crm_mon emails on STONITH

With the new email features in the most recent crm_mon daemon, it shouldn’t be too difficult to get a service set up so that Nagios will alert us when a stonith event happens, and maybe even some details about why.

It’ll take much longer for me to decide on what WAV file should play in my office when that event gets triggered. I’m really torn between an extremely loud “Boom, HEADSHOT!,” or the first few lines of “I shot the sheriff…”, or “Hey, Man, Nice Shot”, and maybe even “Karma Police” …

This thread, and all the other short bursts (heh) of posting about STONITH, are just to bookmark these hints and details in a way that I’ll remember at 3am when I’m troubleshooting something two years from now. Also, the lack of community documentation on the internets about the pitfalls of high availability with sles11 is sad.

Also discovered today: clvmd really prefers if you have a node id set in openais.conf (to the point of failing for obscure reasons that ends with the “haves” shooting the “have-nots”), and in SLES11 the stock Xen hypervisor kernel doesn’t automatically load the dlm module (although it is installed) unless you also install ocfs2, even if you’re not intending to actually use ocfs2.