“Docker备份容器”的版本间的差异
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Jihongchang（讨论 | 贡献） |
Jihongchang（讨论 | 贡献） |
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| 第19行： | 第19行： | ||
</syntaxhighlight>如果我们将这些Docker镜像作为tar包文件备份到了本地，那么我们只要使用 docker load 命令，后面加上tar包的备份路径，就可以加载该Docker镜像了。<syntaxhighlight lang="shell-session"> | </syntaxhighlight>如果我们将这些Docker镜像作为tar包文件备份到了本地，那么我们只要使用 docker load 命令，后面加上tar包的备份路径，就可以加载该Docker镜像了。<syntaxhighlight lang="shell-session"> | ||
[root@iZ8vbcjkeqbrdmmbt23vboZ ~]# docker load -i ~/container-backup.tar | [root@iZ8vbcjkeqbrdmmbt23vboZ ~]# docker load -i ~/container-backup.tar | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | === 备份 image 到私有 Registry === | ||
| + | <syntaxhighlight lang="shell-session"> | ||
| + | [root@iZ8vbcjkeqbrdmmbt23vboZ ~]# docker images | ||
| + | REPOSITORY TAG IMAGE ID CREATED SIZE | ||
| + | mediawiki 20230206 40b7a89a5482 29 seconds ago 1.66GB | ||
| + | mysql 20230110 c9e6530d28b4 3 weeks ago 303MB | ||
| + | [root@iZ8vbcjkeqbrdmmbt23vboZ ~]# docker tag 40b7a89a5482 registry.cn-hangzhou.aliyuncs.com/www_jihongchang_top/wiki:mediawiki_20230206 | ||
| + | [root@iZ8vbcjkeqbrdmmbt23vboZ ~]# docker push registry.cn-hangzhou.aliyuncs.com/www_jihongchang_top/wiki:mediawiki_20230206 | ||
| + | The push refers to repository [registry.cn-hangzhou.aliyuncs.com/www_jihongchang_top/wiki] | ||
| + | 04c6a85fc579: Pushing [=========================> ] 436.8MB/872.7MB | ||
| + | f5fd5e55e174: Layer already exists | ||
| + | f889b881cdaa: Layer already exists | ||
| + | ef7d630f9747: Layer already exists | ||
| + | 1792b352b678: Layer already exists | ||
| + | 243425e22597: Layer already exists | ||
| + | 20de88a1924a: Layer already exists | ||
| + | 32f881145c7d: Layer already exists | ||
| + | ee090b01bc23: Layer already exists | ||
| + | 6bd0e6fcab85: Layer already exists | ||
| + | d51785f7f213: Layer already exists | ||
| + | 5a671bfd0b9a: Layer already exists | ||
| + | 7319d475e305: Layer already exists | ||
| + | 781f2b3fb29c: Layer already exists | ||
| + | 17398fc120fa: Layer already exists | ||
| + | cfa11f06a213: Layer already exists | ||
| + | 8f477d20e632: Layer already exists | ||
| + | 658dc28b7c93: Layer already exists | ||
| + | 89a3f58688e1: Layer already exists | ||
| + | 3af749400b4a: Layer already exists | ||
| + | e1bbcf243d0e: Layer already exists | ||
| + | [root@iZ8vbcjkeqbrdmmbt23vboZ ~]# | ||
</syntaxhighlight> | </syntaxhighlight> | ||
2023年2月6日 (一) 15:20的版本
为了备份容器，首先需要创建目标容器的快照
[root@iZ8vbcjkeqbrdmmbt23vboZ apache2]# docker commit -p aade5ae73079 mediawiki:backup
sha256:4c5b2bca4f4414a4799185dc93ec8b45f22edaf14f37226633ebcf5fcfcd468a
该命令会生成一个作为Docker镜像的容器快照，可以通过运行 docker images 命令来查看Docker镜像，如下:
[root@iZ8vbcjkeqbrdmmbt23vboZ apache2]# docker commit -p aade5ae73079 mediawiki:backup
sha256:4c5b2bca4f4414a4799185dc93ec8b45f22edaf14f37226633ebcf5fcfcd468a
[root@iZ8vbcjkeqbrdmmbt23vboZ apache2]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
mediawiki backup 4c5b2bca4f44 About a minute ago 1.28GB
droidwiki/restbase latest e65d562a0caf 5 months ago 267MB
mediawiki 1.35.4 168ad9077b3c 8 months ago 789MB
mysql 5.6 10de32843f91 8 months ago 303MB
nlpub/mathoid latest 308bf216c0b3 2 years ago 1.16GB
[root@iZ8vbcjkeqbrdmmbt23vboZ apache2]#
现在，为了备份该快照，我们有两个选择，一个是我们可以登录进Docker注册中心，并推送该镜像；另一个是我们可以将Docker镜像打包成tar包备份，以供今后使用。
如果我们不想备份到docker注册中心，而是想要将此镜像保存在本地机器中，以供日后使用，那么我们可以将其作为tar包备份。要完成该操作，我们需要运行以下 docker save 命令。
[root@iZ8vbcjkeqbrdmmbt23vboZ ~]# docker save -o ~/mediawiki_backup.tar mediawiki:backup
如果我们将这些Docker镜像作为tar包文件备份到了本地，那么我们只要使用 docker load 命令，后面加上tar包的备份路径，就可以加载该Docker镜像了。
[root@iZ8vbcjkeqbrdmmbt23vboZ ~]# docker load -i ~/container-backup.tar
备份 image 到私有 Registry
[root@iZ8vbcjkeqbrdmmbt23vboZ ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
mediawiki 20230206 40b7a89a5482 29 seconds ago 1.66GB
mysql 20230110 c9e6530d28b4 3 weeks ago 303MB
[root@iZ8vbcjkeqbrdmmbt23vboZ ~]# docker tag 40b7a89a5482 registry.cn-hangzhou.aliyuncs.com/www_jihongchang_top/wiki:mediawiki_20230206
[root@iZ8vbcjkeqbrdmmbt23vboZ ~]# docker push registry.cn-hangzhou.aliyuncs.com/www_jihongchang_top/wiki:mediawiki_20230206
The push refers to repository [registry.cn-hangzhou.aliyuncs.com/www_jihongchang_top/wiki]
04c6a85fc579: Pushing [=========================> ] 436.8MB/872.7MB
f5fd5e55e174: Layer already exists
f889b881cdaa: Layer already exists
ef7d630f9747: Layer already exists
1792b352b678: Layer already exists
243425e22597: Layer already exists
20de88a1924a: Layer already exists
32f881145c7d: Layer already exists
ee090b01bc23: Layer already exists
6bd0e6fcab85: Layer already exists
d51785f7f213: Layer already exists
5a671bfd0b9a: Layer already exists
7319d475e305: Layer already exists
781f2b3fb29c: Layer already exists
17398fc120fa: Layer already exists
cfa11f06a213: Layer already exists
8f477d20e632: Layer already exists
658dc28b7c93: Layer already exists
89a3f58688e1: Layer already exists
3af749400b4a: Layer already exists
e1bbcf243d0e: Layer already exists
[root@iZ8vbcjkeqbrdmmbt23vboZ ~]#