mysq的mmm高可用

Posted 2020-08-31

MMM实现mysql高可用

 

一、MMM介绍

 

 

二、MySQL-MMM工作关系图

 

 

三、MySQL-MMM工作原理图

 

 

四、案例环境使用五台服务器模拟搭建，具体环境如下所示

主机名称	操作系统	IP地址	VIP	主要软件
M1	CentOS 6.5 x86_64	192.168.200.21	192.168.200.30	MySQL-MMM 2.2.1
M2	CentOS 6.5 x86_64	192.168.200.22		MySQL-MMM 2.2.1
S1	CentOS 6.5 x86_64	192.168.200.23	192.168.200.33	MySQL-MMM 2.2.1
S2	CentOS 6.5 x86_64	192.168.200.24	192.168.200.34	MySQL-MMM 2.2.1
monitor	CentOS 6.5 x86_64	192.168.200.25	无	MySQL-MMM 2.2.1

 

五、案例实施

1.1 环境准备

[[email protected] ~]# cat /etc/hosts

192.168.200.21m1

192.168.200.22m2

192.168.200.23s1

192.168.200.24s2

192.168.200.25monitor

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4

::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

[[email protected] ~]# scp /etc/hosts m2:/etc/hosts

[[email protected] ~]# scp /etc/hosts s1:/etc/hosts

[[email protected] ~]# scp /etc/hosts s2:/etc/hosts

[[email protected] ~]# scp /etc/hosts monitor:/etc/hosts

 

1.2 搭建MMM, MySQL多主多从模式replication

1.2.1 安装MySQL并配置 (m1 m2 s1 s2)

[[email protected] ~]# yum -y install mysql mysql-server mysql-devel

注意：在m2 s1 s2 上做同样的操作,大家一定要注意：对后续实验过程中对perl语言开发环境的完整支持，记得要将centos6.5的两张光盘都要做到yum仓库中去。

1.2.3 配置m1 m2 s1 s2

[[email protected] ~]# vi /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

log-error=/var/lib/mysql/mysql.err

log=/var/lib/mysql/query_log.log

log-slow-queries=/var/lib/mysql/slow_query_log.log

user=mysql

default-character-set=utf8

log-bin=mysql-bin

server-id=1

binlog-ignore-db=mysql,information_schema,test

log-slave-updates

sync_binlog=1

auto_increment_increment=2

auto_increment_offset=1

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

[client]

default-character-set=utf8

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

注意：每台mysql主机server-id不能相同，其它配置文件参数相同即可！

比如：m1 --- server-id=1

m2 --- server-id=2

s1 --- server-id=3

s2 --- server-id=4

 

[[email protected] ~]# scp /etc/my.cnf m2:/etc/my.cnf

[[email protected] ~]# scp /etc/my.cnf s1:/etc/my.cnf

[[email protected] ~]# scp /etc/my.cnf s2:/etc/my.cnf

[[email protected]2 ~]# sed -i ‘/ server-id/ s/1/2/g‘ /etc/my.cnf

[[email protected]s1 ~]# sed -i ‘/ server-id/ s/1/3/g‘ /etc/my.cnf

[[email protected]s2 ~]# sed -i ‘/ server-id/ s/1/4/g‘ /etc/my.cnf

分别在m1 m2 s1 s2上启动mysql服务

[[email protected] ~]# /etc/init.d/mysqld start

[[email protected] ~]# chkconfig mysqld on

[[email protected] ~]# mysqladmin -uroot password "123"

 

1.2.4 MySQL配置m1 m2上为AA复制模式

1.2.4.1 先产看下log bin日志和postion值位置

[[email protected] ~]# mysql -uroot -p123

mysql> show master status;

+------------------+----------+--------------+-------------------------------+

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB              |

+------------------+----------+--------------+-------------------------------+

| mysql-bin.000003 |      249 |              | mysql,information_schema,test |

+------------------+----------+--------------+-------------------------------+

[[email protected] ~]# mysql -uroot -p123

mysql> show master status;

+------------------+----------+--------------+-------------------------------+

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB              |

+------------------+----------+--------------+-------------------------------+

| mysql-bin.000003 |      249 |              | mysql,information_schema,test |

+------------------+----------+--------------+-------------------------------+

1.2.4.2 m1 m2互相提升访问权限

在m1上的操作：

mysql> grant replication slave on *.* to ‘replication‘@‘192.168.200.%‘ identified by ‘123‘;

mysql> flush privileges;

