[Pacemaker] Corosync won't recover when a node fails

Andrew Beekhof andrew at beekhof.net
Wed Oct 2 01:01:45 EDT 2013 

On 02/10/2013, at 5:24 AM, David Parker <dparker at utica.edu> wrote:

> Thanks, I did a little Googling and found the git repository for pcs.

pcs won't help you rebuild pacemaker with cman support (or corosync 2.x support) turned on though.


>  Is there any way to make a two-node cluster work with the stock Debian packages, though?  It seems odd that this would be impossible.

it really depends how the debian maintainers built pacemaker.
by the sounds of it, it only supports the pacemaker plugin mode for corosync 1.x

> 
> 
> On Tue, Oct 1, 2013 at 3:16 PM, Larry Brigman <larry.brigman at gmail.com> wrote:
> pcs is another package you will need to install.
> 
> On Oct 1, 2013 9:04 AM, "David Parker" <dparker at utica.edu> wrote:
> Hello,
> 
> Sorry for the delay in my reply.  I've been doing a lot of experimentation, but so far I've had no luck.
> 
> Thanks for the suggestion, but it seems I'm not able to use CMAN.  I'm running Debian Wheezy with Corosync and Pacemaker installed via apt-get.  When I installed CMAN and set up a cluster.conf file, Pacemaker refused to start and said that CMAN was not supported.  When CMAN is not installed, Pacemaker starts up fine, but I see these lines in the log:
> 
> Sep 30 23:36:29 test-vm-1 crmd: [6941]: ERROR: init_quorum_connection: The Corosync quorum API is not supported in this build
> Sep 30 23:36:29 test-vm-1 pacemakerd: [6932]: ERROR: pcmk_child_exit: Child process crmd exited (pid=6941, rc=100)
> Sep 30 23:36:29 test-vm-1 pacemakerd: [6932]: WARN: pcmk_child_exit: Pacemaker child process crmd no longer wishes to be respawned. Shutting ourselves down.
> 
> So, then I checked to see which plugins are supported:
> 
> # pacemakerd -F
> Pacemaker 1.1.7 (Build: ee0730e13d124c3d58f00016c3376a1de5323cff)
>  Supporting:  generated-manpages agent-manpages ncurses  heartbeat corosync-plugin snmp libesmtp
> 
> Am I correct in believing that this Pacemaker package has been compiled without support for any quorum API?  If so, does anyone know if there is a Debian package which has the correct support?
> 
> I also tried compiling LibQB, Corosync and Pacemaker from source via git, following the instructions documented here:
> 
> http://clusterlabs.org/wiki/SourceInstall
> 
> I was hopeful that this would work, because as I understand it, Corosync 2.x no longer uses CMAN.  Everything compiled and started fine, but the compiled version of Pacemaker did not include either the 'crm' or 'pcs' commands.  Do I need to install something else in order to get one of these?
> 
> Any and all help is greatly appreciated!
> 
>     Thanks,
>     Dave
> 
> 
> On Wed, Sep 25, 2013 at 6:08 AM, David Lang <david at lang.hm> wrote:
> the cluster is trying to reach a quarum (the majority of the nodes talking to each other) and that is never going to happen with only one node. so you have to disable this.
> 
> try putting
> <cman two_node="1" expected_votes="1" transport="udpu"/>
> in your cluster.conf
> 
> David Lang
> 
>  On Tue, 24 Sep 2013, David Parker wrote:
> 
> Date: Tue, 24 Sep 2013 11:48:59 -0400
> From: David Parker <dparker at utica.edu>
> Reply-To: The Pacemaker cluster resource manager
>     <pacemaker at oss.clusterlabs.org>
> To: The Pacemaker cluster resource manager <pacemaker at oss.clusterlabs.org>
> Subject: Re: [Pacemaker] Corosync won't recover when a node fails
> 
> 
> I forgot to mention, OS is Debian Wheezy 64-bit, Corosync and Pacemaker
> installed from packages via apt-get, and there are no local firewall rules
> in place:
> 
> # iptables -L
> Chain INPUT (policy ACCEPT)
> target     prot opt source               destination
> 
> Chain FORWARD (policy ACCEPT)
> target     prot opt source               destination
> 
> Chain OUTPUT (policy ACCEPT)
> target     prot opt source               destination
> 
> 
> On Tue, Sep 24, 2013 at 11:41 AM, David Parker <dparker at utica.edu> wrote:
> 
> Hello,
> 
> I have a 2-node cluster using Corosync and Pacemaker, where the nodes are
> actually to VirtualBox VMs on the same physical machine.  I have some
> resources set up in Pacemaker, and everything works fine if I move them in
> a controlled way with the "crm_resource -r <resource> --move --node <node>"
> command.
> 
> However, when I hard-fail one of the nodes via the "poweroff" command in
> Virtual Box, which "pulls the plug" on the VM, the resources do not move,
> and I see the following output in the log on the remaining node:
> 
> Sep 24 11:20:30 corosync [TOTEM ] The token was lost in the OPERATIONAL
> state.
> Sep 24 11:20:30 corosync [TOTEM ] A processor failed, forming new
> configuration.
> Sep 24 11:20:30 corosync [TOTEM ] entering GATHER state from 2.
> Sep 24 11:20:31 test-vm-2 lrmd: [2503]: debug: rsc:drbd_r0:0 monitor[31]
> (pid 8495)
> drbd[8495]:     2013/09/24_11:20:31 WARNING: This resource agent is
> deprecated and may be removed in a future release. See the man page for
