[ClusterLabs] RGManager: no migration on kernel panic

[Digimer]

You must have fencing configured. DLM blocks until fenced confirms
successful fence and rgmanager uses DLM locks. Even in pacemaker,
fencing is required to prevent split-brains.

On 01/09/15 11:55 AM, Stanislav Kopp wrote:
> Hi all,
> 
> I'm testing now "corosync+cman+rgmanager" on Debian Jessie (since
> Pacemaker is not in repos), I'm running two nodes cluster with simple
> VIP resource. Resource migration work pretty well if I gracefully
> shutdown the active node, but if try to kill the node with simulated
> kernel panic (echo c > /proc/sysrq-trigger) the VIP resource will not
> be migrated even if "clustat" says the node is "offline". I've fome
> some errors in fenced.log
> 
> "fence rgmanager02 dev 0.0 agent none result: error no method"
> 
> So if I understand it right, since fencing is not working rgmanager
> does nothing in order to not make it worse, is that correct? If yes,
> can I force it do not care about fencing? (I know that is general not
> a good idea)
> 
> My cluster.conf for more information:
> ########################################
> <?xml version="1.0"?>
> <cluster name="mycluster" config_version="15">
> <cman two_node="1" expected_votes="1" transport="udpu"/>
> <clusternodes>
> <clusternode name="rgmanager01" nodeid="1">
> <fence/>
> </clusternode>
> <clusternode name="rgmanager02" nodeid="2">
> <fence/>
> </clusternode>
> </clusternodes>
> <fencedevices/>
> <rm>
> <failoverdomains>
> <failoverdomain name="domainarg" ordered="0" restricted="0">
> <failoverdomainnode name="rgmanager02" priority="1"/>
> <failoverdomainnode name="rgmanager02" priority="1"/>
> </failoverdomain>
> </failoverdomains>
> <resources>
> <ip address="192.168.122.10" monitor_link="1"/>
> </resources>
> <service autostart="1" domain="domainarg" exclusive="1" name="HA_IP"
> recovery="relocate">
> <ip ref="192.168.122.10"/>
> </service>
> </rm>
> </cluster>
> ################################################
> 
> 
> Thanks,
> Stan
> 
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