mysql集群之MMM简单搭建
MMM配置环境
MMM-monitor 192.168.78.128 （M1/M128）
master1:192.168.78.
1设置hosts解析
三台都需要能彼此解析
追加hosts文件 /etc/hosts
192.168.78.128 M1
192.168.78.129 M2
192.168.78.130 slave1
2配置主从服务器账号
grant replication slave, replication client on *.* to 'repl'@'%' identified by 'repl';
grant process,super, replication client on *.* to 'mmm_agent'@'%' identified by '123456';
grant replication client on *.* to 'mmm_monitor'@'%' identified by '123456';
3安装MMM
三台上分别配置perl源
rpm -Uvh http://mirrors.ustc.edu.cn/fedora/epel/6/x86_64/epel-release-6-8.noarch.rpm
安装MMM（测试用的，所以是rpm包，不要用在生产环境）
yum -y install mysql-mmmm*
查看安装
rpm -qa|grep mysql-mmm
mmm,anget,monitor,tools
4配置MMM
cd /etc/mysql-mmm
修改mmm_common.conf同步到三台机器
vim mmm_common.conf
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 123456
</host>
<host M1>
ip 192.168.78.128
mode master
peer M1
</host>
<host M2>
ip 192.168.78.129
mode master
peer M2
</host>
<host slave1>
ip 192.168.78.130
mode slave
peer slave1
</host>
<role writer>
hosts M1,M2
ips 192.168.78.140
mode exclusive
</role>
<role reader>
hosts M1,M2,slave1
ips 192.168.78.138, 192.168.78.139
mode balanced
</role>
for i in M2 slave1;do scp /etc/mysql-mmm/mmm_common.conf $i:/etc/mysql-mmm/;done
分别修改mmm_agent.conf
vim 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.
this M1
配置mysql_mon.conf(三台上分别配置，但只能启动一台监控)
[root@M128 mysql-mmm]# vim 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 192.168.78.128, 192.168.78.129, 192.168.78.130
auto_set_online 10
# 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 123456
</host>
debug 0
5启动MMM
三台均启动agent端
/etc/init.d/mysql-mmm-agent start
监控端启动
/etc/init.d/mysql-mmm-monitor start
正常启动后的进程如下：
agent端
[root@M130 mysql-mmm]# ps -ef|grep mmm
root 15686 1 0 02:44 ? 00:00:00 mmm_agentd
root 15688 15686 0 02:44 ? 00:00:44 mmm_agentd
root 54389 12494 0 18:47 pts/0 00:00:00 grep mmm
monitor端
[root@M129 ~]# ps -ef|grep mmm
root 27681 1 0 18:51 ? 00:00:00 mmm_mond
root 27682 27681 9 18:51 ? 00:00:01 mmm_mond
root 27712 27682 1 18:51 ? 00:00:00 perl /usr/libexec/mysql-mmm/monitor/checker ping_ip
root 27715 27682 2 18:51 ? 00:00:00 perl /usr/libexec/mysql-mmm/monitor/checker mysql
root 27717 27682 2 18:51 ? 00:00:00 perl /usr/libexec/mysql-mmm/monitor/checker ping
root 27719 27682 3 18:51 ? 00:00:00 perl /usr/libexec/mysql-mmm/monitor/checker rep_backlog
root 27721 27682 2 18:51 ? 00:00:00 perl /usr/libexec/mysql-mmm/monitor/checker rep_threads
root 27739 35397 0 18:51 pts/1 00:00:00 grep mmm
root 35239 1 0 02:44 ? 00:00:00 mmm_agentd
root 35241 35239 0 02:44 ? 00:00:50 mmm_agentd
[root@M129 ~]#
6查看状态
[root@M128 mysql-mmm]# mmm_control show
M1(192.168.78.128) master/ONLINE. Roles: reader(192.168.78.138)
M2(192.168.78.129) master/ONLINE. Roles: writer(192.168.78.140)
slave1(192.168.78.130) slave/ONLINE. Roles: reader(192.168.78.139)
[root@M128 mysql-mmm]# mmm_control checks all
M1 ping [last change: 2015/10/20 18:51:21] OK
M1 mysql [last change: 2015/10/20 18:51:21] OK
M1 rep_threads [last change: 2015/10/20 18:51:21] OK
M1 rep_backlog [last change: 2015/10/20 18:51:21] OK: Backlog is null
slave1 ping [last change: 2015/10/20 18:51:21] OK
slave1 mysql [last change: 2015/10/20 18:51:21] OK
slave1 rep_threads [last change: 2015/10/20 18:51:21] OK
slave1 rep_backlog [last change: 2015/10/20 18:51:21] OK: Backlog is null
M2 ping [last change: 2015/10/20 18:51:21] OK
M2 mysql [last change: 2015/10/20 18:51:21] OK
M2 rep_threads [last change: 2015/10/20 18:51:21] OK
M2 rep_backlog [last change: 2015/10/20 18:51:21] OK: Backlog is null
7删除RPM包安装的MMM
yum remove mysql-mmm*
8总结：
MMM集群的坑比较多，只做测试，不用在生产环境