<role reader>
hosts db2, db3, db4
ips 192.168.85.201, 192.168.85.202, 192.168.85.203
mode balanced
</role>
可以在db1上编辑该文件后，通过scp命令分别复制到monitor、db2、db3和db4上。
2. 编辑mmm_agent.conf。在数据库服务器上，还有一个mmm_agent.conf需要修改，其内容是：
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 db1
最后一行的db1，在不同的数据库服务器上要分别改为db2、db3和db4，否则代理就会无法启动。
3. 编辑mmm_mon.confg。在管理服务器上，修改mmm_mon.conf文件，修改后内容为：
include mmm_common.conf
<monitor>
ip 192.168.84.174
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 192.168.85.167, 192.168.85.169, 192.168.85.171, 192.168.85.168
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 monitor
</host>
debug 0
六、启动MMM
1. 在数据库服务器上启动代理程序
# cd /etc/init.d/
# chkconfig mysql-mmm-agent on
# service mysql-mmm-agent start
2. 在管理服务器上启动监控程序
# cd /etc/init.d/
# chkconfig mysql-mmm-monitor on
# service mysql-mmm-monitor start
