Pacemaker是OpenStack官方推荐的资源管理工具，群集基础架构利用Coresync提供的信息和成员管理功能来检测和恢复云端资源级别的故障，达到集群高可用性。Corosync在云端环境中提供集群通讯，主要负责为控制节点提供传递心跳信息的作用。 1）在三个节点上安装以下安装包 ``` yum install -y lvm2 cifs-utils quota psmisc yum install -y pcs pacemaker corosync fence-agents-all resource-agents crmsh ``` 2）在三个节点上设置pcs服务开机启动 ``` systemctl enable pcsd.service systemctl start pcsd.service ``` 3）在三个节点上设置hacluster用户密码 ``` passwd hacluster New password ####设置密码为yjscloud Retry new password ``` 4）配置编写`corosync.conf`文件 ``` vim /etc/corosync/corosync.conf ``` 添加以下内容： ``` 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）在三个节点上设置开机启动服务 ``` systemctl enable corosync systemctl restart corosync ``` 6）设置集群互相验证，在controlle1上操作即可 ``` pcs cluster auth controller1 controller2 controller3 -u hacluster -p yjscloud --force ```  7）创建并启动名为openstack_cluster的集群，在controlle1上操作即可 ``` pcs cluster setup --force --name openstack-cluster controller1 controller2 controller3 ```  8）设置集群开启启动并查看状态，在controlle1上操作即可 ``` pcs cluster enable --all pcs cluster start --all pcs cluster status ```  9）查看并设置集群属性，在controlle1上操作即可 ``` ps aux |grep pacemaker ``` 10）验证corosync的安装及当前corosync的状态 ``` corosync-cfgtool -s corosync-cmapctl | grep members pcs status corosync ```  11）验证配置是否正确 ``` controller1# crm_verify -L -V controller1# pcs property set stonith-enabled=false controller1# pcs property set no-quorum-policy=ignore ``` 12）通过crm设置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" ```