红帽全球峰会23.2. Setting the shutdown-lock cluster property
The following example sets the shutdown-lock cluster property to true in an example cluster and shows the effect this has when the node is shut down and started again. This example cluster consists of three nodes: z1.example.com, z2.example.com, and z3.example.com.
Procedure
Set the
shutdown-lockproperty to totrueand verify its value. In this example theshutdown-lock-limitproperty maintains its default value of 0.[root@z3 ~]# pcs property set shutdown-lock=true [root@z3 ~]# pcs property list --all | grep shutdown-lock shutdown-lock: true shutdown-lock-limit: 0Check the status of the cluster. In this example, resources
thirdandfifthare running onz1.example.com.[root@z3 ~]# pcs status ... Full List of Resources: ... * first (ocf::pacemaker:Dummy): Started z3.example.com * second (ocf::pacemaker:Dummy): Started z2.example.com * third (ocf::pacemaker:Dummy): Started z1.example.com * fourth (ocf::pacemaker:Dummy): Started z2.example.com * fifth (ocf::pacemaker:Dummy): Started z1.example.com ...Shut down
z1.example.com, which will stop the resources that are running on that node.[root@z3 ~] # pcs cluster stop z1.example.com Stopping Cluster (pacemaker)... Stopping Cluster (corosync)...Running the
pcs statuscommand shows that nodez1.example.comis offline and that the resources that had been running onz1.example.comareLOCKEDwhile the node is down.[root@z3 ~]# pcs status ... Node List: * Online: [ z2.example.com z3.example.com ] * OFFLINE: [ z1.example.com ] Full List of Resources: ... * first (ocf::pacemaker:Dummy): Started z3.example.com * second (ocf::pacemaker:Dummy): Started z2.example.com * third (ocf::pacemaker:Dummy): Stopped z1.example.com (LOCKED) * fourth (ocf::pacemaker:Dummy): Started z3.example.com * fifth (ocf::pacemaker:Dummy): Stopped z1.example.com (LOCKED) ...Start cluster services again on
z1.example.comso that it rejoins the cluster. Locked resources should get started on that node, although once they start they will not not necessarily remain on the same node.[root@z3 ~]# pcs cluster start z1.example.com Starting Cluster...In this example, resouces
thirdandfifthare recovered on nodez1.example.com.[root@z3 ~]# pcs status ... Node List: * Online: [ z1.example.com z2.example.com z3.example.com ] Full List of Resources: .. * first (ocf::pacemaker:Dummy): Started z3.example.com * second (ocf::pacemaker:Dummy): Started z2.example.com * third (ocf::pacemaker:Dummy): Started z1.example.com * fourth (ocf::pacemaker:Dummy): Started z3.example.com * fifth (ocf::pacemaker:Dummy): Started z1.example.com ...
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