MySQL+Amoeba+MySQLMMM高可用群集

一、MySQL-MMM(Master-Master MySQL)

MMM概述

• 双主故障切换和日常管理的脚本程序
• 由多个mysql主服务器和多个mysql从服务器组成
• 虽然叫做双主复制，但是业务上同一时刻只允许对一个主进行写入，另一台备选主上提供部分读服务，
• MMM使用Perl语言开发，主要用来监控和管理MySQL Master-Master（双主）复制
• 其内部附加的工具脚本也可以实现多个slave的read负载均衡。

注：

• 同一时刻只允许一个主进行写入，额外主提供部分读的服务

• 不适用于要求数据一致性很高的场合(可替换产品为：Heartbeat+DRBD+MySQL高可用方案)

MMM组成

• mmm_mond：监控进程，负责所有的监控、决定和处理所有节点
• mmm_agentd：运行在每个MySQL数据库的代理进程，完成监控本地状态并于监控端通信
• mmm_control：一个脚本，提供mmm_mond进程的命令

二、案例

实验环境：
六台Centos6,两台主mysql（master01、master02）,两台从mysql（slave01、slave02）,一台监控（mmm_mond）,一台读写调度器（amoeba）

先部署主主（master01与master02）复制

Master01

1.准备工作

vim /etc/sysconfig/network-scripts/ifcfg-eth0    DEVICE=eth0    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=static    IPADDR=192.168.1.10    NETMASK=255.255.255.0

vim /etc/sysconfig/network-scripts/ifcfg-eth2    DEVICE=eth2    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=dhcp

vim /etc/hosts    192.168.1.10    db1    192.168.1.20    db2    192.168.1.30    db3    192.168.1.40    db4

vim /etc/sysconfig/network    HOSTNAME=db1

reboot

2.YUM源配置并安装MMM

rm -rf /etc/yum.repos.d/*

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

yum -y install epel-release

yum -y install mysql-mmm* mysql mysql-server mysql-devel

3.MySQL配置

/etc/init.d/mysqld start && chkconfig --level 35 mysqld on

mysqladmin -uroot password "123"

cp /usr/share/doc/mysql-server-5.1.73/my-medium.cnf /etc/my.cnf

vim /etc/my.cnf    [mysqld]    50 log-slave-updates

/etc/init.d/mysqld restart

4.授权并主主同步

mysql -u root -pmysql> grant replication slave on *.* to 'slave'@'192.168.1.%' identified by '123';mysql> show master status;+------------------+----------+--------------+------------------+| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |+------------------+----------+--------------+------------------+| mysql-bin.000001 |      647 |              |                  |+------------------+----------+--------------+------------------+1 row in set (0.00 sec)mysql> change master to master_host='192.168.1.20',master_user='slave',master_password='123',master_log_file='mysql-bin.000001',master_log_pos=481;//所跟IP、log、pos等信息都为第二台主的信息mysql> start slave;mysql> show slave status\G;//查看同步状态，I/0和SQL线程状态为yes则正确

Master02

1.准备工作

vim /etc/sysconfig/network-scripts/ifcfg-eth0    DEVICE=eth0    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=static    IPADDR=192.168.1.20    NETMASK=255.255.255.0

vim /etc/sysconfig/network-scripts/ifcfg-eth2    DEVICE=eth2    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=dhcp

vim /etc/hosts    192.168.1.10    db1    192.168.1.20    db2    192.168.1.30    db3    192.168.1.40    db4

vim /etc/sysconfig/networkHOSTNAME=db2

reboot

2.YUM源配置并安装MMM

rm -rf /etc/yum.repos.d/*

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

yum -y install epel-release

yum -y install mysql-mmm* mysql mysql-server mysql-devel

3.MySQL配置

/etc/init.d/mysqld start && chkconfig --level 35 mysqld on

mysqladmin -uroot password "123"

cp /usr/share/doc/mysql-server-5.1.73/my-medium.cnf /etc/my.cnf

vim /etc/my.cnf    [mysqld]    50 log-slave-updates    58 server-id = 2

/etc/init.d/mysqld restart

4.授权并主主同步

mysql -u root -pmysql> grant replication slave on *.* to 'slave'@'192.168.1.%' identified by '123';mysql> show master status;+------------------+----------+--------------+------------------+| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |+------------------+----------+--------------+------------------+| mysql-bin.000001 |      481 |              |                  |+------------------+----------+--------------+------------------+1 row in set (0.00 sec)mysql> change master to master_host='192.168.1.10',master_user='slave',master_password='123',master_log_file='mysql-bin.000001',master_log_pos=647;//所跟IP、log、pos等信息都为第一台主的信息mysql> start slave;mysql> show slave status\G;

