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《Mysql必读MySQL高可用MMM方案安装部署分享》要点：
本文介绍了Mysql必读MySQL高可用MMM方案安装部署分享，希望对您有用。如果有疑问，可以联系我们。
1 install mysql MYSQL入门
? 请参考/article/47094.htmMYSQL入门
2. Basic configuration of master 1 MYSQL入门
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 MYSQL入门
4. Synchronisation of data between both databases MYSQL入门
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'; MYSQL入门
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. MYSQL入门
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 MYSQL入门
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/MYSQL入门
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-agentMYSQL入门
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
<monitor>
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>
<host default>
monitor_user mmm_monitor
monitor_password mmm_monitor
</host>
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:0CMYSQL入门
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 MYSQL入门
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 MYSQL入门
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 UnreachableMYSQL入门
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 MYSQL入门
[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! MYSQL入门
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]MYSQL入门
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 MYSQL入门
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 MYSQL入门
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 MYSQL入门
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! MYSQL入门
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 statusG
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.88.49.119 MYSQL入门
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...MYSQL入门
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 MYSQL入门
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 statusG
*************************** 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. MYSQL入门
15.3.2 start mysqld on slave_host of 10.88.49.122 MYSQL入门
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(10.88.49.133)
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),reader(10.88.49.133)
db3(10.88.49.122) slave/ONLINE. Roles: reader(10.88.49.132),reader(10.88.49.134) MYSQL入门
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),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 MYSQL入门
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),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(10.88.49.134)
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),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 MYSQL入门
15.5 change writer to db2
mmm_control move_role writer db2MYSQL入门
（编辑：李大同）
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