前期准备，各个节点时间同步。
各个节点可以基于服务器名称互相访问
yum安装corosync和pacemaker
编辑配置corosync配置文件:
totem { version: 2 crypto_cipher: none crypto_hash: none interface { ringnumber: 0 #定义ringnumber从0开始，一个ringnumber等于一条心跳链路 bindnetaddr: 192.168.1.0 #使用的地址段 mcastaddr: 239.255.61.1 #组播地址 mcastport: 5405 #主播UDP端口， ttl: 1#ttl存活时间为1 } } logging { fileline: off to_stderr: no #不进行标准输出 to_logfile: yes #记录log文件 logfile: /var/log/cluster/corosync.log #日志文件位置 to_syslog: no #不开启syslog记录 debug: off #不开启调试模式 timestamp: on #记录时间戳 logger_subsys { subsys: QUORUM debug: off } } quorum { provider: corosync_votequorum #开启投票子系统并设置具体方式，默认为关闭 } nodelist { node { ring0_addr:192.168.1.61 nodeid:1 } node { ring0_addr:192.168.1.62 nodeid:2 } node { ring0_addr:192.168.1.63 nodeid:3 } } service { #定义一个服务来启动pacemaker ver: 0 #定义版本 name: pacemaker #这个表示启动corosync时会自启动 }
使用corosync-keygen生成/etc/corosync/authkey文件，这里可以使用-l选项，
corosync-keygen -l -k /etc/corosync/authkey
将/etc/corosync/目录下的authkey corosync.conf同步到其他节点上。
各个节点启动corosync服务。
执行crm_mon
Stack: corosync Current DC: node63.colinshi.top (version 1.1.18-11.el7_5.2-2b07d5c5a9) - partition with quorum Last updated: Wed Jun 27 14:38:14 2018 Last change: Wed Jun 27 13:40:48 2018 by root via crm_attribute on node61.colinshi.top 3 nodes configured 0 resources configured Online: [ node61.colinshi.top node62.colinshi.top node63.colinshi.top ] No active resources
可以看到3个节点均上线online状态。
接下来就可以定义资源
这里是使用了crmsh这个软件。用于配置相关资源等。
具体安装参见：https://www.cnblogs.com/colinshi/p/9019804.html
我这边准备配置2组资源一个是，每组资源有一个IP地址和一个服务组成
第一组为IP+nginx
定义2个资源：
crm configure primitive nginx_ip ocf:heartbeat:IPaddr ip='192.168.1.69'
crm configure primitive nginx_server systemd:nginx
2个资源合并到一个组内
crm configure group nginx_group nginx_server systemd:nginx
Stack: corosync Current DC: node63.colinshi.top (version 1.1.18-11.el7_5.2-2b07d5c5a9) - partition with quorum Last updated: Thu Jun 28 15:44:19 2018 Last change: Thu Jun 28 15:41:53 2018 by root via cibadmin on node61.colinshi.top 3 nodes configured 2 resources configured Online: [ node61.colinshi.top node62.colinshi.top node63.colinshi.top ] Full list of resources: Resource Group: nginx_group nginx_ip (ocf::heartbeat:IPaddr): Started node61.colinshi.top nginx_server (systemd:nginx): Started node61.colinshi.top
第二组为IP+mysql+文件挂载
定义3个资源
crm configure primitive mysql_ip ocf:heartbeat:IPaddr ip='192.168.1.68'
crm configure primitive mysql_server systemd:mysqld
crm configure primitive mysql_filesystem ocf:heartbeat:Filesystem device='192.168.1.2:/volume1/mydata' directory='/mydata' fstype='nfs'
定义colocation排列约束确保3个资源在一起
crm configure colocation mysql_file_with_server inf: mysql_filesystem mysql_server
crm configure colocation mysql_ip_with_server inf: mysql_ip mysql_server
定义order顺序约束
crm configure order mysql_file_order_server Serialize: mysql_ip mysql_filesystem mysql_server
搞定：
Stack: corosync Current DC: node63.colinshi.top (version 1.1.18-11.el7_5.2-2b07d5c5a9) - partition with quorum Last updated: Fri Jun 29 16:11:54 2018 Last change: Fri Jun 29 16:11:34 2018 by root via crm_attribute on node61.colinshi.top 3 nodes configured 5 resources configured Online: [ node61.colinshi.top node62.colinshi.top node63.colinshi.top ] Full list of resources: Resource Group: nginx_group nginx_ip (ocf::heartbeat:IPaddr): Started node62.colinshi.top nginx_server (systemd:nginx): Started node62.colinshi.top mysql_filesystem (ocf::heartbeat:Filesystem): Started node61.colinshi.top mysql_ip (ocf::heartbeat:IPaddr): Started node61.colinshi.top mysql_server (systemd:mysqld): Started node61.colinshi.top