[Pacemaker] primary does not run alone

[Lars Ellenberg]

On Fri, Oct 07, 2011 at 11:29:57PM +0200, Andreas Kurz wrote:
> Hello,
> 
> On 10/07/2011 04:51 AM, H.Nakai wrote:
> > Hi, I'm from Japan, in trouble.
> > In the case blow, server which was primary
> > sometimes do not run drbd/heartbeat.
> > 
> > Server A(primary), Server B(secondary) is running.
> > Shutdown A and immediately Shutdown B.
> > Switch on only A, it dose not run drbd/heartbeat.
> > 
> > It may happen when one server was broken.
> > 
> > I'm using,
> > drbd83-8.3.8-1.el5
> > heartbeat-3.0.5-1.1.el5
> > pacemaker-1.0.11-1.2.el5
> > resource-agents-3.9.2-1.1.el5
> > centos5.6
> > Servers are using two LANs(eth0, eth1) and not using serial cable.
> > 
> > I checked /usr/lib/ocf/resource.d/linbit/drbd,
> > and insert some debug codes.
> > At drbd_stop(), in while loop,
> > only when "Unconfigured", break and call maybe_outdate_self().
> > But sometimes, $OCF_RESKEY_CRM_meta_notify_master_uname or
> > $OCF_RESKEY_CRM_meta_notify_promote_uname are not null.
> > So, at maybe_outdate_self(), it is going to set "outdate".
> > And, it always show warning messages below. But, "outdated" flag is set.
> > "State change failed: Disk state is lower than outdated"
> > " state = { cs:StandAlone ro:Secondary/Unknown ds:Diskless/DUnknown r--- }"
> > "wanted = { cs:StandAlone ro:Secondary/Unknown ds:Outdated/DUnknown r--- }"

those are expected and harmless, even though I admit they are annoying.

> > I do not want to be set outdated flag, when shutdown both of them.
> > I want to know what program set $OCF_RESKEY_CRM_* variables,
> > with what condition set these variables,
> > and when these variables are set.
> 
> you need a newer OCF resource agent, at least from DRBD 8.3.9. There was
> the new parameter "stop_outdates_secondary" (defaults to true)
> introduced ... set this to false to change the behavior of your setup
> and be warned: this increases the change to come up with old (outdated)
> data.

BTW, that default has changed to false,
because of a bug in some version of pacemaker,
which got the environment for stop operations wrong.
pacemaker 1.0.11 is ok again, iirc.

Anyways, if you simply go to DRBD 8.3.11, you should be good.
If you want only the agent script, grab it there:
http://git.drbd.org/drbd-8.3.git/?a=blob_plain;f=scripts/drbd.ocf

-- 
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com