mysql-mmm安装无错版

一、环境
mysql-db1(192.168.1.251)
mysql-db2(192.168.1.252)
writer vip 192.168.1.180
read vip 192.168.1.181 192.168.1.182

二、软件安装
1、mysql安装及用户添加
tar -zxvf mysql-5.1.31.tar.gz
cd mysql-5.1.31
./configure --prefix=/usr/local/mysql --with-charset=utf8 --with-extra-charsets=all --enable-assembler --enable-thread-safe-client --with-big-tables --with-readline --with-ssl --with-embedded-server --enable-local-infile --with-plugins=innobase
make;make install

groupadd mysql
useradd -g mysql mysql
cp /usr/local/mysql/share/mysql/my-medium.cnf /etc/my.cnf
sed -i 's/skip-federated/#skip-federated/g' /etc/my.cnf

/usr/local/mysql/bin/mysql_install_db --user=mysql
chown -R mysql /usr/local/mysql/var
chgrp -R mysql /usr/local/mysql/.
cp /usr/local/mysql/share/mysql/mysql.server /etc/init.d/mysql
chmod 755 /etc/init.d/mysql
chkconfig --level 345 mysql on
echo "/usr/local/mysql/lib/mysql" >> /etc/ld.so.conf
ldconfig
ln -s /usr/local/mysql/lib/mysql /usr/lib/mysql
ln -s /usr/local/mysql/include/mysql /usr/include/mysql
service mysql start
/usr/local/mysql/bin/mysqladmin -u root password root
service mysql stop
service mysql start
cd ..

grant all on *.* to root@'%' identified by 'root';  //远程连接用的
grant replication slave,file on *.* to replicant@'%' identified by 'slave'; //主主用的
grant super,replication client,process on *.* to mmm_agent@'%' identified by 'RepAgent';  //mmm用的
grant replication client on *.* to mmm_monitor@'%' identified by 'RepMonitor'; //也是mm用的

2、mysql主主安装
[root@jboss1 ~]#vi /etc/my.cnf
....
server-id       = 2

replicate-do-db=akin
replicate-ignore-db=
log-slave-updates
slave-skip-errors=all
sync_binlog=1
auto_increment_increment=2
auto_increment_offset=1
master-host     =   192.168.1.252
master-user     =   replicant
master-password =   slave
master-port     = 3306

[root@jboss2 ~]# vi /etc/my.cnf
.....
server-id       = 1

replicate-do-db=akin
replicate-ignore-db=
log-slave-updates
slave-skip-errors=all
sync_binlog=1
auto_increment_increment=2
auto_increment_offset=2
master-host     =   192.168.1.251
master-user     =   replicant
master-password =   slave
master-port     = 3306

启动调试，至到主主没问题后，我们再来安装mysql-mmmm

3、mysql-mmm安装及配置
(1)升级perl模块
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
这两个File::Basename File::stat模块好像安装不上，要升级5.12.2才可以，不安装也可以使用,Net:ARP必须要安装，要不然VIP会出不来的!

(2)下载并安装mysql-mmm
wget http://mysql-mmm.org/_media/:mmm2:mysql-mmm-2.2.1.tar.gz -O mysql-mmm-2.2.1.tar.gz
tar -zxvf mysql-mmm-2.2.1.tar.gz
cd mysql-mmm-2.2.1
make;make install
cd ..

(3)mysql-mmm配置
这个也非常简单，真接在配置文件里面修改就OK了！
[root@jboss1 mysql-mmm]# ls  /etc/mysql-mmm/
mmm_agent.conf  mmm_common.conf  mmm_mon.conf  mmm_tools.conf

[root@jboss1 mysql-mmm]# cat mmm_agent.conf
include mmm_common.conf
this db1
//如果在第二台机器上，db1那里做相应的更改

[root@jboss1 mysql-mmm]# cat mmm_common.conf
active_master_role      writer

<host default>
        cluster_interface eth0

        pid_path  /var/run/mmm_agentd.pid
        bin_path  /usr/lib/mysql-mmm/

 replication_user        replication
 replication_password    slave

        agent_user  mmm_agent
        agent_password  RepAgent
</host>

<host db1>
        ip   192.168.1.251
        mode   master
        peer   db2
</host>

<host db2>
        ip   192.168.1.252
        mode   master
        peer   db1
</host>

<role writer>
        hosts   db1, db2
        ips   192.168.1.180
        mode   exclusive
</role>

<role reader>
        hosts   db1, db2
        ips   192.168.1.181,192.168.1.182
        mode   balanced
</role>

//只有两种模式：exclusive是排他，在这种模式下任何时候只能一个host拥有该角色，balanced模式下可以多个host同时拥有此角色。一般writer是ex，reader是ba
[root@jboss1 mysql-mmm]# cat 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                                192.168.1.251,192.168.1.252
</monitor>

