CentOS 搭建 Mysql MMM 高可用架構

環境

CentOS

Mysql 5.1

前提

安裝了EPEL，具體安裝步驟請參照

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

機器列表

機器IP	機器名
192.168.0.135	db1
192.168.0.136	monitor
192.168.0.137	db2

虛擬IP	作用
192.168.0.138	writter
192.168.0.139	reader
192.168.0.140	reader

安裝步驟

1. 在db1 和 db2 上安裝mysql

yum install mysql-server

2. 修改設定檔

db1 的設定檔

[mysqld]datadir = /data/mysqlsocket=/data/mysql/mysql.sockuser=mysql<span style="font-size:18px;"><strong>server-id=1</strong></span>table_cache = 512sort_buffer_size = 2Mread_buffer_size = 2Mread_rnd_buffer_size = 8Mmyisam_sort_buffer_size = 64Mthread_cache_size = 8query_cache_size = 64Mthread_concurrency = 8log-bin=mysql-binbinlog_format = mixedmax_connections=2048character_set_server=utf8wait_timeout=1800interactive_timeout=1800skip-show-databaseskip-name-resolvetmp_table_size = 512Mmax_heap_table_size = 512Mbinlog-ignore-db = mysqlreplicate-ignore-db = mysqlbinlog-ignore-db = information_schemareplicate-ignore-db = information_schemabinlog-ignore-db = performance_schemareplicate-ignore-db = performance_schemabinlog-ignore-db = testreplicate-ignore-db = testinnodb_data_home_dir=/data/mysql/innodbinnodb_data_file_path=ibdata1:2000M;ibdata2:10M:autoextendinnodb_log_group_home_dir=/data/mysql/innodb/loginnodb_file_per_table=1innodb_buffer_pool_size = 1000Minnodb_additional_mem_pool_size = 20Minnodb_log_file_size = 100Minnodb_log_buffer_size = 8Minnodb_flush_log_at_trx_commit = 2innodb_lock_wait_timeout = 50default-storage-engine = MyISAM#default-storage-engine = INNODB[mysqld_safe]log-error=/var/log/mysqld.logpid-file=/var/run/mysqld/mysqld.pid[mysqldump]quickmax_allowed_packet = 16Msocket=/data/mysql/mysql.sock[mysql]no-auto-rehashsocket=/data/mysql/mysql.sock

db2 的設定檔

[mysqld]datadir = /data/mysqlsocket=/data/mysql/mysql.sockuser=mysql<span style="font-size:18px;"><strong>server-id=2</strong></span>table_cache = 512sort_buffer_size = 2Mread_buffer_size = 2Mread_rnd_buffer_size = 8Mmyisam_sort_buffer_size = 64Mthread_cache_size = 8query_cache_size = 64Mthread_concurrency = 8log-bin=mysql-binbinlog_format = mixedmax_connections=2048character_set_server=utf8wait_timeout=1800interactive_timeout=1800skip-show-databaseskip-name-resolvetmp_table_size = 512Mmax_heap_table_size = 512Mbinlog-ignore-db = mysqlreplicate-ignore-db = mysqlbinlog-ignore-db = information_schemareplicate-ignore-db = information_schemabinlog-ignore-db = performance_schemareplicate-ignore-db = performance_schemabinlog-ignore-db = testreplicate-ignore-db = testinnodb_data_home_dir=/data/mysql/innodbinnodb_data_file_path=ibdata1:2000M;ibdata2:10M:autoextendinnodb_log_group_home_dir=/data/mysql/innodb/loginnodb_file_per_table=1innodb_buffer_pool_size = 1000Minnodb_additional_mem_pool_size = 20Minnodb_log_file_size = 100Minnodb_log_buffer_size = 8Minnodb_flush_log_at_trx_commit = 2innodb_lock_wait_timeout = 50default-storage-engine = MyISAM#default-storage-engine = INNODB[mysqld_safe]log-error=/var/log/mysqld.logpid-file=/var/run/mysqld/mysqld.pid[mysqldump]quickmax_allowed_packet = 16Msocket=/data/mysql/mysql.sock[mysql]no-auto-rehashsocket=/data/mysql/mysql.sock

3. 在db1和db2 上分別建立複製，監控使用者

    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互相設定成master和slave

4.1 在db1上執行，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的值通過如下命令察看在db2上執行如下mysql命令 show master status

 

4.2 在db2上執行，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的值通過如下命令察看在db1上執行如下mysql命令 show master status

 

5. 在db1和db2上安裝mysql-mmm-agent

yum install mysql-mmm-agent*

6. 在monitor上安裝mysql-mmm-monitor

yum install mysql-mmm-monitor*

7. 修改設定檔

在db1，db2和monitor上修改

/etc/mysql-mmm/mmm_common.conf，修改內容如下

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>

修改設定檔

/etc/mysql-mmm/mmm_agent.conf

db1上的內容如下

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上的內容如下

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檔案

/etc/mysql-mmm/mmm_mon.conf，內容如下

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上啟動agent

    # cd /etc/init.d/      # chkconfig mysql-mmm-agent on      # service mysql-mmm-agent start  

9. 在monitor上啟動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 把一台機器上線

mmm_control set_online db1

10.3 實驗

把db1上的mysql停掉 service mysqld stop

察看狀態mmm_control -show status，db1上的寫ip應該飄到db2上

參考

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

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