24.2. 设置 shutdown-lock 集群属性

流程

1. 将 shutdown-lock 属性设置为 true 并验证其值。在本例中，shutdown-lock-limit 属性保持其默认值 0。

   [root@z3 ~]# pcs property set shutdown-lock=true
   [root@z3 ~]# pcs property list --all | grep shutdown-lock
    shutdown-lock: true
    shutdown-lock-limit: 0

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2. 检查集群的状态。在本例中，资源 third 和 fifth 运行在 z1.example.com 上。

   [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
   ...

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3. 关闭 z1.example.com，这将停止在该节点上运行的资源。

   [root@z3 ~] # pcs cluster stop z1.example.com
   Stopping Cluster (pacemaker)...
   Stopping Cluster (corosync)...

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4. 运行 pcs status 命令显示节点 z1.example.com 处于离线状态，并且在 z1.example.com 上运行的资源在节点停机时为 LOCKED。

   [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)
   
   ...

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5. 在 z1.example.com 上再次启动集群服务，使其重新加入集群。锁住的资源应该在这个节点上启动，但当它们启动后，它们不一定会停留在同一个节点上。

   [root@z3 ~]# pcs cluster start z1.example.com
   Starting Cluster...

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6. 在本例中，在节点 z1.example.com 上恢复了资源 third 和 fifth。

   [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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