[Pacemaker] Help with N+1 configuration

[Cal Heldenbrand]

Would you be able to direct me to some documentation for configuring
STONITH based on my environment?  The Clusters from Scratch document talks
about a fence_ipmilan driver, which I seem to not have on my centos 6
install.   I only show the fence_pcmk driver.

Reading the metadata for fence_pcmk, I don't quite understand how it should
be configured.

Thanks!

--Cal

On Fri, Jul 27, 2012 at 10:56 AM, Phil Frost <phil at macprofessionals.com>wrote:

> On 07/27/2012 11:48 AM, Cal Heldenbrand wrote:
>
>> Why wouldn't my mem3 failover happen if it timed out stopping the cluster
>> IP?
>>
>
> If a stop action fails, pacemaker can't know if the resource is running,
> not running, or in some other broken state. The cluster is in an unknown
> state, and there's no reasonable thing pacemaker can do. Since pacemaker
> thinks a node is broken (it failed to stop a resource, as requested) but
> isn't sure, the solution is to transition to a known state by powering the
> node off, resetting it, or otherwise fencing it. Configure a STONITH
> resource to do this. Without STONITH, your only option is to manually
> address the cause of the failure (high load, in this case), then issue "crm
> resource cleanup ..." on any failed resources to instruct pacemaker that it
> is safe to try again.
>
>
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