[Pacemaker] Pacemaker 1.0.8 and -INFINITY master score

[Dejan Muhamedagic]

Hi,

On Fri, Aug 13, 2010 at 09:25:08AM -0700, Bob Schatz wrote:
> Dejan,
> 
> Thanks for the quick response!
> 
> Comments below with [BS]
> 
> ----- Original Message ----
> From: Dejan Muhamedagic <dejanmm at fastmail.fm>
> To: The Pacemaker cluster resource manager <pacemaker at oss.clusterlabs.org>
> Sent: Fri, August 13, 2010 3:03:49 AM
> Subject: Re: [Pacemaker] Pacemaker 1.0.8 and -INFINITY master score
> 
> Hi,
> 
> On Thu, Aug 12, 2010 at 12:54:10PM -0700, Bob Schatz wrote:
> > I upgraded to Pacemaker 1.0.8 since my application consists of Master/Slave 
> > resources and I wanted to pick up the fix for setting negative master scores.
> 
> Why not to 1.0.9.1?
> 
> 
> [BS] Because when I checked the 
> link http://www.clusterlabs.org/wiki/Get_Pacemaker 
>          it seemed to indicated that 1.0.8 was the last one fully tested with 
> the rest of the stack
>          (heartbeat, etc).   Are there fixes in 1.0.9 in this area?

Not sure, but I think so. The text is outdated.

> I generally 
> am conservative about
> upgrading HA software until it has been out a while.  :)

That's also OK, unless you need some bug fix.

> > I am now able to set negative master scores when a resources starts and is 
> >SLAVE 
> >
> > but can't be promoted.  (The reason I want this is the process needs an 
> > administrative override and has to be up and running for the administrative 
> > override.)
> > 
> > However, when I test this on a one node cluster I see that the resource loops 
> > through the cycle (attempt promote, timeout, stop the resource, start the 
> > resource, ...).
> > 
> > I would have thought that a master score of -INFINITY would have prevented the 
> 
> > promotion.
> 
> Yes, sounds like it. Where is the score set? Wouldn't "resource
> demote" do the right thing?
> 
> [BS] I used the ~October 2009 DRBD agent as a reference.  The "crm_master -Q -l 
> reboot -v -10"
>         call is made at the end of the start() entry point in the agent.
>          I am not sure what you mean by "resource demote"

demote is the opposite of promote.

Thanks,

Dejan