[ClusterLabs] Good idea to enable Pacemaker blackbox by default?
andrew at beekhof.net
Mon Jun 1 20:41:43 EDT 2015
> On 28 May 2015, at 12:00 am, Chuck Carmack <carmack at us.ibm.com> wrote:
> ----- Forwarded by Chuck Carmack/Rochester/IBM on 05/27/2015 08:35 AM -----
> From: Chuck Carmack/Rochester/IBM
> To: users at clusterlabs.org
> Date: 05/22/2015 07:31 AM
> Subject: Good idea to enable Pacemaker blackbox by default?
> Hi, thanks for the answers. Yes I'm thinking about auto-dumping. Would this dump every time pacemaker detects any error, such as a timeout, resource agent error, resource agent in wrong state, etc?
any time you see an error level message in the logs.
> Or does it only dump for pacemaker internal errors? I don't want frequent auto-dumping.
> I'm looking for a way to debug problems that can't be debugged with /var/log/messages.
Have you tried looking in the pacemaker log file? That always has more than /var/log/messages
Have you seen http://blog.clusterlabs.org/blog/2013/pacemaker-logging/ ?
> If most problems can be debugged with /var/log/messages then maybe default blackbox isn't worth it.es
> Can you say if the performance impact will be noticeable?
I’ve not done a comparison recently.
> > On 14 May 2015, at 4:17 am, Chuck Carmack <carmack at us.ibm.com> wrote:
> > Hi -
> > I'm thinking of enabling the blackbox by default in production environments (ie. customer env). This seems like a good way to capture detailed debug logs at the time of error, without enabling debug logging all the time. I would have a cron job to prune /var/lib/pacemaker/blackbox in case too many files are generated.
> Ah, you’re talking about the auto-dumping when we log an error?
> > Is there a reason this is *not* a good idea? Does blackbox impact cluster performance?
> There will be some impact, all the arguments need to be marshalled etc. _______________________________________________
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