在m2上的操作：

mysql> grant replication slave on *.* to ‘replication‘@‘192.168.200.%‘ identified by ‘123‘;

mysql> flush privileges;

mysql> change master to master_host=‘192.168.200.21‘,

    -> master_user=‘replication‘,master_password=‘123‘,

    -> master_log_file=‘mysql-bin.000003‘,

    -> master_log_pos=249;

mysql> start slave;

mysql> show slave status\G;

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

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.200.21

                  Master_User: replication

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000003

          Read_Master_Log_Pos: 492

               Relay_Log_File: mysqld-relay-bin.000002

                Relay_Log_Pos: 494

        Relay_Master_Log_File: mysql-bin.000003

             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: 492

              Relay_Log_Space: 650

              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)

在m1上的操作：

mysql> change master to master_host=‘192.168.200.22‘, master_user=‘replication‘,master_password=‘123‘, master_log_file=‘mysql-bin.000003‘, master_log_pos=249;

Query OK, 0 rows affected (0.02 sec)

 

mysql> start slave;

Query OK, 0 rows affected (0.00 sec)

 

mysql> show slave status\G;

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

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.200.22

                  Master_User: replication

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000003

          Read_Master_Log_Pos: 735

               Relay_Log_File: mysqld-relay-bin.000002

                Relay_Log_Pos: 494

        Relay_Master_Log_File: mysql-bin.000003

             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: 735

              Relay_Log_Space: 650

              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)

1.2.4.3 测试AA复制同步，在mysql-m2上新建一个库yylin

mysql> create database yylin;

Query OK, 1 row affected (0.00 sec)

 

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| test               |

| yylin              |

+--------------------+

在m1上查看测试：

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| test               |

| yylin              |

+--------------------+

4 rows in set (0.01 sec)

1.2.5 配置s1和s2作为m1 的从库

1.2.5.1 先看一下m1 上master状态值

mysql> show master status;

+------------------+----------+--------------+-------------------------------+

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB              |

+------------------+----------+--------------+-------------------------------+

| mysql-bin.000003 |      825 |              | mysql,information_schema,test |

+------------------+----------+--------------+-------------------------------+

1.2.5.2 在s1和s2分别执行:

[[email protected] ~]# mysql -uroot -p123

mysql> change master to master_host=‘192.168.200.21‘, master_user=‘replication‘,master_password=‘123‘, master_log_file=‘mysql-bin.000003‘, master_log_pos=825;

mysql> start slave;

Query OK, 0 rows affected (0.00 sec)

 

mysql> show slave status\G;

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

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.200.21

                  Master_User: replication

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000003

          Read_Master_Log_Pos: 825

               Relay_Log_File: mysqld-relay-bin.000002

                Relay_Log_Pos: 251

        Relay_Master_Log_File: mysql-bin.000003

             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: 825

              Relay_Log_Space: 407

              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)

 

1.3 安装配置mysql-MMM

1.3.1 Centos默认没有

 

[[email protected] ~]# wget http://mirrors.yun-idc.com/epel/6/x86_64/epel-release-6-8.noarch.rpm

[[email protected] ~]# rpm -ivh epel-release-6-8.noarch.rpm

在其它m2 s1 s2 monitor上均做如上操作，并在五台服务器上都安装mysql-mmm*

[[email protected] ~]# yum -y install mysql-mmm*

1.3.2 在m1 m2 s1 s2 四个节点上授权monitor访问

[[email protected] ~]# mysql -uroot -p123

mysql> grant replication client on *.* to ‘mmm_monitor‘@‘192.168.200.%‘ identified by ‘123‘;

Query OK, 0 rows affected (0.01 sec)

 

mysql> grant super,replication client, process on *.* to ‘mmm_agent‘@‘192.168.200.%‘ identified by ‘123‘;

Query OK, 0 rows affected (0.01 sec)

 

mysql> flush privileges;

1.3.3 修改/etc/mysql-mmm/mmm_common.conf配置文件，系统中所有主机(m1 m2 s1 s2 monitor)的该配置文件内容都是一样的，包括监控主机mysql-monitor

[[email protected] ~]# cd /etc/mysql-mmm/

[[email protected] mysql-mmm]# cp mmm_common.conf mmm_common.conf.bak

[[email protected] mysql-mmm]# vi /etc/mysql-mmm/mmm_common.conf

 

active_master_role      writer

 

<host default>

    cluster_interface       eth1

    pid_path                /var/run/mysql-mmm/mmm_agentd.pid

    bin_path                /usr/libexec/mysql-mmm/

    replication_user        replication

    replication_password    123

    agent_user              mmm_agent

    agent_password          123

</host>

 

<host db1>

    ip      192.168.200.21

    mode    master

    peer    db2

</host>

 

