mysql 主从复制之两台mysql数据之间实现主从复制
1.前提
1.假设你已经在两台不同的linux服务器上已经成功的分别安装了一台mysql服务
2.如果没有安装成功,可以参考下面的mysql在linux上的安装地址
安装地址
mysql 安装之linux环境安装mysql-通过jar包安装配置
https://blog.csdn.net/u014636209/article/details/83039504
mysql 安装之linux环境命令安装mysql
https://blog.csdn.net/u014636209/article/details/82559376
2.目标
1.主数据库中的数据变更,同步到从数据库中
3.主从复制配置步骤
3.1.概念自定义
1.主数据库所在服务器:192.168.184.136 我们定义为A
2.从数据库所在服务器:192.168.184.135 我们定义为B
3.1.分别修改主从数据库的服务server-id
3.1.1.主数据库server-id修改
[root@izwz91h49n3mj8r232gqwez ~]# vim /etc/my.cnf
# For advice on how to change settings please see
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
[mysqld]
log-bin=mysql-bin
server-id=
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
#skip-grant-tables
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[mysqld_safe]
log-error=/var/log/mysqld.log
备注:
写入内容如下
log-bin=mysql-bin #[必须]启用二进制日志
server-id=135 #[必须]服务器唯一ID，默认是1，一般取IP最后一段
重启mysql服务
[root@izwz91h49n3mj8r232gqwez weblogic]# service mysqld restart
Redirecting to /bin/systemctl restart mysqld.service
3.1.2.从数据库server-id修改
从数据库的配置如上,只不过server-id不一样
写入内容如下
log-bin=mysql-bin #[必须]启用二进制日志
server-id=136 #[必须]服务器唯一ID，默认是1，一般取IP最后一段
重启mysql服务
[root@izwz91h49n3mj8r232gqwez weblogic]# service mysqld restart
Redirecting to /bin/systemctl restart mysqld.service
3.2.在主服务器A上建立帐户并授权slave
3.2.1.主服务器A-linux上首先登陆mysql服务器
[root@izwz91h49n3mj8r232gqwez weblogic]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.41-log MySQL Community Server (GPL)
Copyright (c) 2000, 2018, 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>
3.2.2.授权slave(授权从服务器可以进行远程连接同步)
mysql> GRANT REPLICATION SLAVE ON *.* to 'sync'@'192.168.184.136' identified by 'sync';
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 | 330 | | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
说明
1.GRANT REPLICATION SLAVE ON *.* to 'sync'@'192.168.184.136' identified by 'sync';
这里的192.168.184.135是可以允许的远程复制的从服务器的ip
第一个sync为远程连接的账户,第二个sync为远程连接的密码,
当然你可以自定义其他的账户名或密码
2.show master status;#查看主数据的状态
File :mysql-bin.000001 会记录所有的主数据库更新的sql
结果中的Position:300 为开始复制的位置 ,
注：执行完此步骤后不要再操作主服务器MYSQL，防止主服务器状态值变化,
因为,你执行了跟新操作后,这个值会变化
3.3.配置从数据库(配置Salve)
3.3.1.从服务器B-linux上首先登陆mysql服务器
略
3.3.2.mysql命令配置
mysql> change master to master_host='192.168.184.135',master_user='sync',master_password='sync',
-> master_log_file='mysql-bin.000001',master_log_pos=330;
Query OK, 0 rows affected, 2 warnings (0.01 sec)
备注
1.master_host上一个步骤配置的主数据库的ip
2.master_user 上面允许的账户名
3.master_password 上面允许的账户名对应的密码
4.master_log_file='mysql-bin.000001' 上面主数据库记录更新sql的文件名
5.master_log_pos=330; 上面主数据库更新sql记录的最后的位置(开始同步的位置)
查看从数据库的配置的状态
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Connecting to master
Master_Host: 192.168.145.222
Master_User: sync
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 330
Relay_Log_File: izwz97qxc2ue9zskj6lhwpz-relay-bin.000001
Relay_Log_Pos: 4
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Connecting
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: 330
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: /usr/local/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)
3.3.3.从服务器启动复制
mysql> START SLAVE;
Query OK, 0 rows affected (0.00 sec)
至此,在主数据库(A)里进行的数据更新,都会同步到从数据库里面(B)
3.4.进行数据测试
主数据库里执行下面命令
mysql> create database test
-> ;
Query OK, 1 row affected (0.00 sec)
mysql>
从数据库查看是否已经创建成功
mysql> show databases
-> ;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| test | //已经有了
+--------------------+
5 rows in set (0.00 sec)
mysql>