容器中mysql主从搭建：
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1、新建主服务器容器实例：端口为3307
2、进入/mydata/mysql-master/conf目录,创建my.cnf文件,并写入如下内容。docker run -p 3307:3306 --name=mysql-master \
-v /mydata/mysql-master/log:/var/log/mysql \
-v /mydata/mysql-master/data:/var/lib/mysql \
-v /mydata/mysql-master/conf:/etc/mysql \
-e MYSQL_ROOT_PASSWORD=blogtagggpw \
-d mysql:5.7
重启mysql-master容器。[mysqld]
## 设置server_id，同一局域网中需要唯一
server_id=101
## 指定不需要同步的数据库名称
binlog-ignore-db=mysql
## 开启二进制日志功能
log-bin=mall-mysql-bin
## 设置二进制日志使用内存大小（事务）
binlog_cache_size=1M
## 设置使用的二进制日志格式（mixed,statement,row）
binlog_format=mixed
## 二进制日志过期清理时间。默认值为0，表示不自动清理。
expire_logs_days=7
## 跳过主从复制中遇到的所有错误或指定类型的错误，避免slave端复制中断。
## 如：1062错误是指一些主键重复，1032错误是因为主从数据库数据不一致
slave_skip_errors=1062
重启后一定要执行如下命令看下是否有启动成功,若启动成功,则说明配置正常,容器正常。docker restart mysql-master
docker ps -a
3、进入mysql-master容器内部：[root@blog-tag-gg conf]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a1308309a139 mysql:5.7 "docker-entrypoint.s…" 6 minutes ago Up 4 seconds 33060/tcp, 0.0.0.0:3307->3306/tcp, :::3307->3306/tcp mysql-master
docker exec -it mysql-master /bin/bash
输入如下命令回车并输入数据库root密码看是否可进入数据库,若能进入，则正常。
4、mysql-master容器实例内部创建数据同步用户mysql -uroot -p
创建slave用户并设置密码,以及设置连接权限为%
创建后：CREATE USER 'slave'@'%' IDENTIFIED BY 'blogtagggpw';
GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'slave'@'%';
5、新建从服务器容器实例 端口为：3308mysql> CREATE USER 'slave'@'%' IDENTIFIED BY 'blogtagggpw';
Query OK, 0 rows affected (0.01 sec)
mysql> GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO 'slave'@'%';
Query OK, 0 rows affected (0.00 sec)
mysql>
docker run -p 3308:3306 --name mysql-slave \
-v /mydata/mysql-slave/log:/var/log/mysql \
-v /mydata/mysql-slave/data:/var/lib/mysql \
-v /mydata/mysql-slave/conf:/etc/mysql \
-e MYSQL_ROOT_PASSWORD=blogtagggpw \
-d mysql:5.7
6、进入/mydata/mysql-slave/conf目录,创建my.cnf文件并写入如下代码[root@blog-tag-gg conf]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
738d0b3cc403 mysql:5.7 "docker-entrypoint.s…" 25 seconds ago Up 23 seconds 33060/tcp, 0.0.0.0:3308->3306/tcp, :::3308->3306/tcp mysql-slave
a1308309a139 mysql:5.7 "docker-entrypoint.s…" 17 minutes ago Up 11 minutes 33060/tcp, 0.0.0.0:3307->3306/tcp, :::3307->3306/tcp mysql-master
7、重启从服务器容器。[mysqld]
## 设置server_id，同一局域网中需要唯一
server_id=102
## 指定不需要同步的数据库名称
binlog-ignore-db=mysql
## 开启二进制日志功能，以备Slave作为其它数据库实例的Master时使用
log-bin=mall-mysql-slave1-bin
## 设置二进制日志使用内存大小（事务）
binlog_cache_size=1M
## 设置使用的二进制日志格式（mixed,statement,row）
binlog_format=mixed
## 二进制日志过期清理时间。默认值为0，表示不自动清理。
expire_logs_days=7
## 跳过主从复制中遇到的所有错误或指定类型的错误，避免slave端复制中断。
## 如：1062错误是指一些主键重复，1032错误是因为主从数据库数据不一致
slave_skip_errors=1062
## relay_log配置中继日志
relay_log=mall-mysql-relay-bin
## log_slave_updates表示slave将复制事件写进自己的二进制日志
log_slave_updates=1
## slave设置为只读（具有super权限的用户除外）
read_only=1
重启后执行如下命令看是否有启动成功。（有up表示启动成功）docker restart mysql-slave
8、在主数据库中查看主从同步状态。docker ps -a
登录主服务器容器进入数据库,执行如下命令查看同步状态
结果如下：表示设置成功。show master status;
9、进入从容器服务器 mysql-slavemysql> show master status;
