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1 install mysql 。

请参考http://www.zzvips.com/article/51606.html 。

2. Basic configuration of master 1 。

3. Create users 。

GRANT REPLICATION CLIENT ON *.* TO 'mmm_monitor'@'%' IDENTIFIED BY 'mmm_monitor',

GRANT SUPER, REPLICATION CLIENT, PROCESS ON *.* TO 'mmm_agent'@'%' IDENTIFIED BY 'mmm_agent',

GRANT REPLICATION SLAVE ON *.* TO 'repl'@'10.88.49.%' IDENTIFIED BY 'repl',

grant insert,create,delete,update,select on *.* to 'tim'@'%' identified by 'tim',

Note: Don not use a replication_password longer than 32 characters 。

4. Synchronisation of data between both databases 。

5. Setup replication 。

set m-s

change master to master_host='10.88.49.119',master_log_file='mysql56-bin.000026',master_log_pos=332, master_user='repl',master_password='repl',

6. Install mmm 。

6.1 download mmm.tar.gz 。

wget http://mysql-mmm.org/_media/:mmm2:mysql-mmm-2.2.1.tar.gz 。

6.2 mv :mmm2:mysql-mmm-2.2.1.tar.gz mysql-mmm-2.2.1.tar.gz 。

tar -xvf mysql-mmm-2.2.1.tar.gz 。

cd mysql-mmm-2.2.1 。

make 。

cmake 。

[] don not require make and make install, there have *.conf in /etc/mysql-mmm folder. 。

7. install lib package 。

yum install -y perl-* 。

yum install -y libart_lgpl.x86_64 。

yum install -y mysql-mmm.noarch fail 。

yum install -y rrdtool.x86_64 。

yum install -y rrdtool-perl.x86_64 。

7.1 []another way to install lib package in network 。

cpan -i Algorithm::Diff Class::Singleton DBI DBD::mysql Log::Dispatch Log::Log4perl Mail::Send Net::Ping Proc::Daemon Time::HiRes Params::Validate Net::ARP 。

8. Config MMM of DB host 。

vim /etc/mysql-mmm/mmm_common.conf 。

Don not forget to copy this file to all other hosts (including the monitoring host). 。

#Bugsfor$ 。

scp /etc/mysql-mmm/mmm_common.conf 10.88.49.119:/etc/mysql-mmm/ 。

scp /etc/mysql-mmm/mmm_common.conf 10.88.49.122:/etc/mysql-mmm/ 。

scp /etc/mysql-mmm/mmm_common.conf 10.88.49.123:/etc/mysql-mmm/ 。

On the database hosts we need to edit /etc/mysql-mmm/mmm_agent.conf. Change “db1” accordingly on the other hosts

chkconfig --add mysql-mmm-agent 。

9. Config Monitor 。

On the monitor host(10.88.49.123) we need to edit /etc/mysql-mmm/mmm_mon.conf

include mmm_common.conf 。

ip 127.0.0.1 。

pid_path /var/run/mmm_mond.pid 。

bin_path /usr/lib/mysql-mmm/ 。

status_path /var/lib/misc/mmm_mond.status 。

auto_set_online 5 。

ping_ips 10.88.49.254,10.88.49.130,10.88.49.131,10.88.49.132,10.88.49.133,10.88.49.134 。

  。

monitor_user mmm_monitor 。

monitor_password mmm_monitor 。

  。

debug 0 。

ping_ips are some ips that are pinged to determine whether the network connection of the monitor is ok. I used my switch of GATEWAY (10.88.49.254) and the four database server.follow this 。

[root@oracle mysql-mmm]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 。

DEVICE=eth0 。

IPADDR=10.88.49.118 。

NETWASK=255.255.254.0 。

GATEWAY=10.88.49.254 。

DNS1=10.106.185.143 。

DNS2=10.106.185.138 。

ONBOOT=yes 。

BOOTPROTO=none 。

TYPE=Ethernet 。

HWADDR=00:15:5D:01:6A:0C 。

10. Start in database hosts 。

chkconfig --add mysql-mmm-agent 。

[root@oracle ~]# mysql-mmm-agent start 。

-bash: mysql-mmm-agent: command not found 。

[root@oracle ~]# service mysql-mmm-agent start 。

Daemon bin: '/usr/sbin/mmm_agentd' 。

Daemon pid: '/var/run/mmm_agentd.pid' 。

Starting MMM Agent daemon... Can not locate Proc/Daemon.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at /usr/sbin/mmm_agentd line 7. 。

