Docker使用save和load进行保存镜像到本地和从本地加载镜像

我会带着你远行 2023-01-20 09:38 5阅读 0赞

### 一 保存镜像 ###

[root@localhost mydocker]# docker save --help
    
    Usage:  docker save [OPTIONS] IMAGE [IMAGE...]
    
    Save one or more images to a tar archive (streamed to STDOUT by default)
    
    Options:
      -o, --output string   Write to a file, instead of STDOUT

\-o 指定保存镜像的位置

**保存镜像时候要用镜像名称：标签，不要用镜像ID，否则导入默认镜像名称和版本为null。**

保存镜像redis到 /mydocker/images/redis.tar

[root@localhost mydocker]# docker images
    REPOSITORY   TAG       IMAGE ID       CREATED      SIZE
    redis        latest    ccee4cdf984f   8 days ago   105MB
    [root@localhost mydocker]# ls
    jdk.tar.gz  tomcat9  tomcat.tar.gz
    [root@localhost mydocker]# mkdir images
    [root@localhost mydocker]# cd images/
    [root@localhost images]# ls
    [root@localhost images]# docker save -o /mydocker/images/redis.tar redis
    [root@localhost images]# ls
    redis.tar

### 二 加载镜像 ###

[root@localhost mydocker]# docker load --help
    
    Usage:  docker load [OPTIONS]
    
    Load an image from a tar archive or STDIN
    
    Options:
      -i, --input string   Read from tar archive file, instead of STDIN
      -q, --quiet          Suppress the load output

\-i 指定加载的镜像

[root@localhost images]# docker rmi redis
    Untagged: redis:latest
    Untagged: redis@sha256:6cddb3822e19f09a6a369c35680562ddd2e44bd3bfd6fe25ec6456c42f45728b
    Deleted: sha256:ccee4cdf984f11952441cbab30146dae792c8d9fb668e762c78a49e7db858082
    Deleted: sha256:a4f3d68d06ee9aec1862695818528930f0e889f5c892da8be4c06759dc2e8f86
    Deleted: sha256:02c22c39334cefb22054330d3be804a3046286d7f0a47d83f5f25be13f4e635e
    Deleted: sha256:2d01997f1c500789fc369f5440ea810257641af6fbb1d4eaeb9558d94ea8879d
    Deleted: sha256:f448a5cc1367794bb2f15d887438c8b43f2324ee3523f5d95c15997685cc816d
    Deleted: sha256:e481db33c0c73ee7de5ecda57c21fcfb7eeeff7d22fcc4ad0166b0bf64a63a32
    [root@localhost images]# docker images
    REPOSITORY   TAG       IMAGE ID   CREATED   SIZE
    [root@localhost images]# docker load -i /mydocker/images/redis.tar
    89ce1a07a7e4: Loading layer [==================================================>]  338.4kB/338.4kB
    9eef6e3cc293: Loading layer [==================================================>]  4.194MB/4.194MB
    ee748697d275: Loading layer [==================================================>]   31.7MB/31.7MB
    f1f7964d40af: Loading layer [==================================================>]  2.048kB/2.048kB
    3d9fda8ff875: Loading layer [==================================================>]  3.584kB/3.584kB
    Loaded image: redis:latest
    [root@localhost images]# docker image
    
    Usage:  docker image COMMAND
    
    Manage images
    
    Commands:
      build       Build an image from a Dockerfile
      history     Show the history of an image
      import      Import the contents from a tarball to create a filesystem image
      inspect     Display detailed information on one or more images
      load        Load an image from a tar archive or STDIN
      ls          List images
      prune       Remove unused images
      pull        Pull an image or a repository from a registry
      push        Push an image or a repository to a registry
      rm          Remove one or more images
      save        Save one or more images to a tar archive (streamed to STDOUT by default)
      tag         Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
    
    Run 'docker image COMMAND --help' for more information on a command.
    [root@localhost images]# docker images
    REPOSITORY   TAG       IMAGE ID       CREATED      SIZE
    redis        latest    ccee4cdf984f   8 days ago   105MB