On 01/22/2013 08:29 PM, Alex Sudakar wrote: > Hi Dima, > >>> With only two nodes comprising the cluster I believe a quorum is >>> impossible, so I've set no-quorum-policy to 'ignore'. However I was >>> wondering if there is a possibility of using one or more 'tie breaker' >>> devices/resources to determine a proper quorum? I _think_ I've seen >>> mention of such a thing in passing in this list; I'm not sure. >> >> I simply grep for 'link detected' in the output of `ethtool eth0` -- if >> it's not there, the node is off-line and can shoot itself. (Although I >> don't do that: it's off the net, it's not bothering anyone, and I have >> nagios elsewhere monitoring the hosts. If the link comes back on its >> own, that could cause a problem, but that hasn't happened to me yet.) > > I imagine other things could block network connectivity for one of the > nodes, outside of the machine itself - a switch or hub failure? Which > wouldn't be detected by running ethtool locally. > > But it's a good check to run regardless, thanks!
A stray iptables rule would knock you out without dropping the link layer. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