BEGIN failed--compilation aborted at /usr/sbin/mmm_agentd line 7. 。

[root@oracle ~]# cpan Proc::Daemon 。

[root@oracle ~]# cpan Log::Log4perl 。

[root@oracle ~]# /etc/init.d/mysql-mmm-agent start 。

Daemon bin: '/usr/sbin/mmm_agentd' 。

Daemon pid: '/var/run/mmm_agentd.pid' 。

Starting MMM Agent daemon... Ok 。

11. Start in monitor hosts 。

chkconfig --add mysql-mmm-monitor 。

[root@localhost mysql-mmm-2.2.1]# service mysql-mmm-monitor start 。

Daemon bin: '/usr/sbin/mmm_mond' 。

Daemon pid: '/var/run/mmm_mond.pid' 。

Starting MMM Monitor daemon: Can not locate Proc/Daemon.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at /usr/sbin/mmm_mond line 11. 。

BEGIN failed--compilation aborted at /usr/sbin/mmm_mond line 11. 。

failed 。

[root@oracle ~]# cpan Proc::Daemon 。

[root@oracle ~]# cpan Log::Log4perl 。

[root@localhost mysql-mmm-2.2.1]# service mysql-mmm-monitor start 。

Daemon bin: '/usr/sbin/mmm_mond' 。

Daemon pid: '/var/run/mmm_mond.pid' 。

Starting MMM Monitor daemon: Ok 。

12. Check fail 。

[root@oracle mysql-mmm]# ping 10.88.49.130 。

PING 10.88.49.130 (10.88.49.130) 56(84) bytes of data. 。

From 10.88.49.118 icmp_seq=2 Destination Host Unreachable 。

From 10.88.49.118 icmp_seq=3 Destination Host Unreachable 。

From 10.88.49.118 icmp_seq=4 Destination Host Unreachable 。

From 10.88.49.118 icmp_seq=6 Destination Host Unreachable 。

From 10.88.49.118 icmp_seq=7 Destination Host Unreachable 。

From 10.88.49.118 icmp_seq=8 Destination Host Unreachable 。

12.1 debug error info 。

在agent.conf 和 monitor.conf 分别加上 debug 1 。

然后看输出的日志 。

[root@localhost mysql-mmm]# mmm_control show 。

db1(10.88.49.118) master/AWAITING_RECOVERY. Roles

db2(10.88.49.119) master/AWAITING_RECOVERY. Roles

db3(10.88.49.122) slave/AWAITING_RECOVERY. Roles

[root@localhost mysql-mmm]# mmm_control set_online db1 。

OK: State of 'db1' changed to ONLINE. Now you can wait some time and check its new roles.

[root@localhost mysql-mmm]# mmm_control set_online db2 。

OK: State of 'db2' changed to ONLINE. Now you can wait some time and check its new roles.

[root@localhost mysql-mmm]# mmm_control set_online db3 。

OK: State of 'db3' changed to ONLINE. Now you can wait some time and check its new roles.

12.2 ping vip fail 。

2013/02/19 10:00:15 FATAL Couldn't configure IP '10.88.49.131' on interface 'eth1': undef 。

2013/02/19 10:00:15 DEBUG Executing /usr/lib/mysql-mmm//agent/mysql_allow_write 。

Can't locate Net/ARP.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at /usr/share/perl5/vendor_perl/MMM/Agent/Helpers/Network.pm line 11. 。

[1.1] 。

cpan Net/ARP.pm 。

yum install libuuid* Error 。

[2.1] if [1.1] fail , try this 。

[root@localhost mysql-mmm]# perl -MCPAN -e shell 。

cpan> install Net::ARP 。

[ok] 。

12.3 fail info

2013/02/19 10:25:23 INFO Added: reader(10.88.49.131), writer(10.88.49.130) 。

2013/02/19 10:25:23 DEBUG Executing /usr/lib/mysql-mmm//agent/configure_ip eth1 10.88.49.131 。

Device "eth1" does not exist. 。

2013/02/19 10:25:23 FATAL Couldn't configure IP '10.88.49.131' on interface 'eth1': ERROR: Could not check if ip 10.88.49.131 is configured on eth1

2013/02/19 10:25:23 DEBUG Executing /usr/lib/mysql-mmm//agent/sync_with_master 。

2013/02/19 10:25:23 DEBUG Executing /usr/lib/mysql-mmm//agent/mysql_allow_write 。

