环境
CentOS
Mysql 5.1
前提
安装了EPEL，具体安装步骤请参照
http://blog.csdn.net/robinsonmhj/article/details/36184863
机器列表
| 机器IP | 机器名 |
| 192.168.0.135 | db1 |
| 192.168.0.136 | monitor |
| 192.168.0.137 | db2 |
| 虚拟IP | 作用 |
| 192.168.0.138 | writter |
| 192.168.0.139 | reader |
| 192.168.0.140 | reader |
安装步骤
1. 在db1 和 db2 上安装mysql
yum install mysql-server
2. 修改配置文件
db1 的配置文件
[mysqld] datadir = /data/mysql socket=/data/mysql/mysql.sock user=mysql <span style="font-size:18px;"><strong>server-id=1</strong></span> table_cache = 512 sort_buffer_size = 2M read_buffer_size = 2M read_rnd_buffer_size = 8M myisam_sort_buffer_size = 64M thread_cache_size = 8 query_cache_size = 64M thread_concurrency = 8 log-bin=mysql-bin binlog_format = mixed max_connections=2048 character_set_server=utf8 wait_timeout=1800 interactive_timeout=1800 skip-show-database skip-name-resolve tmp_table_size = 512M max_heap_table_size = 512M binlog-ignore-db = mysql replicate-ignore-db = mysql binlog-ignore-db = information_schema replicate-ignore-db = information_schema binlog-ignore-db = performance_schema replicate-ignore-db = performance_schema binlog-ignore-db = test replicate-ignore-db = test innodb_data_home_dir=/data/mysql/innodb innodb_data_file_path=ibdata1:2000M;ibdata2:10M:autoextend innodb_log_group_home_dir=/data/mysql/innodb/log innodb_file_per_table=1 innodb_buffer_pool_size = 1000M innodb_additional_mem_pool_size = 20M innodb_log_file_size = 100M innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 2 innodb_lock_wait_timeout = 50 default-storage-engine = MyISAM #default-storage-engine = INNODB [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid [mysqldump] quick max_allowed_packet = 16M socket=/data/mysql/mysql.sock [mysql] no-auto-rehash socket=/data/mysql/mysql.sock
db2 的配置文件
[mysqld] datadir = /data/mysql socket=/data/mysql/mysql.sock user=mysql <span style="font-size:18px;"><strong>server-id=2</strong></span> table_cache = 512 sort_buffer_size = 2M read_buffer_size = 2M read_rnd_buffer_size = 8M myisam_sort_buffer_size = 64M thread_cache_size = 8 query_cache_size = 64M thread_concurrency = 8 log-bin=mysql-bin binlog_format = mixed max_connections=2048 character_set_server=utf8 wait_timeout=1800 interactive_timeout=1800 skip-show-database skip-name-resolve tmp_table_size = 512M max_heap_table_size = 512M binlog-ignore-db = mysql replicate-ignore-db = mysql binlog-ignore-db = information_schema replicate-ignore-db = information_schema binlog-ignore-db = performance_schema replicate-ignore-db = performance_schema binlog-ignore-db = test replicate-ignore-db = test innodb_data_home_dir=/data/mysql/innodb innodb_data_file_path=ibdata1:2000M;ibdata2:10M:autoextend innodb_log_group_home_dir=/data/mysql/innodb/log innodb_file_per_table=1 innodb_buffer_pool_size = 1000M innodb_additional_mem_pool_size = 20M innodb_log_file_size = 100M innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 2 innodb_lock_wait_timeout = 50 default-storage-engine = MyISAM #default-storage-engine = INNODB [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid [mysqldump] quick max_allowed_packet = 16M socket=/data/mysql/mysql.sock [mysql] no-auto-rehash socket=/data/mysql/mysql.sock
3. 在db1和db2 上分别建立复制，监控用户
GRANT REPLICATION CLIENT ON *.* TO 'mmm_monitor'@'192.168.0.136' IDENTIFIED BY 'monitor';
GRANT SUPER, REPLICATION CLIENT, PROCESS ON *.* TO 'mmm_agent'@'192.168.0.%' IDENTIFIED BY 'agent';
GRANT REPLICATION SLAVE ON *.* TO 'replication'@'192.168.0.%' IDENTIFIED BY 'replication';
4. 把db1和db2互相设置成master和slave
4.1 在db1上执行，mysql命令
CHANGE MASTER TO master_host='192.168.0.137', master_port=3306, master_user='replication',master_password='replication', master_log_file='mysql-bin.000006', master_log_pos=106; 注意： <span></span><pre name="code" class="html">master_log_file和master_log_pos的值通过如下命令察看 在db2上执行如下mysql命令 show master status
4.2 在db2上执行，mysql命令
CHANGE MASTER TO master_host='192.168.0.135', master_port=3306, master_user='replication',master_password='replication', master_log_file='mysql-bin.000006', master_log_pos=106; 注意： <span></span><pre name="code" class="html">master_log_file和master_log_pos的值通过如下命令察看 在db1上执行如下mysql命令 show master status
5. 在db1和db2上安装mysql-mmm-agent
yum install mysql-mmm-agent*
6. 在monitor上安装mysql-mmm-monitor
yum install mysql-mmm-monitor*
7. 修改配置文件
在db1，db2和monitor上修改
/etc/mysql-mmm/mmm_common.conf，修改内容如下
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 replication
replication_password replication
agent_user mmm_agent
agent_password agent
</host>
<host db1>
ip 192.168.0.135
mode master
peer db2
</host>
<host db2>
ip 192.168.0.137
mode master
peer db1
</host>
<role writer>
hosts db1,db2
ips 192.168.0.138
mode exclusive
</role>
<role reader>
hosts db1,db2
ips 192.168.0.139,192.168.0.140
mode balanced
</role>
修改配置文件
/etc/mysql-mmm/mmm_agent.conf
db1上的内容如下
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. <span style="font-size:18px;"><strong>this db1</strong></span>db2上的内容如下
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. <span style="font-size:18px;"><strong>this db2</strong></span>
修改配置monitor文件
/etc/mysql-mmm/mmm_mon.conf，内容如下
include mmm_common.conf
<monitor>
ip <span style="font-size:18px;"><strong>192.168.0.136</strong></span>
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 <span style="font-size:18px;"><strong>192.168.0.135,192.168.0.137</strong></span>
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
8.在db1，db2上启动agent
# cd /etc/init.d/
# chkconfig mysql-mmm-agent on
# service mysql-mmm-agent start
9. 在monitor上启动monitor
# cd /etc/init.d/
# chkconfig mysql-mmm-monitor on
# service mysql-mmm-monitor start
10. 在monitor上察看
mmm_control -show status
10.2 把一台机器上线
mmm_control set_online db1
10.3 试验
把db1上的mysql停掉 service mysqld stop
察看状态mmm_control -show status，db1上的写ip应该飘到db2上
参考
http://blog.csdn.net/mydeman/article/details/6845567
http://hi.baidu.com/viewehsoitfmyzr/item/5024bec2ef02ccd196445280