mysql高可用方案之MMM

环境规划： 主db1 IP:192.168.1.247 host:tong1 主db2 IP:192.168.1.248 host:tong2 从db3 IP:192.168.1.249 host:tong3 monitor IP:192.168.1.249 host:tong3 数据库:mysql-5.6.21 mysqldba技术群 378190849 武汉-linux运维群 236415619 1.网络环境布置 ton

环境规划：

主db1       IP:192.168.1.247   host:tong1

主db2       IP:192.168.1.248   host:tong2

从db3       IP:192.168.1.249   host:tong3

monitor     IP:192.168.1.249   host:tong3

数据库:mysql-5.6.21

mysql dba技术群 378190849

武汉-linux运维群 236415619

 

1.网络环境布置

tong1数据节点:

[root@tong1 ~]# ifconfig  eth0
eth0      Link encap:Ethernet  HWaddr 10:78:D2:C7:83:03 
          inet addr:192.168.1.247  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::1278:d2ff:fec7:8303/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4953337 errors:0 dropped:0 overruns:0 frame:0
          TX packets:78512 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:346785301 (330.7 MiB)  TX bytes:5389268 (5.1 MiB)

[root@tong1 ~]# cat /etc/hosts
192.168.1.247 tong1
192.168.1.248 tong2
192.168.1.249 tong3

[root@tong1 ~]#

 

tong2数据节点:

[root@tong2 ~]# ifconfig  eth0
eth0      Link encap:Ethernet  HWaddr 10:78:D2:C7:17:E8 
          inet addr:192.168.1.248  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::1278:d2ff:fec7:17e8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4930658 errors:0 dropped:0 overruns:0 frame:0
          TX packets:19441 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:315661835 (301.0 MiB)  TX bytes:2133138 (2.0 MiB)

[root@tong2 ~]# cat /etc/hosts
192.168.1.247 tong1
192.168.1.248 tong2
192.168.1.249 tong3

[root@tong2 ~]#

 

tong3监控节点:

[root@tong3 ~]# ifconfig  eth0
eth0      Link encap:Ethernet  HWaddr 10:78:D2:C8:F7:50 
          inet addr:192.168.1.249  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::1278:d2ff:fec8:f750/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:6864426 errors:0 dropped:0 overruns:0 frame:0
          TX packets:99046 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:694563286 (662.3 MiB)  TX bytes:7322797 (6.9 MiB)

[root@tong3 ~]# cat /etc/hosts
192.168.1.247 tong1
192.168.1.248 tong2
192.168.1.249 tong3
[root@tong3 ~]#

 

2.在监控节点上tong3安装mysql-mmm软件

下载地址:http://mysql-mmm.org/downloads

[root@tong3 ~]# tar xvf mysql-mmm-2.2.1.tar.gz
[root@tong3 ~]# cd mysql-mmm-2.2.1
[root@tong3 mysql-mmm-2.2.1]# make && make install

[root@tong3 mysql-mmm-2.2.1]# mmm_
mmm_agentd   mmm_backup   mmm_clone    mmm_control  mmm_mond     mmm_restore  
[root@tong3 mysql-mmm-2.2.1]# ll /etc/mysql-mmm/
total 16
-rw-r-----. 1 root root   33 Apr 29 14:06 mmm_agent.conf
-rw-r-----. 1 root root  684 Apr 29 14:06 mmm_common.conf
-rw-r-----. 1 root root  321 Apr 29 14:06 mmm_mon.conf
-rw-r-----. 1 root root 1293 Apr 29 14:06 mmm_tools.conf
[root@tong3 mysql-mmm-2.2.1]#

3.在tong1,tong2,tong3节点安装mysql数据库(步骤一样)

[root@tong1 ~]# wget http://mirrors.sohu.com/mysql/MySQL-5.6/mysql-5.6.23-linux-glibc2.5-x86_64.tar.gz

[root@tong1 ~]# tar xvf mysql-5.6.23-linux-glibc2.5-x86_64.tar.gz  -C /usr/local/

[root@tong1 ~]# cd /usr/local/

[root@tong1 ~]# mv mysql-5.6.23-linux-glibc2.5-x86_64/ mysql-5.6.23

[root@tong1 ~]# cd mysql-5.6.23/

[root@tong1 ~]# ./scripts/mysql_install_db --user=mysql --group=mysql --basedir=/usr/local/mysql-5.6.23 --datadir=/usr/local/mysql-5.6.23/data

