1. 部署环境
系统版本：Centos7.9
服务器ip：192.168.5.152（mysql主）,192.168.5.144（mysql从）
mysql版本：5.7
2. 部署mysql
2.1 部署master
2.1.1 创建mysql目录
mkdir --p /data/mysql
cd /data/mysql
mkdir conf
mkdir data
mkdir log2.1.2 创建mysql配置文件
vim conf/my.cnf
[mysqld]
# [必须]服务器唯一ID, 主库的server-id值必须比从库的小
server-id=104
# [必须]启用二进制日志
log-bin=mysql-bin
# 复制过滤：也就是指定哪个数据库不用同步（mysql库一般不同步）
binlog-ignore-db=mysql
# 确保binlog日志写入后与硬盘同步
sync_binlog = 1
# 跳过所有的错误，继续执行复制操作
slave-skip-errors = all
# default
skip-host-cache
skip-name-resolve
datadir=/var/lib/mysql
socket=/var/run/mysqld/mysqld.sock
secure-file-priv=/var/lib/mysql-files
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
#log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[client]
socket=/var/run/mysqld/mysqld.sock
!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/2.1.3 编写docker-compose文件
cd /data/mysql
vim mysql.yaml
version: '3'
services:
mysql:
container_name: mysql-master
image: mysql:5.7
restart: always
volumes:
- ./log:/var/log/mysql
- ./conf/my.cnf:/etc/mysql/my.cnf
- ./data:/var/lib/mysql
ports:
- '3306:3306'
command: [
'--explicit_defaults_for_timestamp=true',
'--character-set-server=utf8mb4',
'--collation-server=utf8mb4_general_ci',
'--max_connections=3000'
]
environment:
MYSQL_ROOT_PASSWORD: "shield"2.1.4 启动mysql容器
cd /data/mysql
docker-compose -f mysql.yaml up --d2.1.5 进入容器，创建同步账号，并开启权限
docker exec -it mysql-master bash
mysql -uroot -pshield
# 查看配置的服务ID，显示的应该是配置的ID
mysql> show variables like '%server_id%';
# 看master信息 File 和 Position 从服务上要用
mysql> show master status;
# 创建同步账户并开启权限，只是同步账号
mysql> create user 'sync'@'%' identified by '123456';
mysql> grant replication slave,replication client on *.* to 'sync'@'%';
# 刷新信息生效
mysql> flush privileges;2.2 部署slave
2.2.1 创建mysql目录
mkdir --p /data/mysql
cd /data/mysql
mkdir conf
mkdir data
mkdir log2.2.2 创建mysql配置文件
vim conf/my.cnf
[mysqld]
# [必须]服务器唯一ID
server-id=106
# [必须]启用二进制日志
log-bin=mysql-bin
# 复制过滤：也就是指定哪个数据库不用同步（mysql库一般不同步）
binlog-ignore-db=mysql
# 确保binlog日志写入后与硬盘同步
sync_binlog = 1
# 跳过所有的错误，继续执行复制操作
slave-skip-errors = all
# relay_log配置中继日志
relay_log=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
# default
skip-host-cache
skip-name-resolve
datadir=/var/lib/mysql
socket=/var/run/mysqld/mysqld.sock
secure-file-priv=/var/lib/mysql-files
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
#log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[client]
socket=/var/run/mysqld/mysqld.sock
!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/2.2.3 编写docker-compose文件
cd /data/mysql
vim mysql.yaml
version: '3'
services:
mysql:
container_name: mysql-slave
image: mysql:5.7
restart: always
volumes:
- ./log:/var/log/mysql
- ./conf/my.cnf:/etc/mysql/my.cnf
- ./data:/var/lib/mysql
ports:
- '3306:3306'
command: [
'--explicit_defaults_for_timestamp=true',
'--character-set-server=utf8mb4',
'--collation-server=utf8mb4_general_ci',
'--max_connections=3000'
]
environment:
MYSQL_ROOT_PASSWORD: "shield"2.2.4 启动mysql容器
cd /data/mysql
docker-compose -f mysql.yaml up --d
2.2.5 进入容器，连接mysql主服务
docker exec -it mysql-slave bash
mysql -uroot -pshield
#查看server_id是否生效
mysql> show variables like '%server_id%';
# 连接主mysql服务 master_log_file 和 master_log_pos的值要填写主master里查出来的值 注意这里使用的docker-compose 内部服务的端口和ip，实际应该为真实的master_host，参数看后面的介绍
mysql> change master to master_host='192.168.5.152',master_user='sync',master_password='123456',master_port=3306,master_log_file='mysql-bin.000004', master_log_pos=313,master_connect_retry=30;
# 开启slave
mysql> start slave;
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.5.152
Master_User: sync
Master_Port: 3306
Connect_Retry: 30
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 313
Relay_Log_File: mysql-relay-bin.000007
Relay_Log_Pos: 526
Relay_Master_Log_File: mysql-bin.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: 313
Relay_Log_Space: 899
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: 104
Master_UUID: 5f25a087-8379-11ee-8a89-0242ac120002
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)
看到下列信息代表链接成功
Slave_IO_Running: Yes
Slave_SQL_Running: Yes至此docker-compose部署mysql5.7主从完毕。
3. 主从切换
3.1停止原主mysql
docker stop mysql-master3.2停止从数据库的复制线程
mysql> stop slave;
mysql> reset slave all;3.3 将从数据库升为主数据库
mysql> reset master;3.4 原主数据库降为从数据库
mysql> CHANGE MASTER TO MASTER_HOST = '192.168.5.144', MASTER_USER = 'sync', MASTER_PASSWORD = '123456';
mysql> start slave;
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.5.144
Master_User: sync
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 304
Relay_Log_File: e75962e1de15-relay-bin.000007
Relay_Log_Pos: 517
Relay_Master_Log_File: 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: 304
Relay_Log_Space: 731
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: 106
Master_UUID: 616899ae-837e-11ee-b615-0242ac120002
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)至此手动切换mysql主从完成。