[ClusterLabs Developers] bundle/docker: zombie process on resource stop

[Klaus Wenninger]

On 07/24/2017 12:00 PM, Klaus Wenninger wrote:
> On 07/23/2017 10:19 AM, Valentin Vidic wrote:
>> I'm seeing this state when trying to stop the docker bundle
>> with pacemaker 1.1.17:
>>
>> 15738 ?        Ssl    7:23 /usr/sbin/dockerd -H fd://
>> 15742 ?        Ssl    5:31  \_ containerd -l unix:///var/run/docker/libcontainerd/containerd.sock --metrics-interval=0 --start-timeout 2m --state-dir /var/run/docker/libcontainerd/containerd --shim containerd-shim --runtime runc
>> 11221 ?        Sl     0:00  |   \_ containerd-shim 4cb4a14a49d5d54c2aac5a836255ca10785fb0a989c19539fc253afbbacea33d /var/run/docker/libcontainerd/4cb4a14a49d5d54c2aac5a836255ca10785fb0a989c19539fc253afbbacea33d runc
>> 11238 ?        Ss     0:59  |       \_ /usr/sbin/pacemaker_remoted
>> 11579 ?        Zs     0:11  |           \_ [httpd] <defunct>
>>   867 ?        S      0:00  |           \_ /bin/sh /usr/lib/ocf/resource.d/heartbeat/apache stop
>>  1165 ?        S      0:00  |               \_ sleep 1
>> 11186 ?        Sl     0:00  \_ /usr/sbin/docker-proxy -proto tcp -host-ip 192.168.122.131 -host-port 3121 -container-ip 172.17.0.2 -container-port 3121
>> 11197 ?        Sl     0:00  \_ /usr/sbin/docker-proxy -proto tcp -host-ip 192.168.122.131 -host-port 80 -container-ip 172.17.0.2 -container-port 80
>>
>> Seems the apache process thinks the https is still running
>> because pacemaker_remoted did not handle the zombie properly?
>>
> lrmd / pacemaker_remoted (special incarnation of lrmd actually) don't
> have any knowledge
> about processes that have been spawned by RAs so I guess taking care of
> zombies would
> rather be an issue the RA should be responsible for.

Wasn't aware of the different behavior of pacemaker_remoted as pidone.
If it is really spawned as pidone - which might be worth verifying -
it should indeed create a zombie catcher pid1.

Regards,
Klaus

>
> Regards,
> Klaus
>
> _______________________________________________
> Developers mailing list
> Developers at clusterlabs.org
> http://lists.clusterlabs.org/mailman/listinfo/developers


-- 
Klaus Wenninger

Senior Software Engineer, EMEA ENG Openstack Infrastructure

Red Hat

kwenning at redhat.com