[Samba] Does CTDB run under LXC containers?

[Michael Adam]

On 2015-08-04 at 19:27 +0200, Ralph Böhme wrote:
> Hi Peter,
> 
> On Tue, Aug 04, 2015 at 10:11:56AM -0700, Peter Steele wrote:
> > We're transitioning from a VM based environment to one that uses LXC based
> > containers running under CentOS 7. CTDB runs fine under our CentOS 7 VMs.
> > The same packages running under LXC however seem to have issues:
> > 
> > # systemctl start ctdb.service
> > Job for ctdb.service failed. See 'systemctl status ctdb.service' and
> > 'journalctl -xn' for details.
> > 
> > # systemctl status ctdb.service
> > ctdb.service - CTDB
> >    Loaded: loaded (/usr/lib/systemd/system/ctdb.service; disabled)
> >    Active: failed (Result: exit-code) since Tue 2015-08-04 10:09:06 PDT; 5s
> > ago
> >   Process: 9023 ExecStart=/usr/sbin/ctdbd_wrapper /run/ctdb/ctdbd.pid start
> > (code=exited, status=1/FAILURE)
> > 
> > Aug 04 10:09:04 pws-01 ctdbd[9031]: CTDB starting on node
> > Aug 04 10:09:04 pws-01 ctdbd[9032]: Starting CTDBD (Version 2.5.4) as PID:
> > 9032
> > Aug 04 10:09:04 pws-01 ctdbd[9032]: Created PID file /run/ctdb/ctdbd.pid
> > Aug 04 10:09:04 pws-01 ctdbd[9032]: Unable to set scheduler to SCHED_FIFO
> > (Operation not permitted)
> 
> your container is dopping sys_nice cap, fix the container config.

Indeed, to make it more concrete, uncomment "lxc.cap.drop = sys_nice"
(or so) in /var/lib/lxc/<container>/config.

And more caps may occur.

> On my Fedora LXC host

Fedora host? -- interesting. :-)

Cheers - Michael
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