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[经验分享] centos7 mysql互为主从+keepalived

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YunVN网友  发表于 2019-4-18 13:50:05 |阅读模式
  一、互为主从配置

  1.1、资源情况
  192.168.11.177 server1
  192.168.11.180 server2
  192.168.11.210 VIP
  1.2、server1配置
  # vi /etc/my.cnf
  [mysqld]
  server-id=1
  log-bin=mysql-bin
  relay_log=mysql-realy-bin
  relay_log_index=slave-mysql-realy-bin.index
  expire_logs_days=15
  binlog_format=mixed
  auto-increment-increment=2
  auto-increment-offset= 1
  innodb_flush_log_at_trx_commit=1
  replicate-ignore-db=sys
  replicate-ignore-db=mysql
  replicate-ignore-db=information_schema
  replicate-ignore-db=performance_schema
  datadir=/data/mysql_data
  socket=/var/lib/mysql/mysql.sock
  character_set_server=utf8
  sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'
  # Disabling symbolic-links is recommended to prevent assorted security risks
  symbolic-links=0
  log-error=/var/log/mysqld.log
  pid-file=/var/run/mysqld/mysqld.pid
  # innodb optimization
  innodb_buffer_pool_size=8G
  innodb_log_file_size=256M
  innodb_flush_method=O_DIRECT
  max_connections=500
  innodb_autoextend_increment=128
  1.3、server2配置
  # vi /etc/my.cnf
  server-id=2
  log-bin=mysql-bin
  relay_log=mysql-realy-bin
  relay_log_index=slave-realy-bin.index
  expire_logs_days=15
  binlog_format=mixed
  auto-increment-increment=2
  auto-increment-offset= 2
  innodb_flush_log_at_trx_commit=1
  replicate-ignore-db=sys
  replicate-ignore-db=mysql
  replicate-ignore-db=information_schema
  replicate-ignore-db=performance_schema
  datadir=/data/mysql_data
  socket=/var/lib/mysql/mysql.sock
  character_set_server=utf8
  sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'
  # Disabling symbolic-links is recommended to prevent assorted security risks
  symbolic-links=0
  log-error=/var/log/mysqld.log
  pid-file=/var/run/mysqld/mysqld.pid
  # innodb optimization
  innodb_buffer_pool_size=8G
  innodb_log_file_size=256M
  innodb_flush_method=O_DIRECT
  max_connections=500
  innodb_autoextend_increment=128
  1.4、server1、server2上修改账户密码,创建同步账户

  # mysql -p
  mysql> set password=password('******');
  mysql> create user repluser@'%' identified by '******';
  mysql> grant replication slave, replication client on *.* to repluser@'%';
  1.5、server2建立同步
  server1的master状态
  mysql> show master status;
  +------------------+----------+--------------+------------------+-------------------+
  | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
  +------------------+----------+--------------+------------------+-------------------+
  | mysql-bin.000003 |      882 |              |                  |                   |
  +------------------+----------+--------------+------------------+-------------------+
  mysql> CHANGE MASTER TO MASTER_HOST='192.168.11.177', MASTER_USER='repluser', MASTER_PASSWORD='******', MASTER_LOG_FILE='mysql-bin.000003', MASTER_LOG_POS=882;
  Query OK, 0 rows affected, 2 warnings (0.10 sec)
  mysql> show slave status\G
  *************************** 1. row ***************************
  Slave_IO_State:
  Master_Host: 192.168.11.177
  Master_User: repluser
  Master_Port: 3306
  Connect_Retry: 60
  Master_Log_File: mysql-bin.000003
  Read_Master_Log_Pos: 882
  Relay_Log_File: mysql-realy-bin.000001
  Relay_Log_Pos: 4
  Relay_Master_Log_File: mysql-bin.000003
  Slave_IO_Running: No
  Slave_SQL_Running: No
  Replicate_Do_DB:
  Replicate_Ignore_DB: sys,mysql,information_schema,performance_schema
  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: 882
  Relay_Log_Space: 154
  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: NULL
  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: 0
  Master_UUID:
  Master_Info_File: /data/mysql_data/master.info
  SQL_Delay: 0
  SQL_Remaining_Delay: NULL
  Slave_SQL_Running_State:
  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
  Replicate_Rewrite_DB:
  Channel_Name:
  Master_TLS_Version:
  1 row in set (0.00 sec)
  # vi /data/mysql_data/auto.cnf
  [auto]
  server-uuid=cbcefb67-9f9a-11e8-91b3-06ba24001d86
  >
  server-uuid=cbcefb77-9f9a-11e8-91b3-06ba24001d86
  mysql> show slave status\G
  *************************** 1. row ***************************
  Slave_IO_State: Waiting for master to send event
  Master_Host: 192.168.11.177
  Master_User: repluser
  Master_Port: 3306
  Connect_Retry: 60
  Master_Log_File: mysql-bin.000003
  Read_Master_Log_Pos: 882
  Relay_Log_File: mysql-realy-bin.000003
  Relay_Log_Pos: 320
  Relay_Master_Log_File: mysql-bin.000003
  Slave_IO_Running: Yes
  Slave_SQL_Running: Yes
  Replicate_Do_DB:
  Replicate_Ignore_DB: sys,mysql,information_schema,performance_schema
  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: 882
  Relay_Log_Space: 527
  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: 1
  Master_UUID: cd146946-9f95-11e8-9a29-063696001d83
  Master_Info_File: /data/mysql_data/master.info
  SQL_Delay: 0
  SQL_Remaining_Delay: NULL
  Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
  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
  Replicate_Rewrite_DB:
  Channel_Name:
  Master_TLS_Version:
  1 row in set (0.00 sec)
  mysql> start slave;
  mysql> show master status;
  +------------------+----------+--------------+------------------+-------------------+
  | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
  +------------------+----------+--------------+------------------+-------------------+
  | mysql-bin.000003 |      154 |              |                  |                   |
  +------------------+----------+--------------+------------------+-------------------+
  1.6、server1建立同步

