How much time delay difference is enough ? I'm currently setting the delays at 5s and 15s, dual fencing does disappear, but I'm sure whether the difference is large enough for all situations.
On Mon, Mar 24, 2014 at 8:00 PM, Kristoffer Grönlund <kgronl...@suse.com>wrote: > On Mon, 24 Mar 2014 19:41:16 +0800 > 邓尧 <tors...@gmail.com> wrote: > > > I'm configuring a 2-node cluster on CentOS 6 with corosync + > > pacemaker + cman. Everything works well except fencing. > > > > I'm using IPMI as the fencing device, I know it's not the best fencing > > device, but this is the only option I have. > > Manual fencing a node (pcs stonith fence <node>) works well: peer > > node goes offline, resources migrate as expected. However, if network > > traffic between the two nodes is blocked by iptables, both nodes will > > try to fence each other, and both would success, which result in both > > nodes offline. > > > > How to avoid such problem ? > > You'll need to have one node take priority, by setting different > delays on the two nodes so that one of them will fence before the > other (see the "delay" parameter). > > -- > // Kristoffer Grönlund > // kgronl...@suse.com >
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