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2.5. 測試資源配置
在〈節 2.4, “透過 pcs 指令來建立資源和資源群組”〉中顯示的叢集狀態裡,所有資源皆在節點
z1.example.com 上執行。您可藉由使用下列程序來將第一個節點設為 standby 模式(在這之後該節點將無法再為資源提供服務),以測試資源群組是否會備援至節點 z2.example.com。
- 下列指令會使
z1.example.com節點進入standby模式中。root@z1 ~]#
pcs cluster standby z1.example.com - 在將
z1節點設為 standby 模式後,請檢查叢集狀態。請注意,所有資源現在都應在z2上運作。[root@z1 ~]#
pcs statusCluster name: my_cluster Last updated: Wed Jul 31 17:16:17 2013 Last change: Wed Jul 31 17:18:34 2013 via crm_attribute on z1.example.com Stack: corosync Current DC: z2.example.com (2) - partition with quorum Version: 1.1.10-5.el7-9abe687 2 Nodes configured 6 Resources configured Node z1.example.com (1): standby Online: [ z2.example.com ] Full list of resources: myapc (stonith:fence_apc_snmp): Started z1.example.com Resource Group: apachegroup my_lvm (ocf::heartbeat:LVM): Started z2.example.com my_fs (ocf::heartbeat:Filesystem): Started z2.example.com VirtualIP (ocf::heartbeat:IPaddr2): Started z2.example.com Website (ocf::heartbeat:apache): Started z2.example.com所定義之 IP 位址的網站應該會繼續顯示而不會受到干擾。 - 若要使
z1從standby模式中退出,請執行下列指令。root@z1 ~]#
pcs cluster unstandby z1.example.com注意
將節點退出standby模式不會造成資源備援至該節點。欲取得有關於如何控制資源能在哪個節點上執行,請參閱《Red Hat High Availability Add-On 參照指南》中有關於配置叢集資源的章節。

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