CentOS搭建MysqlMMM高可用架构 - mysql数据库栏目 - 自

环境

CentOS

前提

安装了EPEL，具体安装步骤请参照

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

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

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