2013/02/19 10:25:23 DEBUG Executing /usr/lib/mysql-mmm//agent/configure_ip eth1 10.88.49.130 。

Device "eth1" does not exist. 。

2013/02/19 10:25:23 FATAL Couldn't configure IP '10.88.49.130' on interface 'eth1': ERROR: Could not check if ip 10.88.49.130 is configured on eth1

2013/02/19 10:25:23 DEBUG Fetching uptime from /proc/uptime 。

2013/02/19 10:25:23 DEBUG Uptime is 158489.10 。

2013/02/19 10:25:23 DEBUG Daemon: Answer = 'OK: Status applied successfully!' 。

[ok] cluster_interface should set the 。

12.4 When connect reader vip,Lost package, info

[root@localhost mysql-mmm]# ping 10.88.49.134 。

PING 10.88.49.134 (10.88.49.134) 56(84) bytes of data. 。

64 bytes from 10.88.49.134: icmp_seq=3 ttl=64 time=0.265 ms 。

64 bytes from 10.88.49.134: icmp_seq=6 ttl=64 time=0.699 ms 。

64 bytes from 10.88.49.134: icmp_seq=9 ttl=64 time=0.482 ms 。

64 bytes from 10.88.49.134: icmp_seq=12 ttl=64 time=0.405 ms 。

64 bytes from 10.88.49.134: icmp_seq=15 ttl=64 time=0.430 ms 。

14. Check all 。

[root@localhost ~]# mmm_control checks 。

db2 ping [last change: 2013/02/19 12:41:45] OK 。

db2 mysql [last change: 2013/02/19 12:41:45] OK 。

db2 rep_threads [last change: 2013/02/19 12:41:45] OK 。

db2 rep_backlog [last change: 2013/02/19 12:41:45] OK: Backlog is null 。

db3 ping [last change: 2013/02/19 12:41:45] OK 。

db3 mysql [last change: 2013/02/19 12:41:45] OK 。

db3 rep_threads [last change: 2013/02/19 12:41:45] OK 。

db3 rep_backlog [last change: 2013/02/19 12:41:45] OK: Backlog is null 。

db1 ping [last change: 2013/02/19 12:41:45] OK 。

db1 mysql [last change: 2013/02/19 12:41:45] OK 。

db1 rep_threads [last change: 2013/02/19 12:41:45] OK 。

db1 rep_backlog [last change: 2013/02/19 12:41:45] OK: Backlog is null 。

15 Check m<->m<->s change 。

15.1change writer from 10.88.49.118 to 10.88.49.119 Stop mysqld in db1 10.88.49.118 。

show slave status on 10.88.49.122, see Master_Host is '10.88.49.118' 。

[root@oracle ~]# service mysqld56 stop 。

Shutting down MySQL... SUCCESS.

15.1.1 show info in monitor host log 。

[root@localhost ~]# tail -f /var/log/mysql-mmm/mmm_mond.log 。

2013/02/20 10:34:42 INFO Removing all roles from host 'db1'

2013/02/20 10:34:42 INFO Removed role 'reader(10.88.49.134)' from host 'db1' 。

2013/02/20 10:34:42 INFO Removed role 'writer(10.88.49.130)' from host 'db1' 。

2013/02/20 10:34:42 INFO Orphaned role 'writer(10.88.49.130)' has been assigned to 'db2' 。

2013/02/20 10:34:42 INFO Orphaned role 'reader(10.88.49.134)' has been assigned to 'db3' 。

15.1.2 show info in slave host of 10.88.49.122, slave will change its master_host 。

[root@localhost ~]# mysql -P3307 -S /data56/mysql.sock -p123456 。

mysql> show slave status\G 。

*************************** 1. row *************************** 。

Slave_IO_State: Waiting for master to send event 。

Master_Host: 10.88.49.119 。

15.1.3 but there are some bad info in monitor host of 10.88.49.123, when you run 'mmm_control show', it may hold on . 。

2013/02/20 10:37:25 DEBUG Listener: Waiting for connection... 。

2013/02/20 10:37:28 DEBUG Listener: Waiting for connection... 。

15.1.4 [] why ？

i have solved this problem, it maybe occur when

(1): 'peer' paramter is wrong . 。

(2): 'ping_ips' and 'ips' are wrong 。

15.2 change writer from 10.88.49.119 to 10.88.49.118 。

15.2.1 start mysqld in 10.88.49.118, stop mysqld in 10.88.49.119, run 'mmm_control set_online db1' in monitor_host 。

