Fixed by using a third node. On Thu, Feb 19, 2015 at 8:26 AM, Adam Błaszczykowski < adam.blaszczykow...@gmail.com> wrote:
> Hello, > I am using Pacemaker 1.1.12 together with Corosync 2.4.3 in my cluster > environment. I have two nodes in cluster that are in different LAN > locations. It may be situation that nodes will not be able to connect with > each other because of network failure. In that situation split brain can > occur if we add new configuration on both nodes but that configuration will > be different on each node. > > 1. After repairing network failure, both nodes will rejoin to cluster, but > there are two different configurations. Which cib configuration will be > used ? Is it possible that configuration on first node will be overwriten > by second node ? > 2. Is there any possibility to use multiple live cib configurations to > prevent from losing configuration in split brain situation ? > > My split brain example: > > 1. Both nodes are up and cib configuration is synced > 2. node1 has vip1 as resource, node2 has vip2 as resource > 3. network failure, nodes cannot sync configuration > 4. admin add vip2 on node1 > 5. second admin add vip3 on node2 (now we have split brain in > configuration) > 6. network failure resolved, nodes are rejoining the cluster > 7. cib configuration is synced and probably we lost configuration from > node1 or node2 > > How to solve this problem ? > > Thank you in advance ! > Best Regards. > Adam Blaszczykowski > > > _______________________________________________ > 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://bugs.clusterlabs.org > > -- ~ Mark Gardner ~ markg...@gmail.com ***
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