[root@tong1 ~]# cp -a my.cnf  /etc/

[root@tong1 ~]# cp -a support-files/mysql.server  /etc/init.d/mysqld

[root@tong1 ~]# chkconfig  --add mysqld

[root@tong1 ~]# chkconfig  mysqld on

[root@tong1 ~]# vim /etc/my.cnf

basedir = /usr/local/mysql-5.6.23
datadir = /usr/local/mysql-5.6.23/data
port = 3306
server_id = 20             --server_id在三台主机不同,分别用10,20,30表示
socket = /tmp/mysql.sock

[root@tong1 ~]# pkill  mysqld

[root@tong1 ~]# /etc/init.d/mysqld  restart

[root@tong1 ~]# /usr/local/mysql-5.6.23/bin/mysqladmin  -u root password 'system'

[root@tong1 ~]# /usr/local/mysql-5.6.23/bin/mysql -u root -p  --输入密码system
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.23 MySQL Community Server (GPL)

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> exit
Bye
[root@tong1 ~]#

4.将tong1和tong2配置成主主架构

tong1节点配置文件:

[root@tong1 ~]# vim /etc/my.cnf

basedir = /usr/local/mysql-5.6.23
datadir = /usr/local/mysql-5.6.23/data
port = 3306
server_id = 20
socket = /tmp/mysql.sock

replicate-do-db=tong                 --复制tong数据库
replicate-ignore-db=mysql            --忽略mysql数据库

log-bin=mysql-bin                    --开启二进制日志
log-bin-index=mysql-bin-index

auto_increment_offset=1
auto_increment_increment=2

relay-log=relay-log                   --开启中继日志
relay-log-index=relay-log-index

log_slave_updates       --当任意一台主宕机,从可以接管主应用
sync-binlog=1

[root@tong1 ~]#

tong2节点配置文件:

[root@tong2 ~]# vim /etc/my.cnf

basedir = /usr/local/mysql-5.6.23
datadir = /usr/local/mysql-5.6.23/data
port = 3306
server_id = 10
socket = /tmp/mysql.sock

replicate-do-db=tong
replicate-ignore-db=mysql

log-bin=mysql-bin
log-bin-index=mysql-bin-index

auto_increment_offset=2
auto_increment_increment=2

relay-log=relay-log
relay-log-index=relay-log-index

log_slave_updates
sync-binlog=1

[root@tong2 ~]#

tong3节点配置文件:

[root@tong3 ~]# vim /etc/my.cnf

basedir = /usr/local/mysql-5.6.23
datadir = /usr/local/mysql-5.6.23/data
port = 3306
server_id = 30
socket = /tmp/mysql.sock

replicate-do-db=tong
replicate-ignore-db=mysql

[root@tong3 ~]#

配置主主模式:

tong1节点:

[root@tong1 ~]# /etc/init.d/mysqld restart
Shutting down MySQL.... SUCCESS!
Starting MySQL. SUCCESS!
[root@tong1 ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.23-log MySQL Community Server (GPL)

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> grant replication slave,replication client on *.* to repl_user@'192.168.1.%' identified by 'system!#%246';         --创建复制用户

Query OK, 0 rows affected (0.00 sec)

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      120 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

mysql> 

tong2节点:

[root@tong2 ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.23-log MySQL Community Server (GPL)

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> grant replication slave,replication client on *.* to repl_user@'192.168.1.%' identified by 'system!#%246';

Query OK, 0 rows affected (0.00 sec)

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      120 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

mysql> change master to master_host='192.168.1.247',master_port=3306,master_user='repl_user',master_password='system!#%246',master_log_file='mysql-bin.000001',master_log_pos=120;    --复制tong1中的数据
Query OK, 0 rows affected, 2 warnings (0.50 sec)

mysql> start slave;                 --开启从服务
Query OK, 0 rows affected (0.05 sec)

mysql>

tong1节点:

mysql>  change master to master_host='192.168.1.248',master_port=3306,master_user='repl_user',master_password='system!#%246',master_log_file='mysql-bin.000001',master_log_pos=120;   --复制tong2中的数据
Query OK, 0 rows affected, 2 warnings (0.22 sec)

mysql> start slave;
Query OK, 0 rows affected (0.05 sec)

