CentOS
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/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 的配置文件
[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
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>
/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>
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
# 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
![[Web front-end] Permulaan pantas Node.js](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
