[Pacemaker] active-active setup with crm clone and load balancing

[Dejan Muhamedagic]

Hi,

On Sun, Jun 06, 2010 at 03:11:10PM +0200, Tomas Kouba wrote:
> Hello all,
> 
> I am running a simple information system that does not need to have
> a backend storage.
> I would like to run it in two instances on two nodes and have them in
> high available and load balancing setup. So the behaviour would be
> that both nodes share one IP address and requests are load balanced.
> I can achieve this with configuration number one (see below).
> 
> The second part of the behavior would be that if one node dies
> all requests would be served by the one node that survived.
> I can achieve this with configuration number two.

No experience with clusterip but wouldn't the first configuration
do? If one node dies, that IP address clone instance is gone too
and all requests will be served from the remaining one.

Also, are you sure that they are globally unique?

Thanks,

Dejan

> My problem is that I cannot achieve both steps in one configuration.
> 
> I have followed the apache setup described in the Cluster_from_Scratch.pdf
> but I must have missed some step. Configuration number one looks like this:
> 
> # crm configure show
> node sbdii1.farm.particle.cz
> node sbdii2.farm.particle.cz
> primitive sbdii12ip ocf:heartbeat:IPaddr2 \
>         params ip="147.231.25.43" cidr_netmask="24"
> clusterip_hash="sourceip" \
>         op monitor interval="10s"
> clone sbdiiIP sbdii12ip \
>         meta globally-unique="true" clone-max="2" clone-node-max="1"
> property $id="cib-bootstrap-options" \
>         dc-version="1.0.8-9881a7350d6182bae9e8e557cf20a3cc5dac3ee7" \
>         cluster-infrastructure="openais" \
>         expected-quorum-votes="2" \
>         stonith-enabled="false" \
>         no-quorum-policy="ignore"
> 
> 
> Configuration number two:
> 
> # crm configure show
> node sbdii1.farm.particle.cz
> node sbdii2.farm.particle.cz
> primitive sbdii12ip ocf:heartbeat:IPaddr2 \
>         params ip="147.231.25.43" cidr_netmask="24"
> clusterip_hash="sourceip" \
>         op monitor interval="10s"
> clone sbdiiIP sbdii12ip \
>         meta globally-unique="true" clone-max="2" clone-node-max="2"
> property $id="cib-bootstrap-options" \
>         dc-version="1.0.8-9881a7350d6182bae9e8e557cf20a3cc5dac3ee7" \
>         cluster-infrastructure="openais" \
>         expected-quorum-votes="2" \
>         stonith-enabled="false" \
>         no-quorum-policy="ignore"
> 
> 
> Thank you for any help,
> 
> --
> Tomas Kouba
> 
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