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.248
                  Master_User: repl_user
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 120
               Relay_Log_File: relay-log.000002
                Relay_Log_Pos: 283
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes            --主主同步成功
            Slave_SQL_Running: Yes
              Replicate_Do_DB: tong
          Replicate_Ignore_DB: mysql
           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: 120
              Relay_Log_Space: 450
              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:
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 10
                  Master_UUID: de5d22d1-ed4b-11e4-9390-1078d2c717e8
             Master_Info_File: /usr/local/mysql-5.6.23/data/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           Master_Retry_Count: 86400
                  Master_Bind:
      Last_IO_Error_Timestamp:
     Last_SQL_Error_Timestamp:
               Master_SSL_Crl:
           Master_SSL_Crlpath:
           Retrieved_Gtid_Set:
            Executed_Gtid_Set:
                Auto_Position: 0
1 row in set (0.00 sec)

mysql> 

5.测试主主架构是否生效

tong1节点:

mysql> create table a(a int);
Query OK, 0 rows affected (0.39 sec)

mysql> insert into a values(1);
Query OK, 1 row affected (0.03 sec)

mysql> select * from a;
+------+
| a    |
+------+
|    1 |
+------+
1 row in set (0.00 sec)

mysql>

tong2节点:

mysql> \u tong
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> select * from a;
+------+
| a    |
+------+
|    1 |
+------+
1 row in set (0.00 sec)

mysql> insert into a values(2);
Query OK, 1 row affected (0.03 sec)

mysql> select * from a;
+------+
| a    |
+------+
|    1 |
|    2 |
+------+
2 rows in set (0.00 sec)

mysql>

6.将tong3设置成tong1节点的从机

[root@tong3 ~]# /etc/init.d/mysqld  restart

Shutting down MySQL.. SUCCESS!
Starting MySQL. SUCCESS!
[root@tong3 ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 16
Server version: 5.6.23 MySQL Community Server (GPL)

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> change master to master_host='192.168.1.247',master_port=3306,master_user='repl_user',master_password='system!#%246',master_log_file='mysql-bin.000001',master_log_pos=120;    --复制tong1中的数据
Query OK, 0 rows affected, 2 warnings (0.27 sec)

mysql> start slave;
Query OK, 0 rows affected (0.07 sec)

mysql> \u tong
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> select * from a;    --数据已同步
+------+
| a    |
+------+
|    1 |
|    2 |
+------+
2 rows in set (0.00 sec)

mysql>

7.在三个数据库节点分别创建监控用户和代理用户

mysql> grant replication client on *.* to 'mmm_moniton'@'192.168.1.%' identified by 'moniton';
Query OK, 0 rows affected (0.00 sec)

mysql>  grant super,replication client,process on *.* to 'mmm_agent'@'192.168.1.%' identified by 'agent';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> 

8.在监控节点修改配置文件

[root@tong3 ~]# cd /etc/mysql-mmm/
[root@tong3 mysql-mmm]# ll
total 16
-rw-r-----. 1 root root   33 Apr 29 14:06 mmm_agent.conf
-rw-r-----. 1 root root  684 Apr 29 14:06 mmm_common.conf
-rw-r-----. 1 root root  321 Apr 29 14:06 mmm_mon.conf
-rw-r-----. 1 root root 1293 Apr 29 14:06 mmm_tools.conf
[root@tong3 mysql-mmm]# vim mmm_common.conf 

active_master_role      writer



        cluster_interface              eth0    --心跳网卡接口

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

        replication_user               repl_user        --复制用户名和密码
        replication_password           system!#%246    

        agent_user                      mmm_agent       --代理用户名和密码
        agent_password                  agent


    --主机名
        ip                              192.168.1.247    --tong1的IP地址
        mode                            master           --主模式
        peer                            tong1            --主机名



        ip                              192.168.1.248
        mode                            master
        peer                            tong2



        ip                              192.168.1.249
        mode                            slave         --从服务器




        hosts                           tong1, tong2     --tong1和tong2可写
        ips                             192.168.1.120
        mode                            exclusive



        hosts                           tong1, tong2, tong3   --三台可读
        ips                             192.168.1.121
        mode                            balanced

[root@tong3 mysql-mmm]# vim 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
        ping_ips                                192.168.1.247, 192.168.1.248, 192.168.1.249
        auto_set_online                         10



        monitor_user                    mmm_moniton    --监控用户名和密码
        monitor_password                moniton


debug 1               --为1是开启服务打印日志,为0是只开启服务

[root@tong3 mysql-mmm]# cat mmm_agent.conf
include mmm_common.conf
this tong3                        --主机名
[root@tong3 mysql-mmm]#