<host default>
        monitor_user                    mmm_monitor
        monitor_password                RepMonitor
</host>

debug 0

//auto_set_online 5为自动切换的时候，单位为秒

scp mmm_common.conf [email protected]:/etc/mysql-mmm/
//把mmm_common.conf复制到DB2上！

配置db2
其他不用动，修改
[root@jboss2 mysql-mmm]# cat mmm_agent.conf
include mmm_common.conf
this db2
//this这里修改为db2就好了，，这里对应mmmm_common.conf里面的内容

(4)启动mmm的服务
DB1启动agent和mon
/etc/init.d/mysql-mmm-agent start
/etc/init.d/mysql-mmm-monitor start
DB2启动agent
/etc/init.d/mysql-mmm-agent start

(5)查看及相关
[root@jboss1 ~]# mmm_control ping
OK: Pinged successfully!
如果是连不上，，请查看mmm_mon.conf里面的配置！
[root@jboss1 ~]# mmm_control show
  db1(192.168.1.251) master/ONLINE. Roles: reader(192.168.1.182), writer(192.168.1.180)
  db2(192.168.1.252) master/ONLINE. Roles: reader(192.168.1.181)
显示信息
[root@jboss1 ~]# mmm_control checks
db2  ping         [last change: 2010/11/04 22:19:42]  OK
db2  mysql        [last change: 2010/11/04 22:48:03]  OK
db2  rep_threads  [last change: 2010/11/04 22:19:42]  OK
db2  rep_backlog  [last change: 2010/11/04 22:19:42]  OK: Backlog is null
db1  ping         [last change: 2010/11/04 22:19:42]  OK
db1  mysql        [last change: 2010/11/04 22:19:42]  OK
db1  rep_threads  [last change: 2010/11/04 22:48:53]  OK
db1  rep_backlog  [last change: 2010/11/04 22:19:42]  OK: Backlog is null
检测是否正常
[root@jboss1 ~]# mmm_control set_online db1
OK: This host is already ONLINE. Skipping command.
[root@jboss1 ~]# mmm_control set_online db2
OK: This host is already ONLINE. Skipping command.
设置服务器上线
[root@jboss1 ~]# mmm_control help
Valid commands are:
    help                              - show this message
    ping                              - ping monitor
    show                              - show status
    checks [<host>|all [<check>|all]] - show checks status
    set_online <host>                 - set host <host> online
    set_offline <host>                - set host <host> offline
    mode                              - print current mode.
    set_active                        - switch into active mode.
    set_manual                        - switch into manual mode.
    set_passive                       - switch into passive mode.
    move_role [--force] <role> <host> - move exclusive role <role> to host <host>
                                        (Only use --force if you know what you are doing!)
    set_ip <ip> <host>                - set role with ip <ip> to host <host>
其他一引起帮助信息

(5)测试切换
DB1上的信息
 [root@jboss1 ~]# mmm_control show
  db1(192.168.1.251) master/ONLINE. Roles: reader(192.168.1.182), writer(192.168.1.180)
  db2(192.168.1.252) master/ONLINE. Roles: reader(192.168.1.181)

[root@jboss1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:0c:29:9d:93:dd brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.251/24 brd 192.168.1.255 scope global eth0
    inet 192.168.1.182/32 scope global eth0
    inet 192.168.1.180/32 scope global eth0
    inet6 fe80::20c:29ff:fe9d:93dd/64 scope link
       valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0
DB2上的信息
[root@jboss2 mysql-mmm]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:0c:29:6e:42:93 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.252/24 brd 192.168.1.255 scope global eth0
    inet 192.168.1.181/32 scope global eth0
    inet6 fe80::20c:29ff:fe6e:4293/64 scope link
       valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0

现在我们来停掉DB1上的mysql，，它会把所有的VIP都切换的DB2上，，操作如下
DB1上的信息
[root@jboss1 ~]# service mysql stop
Shutting down MySQL..                                      [  OK  ]
[root@jboss1 ~]# mmm_control show
  db1(192.168.1.251) master/HARD_OFFLINE. Roles:
  db2(192.168.1.252) master/ONLINE. Roles: reader(192.168.1.181), reader(192.168.1.182), writer(192.168.1.180)

[root@jboss1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:0c:29:9d:93:dd brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.251/24 brd 192.168.1.255 scope global eth0
    inet6 fe80::20c:29ff:fe9d:93dd/64 scope link
       valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0
再看DB2上的信息
[root@jboss2 mysql-mmm]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:0c:29:6e:42:93 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.252/24 brd 192.168.1.255 scope global eth0
    inet 192.168.1.181/32 scope global eth0
    inet 192.168.1.182/32 scope global eth0
    inet 192.168.1.180/32 scope global eth0
    inet6 fe80::20c:29ff:fe6e:4293/64 scope link
       valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0

 

到些本文就完成了，在mysql-mmmm的基础上，再加一个mysql-proxy就可以实现读写分离了！

PS:如要是CENTOS的用户，可以更省事，直接用YUM升级就OK

rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm
yum install mysql-mmm* -y