[Pacemaker] Help with scsi_reservation on pacemaker

[Andrew Beekhof]

On Thu, Feb 12, 2009 at 15:18, Vit Pelcak <vpelcak at suse.cz> wrote:
> Hi people.
>
> I'd like to ask you for help with some problem.
>
> I have to test scsi_reservation in pacemaker.
>
> Currently, I have two operating systems in vmware + 2 shared disks set
> with scsi_reservation. On each shared disk there is lvm with ext3. Those
> are /dev/datab/datab and /dev/datac/datac.
>
> For configuration I got this xml from colleague:
> <resources>
>      <primitive class="ocf" id="primitive-scsires" provider="heartbeat"
> type="scsi2reservation">
>        <meta_attributes
> id="primitive-scsires-meta_attributes">

>          <nvpair id="nvpair-e6001b42-2803-42b8-98ef-ab00d71a9495"
> name="target-role" value="Stopped"/>

well thats not a good idea, this prevents the resource from being started

>
> </meta_attributes>
>
>        <operations
> id="primitive-scsires-operations">
>
>          <op id="primitive-scsires-op-monitor-20" interval="20"
> name="monitor" timeout="20"/>
>
> </operations>
>
>        <instance_attributes
> id="primitive-scsires-instance_attributes">
>          <nvpair id="nvpair-f67b325b-9114-40cc-8a12-b3eaeed9291e"
> name="scsi_reserve" value="/usr/sbin/scsi_reserve"/>
>          <nvpair id="nvpair-9aa6969b-e28a-4b51-a827-6831344f2fe3"
> name="sharedisk" value="/dev/datab/datab"/>
>          <nvpair id="nvpair-e88e742a-7099-4eab-a03c-e18b6f4d14b5"
> name="start_loop" value="10"/>
>
> </instance_attributes>
>
>
> </primitive>
>
> </resources>
>
> If I understand it well, this should set one resource /dev/datab. But
> how can I add datac resource as depending?

You need to define another resource (presumably with
sharedisk=/dev/datab/datac) and depending on what type of dependancy
you're talking about, create an ordering or colocation constraint
between the two.

> I simply need to test scsi reservation, and I got advised that this is
> the way.
>
> If you find (most probably) this description insufficient, feel free to
> ask for further info.

You might actually be better off asking on the heartbeat list since
the resource you're asking about comes from that project.

>
> Thank you for help.
>
> Regards
> Vit Pelcak
>
>
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