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MMM是 mysql-master-master的缩写,MMM在多台mysql server之间以主-主的形式复制数据,达到并发访问,提高性能的目的。
MMM项目来自Google:http://code.google.com/p/mysql-master-master/
我的安装过程参考了文档http://blog.kovyrin.net/2007/04/ ... -example-using-mmm/
以下是我搭建的过程。
我使用三台RHEL5U1 server,其中一台是Monitoring Server,另两台Mysql server用来读写数据。
192.168.20.5做为Monitoring Server,
192.168.20.9做为db1,
192.168.20.10做为db2。
三台服务器先安装mysql,我安装的是mysql 5.1.22的社区版本。
先安装3个perl的包:
Algorithm-Diff-1.1902.tar.gz
Proc-Daemon-0.03.tar.gz
DBD-mysql-4.006.tar.gz(依赖于mysql-devel包)
perl包的安装过程都是:
perl Makefile.PL
make
make test
make install
DBD-mysql包的安装(本地mysql server必须处于运行状态):
perl Makefile.PL --testuser=root --testpassword=abcdefg (后面的参数是本地mysql server登录的用户名和密码)
make
make test
make install
安装DBD-mysql的时候提示找不到mysql_config,需要安装mysql-devel包。
安装mmm:
./install.pl
先配置Master-Master replication:
在db1的/etc/my.cnf增加:
server-id = 1
log-bin = mysql-bin
在db2的/etc/my.cnf增加:
server-id = 2
log-bin = mysql-bin
为了保证replication能正常启动,我在启动mysql服务以前以前把/var/lib/mysql目录下与二进制日志相关的文件全部删除,包括log-bin、 relaybin、mysql-bin.index、mysql_ndb-1-relay-bin.index、relay-log.info等文件,又删除test库里的表。
启动mysql以后在db1上的mysql里执行命令:
- grant replication slave on *.* to 'replication'@'%' identified by 'slave';
- change master to master_host='192.168.20.10', master_port=3306, master_user='replication', master_password='slave';
- slave start;
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在db2上的mysql里执行命令:
- grant replication slave on *.* to 'replication'@'%' identified by 'slave';
- change master to master_host='192.168.20.9', master_port=3306, master_user='replication', master_password='slave';
- slave start;
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show slave status\G;的结果:
db1:
- *************************** 1. row ***************************
- Slave_IO_State: Waiting for master to send event
- Master_Host: 192.168.20.10
- Master_User: replication
- Master_Port: 3306
- Connect_Retry: 60
- Master_Log_File: mysql-bin.000001
- Read_Master_Log_Pos: 106
- Relay_Log_File: mysql_ndb-1-relay-bin.000002
- Relay_Log_Pos: 251
- Relay_Master_Log_File: mysql-bin.000001
- Slave_IO_Running: Yes
- Slave_SQL_Running: Yes
- Replicate_Do_DB:
- Replicate_Ignore_DB:
- Replicate_Do_Table:
- Replicate_Ignore_Table:
- Replicate_Wild_Do_Table:
- Replicate_Wild_Ignore_Table:
- Last_Errno: 0
- Last_Error:
- Skip_Counter: 0
- Exec_Master_Log_Pos: 106
- Relay_Log_Space: 412
- Until_Condition: None
- Until_Log_File:
- Until_Log_Pos: 0
- Master_SSL_Allowed: No
- Master_SSL_CA_File:
- Master_SSL_CA_Path:
- Master_SSL_Cert:
- Master_SSL_Cipher:
- Master_SSL_Key:
- Seconds_Behind_Master: 0
- Master_SSL_Verify_Server_Cert: No
- Last_IO_Errno: 0
- Last_IO_Error:
- Last_SQL_Errno: 0
- Last_SQL_Error:
- 1 row in set (0.00 sec)
- ERROR:
- No query specified
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db2上的结果:
- *************************** 1. row ***************************
- Slave_IO_State: Waiting for master to send event
- Master_Host: 192.168.20.9
- Master_User: replication
- Master_Port: 3306
- Connect_Retry: 60
- Master_Log_File: mysql-bin.000001
- Read_Master_Log_Pos: 106
- Relay_Log_File: mysql_ndb-2-relay-bin.000002
- Relay_Log_Pos: 251
- Relay_Master_Log_File: mysql-bin.000001
- Slave_IO_Running: Yes
- Slave_SQL_Running: Yes
- Replicate_Do_DB:
- Replicate_Ignore_DB:
- Replicate_Do_Table:
- Replicate_Ignore_Table:
- Replicate_Wild_Do_Table:
- Replicate_Wild_Ignore_Table:
- Last_Errno: 0
- Last_Error:
- Skip_Counter: 0
- Exec_Master_Log_Pos: 106
- Relay_Log_Space: 412
- Until_Condition: None
- Until_Log_File:
- Until_Log_Pos: 0
- Master_SSL_Allowed: No
- Master_SSL_CA_File:
- Master_SSL_CA_Path:
- Master_SSL_Cert:
- Master_SSL_Cipher:
- Master_SSL_Key:
- Seconds_Behind_Master: 0
- Master_SSL_Verify_Server_Cert: No
- Last_IO_Errno: 0
- Last_IO_Error:
- Last_SQL_Errno: 0
- Last_SQL_Error:
- 1 row in set (0.00 sec)
- ERROR:
- No query specified
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MMM所有配置文件都放在/usr/local/mmm/etc目录下。
管理节点上的配置文件mmm_mon.conf,在这个配置文件里指定了reader和writer角色的虚拟IP:
db1上的配置文件mmm_agent.conf:
- #
- # Master-Master Manager config (agent)
- #
- # Debug mode
- debug no
- # Paths
- pid_path /usr/local/mmm/var/mmmd_agent.pid
- bin_path /usr/local/mmm/bin
- # Logging setup
- log mydebug
- file /usr/local/mmm/var/mmm-debug.log
