Docker manifest指令

• 官网说明
• 使用样例
  • 未开启 experimental 特性，无法使用manifest指令
  • 开启experimental的测试样例
• manifest里都可以包含哪些信息？
• manifest都有哪些子命令？

官网说明

https://docs.docker.com/engine/reference/commandline/manifest/

使用样例

未开启 experimental 特性，无法使用manifest指令

[root@thatscode.com ~]# docker manifest inspec docker:17.05
docker manifest is only supported on a Docker cli with experimental cli features enabled
[root@thatscode.com ~]#

开启experimental的测试样例

下面为在MacOS上开启experimental特性之后实际测试的一个输出，查看的镜像为elasticsearch的一个官方镜像，elasticsearch:7.16.2，可以看到这个镜像就是同时支持amd64和arm64架构的。

➜ /Users/stephen/Documents/WorkDir/docker >docker manifest inspect elasticsearch:7.16.2
{
   "schemaVersion": 2,
   "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json",
   "manifests": [
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "size": 2204,
         "digest": "sha256:3e82c0aefb87f2b716d0d09ffc252076b200a05eb1692c795dcb5c3057952477",
         "platform": {
            "architecture": "amd64",
            "os": "linux"
         }
      },
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "size": 2204,
         "digest": "sha256:5837d1482e31630c7c8f0b309743361c260c50749dd2ca14d96b8950f727993b",
         "platform": {
            "architecture": "arm64",
            "os": "linux",
            "variant": "v8"
         }
      }
   ]
}

manifest里都可以包含哪些信息？

A single manifest is information about an image, such as layers, size, and digest. The docker manifest command also gives users additional information such as the os and architecture an image was built for.

• layers
• size
• digest
• os/arch

manifest都有哪些子命令？

Command	Description
docker manifest annotate	Add additional information to a local image manifest
docker manifest create	Create a local manifest list for annotating and pushing to a registry
docker manifest inspect	Display an image manifest, or manifest list
docker manifest push	Push a manifest list to a repository
docker manifest rm	Delete one or more manifest lists from local storage