[Pacemaker] unexpected demote request on master

[K Mehta]

So is globally-unique=false correct in my case ?


On Tue, May 27, 2014 at 5:30 AM, Andrew Beekhof <andrew at beekhof.net> wrote:

>
> On 26 May 2014, at 9:56 pm, K Mehta <kiranmehta1981 at gmail.com> wrote:
>
> > What I understand from "globally-unique=false" is as follows
> > Agent handling the resource does exactly same processing on all nodes.
> For processing this resource, agent on all nodes will use exactly same
> resources (files, processes, same parameters to agent entry points, etc).
> >
> > In case of my resource, agent on all nodes execute same "command" to
> find score.
> > Driver present on all nodes will make sure that the node that is to be
> promoted is the one that reports highest score as output of the "command".
> Score is reported to CM using ( /usr/sbin/crm_master -Q -l reboot -v
> $score) in monitor entry point. Until this score
> > is reported, agent on other node will just delete the score using
> /usr/sbin/crm_master -Q -l reboot -D in monitor entry point
> >
> >
> >
> >
> > I want to make sure that the resource does not run on nodes other than
> $node1 and $node2. To achieve this i use the following commands.
> >
> >         pcs -f $CLUSTER_CREATE_LOG constraint  location vha-${uuid}
>  prefers $node1
> >         pcs -f $CLUSTER_CREATE_LOG constraint  location vha-${uuid}
>  prefers $node2
> >         pcs -f $CLUSTER_CREATE_LOG constraint  location ms-${uuid}
>  prefers $node1
> >         pcs -f $CLUSTER_CREATE_LOG constraint  location ms-${uuid}
>  prefers $node2
> >
> > Any issue here ?
>
> Perhaps this is not intuitive but you'd need to specify 'avoids'
> constraints for the nodes it must not run on.
> 'prefers' only says that of all the available nodes, this one is the best.
>
> >
> > Regards,
> >  Kiran
> >
> >
> >
> > On Mon, May 26, 2014 at 8:54 AM, Andrew Beekhof <andrew at beekhof.net>
> wrote:
> >
> > On 22 May 2014, at 11:20 pm, K Mehta <kiranmehta1981 at gmail.com> wrote:
> >
> > > > May 13 01:38:36 vsanqa28 pengine[4310]:   notice: LogActions:
> Promote vha-924bf029-93a2-41a0-adcf-f1c1a42956e5:0#011(Slave -> Master
> vsanqa28)
> > > > May 13 01:38:36 vsanqa28 pengine[4310]:   notice: LogActions: Demote
>  vha-924bf029-93a2-41a0-adcf-f1c1a42956e5:1#011(Master -> Slave vsanqa27)
>  <<<<< Why did this happen ?
> > >
> > > attach the file mentioned on the next line and we might be able to
> find out
> > >
> >
> > Quick question, do you understand what globally-unique=false means and
> are you sure you want it?
> > If the answer is 'yes and yes', are you sure that your agent is using
> crm_master correctly?
> >
> > If I run, 'tools/crm_simulate -Sx ~/Downloads/pe-input-818.bz2 -s | grep
> vha-924bf029-93a2-41a0-adcf-f1c1a42956e5', I see:
> >
> > vha-924bf029-93a2-41a0-adcf-f1c1a42956e5:0 promotion score on vsanqa28:
> INFINITY
> > vha-924bf029-93a2-41a0-adcf-f1c1a42956e5:1 promotion score on vsanqa27: 2
> >
> >
> > Although much of the 'INFINITY' is probably from:
> >
> >       <rsc_location
> id="location-ms-924bf029-93a2-41a0-adcf-f1c1a42956e5-vsanqa28-INFINITY"
> node="vsanqa28" rsc="ms-924bf029-93a2-41a0-adcf-f1c1a42956e5"
> score="INFINITY"/>
> >
> > This is somewhat odd to include for a clone/master resource.
> >
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