15.2.2 show slave info in slave_host of 10.88.49.122 。

[root@localhost ~]# mysql -P3307 -S /data56/mysql.sock -p123456 。

mysql> show slave status\G 。

*************************** 1. row *************************** 。

Slave_IO_State: Waiting for master to send event 。

Master_Host: 10.88.49.118 。

15.3 stop mysqld on slave_host of 10.88.49.122 。

15.3.1 show info in monitor_host 。

[root@localhost mysql-mmm]# mmm_control show 。

db1(10.88.49.118) master/ONLINE. Roles: reader(10.88.49.134), reader(10.88.49.135), writer(10.88.49.130) 。

db2(10.88.49.119) master/ONLINE. Roles: reader(10.88.49.131), reader(10.88.49.132), reader(10.88.49.133) 。

db3(10.88.49.122) slave/HARD_OFFLINE. Roles

[] the ips change to mm. 。

15.3.2 start mysqld on slave_host of 10.88.49.122 。

15.3.3 show info in monitor_host 。

[root@localhost mysql-mmm]# mmm_control show 。

db1(10.88.49.118) master/ONLINE. Roles: reader(10.88.49.134), reader(10.88.49.135), writer(10.88.49.130) 。

db2(10.88.49.119) master/ONLINE. Roles: reader(10.88.49.131), reader(10.88.49.132), reader(10.88.49.133) 。

db3(10.88.49.122) slave/AWAITING_RECOVERY. Roles

[] need set online 。

[root@localhost mysql-mmm]# mmm_control set_online db3 。

OK: State of 'db3' changed to ONLINE. Now you can wait some time and check its new roles.

[root@localhost mysql-mmm]# mmm_control show 。

db1(10.88.49.118) master/ONLINE. Roles: reader(10.88.49.135), writer(10.88.49.130) 。

db2(10.88.49.119) master/ONLINE. Roles: reader(10.88.49.131), reader(10.88.49.133) 。

db3(10.88.49.122) slave/ONLINE. Roles: reader(10.88.49.132), reader(10.88.49.134) 。

15.4 stop master_host db2 of 10.88.49.119 。

15.4.1 show info in monitor_host 。

[root@localhost mysql-mmm]# mmm_control show 。

db1(10.88.49.118) master/ONLINE. Roles: reader(10.88.49.131), reader(10.88.49.135), writer(10.88.49.130) 。

db2(10.88.49.119) master/HARD_OFFLINE. Roles

db3(10.88.49.122) slave/ONLINE. Roles: reader(10.88.49.132), reader(10.88.49.133), reader(10.88.49.134) 。

see db2 is HARD_OFFLINE 。

15.4.2 start master_host db2 of 10.88.49.119 。

[root@localhost mysql-mmm]# mmm_control show 。

db1(10.88.49.118) master/ONLINE. Roles: reader(10.88.49.131), reader(10.88.49.135), writer(10.88.49.130) 。

db2(10.88.49.119) master/AWAITING_RECOVERY. Roles

db3(10.88.49.122) slave/ONLINE. Roles: reader(10.88.49.132), reader(10.88.49.133), reader(10.88.49.134) 。

see db2 is AWAITING_RECOVERY, so need set online 。

[root@localhost mysql-mmm]# mmm_control set_online db2 。

OK: State of 'db2' changed to ONLINE. Now you can wait some time and check its new roles.

[root@localhost mysql-mmm]# mmm_control show 。

db1(10.88.49.118) master/ONLINE. Roles: reader(10.88.49.135), writer(10.88.49.130) 。

db2(10.88.49.119) master/ONLINE. Roles: reader(10.88.49.131), reader(10.88.49.132) 。

db3(10.88.49.122) slave/ONLINE. Roles: reader(10.88.49.133), reader(10.88.49.134) 。

see db2 is online 。

15.5 change writer to db2 。

mmm_control move_role writer db2 。

相关文章

http://blog.csdn.net/hguisu/article/details/7349562 。

http://blog.chinaunix.net/uid-28437434-id-3471237.html 。

http://mysql-mmm.org/downloads ,

http://mysql-mmm.org/mmm2:guide 。

http://dev.mysql.com/doc/internals/en/optimizer-primary-optimizations.html 。

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