9.将tong3节点的mmm_common.conf复制到tong1和tong2节点中

[root@tong3 mysql-mmm]# scp mmm_common.conf tong1:/etc/mysql-mmm/
mmm_common.conf                              100%  674     0.7KB/s   00:00    
You have mail in /var/spool/mail/root
[root@tong3 mysql-mmm]# scp mmm_common.conf tong2:/etc/mysql-mmm/
mmm_common.conf                              100%  674     0.7KB/s   00:00    
[root@tong3 mysql-mmm]# 

tong1,tong2修改mmm_agent.conf文件并启动服务

[root@tong1 mysql-mmm]# cat mmm_agent.conf
include mmm_common.conf
this tong1                        --修改主机名
[root@tong1 mysql-mmm]# /etc/init.d/mysql-mmm-agent restart    --重启服务
Daemon bin: '/usr/sbin/mmm_agentd'
Daemon pid: '/var/run/mmm_agentd.pid'
Daemon bin: '/usr/sbin/mmm_agentd'
Daemon pid: '/var/run/mmm_agentd.pid'
Shutting down MMM Agent daemon. Ok
Daemon bin: '/usr/sbin/mmm_agentd'
Daemon pid: '/var/run/mmm_agentd.pid'
Starting MMM Agent daemon... Ok
[root@tong1 mysql-mmm]# 

tong3启动mmm-mysql-agent和mysql-mmm-monitor服务

[root@tong3 mysql-mmm]# /etc/init.d/mysql-mmm-agent  restart
Daemon bin: '/usr/sbin/mmm_agentd'
Daemon pid: '/var/run/mmm_agentd.pid'
Daemon bin: '/usr/sbin/mmm_agentd'
Daemon pid: '/var/run/mmm_agentd.pid'
Shutting down MMM Agent daemon. Ok
Daemon bin: '/usr/sbin/mmm_agentd'
Daemon pid: '/var/run/mmm_agentd.pid'
Starting MMM Agent daemon... Ok
[root@tong3 mysql-mmm]# /etc/init.d/mysql-mmm-monitor  restart
Daemon bin: '/usr/sbin/mmm_mond'
Daemon pid: '/var/run/mmm_mond.pid'
Daemon bin: '/usr/sbin/mmm_mond'
Daemon pid: '/var/run/mmm_mond.pid'
Shutting down MMM Monitor daemon:  not running.
Daemon bin: '/usr/sbin/mmm_mond'
Daemon pid: '/var/run/mmm_mond.pid'
Starting MMM Monitor daemon: Ok
[root@tong3 mysql-mmm]# mmm_control  show
  tong1(192.168.1.247) master/ONLINE. Roles: writer(192.168.1.120)
  tong2(192.168.1.248) master/ONLINE. Roles:
  tong3(192.168.1.249) slave/ONLINE. Roles: reader(192.168.1.121)

[root@tong3 mysql-mmm]# mmm_control  set_offline tong1
OK: State of 'tong1' changed to ADMIN_OFFLINE. Now you can wait some time and check all roles!
[root@tong3 mysql-mmm]# mmm_control  show
  tong1(192.168.1.247) master/ADMIN_OFFLINE. Roles:
  tong2(192.168.1.248) master/ONLINE. Roles: writer(192.168.1.120)
  tong3(192.168.1.249) slave/ONLINE. Roles: reader(192.168.1.121)

[root@tong3 mysql-mmm]# mmm_control  set_offline tong3
OK: State of 'tong3' changed to ADMIN_OFFLINE. Now you can wait some time and check all roles!
[root@tong3 mysql-mmm]# mmm_control  show
  tong1(192.168.1.247) master/ADMIN_OFFLINE. Roles:
  tong2(192.168.1.248) master/ONLINE. Roles: reader(192.168.1.121), writer(192.168.1.120)
  tong3(192.168.1.249) slave/ADMIN_OFFLINE. Roles:

[root@tong3 mysql-mmm]# mmm_control  set_online tong1
OK: State of 'tong1' changed to ONLINE. Now you can wait some time and check its new roles!
[root@tong3 mysql-mmm]# mmm_control  set_online tong3
OK: State of 'tong3' changed to ONLINE. Now you can wait some time and check its new roles!
[root@tong3 mysql-mmm]# mmm_control  show
  tong1(192.168.1.247) master/ONLINE. Roles: reader(192.168.1.121)
  tong2(192.168.1.248) master/ONLINE. Roles: writer(192.168.1.120)
  tong3(192.168.1.249) slave/ONLINE. Roles:

You have mail in /var/spool/mail/root
[root@tong3 mysql-mmm]