CentOS 搭建 Mysql MMM 高可用架构

环境

CentOS

Mysql 5.1

前提

安装了EPEL，详细安装步骤请參照

http://blog.csdn.net/robinsonmhj/article/details/36184863

机器列表

安装步骤

1. 在db1 和 db2 上安装mysql

yum install mysql-server

2. 改动配置文件

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上运行。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的值通过例如以下命令察看
在db2上运行例如以下mysql命令 show master status

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的值通过例如以下命令察看
在db1上运行例如以下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. 改动配置文件

在db1，db2和monitor上改动

/etc/mysql-mmm/mmm_common.conf。改动内容例如以下

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>

/etc/mysql-mmm/mmm_agent.conf

db1上的内容例如以下

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>

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>

改动配置monitor文件

/etc/mysql-mmm/mmm_mon.conf，内容例如以下

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  

    # 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

參考

http://blog.csdn.net/mydeman/article/details/6845567

http://hi.baidu.com/viewehsoitfmyzr/item/5024bec2ef02ccd196445280