二十、02-搭建mysql服务器，并实现主主复制

搭建mysql服务器，并实现主主复制(互为主从)

1、环境配置

主机名	IP	角色
node01	192.168.85.128	mysql-master
node02	192.168.85.129	mysql-master

2、安装mariadb-server

node01# yum install -y mariadb-server
node02# yum install -y mariadb-server

3、node01修改配置文件，启动服务

node01# vim /etc/my.cnf.d/server.cnf
[mysqld]
innodb_file_per_table=ON
skip_name_resolve=ON
server_id=1
log-bin=master-log
relay_log=relay-log
auto_increment_offset=1
auto_increment_increment=2


node01#  systemctl start mariadb-server
node01# systemctl  enable mariadb-server 

node01# mysql_secure_installation (初始化数据库)

4、node01mysql数据库配置复制用户权限

[root@node01 ~]# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
[root@node01 ~]# mysql
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 6
Server version: 5.5.60-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> grant replication client,replication slave on *.* to 'repluser'@'192.168.85.%' identified by 'replpass';
MariaDB [(none)]> show master status ;
+-------------------+----------+--------------+------------------+
| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+-------------------+----------+--------------+------------------+
| master-log.000004 |      245 |              |                  |
+-------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

5、node02修改配置文件，启动服务

node02# vim /etc/my.cnf.d/server.cnf
innodb_file_per_table=ON
skip_name_resolve=ON

server_id=7
log-bin=master-log
relay_log=relay-log

auto_increment_offset=2
auto_increment_increment=2


node02#  systemctl start mariadb-server
node02# systemctl  enable mariadb-server 

node02# mysql_secure_installation (初始化数据库)

6、node02mysql数据库配置复制用户权限

[root@node02 ~]# mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
[root@node01 ~]# mysql
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 6
Server version: 5.5.60-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> grant replication client,replication slave on *.* to 'repluser'@'192.168.85.%' identified by 'replpass';
MariaDB [(none)]> show master status ;
+-------------------+----------+--------------+------------------+
| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+-------------------+----------+--------------+------------------+
| master-log.000004 |      245 |              |                  |
+-------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

7、分别在node01和node02的主机配置

配置node01为node02的从

MariaDB [(none)]> CHANGE MASTER TO MASTER_HOST='192.168.85.129',MASTER_USER='repluser',MASTER_PASSWORD='replpass',MASTER_PORT=3306,MASTER_LOG_FILE='master-log.000004',MASTER_LOG_POS=245;
MariaDB [(none)]> start slave;
MariaDB [(none)]> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.85.129
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-log.000004
          Read_Master_Log_Pos: 245
               Relay_Log_File: relay-log.000005
                Relay_Log_Pos: 530
        Relay_Master_Log_File: master-log.000004
             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: 245
              Relay_Log_Space: 1103
              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: 7
1 row in set (0.00 sec)
ERROR: No query specified

配置node02为node01的从

MariaDB [(none)]>  CHANGE MASTER TO MASTER_HOST='192.168.85.128',MASTER_USER='repluser',MASTER_PASSWORD='replpass',MASTER_PORT=3306,MASTER_LOG_FILE='master-log.000004',MASTER_LOG_POS=245;
MariaDB [(none)]> start slave;
MariaDB [(none)]> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.85.128
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-log.000004
          Read_Master_Log_Pos: 245
               Relay_Log_File: relay-log.000005
                Relay_Log_Pos: 530
        Relay_Master_Log_File: master-log.000004
             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: 245
              Relay_Log_Space: 1103
              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
1 row in set (0.00 sec)
ERROR: No query specified

到此，数据库的主主复制就搭建完毕了，验证请自行验证