- level debug
- log mytraps
- file /usr/local/mmm/var/mmm-traps.log
- level trap
- # MMMD command socket tcp-port and ip
- bind_port 9989
- # Cluster interface
- cluster_interface eth1
- # Define current server id
- this db1
- mode slave
- # For masters
- peer db2
- # Cluster hosts addresses and access params
- host db1
- ip 192.168.20.9
- port 3306
- user rep_agent
- password RepAgent
- host db2
- ip 192.168.20.10
- port 3306
- user rep_agent
- password RepAgent
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db2上的配置文件mmm_agent.conf:
- #
- # Master-Master Manager config (agent)
- #
- # Debug mode
- debug no
- # Paths
- pid_path /usr/local/mmm/var/mmmd_agent.pid
- bin_path /usr/local/mmm/bin
- # Logging setup
- log mydebug
- file /usr/local/mmm/var/mmm-debug.log
- level debug
- log mytraps
- file /usr/local/mmm/var/mmm-traps.log
- level trap
- # MMMD command socket tcp-port and ip
- bind_port 9989
- # Cluster interface
- cluster_interface eth1
- # Define current server id
- this db2
- mode slave
- # For masters
- peer db1
- # Cluster hosts addresses and access params
- host db1
- ip 192.168.20.9
- port 3306
- user rep_agent
- password RepAgent
- host db2
- ip 192.168.20.10
- port 3306
- user rep_agent
- password RepAgent
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在db1和db2上建立新用户,用于管理节点访问db节点:
GRANT ALL PRIVILEGES on *.* to 'rep_monitor'@'192.168.20.5' identified by 'RepMonitor';
在db1和db2节点上启动agent:
mmmd_agent
在管理节点上启动管理进程:
mmmd_mon
- Reading config file: 'mmm_mon.conf'
- $VAR1 = {
- 'db2' => {
- 'roles' => [],
- 'version' => '0',
- 'state' => 'AWAITING_RECOVERY'
- },
- 'db1' => {
- 'roles' => [
- 'reader(192.168.20.27;)',
- 'reader(192.168.20.28;)',
- 'writer(192.168.20.29;)'
- ],
- 'version' => '0',
- 'state' => 'ONLINE'
- }
- };
- Role: 'reader(192.168.20.27;)'
- Adding role: 'reader' with ip '192.168.20.27'
- Role: 'reader(192.168.20.28;)'
- Adding role: 'reader' with ip '192.168.20.28'
- Role: 'writer(192.168.20.29;)'
- Adding role: 'writer' with ip '192.168.20.29'
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在管理节点上启动db节点
mmm_control set_online db1
- Config file: mmm_mon.conf
- Daemon is running!
- Command sent to monitoring host. Result: OK: State of 'db1' changed to ONLINE. Now you can wait some time and check its new roles!
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mmm_control set_online db2
- Config file: mmm_mon.conf
- Daemon is running!
- Command sent to monitoring host. Result: OK: State of 'db2' changed to ONLINE. Now you can wait some time and check its new roles!
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管理节点上相关进程的状态:
- root 8653 0.6 14.9 256856 39192 ? Sl 15:51 0:01 perl /usr/local/sbin/mmmd_mon
- root 8656 0.1 3.1 99868 8160 ? S 15:51 0:00 \_ perl /usr/local/mmm/bin/check/checker rep_backlog
- root 8658 0.1 3.1 99856 8144 ? S 15:51 0:00 \_ perl /usr/local/mmm/bin/check/checker mysql
- root 8661 0.1 1.8 87004 4932 ? S 15:51 0:00 \_ perl /usr/local/mmm/bin/check/checker ping
- root 8926 0.0 0.1 1612 508 ? S 15:55 0:00 | \_ /usr/local/mmm/bin/sys/fping -q -u -t 500 -C 1 192.168.20.10
- root 8662 0.1 3.1 99868 8168 ? S 15:51 0:00 \_ perl /usr/local/mmm/bin/check/checker rep_threads
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db1上的相关进程:
- root 8769 0.3 3.0 100520 7988 ? S 15:38 0:04 perl /usr/local/sbin/mmmd_agent
- root 11824 15.0 2.5 94764 6588 ? S 15:56 0:00 \_ perl /usr/local/mmm/bin/agent/check_role writer(192.168.20.29;)
- root 11825 17.0 2.9 101824 7776 ? S 15:56 0:00 \_ perl /usr/local/mmm/bin/mysql_allow_write
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db2上的相关进程:
- root 8731 0.0 3.0 100524 7980 ? S 15:38 0:01 perl /usr/local/sbin/mmmd_agent
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在管理节点上查看节点状态:
mmm_control show
- Config file: mmm_mon.conf
- Daemon is running!
- Servers status:
- db1(192.168.20.9): master/ONLINE. Roles: writer(192.168.20.29;)
- db2(192.168.20.10): master/ONLINE. Roles: reader(192.168.20.27;), reader(192.168.20.28;)
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到这里集群搭好了,db1负责读数据,db2负责读和写数据,读写性能应该比单台mysql server高,对于类似read 90% + write 10%这样的应用来说,增加读节点以后,整体性能会有很大提高。
接下来用sysbench和super-smack测它的性能。
[ 本帖最后由 sailer_sh 于 2008-1-21 10:23 编辑 ] |
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