[Pacemaker] SNMP/SMTP alerts on move or STONITH?

[Vadym Chepkov]

On May 24, 2010, at 10:05 AM, Simpson, John R wrote:

> Greetings all,
>  
>      First, my compliments to the Pacemaker and Corosync developers.  I’ve been trying out Pacemaker for the past few months, and (especially from the command line) I’ve found building and managing Pacemaker-based clusters more intuitive and flexible than RHCS.
>  
>      Is there any way to generate SNMP traps and/or email notifications when a resource is moved or a node is STONITH’d?  
>  
>      Using the Pacemaker resource agent ClusterMon to run crm_mon I receive the start, stop, and monitor notifications I expect, but there are no specific notifications when a resource is moved or a node is killed.  I’d like to send up a giant red flag when one of these major events occurs, rather than having to derive it from start/stop/monitor alerts (i.e. all the resources usually hosted on node01 suddenly started and were monitored on node02 – node01 must have been stonith’d).  I’m using the external/ssh stonith agent for lab tests, if that is a factor.
>  
>      I’m using the following ClusterMon configuration and Pacemaker / Corosync / SNMP versions:
>  
> primitive Monitor-Cluster ocf:pacemaker:ClusterMon \
>         params htmlfile="/var/www/html/rlb-cluster-monitor.html" \
>         params pidfile="/var/run/rlb-cluster-monitor.pid" \
>         params extra_options="--mail-host=outbound.msg.reyrey.net:25 --mail-from=john_simpson at reyrey.com --mail-to=john_simpson at reyrey.com --snmp-traps=10.205.1.18" \
>         op start interval="0" timeout="90s" \
>         op stop interval="0" timeout="100s"
>  
> pacemaker-libs-devel-1.0.8-3.el5
> pacemaker-libs-1.0.8-3.el5 is
> pacemaker-1.0.8-3.el5
> corosynclib-1.2.0-1.el5
> corosync-1.2.0-1.el5
> corosynclib-devel-1.2.0-1.el5
> net-snmp-libs-5.3.2.2-7.el5_4.2
> net-snmp-5.3.2.2-7.el5_4.2
>  
> Best regards,
>  
> John
> John Simpson 
> Senior Software Engineer, I. T. Engineering and Operations
> 

Ironically, pacemaker does not provide self-monitoring facilities, at least I wasn't able to find anything usable.
I strongly suggest you to disable --mail-to feature of crm_mon, because you will induce a DoS attack on your mail server. 
You will be flooded with pretty much useless e-mails (http://developerbugs.linux-foundation.org/show_bug.cgi?id=2313) 
Also crm_mon is not usable with nagios at the moment (http://developerbugs.linux-foundation.org/show_bug.cgi?id=2344)
Your best bet is either write a cron script or a "Dummy" derived resource agent that would parse 'crm resource status' output or
 create a MailTo resource for each single leaf node and accompanied collocation/ordering constraints.

If there is another "native" way to get nagios-like notifications to my pager, I would be happy to know them as well.

Vadym


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