  mysql> CHANGE MASTER TO MASTER_HOST='192.168.11.180', MASTER_USER='repluser', MASTER_PASSWORD='******', MASTER_LOG_FILE='mysql-bin.000003', MASTER_LOG_POS=154;
  Query OK, 0 rows affected, 2 warnings (0.22 sec)
  mysql> start slave;
  Query OK, 0 rows affected (0.01 sec)
  mysql> show slave status\G
  *************************** 1. row ***************************
  Slave_IO_State: Waiting for master to send event
  Master_Host: 192.168.11.180
  Master_User: repluser
  Master_Port: 3306
  Connect_Retry: 60
  Master_Log_File: mysql-bin.000003
  Read_Master_Log_Pos: 154
  Relay_Log_File: mysql-realy-bin.000002
  Relay_Log_Pos: 320
  Relay_Master_Log_File: mysql-bin.000003
  Slave_IO_Running: Yes
  Slave_SQL_Running: Yes
  Replicate_Do_DB:
  Replicate_Ignore_DB: sys,mysql,information_schema,performance_schema
  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: 154
  Relay_Log_Space: 527
  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: 2
  Master_UUID: cbcefb67-9f9a-11e8-91b3-06ba24001d86
  Master_Info_File: /data/mysql_data/master.info
  SQL_Delay: 0
  SQL_Remaining_Delay: NULL
  Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
  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
  Replicate_Rewrite_DB:
  Channel_Name:
  Master_TLS_Version:
  1 row in set (0.00 sec)
  mysql> create database ceshi_db;
  Query OK, 1 row affected (0.01 sec)
  mysql> use ceshi_db1;
  Database changed
  mysql> create table home(id int(10) not null,name char(10));
  Query OK, 0 rows affected (0.14 sec)
  1.7、server2验证
  mysql> show databases;
  +--------------------+
  | Database           |
  +--------------------+
  | information_schema |
  | ceshi_db           |
  | mysql              |
  | performance_schema |
  | sys                |
  +--------------------+
  5 rows in set (0.00 sec)
  mysql> use ceshi_db;
  Database changed
  mysql> show tables;
  +--------------------+
  | Tables_in_ceshi_db |
  +--------------------+
  | home               |
  +--------------------+
  1 row in set (0.00 sec)
  mysql> create database ceshi_db1;
  Query OK, 1 row affected (0.01 sec)
  mysql> create table home(id int(10) not null,name char(10));^C
  mysql> use ceshi_db1;
  Database changed
  mysql> create table home(id int(10) not null,name char(10));
  Query OK, 0 rows affected (0.09 sec)
  1.8、server1验证
  mysql> show databases;
  +--------------------+
  | Database           |
  +--------------------+
  | information_schema |
  | ceshi_db           |
  | ceshi_db1          |
  | mysql              |
  | performance_schema |
  | sys                |
  +--------------------+
  6 rows in set (0.00 sec)
  mysql> use ceshi_db1;
  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> show tables;
  +---------------------+
  | Tables_in_ceshi_db1 |
  +---------------------+
  | home                |
  +---------------------+
  1 row in set (0.00 sec)
  二、keepalived配置
  2.1、server1配置

  # cat /etc/keepalived/keepalived.conf
  global_defs {
  smtp_server 127.0.0.1
  smtp_connect_timeout 30
  router_id mysql-1
  }
  vrrp_script chk_mysql {
  script "/etc/keepalived/scripts/mysql_check.sh"
  interval 2
  weight -5
  fall 2
  rise 1
  }
  vrrp_instance VI_1 {
  state MASTER
  interface eth0
  virtual_router_id 61
  priority 100
  advert_int 1
  authentication {
  auth_type PASS
  auth_pass 1111
  }
  track_script {
  chk_mysql
  }
  virtual_ipaddress {
  182.168.11.210
  }
  }
  2.2、server2配置
  # cat /etc/keepalived/keepalived.conf
  global_defs {
  smtp_server 127.0.0.1
  smtp_connect_timeout 30
  router_id mysql-2
  }
  vrrp_script chk_mysql {
  script "/etc/keepalived/scripts/mysql_check.sh"
  interval 2
  weight -5
  fall 2
  rise 1
  }
  vrrp_instance VI_1 {
  state BACKUP
  interface eth0
  virtual_router_id 61
  priority 99
  advert_int 1
  authentication {
  auth_type PASS
  auth_pass 1111
  }
  track_script {
  chk_mysql
  }
  virtual_ipaddress {
  182.168.11.210
  }
  }
  2.3、脚本

  # cat /etc/keepalived/scripts/mysql_check.sh
  #!/bin/bash
  counter=$(netstat -na|grep "LISTEN"|grep "3306"|wc -l)
  if [ "${counter}" -eq 0 ]; then
  service keepalived stop
  fi
  2.4、不抢占模式
  如果把server1设置为VIP不抢占模式,做下面修改
  server1
  # vi /etc/keepalived/keepalived.conf
  添加
  nopreempt
  state MASTER
  >
  state BACKUP
  #防止切换到从库后,主keepalived恢复后自动切换回主库
  参考:
  https://blog.csdn.net/qq_36276335/article/details/69942101
https://www.cnblogs.com/kevingrace/p/6710136.html



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