On Sun, Jan 22, 2017 at 09:18:45AM +1300, Brady, Mike wrote: > I am doing some testing with drbd9 and drbdmanage and am seeing some > behaviour that I do not understand. > > I have three nodes in a cluster. Node names are kvm09, kvm10 and > kvm11. kvm09 is the leader. All three systems are up to date Centos > 7.3 with drbd 9.0.6, drbd-utils 8.9.10 and drbdmanage 0.98.2 > > If I shutdown a node, drbdmanage commands executed on the leader now > take a "long time" to complete. >
Yes, that is correct. So far the leader tries to "ping" (not ICMP, a drbdmanage protocol ping) the satellites relatively often. That is done so that satellite nodes know who their leader is (they don't have that information otherwise). Too long TCP timeouts and a clumsy "always ping them even if you know the node is gone" lead to that behavior you describe. That was changed with a commit named "ping service: Don't hang if nodes leave", which should be in the next release, which should happen this week. Regards, rck _______________________________________________ drbd-user mailing list [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user
