Pacemaker是OpenStack官方推薦的資源管理工具，群集基礎架構利用Coresync提供的信息和成員管理功能來檢測和恢復云端資源級別的故障，達到集群高可用性。Corosync在云端環境中提供集群通訊，主要負責為控制節點提供傳遞心跳信息的作用。 1）在三個節點上安裝以下安裝包 ``` yum install -y lvm2 cifs-utils quota psmisc yum install -y pcs pacemaker corosync fence-agents-all resource-agents crmsh ``` 2）在三個節點上設置pcs服務開機啟動 ``` systemctl enable pcsd.service systemctl start pcsd.service ``` 3）在三個節點上設置hacluster用戶密碼 ``` passwd hacluster New password ####設置密碼為yjscloud Retry new password ``` 4）配置編寫`corosync.conf`文件 ``` vim /etc/corosync/corosync.conf ``` 添加以下內容： ``` totem { version: 2 secauth: off cluster_name: openstack_cluster transport: udpu } nodelist { node { ring0_addr: controller1 nodeid: 1 } node { ring0_addr: controller2 nodeid: 2 } node { ring0_addr: controller3 nodeid: 3 } } quorum { provider: corosync_votequorum } logging { to_logfile: yes logfile: /var/log/cluster/corosync.log to_syslog: yes } ``` 5）在三個節點上設置開機啟動服務 ``` systemctl enable corosync systemctl restart corosync ``` 6）設置集群互相驗證，在controlle1上操作即可 ``` pcs cluster auth controller1 controller2 controller3 -u hacluster -p yjscloud --force ```  7）創建并啟動名為openstack_cluster的集群，在controlle1上操作即可 ``` pcs cluster setup --force --name openstack-cluster controller1 controller2 controller3 ```  8）設置集群開啟啟動并查看狀態，在controlle1上操作即可 ``` pcs cluster enable --all pcs cluster start --all pcs cluster status ```  9）查看并設置集群屬性，在controlle1上操作即可 ``` ps aux |grep pacemaker ``` 10）驗證corosync的安裝及當前corosync的狀態 ``` corosync-cfgtool -s corosync-cmapctl | grep members pcs status corosync ```  11）驗證配置是否正確 ``` controller1# crm_verify -L -V controller1# pcs property set stonith-enabled=false controller1# pcs property set no-quorum-policy=ignore ``` 12）通過crm設置VIP ``` crm(live)configure# primitive vip_piblic ocf:heartbeat:IPaddr2 params ip="192.168.0.168" cidr_netmask="24" nic=eth0 op monitor interval="30s" crm(live)configure# primitive vip_management ocf:heartbeat:IPaddr2 params ip="10.1.1.168" cidr_netmask="24" nic=ens8 op monitor interval="30s" ```