[ClusterLabs] Pacemaker failover failure

Wed Jul 1 14:37:14 UTC 2015

I am running version 1.4.7 of corosync

On Wed, Jul 1, 2015 at 3:25 PM, Ken Gaillot <kgaillot at redhat.com> wrote:

> On 07/01/2015 08:57 AM, alex austin wrote:
> > I have now configured stonith-enabled=true. What device should I use for
> > fencing given the fact that it's a virtual machine but I don't have
> access
> > to its configuration. would fence_pcmk do? if so, what parameters should
> I
> > configure for it to work properly?
>
> No, fence_pcmk is not for using in pacemaker, but for using in RHEL6's
> CMAN to redirect its fencing requests to pacemaker.
>
> For a virtual machine, ideally you'd use fence_virtd running on the
> physical host, but I'm guessing from your comment that you can't do
> that. Does whoever provides your VM also provide an API for controlling
> it (starting/stopping/rebooting)?
>
> Regarding your original problem, it sounds like the surviving node
> doesn't have quorum. What version of corosync are you using? If you're
> using corosync 2, you need "two_node: 1" in corosync.conf, in addition
> to configuring fencing in pacemaker.
>
> > This is my new config:
> >
> >
> > node dcwbpvmuas004.edc.nam.gm.com \
> >
> >         attributes standby=off
> >
> > node dcwbpvmuas005.edc.nam.gm.com \
> >
> >         attributes standby=off
> >
> > primitive ClusterIP IPaddr2 \
> >
> >         params ip=198.208.86.242 cidr_netmask=23 \
> >
> >         op monitor interval=1s timeout=20s \
> >
> >         op start interval=0 timeout=20s \
> >
> >         op stop interval=0 timeout=20s \
> >
> >         meta is-managed=true target-role=Started resource-stickiness=500
> >
> > primitive pcmk-fencing stonith:fence_pcmk \
> >
> >         params pcmk_host_list="dcwbpvmuas004.edc.nam.gm.com
> > dcwbpvmuas005.edc.nam.gm.com" \
> >
> >         op monitor interval=10s \
> >
> >         meta target-role=Started
> >
> > primitive redis redis \
> >
> >         meta target-role=Master is-managed=true \
> >
> >         op monitor interval=1s role=Master timeout=5s on-fail=restart
> >
> > ms redis_clone redis \
> >
> >         meta notify=true is-managed=true ordered=false interleave=false
> > globally-unique=false target-role=Master migration-threshold=1
> >
> > colocation ClusterIP-on-redis inf: ClusterIP redis_clone:Master
> >
> > colocation ip-on-redis inf: ClusterIP redis_clone:Master
> >
> > colocation pcmk-fencing-on-redis inf: pcmk-fencing redis_clone:Master
> >
> > property cib-bootstrap-options: \
> >
> >         dc-version=1.1.11-97629de \
> >
> >         cluster-infrastructure="classic openais (with plugin)" \
> >
> >         expected-quorum-votes=2 \
> >
> >         stonith-enabled=true
> >
> > property redis_replication: \
> >
> >         redis_REPL_INFO=dcwbpvmuas005.edc.nam.gm.com
> >
> > On Wed, Jul 1, 2015 at 2:53 PM, Nekrasov, Alexander <
> > alexander.nekrasov at emc.com> wrote:
> >
> >> stonith-enabled=false
> >>
> >> this might be the issue. The way peer node death is resolved, the
> >> surviving node must call STONITH on the peer. If it’s disabled it might
> not
> >> be able to resolve the event
> >>
> >>
> >>
> >> Alex
> >>
> >>
> >>
> >> *From:* alex austin [mailto:alexixalex at gmail.com]
> >> *Sent:* Wednesday, July 01, 2015 9:51 AM
> >> *To:* Users at clusterlabs.org
> >> *Subject:* Re: [ClusterLabs] Pacemaker failover failure
> >>
> >>
> >>
> >> So I noticed that if I kill redis on one node, it starts on the other,
> no
> >> problem, but if I actually kill pacemaker itself on one node, the other
> >> doesn't "sense" it so it doesn't fail over.
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> On Wed, Jul 1, 2015 at 12:42 PM, alex austin <alexixalex at gmail.com>
> wrote:
> >>
> >> Hi all,
> >>
> >>
> >>
> >> I have configured a virtual ip and redis in master-slave with corosync
> >> pacemaker. If redis fails, then the failover is successful, and redis
> gets
> >> promoted on the other node. However if pacemaker itself fails on the
> active
> >> node, the failover is not performed. Is there anything I missed in the
> >> configuration?
> >>
> >>
> >>
> >> Here's my configuration (i have hashed the ip address out):
> >>
> >>
> >>
> >> node host1.com
> >>
> >> node host2.com
> >>
> >> primitive ClusterIP IPaddr2 \
> >>
> >> params ip=xxx.xxx.xxx.xxx cidr_netmask=23 \
> >>
> >> op monitor interval=1s timeout=20s \
> >>
> >> op start interval=0 timeout=20s \
> >>
> >> op stop interval=0 timeout=20s \
> >>
> >> meta is-managed=true target-role=Started resource-stickiness=500
> >>
> >> primitive redis redis \
> >>
> >> meta target-role=Master is-managed=true \
> >>
> >> op monitor interval=1s role=Master timeout=5s on-fail=restart
> >>
> >> ms redis_clone redis \
> >>
> >> meta notify=true is-managed=true ordered=false interleave=false
> >> globally-unique=false target-role=Master migration-threshold=1
> >>
> >> colocation ClusterIP-on-redis inf: ClusterIP redis_clone:Master
> >>
> >> colocation ip-on-redis inf: ClusterIP redis_clone:Master
> >>
> >> property cib-bootstrap-options: \
> >>
> >> dc-version=1.1.11-97629de \
> >>
> >> cluster-infrastructure="classic openais (with plugin)" \
> >>
> >> expected-quorum-votes=2 \
> >>
> >> stonith-enabled=false
> >>
> >> property redis_replication: \
> >>
> >> redis_REPL_INFO=host.com
>
>
>
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