________
> lxc-users mailing list
> lxc-users at lists.linuxcontainers.org
> http://lists.linuxcontainers.org/listinfo/lxc-users
> _______________________________________________
> lxc-users mailing list
> lxc-users at lists.linuxcontainers.org
> http://lists.linuxcontainers.org/listinfo/lxc-users