再部署两对主从复制（m1与s1，m2与s2）

Slave01

1.准备工作

vim /etc/sysconfig/network-scripts/ifcfg-eth0    DEVICE=eth0    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=static    IPADDR=192.168.1.30    NETMASK=255.255.255.0

vim /etc/sysconfig/network-scripts/ifcfg-eth2    DEVICE=eth2    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=dhcp

vim /etc/hosts    192.168.1.10    db1    192.168.1.20    db2    192.168.1.30    db3    192.168.1.40    db4

vim /etc/sysconfig/network    HOSTNAME=db3

reboot

2.YUM源配置并安装MMM

rm -rf /etc/yum.repos.d/*

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

yum -y install epel-release

yum -y install mysql-mmm* mysql mysql-server mysql-devel

3.MySQL配置

/etc/init.d/mysqld start && chkconfig --level 35 mysqld on

mysqladmin -uroot password "123"

cp /usr/share/doc/mysql-server-5.1.73/my-medium.cnf /etc/my.cnf

vim /etc/my.cnf    [mysqld]    50 relay-log=relay-log-bin    51 relay-log-index=slave-relay-bin.index    59 server-id = 3

/etc/init.d/mysqld restart

4.授权并主从同步（m1,s1）

mysql -u root -pmysql> change master to master_host='192.168.1.10',master_user='slave',master_password='123',master_log_file='mysql-bin.000001',master_log_pos=647;//所跟IP、log、pos等信息都为第一台主的信息mysql> start slave;mysql> show slave status\G;

Slave02

1.准备工作

vim /etc/sysconfig/network-scripts/ifcfg-eth0    DEVICE=eth0    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=static    IPADDR=192.168.1.40    NETMASK=255.255.255.0

vim /etc/sysconfig/network-scripts/ifcfg-eth2    DEVICE=eth2    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=dhcp

vim /etc/hosts    192.168.1.10    db1    192.168.1.20    db2    192.168.1.30    db3    192.168.1.40    db4

2.YUM源配置并安装MMM

rm -rf /etc/yum.repos.d/*

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

yum -y install epel-release

yum -y install mysql-mmm* mysql mysql-server mysql-devel

3.MySQL配置

/etc/init.d/mysqld start && chkconfig --level 35 mysqld on

mysqladmin -uroot password "123"

cp /usr/share/doc/mysql-server-5.1.73/my-medium.cnf /etc/my.cnf

vim /etc/my.cnf    [mysqld]    50 relay-log=relay-log-bin    51 relay-log-index=slave-relay-bin.index    59 server-id = 4

/etc/init.d/mysqld restart

4.授权并主从同步（m2,s2）

mysql -u root -pmysql> change master to master_host='192.168.1.20',master_user='slave',master_password='123',master_log_file='mysql-bin.000001',master_log_pos=647;//所跟IP、log、pos等信息都为第二台主的信息mysql> start slave;mysql> show slave status\G;

配置高可用MySQL-MMM

Master01

1.新建授权用户

mysql> grant super,replication client,process on *.* to 'mmm_agent'@'192.168.1.%' identified by '123';//主服务器授权，从服务器自动同步mysql> grant replication client on *.* to 'mmm_monitor'@'192.168.1.%' identified by '123';           //主服务器授权，从服务器自动同步mysql> grant all on *.* to 'test'@'192.168.1.%' identified by '123';                    //新建测试用户

2.配置MMM_COMMON

vim /etc/mysql-mmm/mmm_common.conf    active_master_role      writer                cluster_interface       eth0                    //集群IP承载的接口            pid_path                /var/run/mysql-mmm/mmm_agentd.pid       //PID文件位置(存放MMM的进程号)            bin_path                /usr/libexec/mysql-mmm/         //运行命令位置            replication_user        slave                   //需使用主从同步时授权用户            replication_password    123            agent_user              mmm_agent                   //代理连接            agent_password          123                    ip      192.168.1.10            mode    master            peer    db2                     //当db1主机不能使用，自动切换到db2                    ip      192.168.1.20            mode    master                  //当前服务器作为主服务器(写)            peer    db1                     //当db2主机不能使用，自动切换到db1                    ip      192.168.1.30            mode    slave                    ip      192.168.1.40            mode    slave                   //当前主机作为从服务器(读)                    hosts   db1, db2            ips     192.168.1.250               //写服务器VIP            mode    exclusive                   //只有一个host可以writer                    hosts   db3, db4            ips     192.168.1.251, 192.168.1.252        //读服务器VIP            mode    balanced                    //多个host可以reader    

3.配置MMM_AGENT

vim /etc/mysql-mmm/mmm_agent.confinclude mmm_common.confthis db1

4.拷贝文件给其余主机

scp /etc/mysql-mmm/mmm_common.conf root@192.168.1.20:/etc/mysql-mmm/scp /etc/mysql-mmm/mmm_common.conf root@192.168.1.30:/etc/mysql-mmm/scp /etc/mysql-mmm/mmm_common.conf root@192.168.1.40:/etc/mysql-mmm/

