From 6a2c22c7a3a70b99e6f2dbe2866b5a4cffb2e968 Mon Sep 17 00:00:00 2001
From: bob <bob.liu.happyelements.com>
Date: Sun, 16 Apr 2023 17:03:39 +0800
Subject: [PATCH] feat(doc) mysql backup

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 _doc/mysql备份与恢复.md | 45 ++++++++++++++++++++++++++++++++++++
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 create mode 100644 _doc/mysql备份与恢复.md

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+### 备份
+
+以下命令用于将容器内的 mysql 的特定数据库备份到 sql 文件:
+
+```sh
+# 进入 mysql 容器(宿主机执行)
+docker exec -it mysql bash
+
+# 执行备份, 此命令演示中仅备份 iot 数据库(容器内执行)
+mysqldump -u root -p -h 127.0.0.1 oa_system > /tmp/oa_system.sql
+mysqldump -u root -p -h 127.0.0.1 crm_single > /tmp/crm_single.sql
+mysqldump -u root -p -h 127.0.0.1 hrm_single > /tmp/hrm_single.sql
+mysqldump -u root -p -h 127.0.0.1 nacos > /tmp/nacos.sql
+mysqldump -u root -p -h 127.0.0.1 teamwork > /tmp/teamwork.sql
+
+# 将备份文件复制到宿主机(宿主机执行)
+docker cp mysql:/tmp/oa_system.sql ./oa_system.sql
+
+# 打包备份文件，压缩存储对于文本文件可以节省大量空间(宿主机执行)
+tar -zcvf oa_system.sql.tzr.gz oa_system.sql
+```
+
+### 恢复
+
+以下命名将备份的 sql 文件恢复到容器内的 mysql 数据库中:
+
+```sh
+# 解压备份文件, 解压后生成 iot.sql(宿主机执行)
+tar -zxvf oa_system.sql.tar.gz
+
+# 将备份文件复制到容器内(宿主机执行)
+docker cp oa_system.sql mysql:/tmp/iot.sql
+
+# 进入 mysql 容器(宿主机执行)
+docker exec -it mysql bash
+
+# 执行恢复(容器内执行)
+mysql -u root -p oa_system < oa_system.sql
+```
+
+**全新的数据库在恢复之前需要先创建该数据库，然后再进行恢复:**
+
+```sql
+create database iot default character set utf8mb4 collate utf8mb4_unicode_ci;
+```