[Pacemaker] [Question]About the recovery procedure from the state that a node was divided.

[Andrew Beekhof]

On Thu, Nov 4, 2010 at 2:44 AM,  <renayama19661014 at ybb.ne.jp> wrote:
> Hi All,
>
> We tested it about the recovery procedure from the state that a node was divided.
> (As for four nodes, three nodes are active, and one node is constitution of the standby.)
>
> It is the restoration from a state divided by two nodes that we set in no-quorum-policy="freeze".
>
> The resource keeps a state as is after it was divided in the case of freeze setting.
> (We tested it using special RA to evade that recognition of the division of the node of ccm was late
> in Heartbeat.)
>
>
> We confirmed some patterns to recovery.
> And we thought that the next method was desirable.
>
> * The first method. (By this method, all resources do not stop.)
>  Step1) Stop all the divided nodes of the one side.
>  Step2) Break off the problem that a node divided.(For example, change a network card.)
>  Step3) Make "/var/lib/heartbeat/crm/" clean.
>        Make it clean in the node that stopped.
>  Step4) Start two nodes that stopped.
>  Step5) A cluster is rebuilt.
>
> * The second method. (But, all resources stop when we take this method)
>  Step1) Stop all four nodes.
>  Step2) Break off the problem that a node divided.(For example, change a network card.)
>  Step3) Make "/var/lib/heartbeat/crm/" clean.
>        Make it clean in all nodes
>  Step4) Start all four nodes.
>  Step5) Send cib information to a cluster.
>  Step6) A cluster is rebuilt.
>
>
> We do not want to take the second method.
> Because, all resources stop when we take second method.
>
> Is not there a problem in the first method that we took?

Step 3 should not be necessary, but otherwise there is nothing wrong
with the first method.
That usage is essentially what it was designed for.

Hope that answers your question.

>
> Is there a method to recommend by a recovery method of the division from freeze setting as community?
>
> Best Regards,
> Hideo Yamauchi.
>
>
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