<host db2>

    ip      192.168.200.22

    mode    master

    peer    db1

</host>

 

<host db3>

    ip      192.168.200.23

    mode    slave

</host>

 

<host db4>

    ip      192.168.200.24

    mode    slave

</host>

 

<role writer>

    hosts   db1, db2

    ips     192.168.200.30

    mode    exclusive

</role>

 

<role reader>

    hosts   db3, db4

    ips     192.168.200.31, 192.168.200.32

    mode    balanced

</role>

[[email protected] mysql-mmm]# scp mmm_common.conf m2:/etc/mysql-mmm/mmm_common.conf

[[email protected] mysql-mmm]# scp mmm_common.conf s1:/etc/mysql-mmm/mmm_common.conf

[[email protected] mysql-mmm]# scp mmm_common.conf s2:/etc/mysql-mmm/mmm_common.conf

[[email protected] mysql-mmm]# scp mmm_common.conf \

monitor:/etc/mysql-mmm/mmm_common.conf

1.3.4 在数据库主机(m1 m2 s1 s2)上我们需要编辑/etc/mysql-mmm/mmm_agent.conf 文件，根据不同的主机修改为不同的值:

[[email protected] mysql-mmm]# cp mmm_agent.conf mmm_agent.conf.bak

[[email protected] mysql-mmm]# vi mmm_agent.conf

include mmm_common.conf

 

# The ‘this‘ variable refers to this server.  Proper operation requires

# that ‘this‘ server (db1 by default), as well as all other servers, have the

# proper IP addresses set in mmm_common.conf.

this db1

上面的db1在不同的数据库机器上(m1 m2 s1 s2)分别修改为:db1、db2、db3和db4

[[email protected] ~]# cd /etc/mysql-mmm/

[[email protected] mysql-mmm]# sed -i ‘/^this/ s/1/2/g‘ mmm_agent.conf

[[email protected] ~]# cd /etc/mysql-mmm/

[[email protected] mysql-mmm]# sed -i ‘/^this/ s/1/3/g‘ mmm_agent.conf

[[email protected] ~]# cd /etc/mysql-mmm/

[[email protected] mysql-mmm]# sed -i ‘/^this/ s/1/4/g‘ mmm_agent.conf

 

1.3.5 在监控主机(monitor)上我们需要编辑/etc/mysql-mmm/mmm_mon.conf

[[email protected] ~]# cd /etc/mysql-mmm/

[[email protected] mysql-mmm]# cp mmm_mon.conf mmm_mon.conf.bak

[[email protected] mysql-mmm]# vi mmm_mon.conf

include mmm_common.conf

 

<monitor>

    ip                  127.0.0.1

    pid_path            /var/run/mysql-mmm/mmm_mond.pid

    bin_path            /usr/libexec/mysql-mmm

    status_path         /var/lib/mysql-mmm/mmm_mond.status

    ping_ips            192.168.200.21,192.168.200.22,192.168.200.23,192.168.200.24

    auto_set_online     10

 

    # The kill_host_bin does not exist by default, though the monitor will

    # throw a warning about it missing.  See the section 5.10 "Kill Host

    # Functionality" in the PDF documentation.

    #

    # kill_host_bin     /usr/libexec/mysql-mmm/monitor/kill_host

    #

</monitor>

 

<host default>

    monitor_user        mmm_monitor

    monitor_password    123

</host>

 

debug 0

1.3.6 启动代理

[[email protected] ~]# /etc/init.d/mysql-mmm-agent start

Starting MMM Agent Daemon:                                 [确定]

[[email protected] ~]# /etc/init.d/mysql-mmm-agent start

Starting MMM Agent Daemon:                                 [确定]

[[email protected] ~]# /etc/init.d/mysql-mmm-agent start

Starting MMM Agent Daemon:                                 [确定]

[[email protected] ~]# /etc/init.d/mysql-mmm-agent start

Starting MMM Agent Daemon:                                 [确定]

 

1.3.7 启动监控

[[email protected] ~]# /etc/init.d/mysql-mmm-monitor start

Starting MMM Monitor Daemon:                               [确定]

 

1.3.8 测试集群

[[email protected] mysql-mmm]# mmm_control show

  db1(192.168.200.21) master/ONLINE. Roles: writer(192.168.200.30)

  db2(192.168.200.22) master/ONLINE. Roles:

  db3(192.168.200.23) slave/ONLINE. Roles: reader(192.168.200.32)

  db4(192.168.200.24) slave/ONLINE. Roles: reader(192.168.200.31)

 

 

主库或者从库宕机，会有十秒左右时间，数据不能够查询和插入

 

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