+-----------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-----------------------+----------+--------------+------------------+-------------------+
| mall-mysql-bin.000001 | 617 | | mysql | |
+-----------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
10、在从数据库中配置主从复制：docker exec -it mysql-slave
通过数据库密码进入数据库后执行如下命令配置
各项说明可参考：change master to master_host='192.168.16.4',master_user='slave',master_password='blogtagggpw',master_port=3307,master_log_file='mall-mysql-bin.000001',master_log_pos=617,master_connect_retry=30;
master_host：主数据库的IP地址；可以通过ifconfig 命令查看。
master_port：主数据库的运行端口；
master_user：在主数据库创建的用于同步数据的用户账号；
master_password：在主数据库创建的用于同步数据的用户密码；
master_log_file：指定从数据库要复制数据的日志文件，通过查看主数据的状态，获取File参数；
master_log_pos：指定从数据库从哪个位置开始复制数据，通过查看主数据的状态，获取Position参数；
master_connect_retry：连接失败重试的时间间隔，单位为秒。
11、在从数据库中查看主从同步状态
结果：show slave status \G;
显示如下则表示还没开始同步mysql> show slave status \G;
*************************** 1. row ***************************Slave_IO_State:
Master_Host: 192.168.16.4
Master_User: slave
Master_Port: 3307
Connect_Retry: 30
Master_Log_File: mall-mysql-bin.000001
Read_Master_Log_Pos: 617
Relay_Log_File: mall-mysql-relay-bin.000001
Relay_Log_Pos: 4
Relay_Master_Log_File: mall-mysql-bin.000001
Slave_IO_Running: No
Slave_SQL_Running: No
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: 617
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: /var/lib/mysql/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)
ERROR:
No query specified
12、在从数据库中开启主从同步：Slave_IO_Running: No
Slave_SQL_Running: No
13、查看从数据库中状态,此时发现已同步mysql> start slave;
Query OK, 0 rows affected (0.38 sec)
执行命令
返回结果：发现编程了yes,则表示正常了。show slave status \G;
14、主从复制测试：mysql> show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.16.4
Master_User: slave
Master_Port: 3307
Connect_Retry: 30
Master_Log_File: mall-mysql-bin.000003
Read_Master_Log_Pos: 154
Relay_Log_File: mall-mysql-relay-bin.000004
Relay_Log_Pos: 377
Relay_Master_Log_File: mall-mysql-bin.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: 154
Relay_Log_Space: 812
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: 101
Master_UUID: 5a4efa74-552b-11ed-a3c5-0242ac110002
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 (0.13 sec)
ERROR:
No query specified
在主数据库中创建数据库及表以及写入信息
登录从数据库,看是否可以直接打开 blogtaggg_db 这个数据库并查看数据。mysql> create database blogtaggg_db;
Query OK, 1 row affected (0.11 sec)
mysql> use blogtaggg_db;
Database changed
mysql> create table t1(id int,name varchar(20));
Query OK, 0 rows affected (0.09 sec)
mysql> insert into t1 values(1,'www.zfcdn.xyz');
Query OK, 1 row affected (0.02 sec)
mysql> select * from t1;
+------+-------------+
| id | name |
+------+-------------+
| 1 | www.zfcdn.xyz |
+------+-------------+
1 row in set (0.00 sec)
查看数据已经同步到从数据库了,大工搞成。mysql> use blogtaggg_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> select * from t1;
+------+-------------+
| id | name |
+------+-------------+
| 1 | www.zfcdn.xyz |
+------+-------------+
1 row in set (0.03 sec)
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