MYSQL主从环境搭建

服务器：

192.168.11.131 master

192.168.11.132 slave

服务器系统

# cat /etc/redhat-release 

CentOS Linux release 7.2.1511 (Core) 

1、下面安装过程两个节点操作相同

# rpm -qa | grep mariadb

postfix-2.10.1-6.el7.x86_64

# rpm -qa | grep mariadb

mariadb-libs-5.5.44-2.el7.centos.x86_64

# rpm -ev postfix-2.10.1-6.el7.x86_64

# rpm -ev mariadb-libs-5.5.44-2.el7.centos.x86_64

# rpm -ivh mysql-community-common-5.7.18-1.el7.x86_64.rpm 

# rpm -ivh mysql-community-libs-5.7.18-1.el7.x86_64.rpm 

# rpm -ivh mysql-community-client-5.7.18-1.el7.x86_64.rpm 

# rpm -ivh mysql-community-server-5.7.18-1.el7.x86_64.rpm 

设置开机启动

# systemctl enable mysqld.service

2、两节点配置

创建目录

# mkdir /data/mysql_data

# chown -R mysql:mysql /data/mysql_data

编辑配置文件

# vi /etc/my.cnf

datadir=/data/mysql_data

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'

# innodb optimization

innodb_buffer_pool_size=8G

innodb_log_file_size=256M

innodb_flush_method=O_DIRECT

max_connections=500

innodb_autoextend_increment=128

启动服务

# service mysqld start

主节点密码

# cat /var/log/mysqld.log 

A temporary password is generated for root@localhost: l+7jtY6QEfut

从节点密码

# cat /var/log/mysqld.log 

A temporary password is generated for root@localhost: sLxt;f?671RO

mysql> set password=password('Password123!');

密码随意设置（符合规则就行）

关闭服务

# service mysqld stop

3、主节点配置

# vi /etc/my.cnf

server-id=1

log-bin=mysql-bin

binlog_format=mixed

innodb_flush_log_at_trx_commit=1

sync_binlog=1

expire_logs_days=15

relay_log=mysql-realy-bin

4、从节点配置

# vi /etc/my.cnf

server-id=2

log_bin=mysql-bin

relay_log=mysql-relay-bin

log-slave-updates=on

expire_logs_days=15

replicate-ignore-db=sys

replicate-ignore-db=mysql

replicate-ignore-db=information_schema

replicate-ignore-db=performance_schema

启动服务

# service mysqld start

5、主节点配置同步

mysql> create user repluser@'%' identified by 'Password123!';

Query OK, 0 rows affected (0.00 sec)

mysql> grant replication slave, replication client on *.* to repluser@'%';

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.01 sec)

mysql> show master status;

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

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysql-bin.000001 |     2165 |              |                  |                   |

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

6、从节点配置同步

mysql> CHANGE MASTER TO MASTER_HOST='192.168.11.131', MASTER_USER='repluser', MASTER_PASSWORD='Password123!', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=2165;

Query OK, 0 rows affected, 2 warnings (0.00 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: 192.168.11.131

                  Master_User: repluser

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000001

          Read_Master_Log_Pos: 2165

               Relay_Log_File: mysql-relay-bin.000002

                Relay_Log_Pos: 320

        Relay_Master_Log_File: mysql-bin.000001

             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: 2165

              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: ce43b0d9-7f3e-11e8-abc5-063f580099bf

             Master_Info_File: /var/lib/mysql/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)

误给用户赋予了权限，故删除用户   

mysql> drop user missingcust@'%';

7、两节点验证

主节点配置验证：

mysql> create database ceshi_db;

Query OK, 1 row affected (0.00 sec)

mysql> use ceshi_db;

Database changed

mysql> create table home(id int(10) not null,name char(10));

Query OK, 0 rows affected (0.02 sec)

从节点验证;

mysql> show databases;

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

| Database           |

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

| information_schema |

| ceshi_db           |

| mysql              |

| performance_schema |

| sys                |

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

5 rows in set (0.00 sec)

mysql> use ceshi_db;

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_db |

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

| home               |

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

1 row in set (0.00 sec)