修改 /etc/hosts文件
ip地址 master1 ip地址 master2 ip地址 slave1 ip地址 slave2 一主一从 create database master1db; create table master1db.master1tab(name char(50)); insert into master1db.master1tab VALUES(1111); insert into master1db.master1tab VALUES(2222);master1 日志
[root@localhost opt]# vim /etc/my.cnf [root@localhost opt]# cat /etc/my.cnf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid log_bin server-id=1 systemctl restart mysqld创建用户
create user 'rep'@'192.168.18.%' identified by '123321zk'; grant replication slave,replication client on *.* to 'rep'@'192.168.18.%'; alter user 'rep'@'192.168.18.%' identified with mysql_native_password by '123321zk';master1上备份数据库
[root@localhost opt]# mysqldump -uroot -p'123321zk' --all-databases --single-transaction --master-data=2 --flush-logs > `date +%F`-mysql-all.sql [root@localhost opt]# ls 2023-10-12 mysql-community-common-8.0.25-1.el7.x86_64.rpm 2023-10-12-mysql-all.sql mysql-community-libs-8.0.25-1.el7.x86_64.rpm mysql-community-client-8.0.25-1.el7.x86_64.rpm mysql-community-server-8.0.25-1.el7.x86_64.rpm mysql-community-client-plugins-8.0.25-1.el7.x86_64.rpm rh从机master2登录
[root@localhost opt]# mysql -urep -p'123321zk' -h master1; mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 16 Server version: 8.0.25 MySQL Community Server - GPL Copyright (c) 2000, 2021, Oracle and/or its affiliates. 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>修改master2的配置文件
[root@localhost opt]# vim /etc/my.cnf [root@localhost opt]# cat /etc/my.cnf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid server-id=2 systemctl restart mysqldmaster2用root登录
[root@localhost opt]# mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 8 Server version: 8.0.25 MySQL Community Server - GPL Copyright (c) 2000, 2021, Oracle and/or its affiliates. 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>手动同步数据
复制master1的sql文件到matser2上
[root@localhost opt]# scp 2023-10-12-mysql-all.sql master2:/opt The authenticity of host 'master2 (192.168.18.131)' can't be established. ECDSA key fingerprint is 83:bc:ac:37:44:8d:ea:4f:c7:c5:f7:2b:c5:0c:ee:b4. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'master2,192.168.18.131' (ECDSA) to the list of known hosts. root@master2's password: 2023-10-12-mysql-all.sql 100% 1190KB 1.2MB/s 00:00 [root@localhost opt]#master2查看
[root@localhost opt]# ls 2023-10-12-mysql-all.sql mysql-community-common-8.0.25-1.el7.x86_64.rpm rh mysql-community-client-8.0.25-1.el7.x86_64.rpm mysql-community-libs-8.0.25-1.el7.x86_64.rpm mysql-community-client-plugins-8.0.25-1.el7.x86_64.rpm mysql-community-server-8.0.25-1.el7.x86_64.rpmmaster2上root用户执行
mysql> source /opt/2023-10-12-mysql-all.sql; Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.00 sec) Query OK, 0 rows affected (0.00 sec) ..... # 查询成功！ mysql> select * from master1db.master1tab; +------+ | name | +------+ | 1111 | | 2222 | +------+ 2 rows in set (0.00 sec)配置日志偏移量
mysql> change master to master_host='master1',master_user='rep',master_password='123321zk',master_log_file='localhost-bin.000002',master_log_pos=156; Query OK, 0 rows affected, 8 warnings (0.05 sec)启动从机master2
mysql> start slave; Query OK, 0 rows affected, 1 warning (0.00 sec)master1查看偏移量
mysql> show master status; +----------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +----------------------+----------+--------------+------------------+-------------------+ | localhost-bin.000002 | 448 | | | | +----------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec)master2更新偏移量