/etc/init.d/mysql-mmm-agent restart && chkconfig --level 35 mysql-mmm-agent on

Master02

配置MMM_AGENT

vim /etc/mysql-mmm/mmm_agent.confthis db2

/etc/init.d/mysql-mmm-agent restart && chkconfig --level 35 mysql-mmm-agent on

Slave01

配置MMM_AGENT

vim /etc/mysql-mmm/mmm_agent.confthis db3

/etc/init.d/mysql-mmm-agent restart && chkconfig --level 35 mysql-mmm-agent on

Slave02

配置MMM_AGENT

vim /etc/mysql-mmm/mmm_agent.confthis db4

/etc/init.d/mysql-mmm-agent restart && chkconfig --level 35 mysql-mmm-agent on

监控配置（mmm_mon）

1.准备工作

vim /etc/sysconfig/network-scripts/ifcfg-eth0    DEVICE=eth0    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=static    IPADDR=192.168.1.50    NETMASK=255.255.255.0

vim /etc/sysconfig/network-scripts/ifcfg-eth2    DEVICE=eth2    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=dhcp

vim /etc/hosts    192.168.1.10    db1    192.168.1.20    db2    192.168.1.30    db3    192.168.1.40    db4

reboot

2.YUM源配置并安装MMM

rm -rf /etc/yum.repos.d/*

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

yum -y install epel-release

yum -y install mysql-mmm* mysql

3.配置MMM_COMMON

scp 192.168.1.10:/etc/mysql-mmm/mmm_common.conf /etc/mysql-mmm/

4.配置MMM_MON

vim /etc/mysql-mmm/mmm_mon.conf    include mmm_common.conf                ip                  127.0.0.1            ping_ips            192.168.1.10,192.168.1.20,192.168.1.30,192.168.1.40                    monitor_user        mmm_monitor            monitor_password    123        debug 0

5.启动服务并验证

/etc/init.d/mysql-mmm-monitor restart && chkconfig --level 35 mysql-mmm-monitor on  //监控端启动

mmm_control show                                    //查看节点状态

mysql -u test -p -h 192.168.1.250

报错解决方案：

[root@localhost ~]# mysql -u test -p -h 192.168.1.250Enter password:ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.1.254' (113)

主服务器：

grant super,replication client,process on *.* to 'mmm_agent'@'db1' identified by '123';grant super,replication client,process on *.* to 'mmm_agent'@'db2' identified by '123';grant super,replication client,process on *.* to 'mmm_agent'@'db3' identified by '123';grant super,replication client,process on *.* to 'mmm_agent'@'db4' identified by '123';

日志查看：

tail -f /var/log/mysql-mmm/mmm_agentd.log                       //MySQL端的Agent日志

tail -f /var/log/mysql-mmm/mmm_mond.log                     //监控机端的Monitor日志

部署读写调度器Amoeba

1.环境准备

vim /etc/sysconfig/network-scripts/ifcfg-eth0    DEVICE=eth0    TYPE=Ethernet    ONBOOT=yes    NM_CONTROLLED=no    BOOTPROTO=static    IPADDR=192.168.1.254    NETMASK=255.255.255.0

2.安装jdk与amoeba

yum -y erase java-*

chmod +x jdk-6u14-linux-x64.bin

./jdk-6u14-linux-x64.bin

mv jdk1.6.0_14/ /usr/local/jdk1.6

vim /etc/profileexport JAVA_HOME=/usr/local/jdk1.6export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/libexport PATH=$JAVA_HOME/lib:$JAVA_HOME/jre/bin/:$PATH:$HOME/binexport AMOEBA_HOME=/usr/local/amoebaexport PATH=$PATH:$AMOEBA_HOME/bin

source /etc/profile && java -version

mkdir /usr/local/amoeba

tar zxvf amoeba-mysql-binary-2.2.0.tar.gz -C /usr/local/amoeba/

chmod -R 755 /usr/local/amoeba/

3.在主Mysql数据库新建授权用户

mysql -u root -p    mysql> grant all on *.* to haha@'192.168.1.%' identified by '123';

4.编辑amoeba配置文件

vim /usr/local/amoeba/conf/amoeba.xml 30                hehe            //设置连接Amoeba用户 31 32                123         //设置连接Amoeba用户115                 slaves116117                 master        注意删除的注释118                 slaves         //定义读服务器池

vim /usr/local/amoeba/conf/dbServers.xml 25                          26                         haha               //设置连接Mysql的用户 27 28                         123                //设置连接mysql的密码注意删除的注释 43          44                  45                          46                         192.168.1.254         //定义写服务器IP 47                  48          49          50                  51                          52                         192.168.1.30          //定义读服务器IP 53                  54          55          56                  57                          58                         192.168.1.40          //定义读服务器IP 59                  60 61          62          68                         slave1,slave2     //定义输入slaves读服务器池的主机 69                 

amoeba start &

netstat -utpln | grep 8066

5.连接测试

client：mysql -u hehe -p -h 192.168.1.254 -P 8066