MySQL HA by using Mysql-mmm

youdial

MySQL-mmm-two nodes(master)架构

In two node master-master setup, MMM uses five IPs: single permanent IP for each node
that is never changed, 2 reader IPs (read-only) and 1 writer IP (updates). Last three IPs
are migrating between the nodes depending on node availability.
Normally (no replication failures, no replication delay etc) active master has 2 IPs (reader
and writer), standby master - 1 IP (reader). In case of a failure, both - writer and reader
roles migrate to the working node.


测试环境部署
主机              ip              说明
monitor       192.168.1.109     mmm monitor服务器
master         192.168.1.106     数据库服务器(master)
slave1          192.168.1.107     数据库服务器(同样也为master)

vip部署
ip                         role                说明
192.168.1.220      writer           应用连接此ip执行写操作
192.168.1.221      reader          应用连接此ip执行读操作
192.168.1.222      reader          应用连接此ip执行读操作

具体安装配置过程：
1.安装MySQL-mmm与master-master复制（略）

2.数据库节点创建mmm_monitor与mmm_agent用户

• GRANT REPLICATION CLIENT   ON *.* TO 'mmm_monitor'@'192.168.1.%'
• IDENTIFIED BY 'RepMonitor';
• GRANT SUPER, REPLICATION CLIENT, PROCESS ON *.* TO 'mmm_agent'@'192.168.1.%'
• IDENTIFIED BY 'RepAgent';
  

3.所有节点（包括monitor节点）配置/etc/mysql-mmm/mmm_common.conf
所有节点均相同

• active_master_role      writer
• <host default>
•     cluster_interface       eth0
•     pid_path                /var/run/mysql-mmm/mmm_agentd.pid
•     bin_path                /usr/libexec/mysql-mmm/
•     replication_user        repl
•     replication_password    repl
•     agent_user              mmm_agent
•     agent_password          RepAgent
• </host>
• <host master>
•     ip      192.168.1.106
•     mode    master
•     peer    slave1
• </host>
• <host slave1>
•     ip      192.168.1.107
•     mode    master
•     peer    master
• </host>
• <role writer>
•     hosts   master, slave1
•     ips     192.168.1.220
•     mode    exclusive
• </role>
• <role reader>
•     hosts   master, slave1
•     ips     192.168.1.221, 192.168.1.222
•     mode    balanced
• </role>
  

4.数据库节点配置/etc/mysql-mmm/mmm_agent.conf

• include mmm_common.conf
• # The 'this' variable refers to this server.  Proper operation requires
• # that 'this' server (db1 by default), as well as all other servers, have the
• # proper IP addresses set in mmm_common.conf.
• # 修改为主机名
• this master
  

5.monitor节点配置/etc/mysql-mmm/mmm_mon.conf

• include mmm_common.conf
• <monitor>
•     ip                  127.0.0.1
•     pid_path            /var/run/mysql-mmm/mmm_mond.pid
•     bin_path            /usr/libexec/mysql-mmm
•     status_path         /var/lib/mysql-mmm/mmm_mond.status
•     ping_ips            192.168.1.1, 192.168.1.106, 192.168.1.107
•     auto_set_online     60
•     # The kill_host_bin does not exist by default, though the monitor will
•     # throw a warning about it missing.  See the section 5.10 "Kill Host
•     # Functionality" in the PDF documentation.
•     #
•     # kill_host_bin     /usr/libexec/mysql-mmm/monitor/kill_host
•     #
• </monitor>
• <host default>
•     monitor_user        mmm_monitor
•     monitor_password    RepMonitor
• </host>
• debug 0
  

6.MySQL-mmm测试

• [iyunv@monitor mysql-mmm]# mmm_control show
•   master(192.168.1.106) master/ONLINE. Roles: reader(192.168.1.222), writer(192.168.1.220)
•   slave1(192.168.1.107) master/ONLINE. Roles: reader(192.168.1.221)
• --关闭master主机上的mysql服务，角色成功切换
• [iyunv@monitor mysql-mmm]# mmm_control show
•   master(192.168.1.106) master/HARD_OFFLINE. Roles:
•   slave1(192.168.1.107) master/ONLINE. Roles: reader(192.168.1.221), reader(192.168.1.222), writer(192.168.1.220)
• --启动master主机上的mysql服务，角色成功切换
• [iyunv@monitor mysql-mmm]# mmm_control show
•   master(192.168.1.106) master/ONLINE. Roles: reader(192.168.1.221)
•   slave1(192.168.1.107) master/ONLINE. Roles: reader(192.168.1.222), writer(192.168.1.220)
  

7.常用命令

• [iyunv@monitor mysql-mmm]# mmm_control show
• [iyunv@monitor mysql-mmm]# mmm_control set_online slave1
• [iyunv@monitor mysql-mmm]# mmm_control set_offline slave1
  

竹子开花的时

穿别人的鞋，走自己的路，让他们找去吧。

smith88

沙发！沙发!

xiaui520

爱——不是想出来的，爱——是做出来的!!

reko_3

如果有一双眼睛陪我一同哭泣，就值得我为生命受苦。

luoson1

鸳鸳相抱何时了，鸯在一边看热闹。

xiaui520

我抢、我抢、我抢沙发~