[Pacemaker] Stonith Device APC AP7900

Dejan Muhamedagic dejanmm at fastmail.fm
Wed Nov 3 06:22:41 EDT 2010 

Hi,

On Tue, Nov 02, 2010 at 05:20:07PM -0600, Rick Cone wrote:
> Dejan,
> 
> I tested the AP7900 with the stonith command turning 2 outlets with the same
> name on and off (about 20 times), and I can't get it to fail.  I'm not sure
> what to think, I guess.  Perhaps I'll just use 1 outlet with the node name,
> with a power splitter to the 2 redundant power supplies to reduce the
> chances of problems.

Perhaps a temporary quirk in the device?

Thanks,

Dejan

> Rick
> 
> -----Original Message-----
> From: Dejan Muhamedagic [mailto:dejanmm at fastmail.fm] 
> Sent: Thursday, October 28, 2010 9:16 AM
> To: rcone at securepaymentsystems.com; The Pacemaker cluster resource manager
> Subject: Re: [Pacemaker] Stonith Device APC AP7900
> 
> Hi,
> 
> On Thu, Oct 28, 2010 at 08:35:30AM -0600, Rick Cone wrote:
> > Dejan,
> > 
> > Sorry to confuse. I just assumed a script would be issued or new version,
> > etc.
> > 
> > I do apologize for this though.
> 
> No problems.
> 
> > As fate would have it, I did just so happen
> > see an issue (while testing something else) concerning the AP7900 using
> > apcmastersnmp, just yesterday.  You may want to let me know if what I'm
> > doing is non-standard or improper:
> > 
> > I'm using DRBD/Heartbeat/Pacemaker, and my 2 HA systems have dual power
> > supplies.  On the AP7900 I have 1 of the systems plugged into outlets 1
> and
> > 2, and the other system is plugged into outlets 3 and 4.  Both outlets 1
> and
> > 2 have the exact same outlet name, and that is the name of system 1 (uname
> > -n), and outlets 3 and 4 have the exact same outlet name, and that is the
> > name of system 2 (uname -n):
> > 
> > Outlet 1 name: spserv1m
> > Outlet 2 name: spserv1m
> > Outlet 3 name: spserv1s
> > Outlet 4 name: spserv1s
> > 
> > The AP7900 allows identical outlet names.
> > 
> > What I noticed was (during testing) that a "Heartbeat/Pacemaker" attempt
> to
> > stonith system 1, it only shut off Outlet 2, and not both outlets 1 and 2?
> > I had not seen this before.  I certainly have seen it do both system
> outlets
> > in testing, and manually using command line with testing the stonith
> command
> > (early on).
> 
> Yes, according to the code, the apcmastersnmp plugin supports up
> to 8 outlets per node. It's strange that it used to work and now
> doesn't any more. If there are no messages in the logs, I'd
> suggest to turn debug on and try to see what's going on and under
> which circumstances it fails to get all outlets.
> 
> You can do more testing using the stonith command with option -d
> and checking status (-lS). Not sure, but perhaps that should also
> output some outlet information. I guess that doing too many
> resets is not very hardware-friendly.
> 
> > I'm not sure if this is problem, or rather an improper or problematic
> > approach.  I am considering having just 1 outlet having the system name
> and
> > using a splitter or extension cord with multiple outlets for each system.
> > 
> > Just for reference, here is my Pacemaker crm stonith configuration piece:
> > 
> > primitive res_stonith stonith:apcmastersnmp \
> >         params ipaddr="192.1.1.109" port="161" community="sps" \
> >         op start interval="0" timeout="60s" \
> >         op monitor interval="60s" timeout="60s" \
> 
> This monitor is scheduled way too often. Better use something
> like 2h or so.
> 
> >         op stop interval="0" timeout="60s"
> > clone rc_res_stonith res_stonith \
> >         meta target-role="Started"
> 
> You can also use a single instance setup, i.e. without clones.
> 
> Thanks,
> 
> Dejan
> 
> > Thanks,
> > Rick
> > 
> >  
> > 
> >  
> > 
> > -----Original Message-----
> > From: Dejan Muhamedagic [mailto:dejanmm at fastmail.fm] 
> > Sent: Thursday, October 28, 2010 2:37 AM
> > To: 'The Pacemaker cluster resource manager'
> > Subject: Re: [Pacemaker] Stonith Device APC AP7900
> > 
> > On Wed, Oct 27, 2010 at 10:12:03AM -0600, Rick Cone wrote:
> > > The AP7900 does seem to be working properly and tested with the
> > > apcmastersnmp.  I guess you can add it to the list.  What is the change
> > > after it is added to the list?
> > 
> > Not sure if I understand your question. The only difference would
> > be that the warning message is not issued any more.
> > 
> > Thanks,
> > 
> > Dejan
> > 
> > > 
> > > 
> > > 
> > > 
> > > -----Original Message-----
> > > From: Dejan Muhamedagic [mailto:dejanmm at fastmail.fm] 
> > > Sent: Wednesday, October 27, 2010 9:55 AM
> > > To: rcone at securepaymentsystems.com; The Pacemaker cluster resource
> manager
> > > Subject: Re: [Pacemaker] Stonith Device APC AP7900
> > > 
> > > Hi,
> > > 
> > > On Wed, Oct 27, 2010 at 09:11:03AM -0600, Rick Cone wrote:
> > > > I use the APC AP7900 stonith device with apcmastersnmp.  It seems to
> > works
> > > > well, but I see the message in logs:
> > > > 
> > > >  
> > > > 
> > > > Oct 24 04:02:32 spserv1m stonithd: [2885]: WARN: apcmastersnmp_status:
> > > > module not tested with this hardware 'AP7900'.
> > > > 
> > > >  
> > > > 
> > > > Should I be worried about this?
> > > 
> > > Probably not. The author of the plugin made a list of devices
> > > that were tested and issues a warning for a device not in the
> > > list.
> > > 
> > > >  Is there anyway to resolve this or to get
> > > > rid of the message?
> > > 
> > > If you tested the device thoroughly, then we can add it to the
> > > list.
> > > 
> > > Thanks,
> > > 
> > > Dejan
> > > 
> > > > 
> > > >  
> > > > 
> > > > Thanks,
> > > > 
> > > >  
> > > > 
> > > > Rick Cone
> > > > 
> > > >  
> > > > 
> > > >  
> > > > 
> > > >  
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > 
> > > > _______________________________________________
> > > > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> > > > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> > > > 
> > > > Project Home: http://www.clusterlabs.org
> > > > Getting started:
> http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> > > > Bugs:
> > >
> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
> > > 
> > 
> > _______________________________________________
> > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> > 
> > Project Home: http://www.clusterlabs.org
> > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> > Bugs:
> > http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
> > 
> > 
> > _______________________________________________
> > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> > 
> > Project Home: http://www.clusterlabs.org
> > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> > Bugs:
> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>

More information about the Pacemaker mailing list