mysql> change master to master_host='master1',master_user='rep',master_password='123321zk',master_log_file='localhost-bin.000002',master_log_pos=448; Query OK, 0 rows affected, 8 warnings (0.05 sec) mysql> start slave; Query OK, 0 rows affected, 1 warning (0.12 sec) mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: master1 Master_User: rep Master_Port: 3306 Connect_Retry: 60 Master_Log_File: localhost-bin.000002 Read_Master_Log_Pos: 448 Relay_Log_File: localhost-relay-bin.000002 Relay_Log_Pos: 328 Relay_Master_Log_File: localhost-bin.000002 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: 448 Relay_Log_Space: 541 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: d4996f86-68fd-11ee-ae55-000c29980cea Master_Info_File: mysql.slave_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: Master_public_key_path: Get_master_public_key: 0 Network_Namespace: 1 row in set, 1 warning (0.00 sec) ERROR: No query specified mysql>双主双从修改master1的配置文件
[root@localhost ~]# vim /etc/my.cnf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid log-bin=/var/lib/mysql/binlog server-id=1 # 跳过不备份数据库 binlog-ignore-db=mysql binlog-ignore-db=information_schema # 数据库 binlog-do-db=mydb2 # 日志格式 binlog_format=statement # 过期时间 expire_logs_days=7 slave_skip_errors=1062 # 作为从数据库 写入操作也要更新二进制文件 log-slave-updates # 标识自增长字段每次递增的量 就是步长 auto-increment-increment=2 # 表示自增从哪个数开始 auto-increment-offset=1重启master1数据库
systemctl restart mysqld修改master2配置文件
[root@localhost ~]# cat /etc/my.cnf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid log-bin=/var/lib/mysql/binlog server-id=3 # 跳过不备份数据库 binlog-ignore-db=mysql binlog-ignore-db=information_schema # 数据库 binlog-do-db=mydb2 # 日志格式 binlog_format=statement # 过期时间 expire_logs_days=7 slave_skip_errors=1062 # 作为从数据库 写入操作也要更新二进制文件 log-slave-updates # 标识自增长字段每次递增的量 就是步长 auto-increment-increment=2 # 表示自增从哪个数开始 auto-increment-offset=2 systemctl restart mysqld更改slave1配置文件
[root@localhost ~]# cat /etc/my.cnf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid # 服务id server-id=2 # 启用中继日志 relay-log=mysql-relay更改slave2配置文件
[mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid # 服务id server-id=4 # 启用中继日志 relay-log=mysql-relay分别重启slave1和slave2
systemctl restart mysqldmaster1，master2配置 创建用户并授权 两个主数据库都要创
mysql> CREATE USER 'repl_user'@'%' IDENTIFIED WITH mysql_native_password BY '123321zk'; Query OK, 0 rows affected (0.01 sec) mysql> CREATE USER 'slave_sync_user'@'%' IDENTIFIED WITH mysql_native_password BY '123321zk'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT REPLICATION SLAVE ON *.* TO 'repl_user'@'%'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT REPLICATION SLAVE ON *.* TO 'slave_sync_user'@'%'; Query OK, 0 rows affected (0.01 sec)
查看master1的偏移量
mysql> show master status; +---------------+----------+--------------+--------------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +---------------+----------+--------------+--------------------------+-------------------+ | binlog.000003 | 1198 | mydb2 | mysql,information_schema | | +---------------+----------+--------------+--------------------------+-------------------+ 1 row in set (0.00 sec)修改slave1 配置主master1从关系
mysql> change master to master_host='master1',master_user='slave_sync_user',master_password='123321zk',master_log_file='binlog.000003',master_log_pos=1198; Query OK, 0 rows affected, 8 warnings (0.51 sec)启动slave1
mysql> start slave; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: master1 Master_User: slave_sync_user Master_Port: 3306 Connect_Retry: 60 Master_Log_File: binlog.000003 Read_Master_Log_Pos: 1198 Relay_Log_File: mysql-relay.000002 Relay_Log_Pos: 321 Relay_Master_Log_File: binlog.000003 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: 1198 Relay_Log_Space: 526 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: d4996f86-68fd-11ee-ae55-000c29980cea Master_Info_File: mysql.slave_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: Master_public_key_path: Get_master_public_key: 0 Network_Namespace: 1 row in set, 1 warning (0.00 sec) 主2从2主2msql 作为主服务器
从2mysql作为从服务器
查看master2状态
mysql> show master status; +---------------+----------+--------------+--------------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +---------------+----------+--------------+--------------------------+-------------------+ | binlog.000002 | 1654 | mydb2 | mysql,information_schema | | +---------------+----------+--------------+--------------------------+-------------------+ 1 row in set (0.00 sec)修改slave2 配置主master2从关系
