On Sat, 2018-06-02 at 22:14 +0800, Confidential Company wrote: > On Fri, 2018-06-01 at 22:58 +0800, Confidential Company wrote: > > Hi, > > > > I have two-node active/passive setup. My goal is to failover a > > resource once a Node goes down with minimal downtime as possible. > > Based on my testing, when Node1 goes down it failover to Node2. If > > Node1 goes up after link reconnection (reconnect physical cable), > > resource failback to Node1 even though I configured resource- > > stickiness. Is there something wrong with configuration below? > > > > #service firewalld stop > > #vi /etc/hosts --> 192.168.10.121 (Node1) / 192.168.10.122 (Node2) > -- > > ----------- Private Network (Direct connect) > > #systemctl start pcsd.service > > #systemctl enable pcsd.service > > #passwd hacluster --> define pw > > #pcs cluster auth Node1 Node2 > > #pcs setup --name Cluster Node1 Node2 > > #pcs cluster start -all > > #pcs property set stonith-enabled=false > > #pcs resource create ClusterIP ocf:heartbeat:IPaddr2 > > ip=192.168.10.123 cidr_netmask=32 op monitor interval=30s > > #pcs resource defaults resource-stickiness=100 > > > > Regards, > > imnotarobot > > Your configuration is correct, but keep in mind scores of all kinds > will be added together to determine where the final placement is. > > In this case, I'd check that you don't have any constraints with a > higher score preferring the other node. For example, if you > previously > did a "move" or "ban" from the command line, that adds a constraint > that has to be removed manually if you no longer want it. > -- > Ken Gaillot <kgail...@redhat.com> > > > >>>>>>>>>> > I'm confused. constraint from what I think means there's a preferred > node. But if I want my resources not to have a preferred node is that > possible? > > Regards, > imnotarobot
Yes, that's one type of constraint -- but you may not have realized you added one if you ran something like "pcs resource move", which is a way of saying there's a preferred node. There are a variety of other constraints. For example, as you add more resources, you might say that resource A can't run on the same node as resource B, and if that constraint's score is higher than the stickiness, A might move if B starts on its node. To see your existing constraints using pcs, run "pcs constraint show". If there are any you don't want, you can remove them with various pcs commands. -- Ken Gaillot <kgail...@redhat.com> _______________________________________________ Users mailing list: Users@clusterlabs.org https://lists.clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org