[Pacemaker] questions about expected behaviour stonith:meatware

[imnotpc]

On Friday, June 17, 2011 06:49:11 Dejan Muhamedagic wrote:
> On Thu, Jun 16, 2011 at 10:31:44AM -0400, imnotpc wrote:
> > On Thursday, June 16, 2011 09:28:20 Dejan Muhamedagic wrote:
> > > On Thu, Jun 16, 2011 at 07:32:30AM -0400, imnotpc wrote:
> > > > On Thursday, June 16, 2011 02:38:51 Florian Haas wrote:
> > > > > On 06/16/2011 12:50 AM, imnotpc wrote:
> > > > > >> Funny but it looks fairly unequivocal to me.
> > > > > > 
> > > > > > Yes and no. The message is clear but unless you have someone
> > > > > > sitting at a console 24/7 running tail on the log file, it has
> > > > > > little value. According to the ClusterLabs stonith docs (which I
> > > > > > just realized you
> > > > > 
> > > > > > wrote, haha):
> > > > > Meatware requires operator intervention, that much is a given.
> > > > > _Notifying_ an operator that intervention is necessary, beyond
> > > > > logging to the console or a log file, is beyond meatware's domain.
> > > > > 
> > > > > However, it's extremely easy to combine meatware with automated
> > > > > monitoring: any time a node is meatware-fencing another, it creates
> > > > > a socket file named /var/run/meatware.<hostname>, where hostname
> > > > > is the name of the node being fenced. Configure your automated
> > > > > monitoring to page an operator any time this file is present, and
> > > > > you've solved the notification problem.
> > > > > 
> > > > > Hope this is useful.
> > > > 
> > > > It was. I had seen mention of that file when I'd run meatclient on a
> > > > node that wasn't DC. That's actually the best idea so far as long as
> > > > you only want notification of fencing since it only exists on the DC
> > > > node. Well, in theory. It turns out I had a few stale files that
> > > > hadn't been deleted and it seems that was the cause of those
> > > > warnings and errors in my log. I still don't get a console message
> > > > but that is of limited value anyway.
> > > 
> > > Perhaps somebody may want to add a send sms or mail feature to
> > > meatware.
> > 
> > Can you tell me where the current dev source code for meatware and MailTo
> > is located? I'd be willing to take a look and see if this is something I
> > could do.
> 
> The repository (mercurial) is at hg.linux-ha.org/glue. meatware
> is in lib/plugins/stonith.
> 
> The resource agents repository (git) is at
> https://github.com/ClusterLabs/resource-agents
> MailTo is in the heartbeat directory.

MailTo is pretty straightforward but I've got a lot to learn about how the 
cluster works and a whole lot of included functions to understand before 
messing with a plugin like meatware. I'll keep this on my ToDo list while I 
learn and get experience.

Jeff