[Linux-HA] Getting two drbd resources to run as master on same host

Andrew Beekhof beekhof at gmail.com
Thu Sep 13 06:01:29 MDT 2007


On 8/24/07, Martin Bene <martin.bene at icomedias.com> wrote:
> Hi,
>
> I've got a heartbeat 2.1.2 cluster with two nodes and two drbd resources
> set up as described on
> http://wiki.linux-ha.org/DRBD/HowTov2?highlight=%28drbd%29:
>
> Drbd0 prefers to run as master on node1, drbd1 prefers to run as master
> on node2
>
> There's a resource group "web" that uses drbd1
> <rsc_order id="drbd_web_before_web" from="web" action="start"
> to="drbd_web" to_action="promote"/>
>
> Can I just add
>
> <rsc_order id="drbd_cache_before_web" from="web" action="start"
> to="drbd_cache" to_action="promote"/>
>
> To make the web group require both drbd resources to be in master state?

basically, yes

> If not: how hould I specify this requirement correnctly?
>
> Next, I need to make sure that drbd2 always runs as master on the same
> node as drbd1. would this colocation rule work?
>
> <rsc_colocation id="cache_on_drbd_web" to="drbd_web" to_role="master"
> from="drbd_cache" from_role="master" score="infinity"/>

it should

> Thanks for any hints you can give!
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