docker高级——mysql主从复制
新建master实例
[root@localhost ~]# 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=root \
> -d mysql:5.7
d492fa0e47453dc4868728dc005b5aee251e1758b2fee2c4ca411393c2608a35
[root@localhost ~]# cd /mydata/mysql-master/conf/
[root@localhost conf]# vi my.cnf
[root@localhost conf]# cat my.cnf
[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
[root@localhost conf]#
[root@localhost conf]# docker restart mysql-master
mysql-master
[root@localhost conf]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
d492fa0e4745 mysql:5.7 "docker-entrypoint.s…" 5 minutes ago Up 12 seconds 33060/tcp, 0.0.0.0:3307->3306/tcp, :::3307->3306/tcp mysql-master
2c0405e33fd9 redis:6.0.8 "docker-entrypoint.s…" 43 minutes ago Up 37 minutes 0.0.0.0:6379->6379/tcp, :::6379->6379/tcp myredis
7e477af1061c mysql:5.7 "docker-entrypoint.s…" About an hour ago Up About an hour 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql
f5bbe411a1ed registry "/entrypoint.sh /etc…" 5 hours ago Up 5 hours 0.0.0.0:5000->5000/tcp, :::5000->5000/tcp gallant_driscoll
[root@localhost conf]# docker exec -it mysql-master bash
root@d492fa0e4745:/# mysql -uroot -proot
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 2
Server version: 5.7.36-log 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> CREATE USER 'slave'@'%'IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.16 sec)
mysql> GRANT REPLICATION SLAVE,REPLICATION CLIENT ON *.* TO 'slave'@'%';
Query OK, 0 rows affected (0.01 sec)
mysql>
mysql> show master status;
+-----------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-----------------------+----------+--------------+------------------+-------------------+
| mall-mysql-bin.000001 | 617 | | mysql | |
+-----------------------+----------+--------------+------------------+-------------------+
1 row in set (0.01 sec)
新建slave实例
[root@localhost redis]# 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=root \
> -d mysql:5.7
8cc3572385e4ab234afb30df90b4dd1f7b25a631d35afa0e67e88081833a2ba6
[root@localhost redis]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8cc3572385e4 mysql:5.7 "docker-entrypoint.s…" 20 seconds ago Up 11 seconds 33060/tcp, 0.0.0.0:3308->3306/tcp, :::3308->3306/tcp mysql-slave
d492fa0e4745 mysql:5.7 "docker-entrypoint.s…" 12 minutes ago Up 7 minutes 33060/tcp, 0.0.0.0:3307->3306/tcp, :::3307->3306/tcp mysql-master
2c0405e33fd9 redis:6.0.8 "docker-entrypoint.s…" 50 minutes ago Up 44 minutes 0.0.0.0:6379->6379/tcp, :::6379->6379/tcp myredis
7e477af1061c mysql:5.7 "docker-entrypoint.s…" About an hour ago Up About an hour 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql
f5bbe411a1ed registry "/entrypoint.sh /etc…" 5 hours ago Up 5 hours 0.0.0.0:5000->5000/tcp, :::5000->5000/tcp gallant_driscoll
[root@localhost redis]# cd /mydata/mysql-slave/conf/
[root@localhost conf]# vi my.cnf
[root@localhost conf]# docker restart mysql-slave
mysql-slave
[root@localhost conf]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8cc3572385e4 mysql:5.7 "docker-entrypoint.s…" 7 minutes ago Up 7 seconds 33060/tcp, 0.0.0.0:3308->3306/tcp, :::3308->3306/tcp mysql-slave
d492fa0e4745 mysql:5.7 "docker-entrypoint.s…" 20 minutes ago Up 14 minutes 33060/tcp, 0.0.0.0:3307->3306/tcp, :::3307->3306/tcp mysql-master
2c0405e33fd9 redis:6.0.8 "docker-entrypoint.s…" 57 minutes ago Up 52 minutes 0.0.0.0:6379->6379/tcp, :::6379->6379/tcp myredis
7e477af1061c mysql:5.7 "docker-entrypoint.s…" About an hour ago Up About an hour 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql
f5bbe411a1ed registry "/entrypoint.sh /etc…" 5 hours ago Up 5 hours 0.0.0.0:5000->5000/tcp, :::5000->5000/tcp gallant_driscoll
[root@localhost conf]# cat my.cnf
[mysqld]
## 设置server id，同一局域网中需要唯
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-mysgl-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
[root@localhost conf]#
在从数据库中配置主从复制
change master to
master_host=‘192.168.253.128’,master_user=‘slave’,master_password=‘123456’,master_port=3307,master_log_file=‘mall-mysql-bin.000001’,master_log_pos=617,master_connect_retry=30;
mysql> change master to master_host='192.168.253.128',master_user='slave',master_password='123456',master_port=3307,master_log_file='mall-mysql-bin.000001',master_log_pos=617,master_connect_retry=30;
Query OK, 0 rows affected, 2 warnings (0.23 sec)
mysql> show slave status \G;
*************************** 1. row ***************************
Slave_IO_State:
Master_Host: 192.168.253.128
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
mysql>
##开启主从同步
mysql> start slave;
Query OK, 0 rows affected (0.01 sec)
mysql> show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.253.128
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.000002
Relay_Log_Pos: 325
Relay_Master_Log_File: mall-mysql-bin.000001
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: 617
Relay_Log_Space: 537
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: ab8c77b2-d944-11ed-9f7d-0242ac110005
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)
ERROR:
No query specified
mysql>
主库
mysql> create table userinfo (id int primary key auto_increment NOT NULL,username varchar(20),tel varchar(20));
Query OK, 0 rows affected (0.11 sec)
mysql> insert into userinfo values (0,'jl2','17854289303');
Query OK, 1 row affected (0.07 sec)
mysql> insert into userinfo values (0,'','17854289303');
Query OK, 1 row affected (0.01 sec)
mysql> select * from userinfo;
+----+----------+-------------+
| id | username | tel |
+----+----------+-------------+
| 1 | jl2 | 17854289303 |
| 2 | | 17854289303 |
+----+----------+-------------+
2 rows in set (0.04 sec)
mysql>
查看从库
mysql> use db1;
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 userinfo;
+----+----------+-------------+
| id | username | tel |
+----+----------+-------------+
| 1 | jl2 | 17854289303 |
| 2 | | 17854289303 |
+----+----------+-------------+
2 rows in set (0.04 sec)
mysql>