[ClusterLabs] Multiple apache services running
kgaillot at redhat.com
Tue Aug 4 13:16:11 EDT 2015
On 08/04/2015 07:49 AM, Vijay Partha wrote:
> on-fail="restart" is not working.
In what way?
Your logs will generally point you in the right direction. You should be
able to see whether Pacemaker detected a failure, whether it tried to
execute the resource agent, and what value the resource agent returned.
Figuring out which of those steps failed will help you figure out how to
> On Wed, Jul 29, 2015 at 7:26 PM, Ken Gaillot <kgaillot at redhat.com> wrote:
>> On 07/29/2015 08:05 AM, Vijay Partha wrote:
>>> Victor, Whatever you said i had tried and got it working. Thank you.
>>> Could you guys answer the following questions please?
>>> 1.) I have 2 apache services running on the same node. If the services go
>>> down can pacemaker restart it?
>> Yes, that's what pacemaker is for :)
>> If by two services you mean two server instances of apache, then you
>> would configure two apache resources in pacemaker. If you mean two web
>> apps running in one apache server, you'd configure one apache resource
>> in pacemaker.
>> You would also need a monitor operation, which tells pacemaker to
>> periodically check the health of the service.
>> The migration-threshold and on-fail options determine what the cluster
>> does on failure. See the documentation for possible values, but the
>> default behavior is to try to restart the service on the same node.
>> The documentation for all the options is at
>>> 2.) I have 2 apache services running on different nodes. Can i control
>>> the resources from a single node by making use of pacemaker?
>> The various cluster tools work from any node, to affect any or all
>> nodes. Most commonly you'd use one of the high-level cluster shells
>> (crmsh or pcs). They have commands to enable/disable a resource, move a
>> resource to a different node, put a node in standby mode, etc.
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