--On Monday, November 15, 2010 08:40:45 AM -0700 Rick Cone <rc...@securepaymentsystems.com> wrote:
> In production I am planning to have 2 separate AP7900 units each plugged > into 2 different APC UPS units to achieve that. I would then have the > single node name on each, for each of the 2 PS's on the individual > systems. So for this setup, you would have to trigger two stonith devices, one for each AP7900, with identical node names. Only after both succeeded would you be able to consider the node to be dead. Correct? I don't recall reading anything in the pacemaker et al documentation that would cover this case. I was under the impression that after one stonith resource is successfully invoked, the node would be considered to be offline. If so, I'd be suspicious about assuming both PDUs would get activated without further investigation and testing. (I don't think that you could consider two node names on one PDU to be equivalent to one on each of two PDUs.) I think that in such a case you'd also have to ensure that your stonith action is poweroff rather than reset, or your node may not actually lose power (although you could mitigate that likelihood by configuring a longer reset time in the PDU). However, while I've written RAs before, I've never looked at the stonith logic, so I could be completely out to lunch. It sounds like an interesting edge case, and edge cases make me nervous :) Devin _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
