[Pacemaker] Periodically appear non-existent nodes

[Andreas Kurz]

On 04/18/2012 11:46 PM, ruslan usifov wrote:
> 
> 
> 2012/4/18 Andreas Kurz <andreas at hastexo.com <mailto:andreas at hastexo.com>>
> 
>     On 04/17/2012 09:31 PM, ruslan usifov wrote:
>     >
>     >
>     > 2012/4/17 Proskurin Kirill <k.proskurin at corp.mail.ru
>     <mailto:k.proskurin at corp.mail.ru>
>     > <mailto:k.proskurin at corp.mail.ru <mailto:k.proskurin at corp.mail.ru>>>
>     >
>     >     On 04/17/2012 03:46 PM, ruslan usifov wrote:
>     >
>     >         2012/4/17 Andreas Kurz <andreas at hastexo.com
>     <mailto:andreas at hastexo.com>
>     >         <mailto:andreas at hastexo.com <mailto:andreas at hastexo.com>>
>     <mailto:andreas at hastexo.com <mailto:andreas at hastexo.com>
>     >         <mailto:andreas at hastexo.com <mailto:andreas at hastexo.com>>>>
>     >
>     >
>     >            On 04/14/2012 11:14 PM, ruslan usifov wrote:
>     >             > Hello
>     >             >
>     >             > I remove 2 nodes from cluster, with follow sequence:
>     >             >
>     >             > crm_node --force -R <id of node1>
>     >             > crm_node --force -R <id of node2>
>     >             > cibadmin --delete --obj_type nodes --crm_xml '<node
>     >         uname="node1"/>'
>     >             > cibadmin --delete --obj_type status --crm_xml
>     '<node_state
>     >            uname="node1"/>'
>     >             > cibadmin --delete --obj_type nodes --crm_xml '<node
>     >         uname="node2"/>'
>     >             > cibadmin --delete --obj_type status --crm_xml
>     '<node_state
>     >            uname="node2"/>'
>     >             >
>     >             >
>     >             > Nodes after this deleted, but if for example i restart
>     >         (reboot)
>     >            one of
>     >             > existent nodes in working cluster, this deleted nodes
>     >         appear again in
>     >             > OFFLINE state
>     >
>     >
>     >     I have this problem some time ago.
>     >     I "solved" it something like that:
>     >
>     >     crm node delete NODENAME
>     >     crm_node --force --remove NODENAME
>     >     cibadmin --delete --obj_type nodes --crm_xml '<node
>     uname="NODENAME"/>'
>     >     cibadmin --delete --obj_type status --crm_xml '<node_state
>     >     uname="NODENAME"/>'
>     >
>     >     --
>     >
>     >
>     > I do the same, but some times after cluster reconfiguration (node
>     failed
>     > due power supply failure) removed nodes appear again, and this happens
>     > 3-4 times
> 
>     And the same behavior if you switch your cluster into maintenance-mode
>     (to avoid service downtime) and stop/start pacemaker and corosync
>     completely?
> 
> 
> We will have maintenance window at this Friday (20.04.2012) so after
> that i can report more info.

Of course, that is the safest option ... though you won't have a service
downtime if you enable maintenance-mode prior to cluster restart.

> 
> PS: I had similar situation on other cluster some times ago, and there i
> fully restart cluster and problem reproduced. But after some time(about
> 1-2 week) not existent nodes have ceased to appear

Now that is really strange ... if that happens again, the
corosync/pacemaker log files would be really interesting to have a look at.

Regards,
Andreas

-- 
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http://www.hastexo.com/services/remote

> 
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