1.Docker mysql 搭建主从架构
1.Docker 搭建主服务器
docker run -d \
-p 3307:3306 \
-v /Users/guaguaerhao/docker/mysql-master-slave/master/conf:/etc/mysql/conf.d \
-v /Users/guaguaerhao/docker/mysql-master-slave/master/data:/var/lib/mysql \
-v /Users/guaguaerhao/docker/mysql-master-slave/master/log:/var/log/mysql \
-v /Users/guaguaerhao/docker/mysql-master-slave/master/mysql-files:/var/lib/mysql-files \
-e MYSQL_ROOT_PASSWORD=rootroot \
--name atguigu-mysql-master \
-d mysql:8.0.33 \
--character-set-server=utf8mb4 \
--collation-server=utf8mb4_general_ci
2.配置my.cnf
[mysqld]
# 服务器唯一id，默认值为1
server-id=1
# 设置日志格式，默认值ROW
binlog_format=STATEMENT
# log-bin=binlog
# 设置需要复制的数据库，默认复制全部数据库
#binlog-do-db=mytestdb
#设置不需要复制的数据库
#binlog-ignore-db=mysql
#binlog-ignore-db=information_schema
binlog 格式说明：
binlog_format=STATEMENT：日志记录的是主机数据库的写指令，性能高，但now()之类的函数以及获取系统参数的操作会出现主从数据不同步的问题。
binlog_format=ROW（默认）：日志记录的是主机数据库的写后的数据，批量操作性能较差，解决now()或者user()或者@@hostname等操作在主从机器上不一致的问题
3.在mysql主服务，配置slave账号，用于从服务同步数据
使用mysql -uroot -prootroot在mysql主服务登录，然后执行下方sql
# 1.创建账号
create user 'slave'@'%';
# 2.设置密码
alter user 'slave'@'%' identified with mysql_native_password by 'rootroot';
# 3.授予slave权限，第一个*是所有数据库，第二个*是所有数据表
grant replication slave on *.* to 'slave'@'%';
# 4.刷新数据库
flush privileges;
经过上述步骤之后，对slave账号授予了远程复制的权限，其他权限都不分配
# 查询master的状态，为从服务器配置做准备
mysql> show master status;
+---------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------+----------+--------------+------------------+-------------------+
| binlog.000005 | 157 | | | |
+---------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
4.准备mysql从服务
docker run -d \
-p 3308:3306 \
-v /Users/guaguaerhao/docker/mysql-master-slave/slave1/conf:/etc/mysql/conf.d \
-v /Users/guaguaerhao/docker/mysql-master-slave/slave1/data:/var/lib/mysql \
-v /Users/guaguaerhao/docker/mysql-master-slave/slave1/log:/var/log/mysql \
-v /Users/guaguaerhao/docker/mysql-master-slave/slave1/mysql-files:/var/lib/mysql-files \
-e MYSQL_ROOT_PASSWORD=rootroot \
--name atguigu-mysql-slave1 \
-d mysql:8.0.33 \
--character-set-server=utf8mb4 \
--collation-server=utf8mb4_general_ci
5.准备从服务器的配置my.cnf
[mysqld]
# 服务器唯一id，每台服务器的id必须不同，如果配置其他从机，注意修改id
server-id=2
# 中继日志名，默认xxxxx-relay-bin
#relay-log=relay-bin
6.在从服务器配置主从关系
# 在从服务器，mysql命令中执行以下sql
change master to master_host='192.168.31.34',master_user='slave',master_password='rootroot',master_port=3307,master_log_file='binlog.000002',master_log_pos=1051;
7.启动主从同步
#启动从服务器的复制功能，从服务器执行以下sql
start slave;
#查看状态
show slave status \G;
重复4 - 7步骤
4.准备mysql从服务
docker run -d \
-p 3309:3306 \
-v /Users/guaguaerhao/docker/mysql-master-slave/slave2/conf:/etc/mysql/conf.d \
-v /Users/guaguaerhao/docker/mysql-master-slave/slave2/data:/var/lib/mysql \
-v /Users/guaguaerhao/docker/mysql-master-slave/slave2/log:/var/log/mysql \
-v /Users/guaguaerhao/docker/mysql-master-slave/slave2/mysql-files:/var/lib/mysql-files \
-e MYSQL_ROOT_PASSWORD=rootroot \
--name atguigu-mysql-slave2 \
-d mysql:8.0.33 \
--character-set-server=utf8mb4 \
--collation-server=utf8mb4_general_ci
5.准备从服务器的配置my.cnf
[mysqld]
# 服务器唯一id，每台服务器的id必须不同，如果配置其他从机，注意修改id
server-id=3
# 中继日志名，默认xxxxx-relay-bin
#relay-log=relay-bin
6.在从服务器配置主从关系
# 在从服务器，mysql命令中执行以下sql
change master to master_host='192.168.31.34',master_user='slave',master_password='rootroot',master_port=3307,master_log_file='binlog.000002',master_log_pos=1051;
7.启动主从同步
#启动从服务器的复制功能，从服务器执行以下sql
start slave;
#查看状态
show slave status \G;
8.结果
着重查看这两个属性：
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for source to send event
Master_Host: 192.168.2.52
Master_User: slave
Master_Port: 3400
Connect_Retry: 60
Master_Log_File: binlog.000006
Read_Master_Log_Pos: 157
Relay_Log_File: 30126857f0b2-relay-bin.000003
Relay_Log_Pos: 323
Relay_Master_Log_File: binlog.000006
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: 157
Relay_Log_Space: 720
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: cb6a89ea-2322-11ee-a186-0242ac110002
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Replica 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, 1 warning (0.00 sec)
ERROR:
No query specified
9.测试同步
在master创建数据库db_user，片刻，slave1,slave2也出现db_user(手动刷新)