mysql> change master to master_host='master2',master_user='slave_sync_user',master_password='123321zk',master_log_file='binlog.000002',master_log_pos=1654; Query OK, 0 rows affected, 8 warnings (0.51 sec)启动slave2
mysql> start slave; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: master2 Master_User: slave_sync_user Master_Port: 3306 Connect_Retry: 60 Master_Log_File: binlog.000002 Read_Master_Log_Pos: 1654 Relay_Log_File: mysql-relay.000002 Relay_Log_Pos: 321 Relay_Master_Log_File: binlog.000002 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: 1654 Relay_Log_Space: 526 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: 3 Master_UUID: d5b21ed3-68fd-11ee-b692-000c29dadb21 Master_Info_File: mysql.slave_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: Master_public_key_path: Get_master_public_key: 0 Network_Namespace: 1 row in set, 1 warning (0.01 sec) 主1主2修改master2 从master1
mysql> change master to master_host='master1',master_user='repl_user',master_password='123321zk',master_log_file='binlog.000003',master_log_pos=1198; Query OK, 0 rows affected, 8 warnings (0.73 sec) mysql> start slave; Query OK, 0 rows affected, 1 warning (0.02 sec) mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: master1 Master_User: repl_user Master_Port: 3306 Connect_Retry: 60 Master_Log_File: binlog.000003 Read_Master_Log_Pos: 1198 Relay_Log_File: localhost-relay-bin.000002 Relay_Log_Pos: 321 Relay_Master_Log_File: binlog.000003 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: 1198 Relay_Log_Space: 534 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: d4996f86-68fd-11ee-ae55-000c29980cea Master_Info_File: mysql.slave_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: Master_public_key_path: Get_master_public_key: 0 Network_Namespace: 1 row in set, 1 warning (0.00 sec) 主2主1修改master1 从master2
master2查看
mysql> show master status; +---------------+----------+--------------+--------------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +---------------+----------+--------------+--------------------------+-------------------+ | binlog.000002 | 1654 | mydb2 | mysql,information_schema | | +---------------+----------+--------------+--------------------------+-------------------+ 1 row in set (0.00 sec)修改master1 从master2
mysql> change master to master_host='master2',master_user='repl_user',master_password='123321zk',master_log_file='binlog.000002',master_log_pos=1654; Query OK, 0 rows affected, 8 warnings (0.12 sec) mysql> start slave; Query OK, 0 rows affected, 1 warning (0.01 sec) mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: master2 Master_User: repl_user Master_Port: 3306 Connect_Retry: 60 Master_Log_File: binlog.000002 Read_Master_Log_Pos: 1654 Relay_Log_File: localhost-relay-bin.000002 Relay_Log_Pos: 321 Relay_Master_Log_File: binlog.000002 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: 1654 Relay_Log_Space: 534 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: 3 Master_UUID: d5b21ed3-68fd-11ee-b692-000c29dadb21 Master_Info_File: mysql.slave_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: Master_public_key_path: Get_master_public_key: 0 Network_Namespace: 1 row in set, 1 warning (0.00 sec)在master1上创建数据库
CREATE DATABASE mydb2; CREATE TABLE mydb2.books ( id INT PRIMARY KEY auto_increment, name VARCHAR ( 50 )); INSERT INTO mydb2.books ( NAME ) VALUES ( 'test mysql' );查看其余数据库是否同步
全部同步成功
解决问题参考链接
主从同步报错Last_IO_Error: error connecting to master ‘use@192.XXXX‘ - retry-time: 60 retries: 86400解决办法。-CSDN博客
MySQL主从复制报错：Got fatal error 1236 from master when reading data from-CSDN博客
解决mysql8.0主从配置，从库连接报错：Authentication plugin ‘caching_sha2_password‘ reported error_authentication plugin’caching-CSDN博客