添加mysql主从搭建文档

docs/other/database/mysql主从复制.md

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+---
+title: Mysql主从复制部署
+date: 2021-11-27
+author: chensino
+publish: true
+isOriginal: true
+---
+
+## 参考博客
+
+<https://juejin.cn/post/7160580280682545166#heading-23>
+
+<https://blog.csdn.net/qq_36357242/article/details/136211471>
+
+## compose地址
+
+<https://github.com/ChenSino/mysql-replica.git>
+
+## 部署单向主从
+
+~~~shell
+#启动容器
+docker compose up -d
+~~~
+
+**主库中操作**
+
+~~~shell
+#进入容器
+docker exec -it mysql-master mysql -uroot -p123456
+
+#为了避免从服务复制出现权限不足的情况需要执行
+ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';
+
+
+# 查看状态
+SHOW MASTER STATUS;
+
++-------------------+----------+--------------+------------------+------------------------------------------------------------------------------------+
+| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                                                                  |
++-------------------+----------+--------------+------------------+------------------------------------------------------------------------------------+
+| master-bin.000003 |     1492 | test_db      |                  | efa1b6c2-ac9d-11ef-9800-0242ac120002:1-3,
+efbc16db-ac9d-11ef-9665-0242ac120003:1-3 |
++-------------------+----------+--------------+------------------+------------------------------------------------------------------------------------+
+1 row in set (0.00 sec)
+
+~~~
+
+上面`SHOW MASTER STATUS;`结果中的File 和 Position 的值需要记下，在从库中会用到
+
+**从库中的操作**
+
+~~~shell
+#进入从库
+docker exec -it mysql-slave mysql -uroot -p123456
+
+# 进入从库mysql后执行，指定主库的信息，这里注意host使用的容器名字，port是容器内端口，SOURCE_LOG_FILE和SOURCE_LOG_POS就是在主库获取的，mysql8以上版本使用CHANGE REPLICATION SOURCE 代替CHANGE MASTER
+CHANGE REPLICATION SOURCE TO 
+    SOURCE_HOST='mysql-slave', 
+    SOURCE_USER='root', 
+    SOURCE_PASSWORD='123456',   #
+    SOURCE_PORT=3306, 
+    SOURCE_LOG_FILE='slave-bin.000003', 
+    SOURCE_LOG_POS=479;
+START REPLICA;
+
+#查看主从配置状态
+SHOW REPLICA STATUS\G;
+~~~
+
+当`SHOW REPLICA STATUS\G;`结果的以下字段为yes就ok了，若不是yes会在返回的而信息提供错误信息
+
+ ~~~shell
+  Slave_IO_Running: Yes
+  Slave_SQL_Running: Yes
+~~~
+
+
+## 部署主主复制（互为主从）
+
+在以上步骤基础上执行以下操作
+
+**在从库中执行**
+~~~shell
+#为了避免从服务复制出现权限不足的情况需要执行
+ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';
+
+# 查看状态
+SHOW MASTER STATUS;
+~~~
+
+**在主库执行**
+SOURCE_LOG_FILE和SOURCE_LOG_POS是在从库获取到的
+~~~shell
+#配置主服务器复制
+CHANGE REPLICATION SOURCE TO 
+    SOURCE_HOST='mysql-slave', 
+    SOURCE_USER='root', 
+    SOURCE_PASSWORD='123456', 
+    SOURCE_PORT=3306, 
+    SOURCE_LOG_FILE='slave-bin.000003', 
+    SOURCE_LOG_POS=479;
+START REPLICA;
+
+
+#开始复制
+START SLAVE;
+
+#查看主从配置状态
+SHOW REPLICA STATUS\G;
+~~~