[Pacemaker] Pull the plug on one node, the resource doesn't promote the other node to master

[Matteo Bignotti]

Thank you man,

I realized what it was, We're running pacemaker held up by a third item 
(r-series) which through a usb connection and a resource agent controls 
the cluster. When I unplug the network cable he doesn't understand that 
it's disconnected because the usb is still up if I unplug both it works.

Now, let me try and ask...

in my pacemaker I have this configuration

--------------------------------------------------------------------------

*primitive GatewayStatus ocf:pacemaker:ping \
     params host_list="10.10.0.1" multiplier="100" \
     op monitor interval="5" timeout="10"*
primitive ResourceCustom ocf:Company:resourcecustom \
     op monitor interval="10" timeout="20" \
     op stop interval="0" timeout="15" on-fail="standby" \
     meta migration-threshold="2" failure-timeout="30s" 
target-role="Started"
primitive rseries ocf:Company:rseries \
     params tty="/dev/rseries0" \
     op monitor interval="10" role="Master" timeout="30s" \
     op monitor interval="60" role="Slave" timeout="30s"
ms rseries_ms rseries \
     meta master-max="1" master-node-max="1" clone-max="2" 
clone-node-max="1" target-role="Master"
clone GatewayStatusClone GatewayStatus

colocation rsc-like-master inf: ResourceCustom rseries_ms:Master
order rsc-after-rseries inf: rseries_ms:promote ResourceCustom:start

-------------------------------------------------------------------------------------------------

============
Last updated: Fri Jul 20 16:43:50 2012
Last change: Fri Jul 20 16:11:15 2012 via cibadmin on cluster_01
Stack: openais
Current DC: cluster_01 - partition with quorum
Version: 1.1.6.1-3.el5-0c7312c689715e096b716419e2ebc12b57962052
2 Nodes configured, 2 expected votes
5 Resources configured.
============

Online: [ cluster_01 cluster_02 ]

  ResourceCustom    (ocf::Company:resourcecustom):    Started cluster_01
  Master/Slave Set: rseries_ms [rseries]
      Masters: [ cluster_01 ]
      Slaves: [ cluster_02 ]
  Clone Set: GatewayStatusClone [GatewayStatus]
      Started: [ cluster_01 cluster_02 ]


------------------------------------------------------------------------------------------


Now since I have the GatewayStatus, can I configure the cluster telling 
it that IF the network fails I want ResourceCustom, rseries:Master and 
Gateway to be together? I ask because when I tried putting 
GatewayStatusClone in the colocation... havoc happened... and nothing 
worked. did I do something wrong and it should be the right configuration?

thanks

On 07/20/2012 02:14 PM, David Vossel wrote:
> ----- Original Message -----
>> From: "Matteo Bignotti" <mbignotti at switchvox.com>
>> To: pacemaker at oss.clusterlabs.org
>> Sent: Friday, July 20, 2012 4:01:26 PM
>> Subject: [Pacemaker] Pull the plug on one node, the resource doesn't promote the other node to master
>>
>> Hi guys,
>>
>> I am having trouble understanding why this happens:
>>
>> I have this cluster with 2 nodes, when I put one node in standby or
>> crash the resource, it correctly promotes on the second machine as
>> master.
>> But if I UNPLUG the first machine from the network, the resource
>> won't
>> promote the other one to master.
>>
>> I am using corosync/pacemaker
>>
>> why is that?
> Are you using stonith?  If node1 disappears, pacemaker has to have some sort of guarantee from a fencing device that it is in fact gone before the promotion happens.
>
> This situation (unplugging node) differs from standby and the rsc crash because pacemaker still knows the state of node1 with after the standby/rsc crash.  If the state of node1 can't be verified (unplugged from network), it needs to be fenced before the cluster can continue.
>
> If you are still having trouble, upload a crm_report and we'll have a look.
>
> -- Vossel
>
>> thanks
>>
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