> details. To suppress this warning, set the "ignore_deprecation" resource
> parameter to true.
> drbd[8495]:     2013/09/24_11:20:31 WARNING: This resource agent is
> deprecated and may be removed in a future release. See the man page for
> details. To suppress this warning, set the "ignore_deprecation" resource
> parameter to true.
> drbd[8495]:     2013/09/24_11:20:31 DEBUG: r0: Calling drbdadm -c
> /etc/drbd.conf role r0
> drbd[8495]:     2013/09/24_11:20:31 DEBUG: r0: Exit code 0
> drbd[8495]:     2013/09/24_11:20:31 DEBUG: r0: Command output:
> Secondary/Primary
> drbd[8495]:     2013/09/24_11:20:31 DEBUG: r0: Calling drbdadm -c
> /etc/drbd.conf cstate r0
> drbd[8495]:     2013/09/24_11:20:31 DEBUG: r0: Exit code 0
> drbd[8495]:     2013/09/24_11:20:31 DEBUG: r0: Command output: Connected
> drbd[8495]:     2013/09/24_11:20:31 DEBUG: r0 status: Secondary/Primary
> Secondary Primary Connected
> Sep 24 11:20:31 test-vm-2 lrmd: [2503]: info: operation monitor[31] on
> drbd_r0:0 for client 2506: pid 8495 exited with return code 0
> Sep 24 11:20:32 corosync [TOTEM ] entering GATHER state from 0.
> Sep 24 11:20:34 corosync [TOTEM ] The consensus timeout expired.
> Sep 24 11:20:34 corosync [TOTEM ] entering GATHER state from 3.
> Sep 24 11:20:36 corosync [TOTEM ] The consensus timeout expired.
> Sep 24 11:20:36 corosync [TOTEM ] entering GATHER state from 3.
> Sep 24 11:20:38 corosync [TOTEM ] The consensus timeout expired.
> Sep 24 11:20:38 corosync [TOTEM ] entering GATHER state from 3.
> Sep 24 11:20:40 corosync [TOTEM ] The consensus timeout expired.
> Sep 24 11:20:40 corosync [TOTEM ] entering GATHER state from 3.
> Sep 24 11:20:40 corosync [TOTEM ] Totem is unable to form a cluster
> because of an operating system or network fault. The most common cause of
> this message is that the local firewall is configured improperly.
> Sep 24 11:20:43 corosync [TOTEM ] The consensus timeout expired.
> Sep 24 11:20:43 corosync [TOTEM ] entering GATHER state from 3.
> Sep 24 11:20:43 corosync [TOTEM ] Totem is unable to form a cluster
> because of an operating system or network fault. The most common cause of
> this message is that the local firewall is configured improperly.
> Sep 24 11:20:45 corosync [TOTEM ] The consensus timeout expired.
> Sep 24 11:20:45 corosync [TOTEM ] entering GATHER state from 3.
> Sep 24 11:20:45 corosync [TOTEM ] Totem is unable to form a cluster
> because of an operating system or network fault. The most common cause of
> this message is that the local firewall is configured improperly.
> Sep 24 11:20:47 corosync [TOTEM ] The consensus timeout expired.
> 
> Those last 3 messages just repeat over and over, the cluster never
> recovers, and the resources never move.  "crm_mon" reports that the
> resources are still running on the dead node, and shows no indication that
> anything has gone wrong.
> 
> Does anyone know what the issue could be?  My expectation was that the
> remaining node would become the sole member of the cluster, take over the
> resources, and everything would keep running.
> 
> For reference, my corosync.conf file is below:
> 
> compatibility: whitetank
> 
> totem {
>         version: 2
>         secauth: off
>         interface {
>                 member {
>                         memberaddr: 192.168.25.201
>                 }
>                 member {
>                         memberaddr: 192.168.25.202
>                  }
>                 ringnumber: 0
>                 bindnetaddr: 192.168.25.0
>                 mcastport: 5405
>         }
>         transport: udpu
> }
> 
> logging {
>         fileline: off
>         to_logfile: yes
>         to_syslog: yes
>         debug: on
>         logfile: /var/log/cluster/corosync.log
>         timestamp: on
>         logger_subsys {
>                 subsys: AMF
>                 debug: on
>         }
> }
> 
> 
> Thanks!
> Dave
> 
> --
> Dave Parker
> Systems Administrator
> Utica College
> Integrated Information Technology Services
> (315) 792-3229
> Registered Linux User #408177
> 
> 
> 
> 
> 
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> 
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> 
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> 
> 
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> 
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> 
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> Bugs: http://bugs.clusterlabs.org
> 
> 
> 
> 
> -- 
> Dave Parker
> Systems Administrator
> Utica College
> Integrated Information Technology Services
> (315) 792-3229
> Registered Linux User #408177
> 
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
> 
> 
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
> 
> 
> 
> 
> -- 
> Dave Parker
> Systems Administrator
> Utica College
> Integrated Information Technology Services
> (315) 792-3229
> Registered Linux User #408177
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org

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