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[经验分享] mysql高可用方案之MMM

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发表于 2018-9-30 12:31:22 | 显示全部楼层 |阅读模式
  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>  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>  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.%'>  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>  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.%'>  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

  >
  >
  >  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

  >  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>  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>  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.%'>  Query OK, 0 rows affected (0.00 sec)

  mysql>  grant super,replication client,process on *.* to 'mmm_agent'@'192.168.1.%'>  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]


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