[ClusterLabs] Failover IP with Monitoring but not controling the colocated services.

[Klaus Wenninger]

On 09/05/2016 01:38 PM, Stefan Schörghofer wrote:
> Hi List,
>
> I am currently trying to setup the following situation in my lab:
>
> |------------------Cluster IP------------------|
> | HAProxy instances     |    HAProxy instances |
> | Node 1                |               Node 2 |
>
>
>
> Now I've successfully added the Cluster IP resource to pacemaker and
> tested the failover which worked perfectly.
>
> After that I wanted to ensure that all HAProxy instances are running on
> the Node I want to failover to, so I wrote a ocf-compatible script that
> supports all necessary options and added it as resource.
> The script works and monitors the HAProxy incances just fine, it also
> restarts them if some go down but it also stops the haproxy instances
> on the standby Node.
>
> What I want to have is multible Node's where all HAProxy instances are
> permanently running, but if something happens on the primary node the
> Cluster IP should failover to the other (only if the HAProxy instances
> are running there fine).
>
> Is this possible with Pacemake/Corosync? I've read a lot in the
> documentation and found something about resource_clones and also a
> resource-type that uses Nagios Plugins. Maybe there is a way with using
> this?
>
> I tried to setup the clone resource, HAProxy instances where running on
> all nodes.
> I created a colocation rule for the clone resource and the Cluster IP
> and after a manual migration all services where stopped.

Sounds as if the colocation could have the wrong order.
Basically the IP-primitive collocated with the HAProxy clones
should be fine.
Maybe you could paste the config...

Regards,
Klaus

>
> Can I maybe work with multible HAProxy resources (one per node) and
> setup the colocation rule with "ClusterIP coloc with (haproxy_node1 or
> haproxy_node2). Does something like this work?
>
>
> Thanks for your input.
> Best regards,
> Stefan Schörghofer
>
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