Part3:master故障
[root@HE3 ~]# maxadmin -pmariadb list servers
Servers.
-------------------+-----------------+-------+-------------+--------------------
Server | Address | Port | Connections | Status
-------------------+-----------------+-------+-------------+--------------------
server1 | 192.168.1.248 | 3306 | 0 | Slave, Running
server2 | 192.168.1.249 | 3306 | 0 | Slave, Running
server3 | 192.168.1.100 | 3306 | 0 | Master, Running
-------------------+-----------------+-------+-------------+--------------------
[root@HE3 ~]# ps -ef|grep mysql
root 27709 1 0 Nov03 ? 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql --pid-file=/data/mysql/HE3.pid
mysql 28415 27709 0 Nov03 ? 00:00:19 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql/error.log --open-files-limit=8192 --pid-file=/data/mysql/HE3.pid --socket=/tmp/mysql.sock --port=3306
root 30794 28966 0 02:34 pts/1 00:00:00 grep mysql
[root@HE3 ~]# kill -9 28415 27709
[root@HE3 ~]# maxadmin -pmariadb list servers
Servers.
-------------------+-----------------+-------+-------------+--------------------
Server | Address | Port | Connections | Status
-------------------+-----------------+-------+-------------+--------------------
server1 | 192.168.1.248 | 3306 | 0 | Slave, Running
server2 | 192.168.1.249 | 3306 | 0 | Slave, Running
server3 | 192.168.1.100 | 3306 | 0 | Master, Running
-------------------+-----------------+-------+-------------+--------------------
[root@HE3 ~]# maxadmin -pmariadb list servers
Servers.
-------------------+-----------------+-------+-------------+--------------------
Server | Address | Port | Connections | Status
-------------------+-----------------+-------+-------------+--------------------
server1 | 192.168.1.248 | 3306 | 0 | Master, Running
server2 | 192.168.1.249 | 3306 | 0 | Slave, Running
server3 | 192.168.1.100 | 3306 | 0 | Running
-------------------+-----------------+-------+-------------+--------------------
可以看出，kill master的mysql进程后，MHA将slave1拉成新的master,Maxsale也识别了这一状态。