路径
数据库：/usr/local/database
服务器：/usr/local/serverFolder
mysql
代码语言：javascript复制# 拉取镜像
docker pull mysql:8.0.20
# 启动加挂载
docker run -d -p 3306:3306 -v /usr/local/database/mysql/conf:/etc/mysql/conf.d -v /usr/local/database/mysql/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 --name cxymysql mysql:8.0.20集群
代码语言：javascript复制# 创建两个文件夹，用来挂载数据，和配置文件。
# 主节点
[mysqld]
server_id=1
skip-host-cache
skip-name-resolve
# 从节点
[mysqld]
server_id=2
skip-host-cache
skip-name-resolve
# 两个文件主要内容的差异是 server_id 值的不同，必须设置，否则在配置从库时，会报错：
# 主库启动
docker run -d -e MYSQL_ROOT_PASSWORD=123456 --name mysqlMaster --restart always -v /usr/local/database/mysql/mysqlMaster3306/data:/var/lib/mysql -v /usr/local/database/mysql/mysqlMaster3306:/etc/mysql/conf.d -p 3306:3306 mysql:8.0.20
# 从库启动
docker run -d -e MYSQL_ROOT_PASSWORD=123456 --name mysqlSlave --restart always -v /usr/local/database/mysql/mysqlSlave3307/data:/var/lib/mysql -v /usr/local/database/mysql/mysqlSlave3307:/etc/mysql/conf.d -p 3307:3306 mysql:8.0.20
# 启动成功，外部测试都可以连接成功
[root@centos8 mysqlSlave3307]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
992d0be96bc1 mysql:8.0.20 "docker-entrypoint.s…" 5 seconds ago Up 3 seconds 33060/tcp, 0.0.0.0:3307->3306/tcp mysqlSlave
23ceac64fab5 mysql:8.0.20 "docker-entrypoint.s…" 3 minutes ago Up 3 minutes 0.0.0.0:3306->3306/tcp, 33060/tcp mysqlMaster
# 进入主节点内部，查看主机挂载配置文件，没有问题。----------------------------------------------------------------
[root@centos8 mysqlSlave3307]# docker exec -it 23ceac64fab5 /bin/bash
root@23ceac64fab5:/# cd /etc/mysql/conf.d/
root@23ceac64fab5:/etc/mysql/conf.d# ls
data master.cnf
root@23ceac64fab5:/etc/mysql/conf.d# cat master.cnf
[mysqld]
server_id=1
skip-host-cache
skip-name-resolve
# 登陆主节点mysql 大p是端口，小p是密码
mysql -u root -h 127.0.0.1 -P 3306 -p
# 创建用户
# 创建用户，identified with 'mysql_native_password' 表示使用该用户的密码加密方式。
# 赋予用户相应的权限；
# 刷新 MySql 系统权限。
mysql> create user 'reader'@'%' identified with 'mysql_native_password' by 'reader';
Query OK, 0 rows affected (0.01 sec)
mysql> grant all privileges on *.* to 'reader'@'%';
Query OK, 0 rows affected (0.02 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
# 查看 master 节点的状态
mysql> show master status;
--------------- ---------- -------------- ------------------ -------------------
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
--------------- ---------- -------------- ------------------ -------------------
| binlog.000002 | 819 | | | |
--------------- ---------- -------------- ------------------ -------------------
1 row in set (0.00 sec)
# 进入从节点内部，查看主机挂载配置文件，没有问题。-----------------------------------------------------------------
# 将次节点挂载到主库下面
mysql> CHANGE MASTER TO MASTER_HOST='192.168.106.129',Master_Port=3306,MASTER_USER='reader',MASTER_PASSWORD='reader',MASTER_LOG_FILE='binlog.000002',MASTER_LOG_POS=0;
Query OK, 0 rows affected, 2 warnings (0.05 sec)
# 开启主从同步
mysql> start slave;
Query OK, 0 rows affected (0.06 sec)
# 查看从库状态 Slave_IO_Running: Yes Slave_SQL_Running: Yes 即为成功。
mysql> show slave statusG;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.106.129
Master_User: reader
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: binlog.000002
Read_Master_Log_Pos: 819
Relay_Log_File: 992d0be96bc1-relay-bin.000002
Relay_Log_Pos: 1028
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: 819
Relay_Log_Space: 1244
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: 887c1b23-d39c-11ea-ab3b-0242ac110002
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 (0.00 sec)
ERROR:
No query specified
测试成功
