Docker CLI docker buildx imagetools inspect常用命令

Docker 是一个开源的应用容器引擎，让开发者可以打包他们的应用以及依赖包到一个可移植的镜像中，然后发布到任何流行的 Linux或Windows操作系统的机器上，也可以实现虚拟化。Docker是内核虚拟化，不使用Hypervisor是不完全虚拟化，依赖内核的特性实现资源隔离。本文主要介绍Docker CLI 中 docker buildx imagetools inspect常用命令。

1、docker buildx imagetools inspect简介

docker buildx imagetools在registry中处理镜像的命令。Imagetools包含用于在registry中处理清单列表的命令。这些命令对于检查多平台构建结果很有用。docker buildx imagetools inspect在registry中显示镜像的详细信息。

参考文档：https://docs.docker.com/engine/reference/commandline/buildx_imagetools_inspect/

2、docker buildx imagetools inspect语法

docker buildx imagetools inspect [OPTIONS] NAME

3、 docker buildx imagetools inspect命令

1）在registry中显示镜像的详细信息。

docker buildx imagetools inspect alpine
Name:      docker.io/library/alpine:latest
MediaType: application/vnd.docker.distribution.manifest.list.v2+json
Digest:    sha256:21a3deaa0d32a8057914f36584b5288d2e5ecc984380bc0118285c70fa8c9300

Manifests:
  Name:      docker.io/library/alpine:latest@sha256:e7d88de73db3d3fd9b2d63aa7f447a10fd0220b7cbf39803c803f2af9ba256b3
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/amd64

  Name:      docker.io/library/alpine:latest@sha256:e047bc2af17934d38c5a7fa9f46d443f1de3a7675546402592ef805cfa929f9d
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/arm/v6

  Name:      docker.io/library/alpine:latest@sha256:8483ecd016885d8dba70426fda133c30466f661bb041490d525658f1aac73822
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/arm/v7

  Name:      docker.io/library/alpine:latest@sha256:c74f1b1166784193ea6c8f9440263b9be6cae07dfe35e32a5df7a31358ac2060
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/arm64/v8

  Name:      docker.io/library/alpine:latest@sha256:2689e157117d2da668ad4699549e55eba1ceb79cb7862368b30919f0488213f4
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/386

  Name:      docker.io/library/alpine:latest@sha256:2042a492bcdd847a01cd7f119cd48caa180da696ed2aedd085001a78664407d6
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/ppc64le

  Name:      docker.io/library/alpine:latest@sha256:49e322ab6690e73a4909f787bcbdb873631264ff4a108cddfd9f9c249ba1d58e
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/s390x

2）输出格式化(--format)

.Name：提供镜像的引用。

.Manifest：提供清单或清单列表。

.Image: 提供镜像配置。

.BuildInfo：从镜像配置中提供构建信息。

docker buildx imagetools inspect alpine --format "{{.Name}}"
Name: docker.io/library/alpine:latest
docker buildx imagetools inspect crazymax/loop --format "{{.Manifest}}"
Name:      docker.io/crazymax/loop:latest
MediaType: application/vnd.docker.distribution.manifest.v2+json
Digest:    sha256:08602e7340970e92bde5e0a2e887c1fde4d9ae753d1e05efb4c8ef3b609f97f1
docker buildx imagetools inspect moby/buildkit:master --format "{{.Manifest}}"
Name:      docker.io/moby/buildkit:master
MediaType: application/vnd.docker.distribution.manifest.list.v2+json
Digest:    sha256:3183f7ce54d1efb44c34b84f428ae10aaf141e553c6b52a7ff44cc7083a05a66

Manifests:
  Name:      docker.io/moby/buildkit:master@sha256:667d28c9fb33820ce686887a717a148e89fa77f9097f9352996bbcce99d352b1
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/amd64

  Name:      docker.io/moby/buildkit:master@sha256:71789527b64ab3d7b3de01d364b449cd7f7a3da758218fbf73b9c9aae05a6775
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/arm/v7

  Name:      docker.io/moby/buildkit:master@sha256:fb64667e1ce6ab0d05478f3a8402af07b27737598dcf9a510fb1d792b13a66be
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/arm64

  Name:      docker.io/moby/buildkit:master@sha256:1c3ddf95a0788e23f72f25800c05abc4458946685e2b66788c3d978cde6da92b
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/s390x

  Name:      docker.io/moby/buildkit:master@sha256:05bcde6d460a284e5bc88026cd070277e8380355de3126cbc8fe8a452708c6b1
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/ppc64le

  Name:      docker.io/moby/buildkit:master@sha256:c04c57765304ab84f4f9807fff3e11605c3a60e16435c734b02c723680f6bd6e
  MediaType: application/vnd.docker.distribution.manifest.v2+json
  Platform:  linux/riscv64
docker buildx imagetools inspect crazymax/buildx:buildinfo --format "{{.BuildInfo}}"
Name: docker.io/crazymax/buildx:buildinfo
Frontend: dockerfile.v0
Attrs:
  filename:      Dockerfile
  source:        docker/dockerfile-upstream:master-labs
  build-arg:bar: foo
  build-arg:foo: bar
Sources:
  Type: docker-image
  Ref:  docker.io/docker/buildx-bin:0.6.1@sha256:a652ced4a4141977c7daaed0a074dcd9844a78d7d2615465b12f433ae6dd29f0
  Pin:  sha256:a652ced4a4141977c7daaed0a074dcd9844a78d7d2615465b12f433ae6dd29f0

  Type: docker-image
  Ref:  docker.io/library/alpine:3.13
  Pin:  sha256:026f721af4cf2843e07bba648e158fb35ecc876d822130633cc49f707f0fc88c

  Type: docker-image
  Ref:  docker.io/moby/buildkit:v0.9.0
  Pin:  sha256:8dc668e7f66db1c044aadbed306020743516a94848793e0f81f94a087ee78cab

  Type: docker-image
  Ref:  docker.io/tonistiigi/xx@sha256:21a61be4744f6531cb5f33b0e6f40ede41fa3a1b8c82d5946178f80cc84bfc04
  Pin:  sha256:21a61be4744f6531cb5f33b0e6f40ede41fa3a1b8c82d5946178f80cc84bfc04

  Type: http
  Ref:  https://raw.githubusercontent.com/moby/moby/master/README.md
  Pin:  sha256:419455202b0ef97e480d7f8199b26a721a417818bc0e2d106975f74323f25e6c

3）JSON输出

docker buildx imagetools inspect crazymax/loop --format "{{json .Manifest}}"
{
  "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
  "digest": "sha256:08602e7340970e92bde5e0a2e887c1fde4d9ae753d1e05efb4c8ef3b609f97f1",
  "size": 949
}

4）多平台镜像

docker buildx imagetools inspect --format '{{json (index .Image "linux/s390x")}}' moby/buildkit:master
{
  "created": "2022-02-25T17:13:27.89891722Z",
  "architecture": "s390x",
  "os": "linux",
  "config": {
    "Env": [
      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
    ],
    "Entrypoint": [
      "buildkitd"
    ],
    "Volumes": {
      "/var/lib/buildkit": {}
    }
  },
  "rootfs": {
    "type": "layers",
    "diff_ids": [
      "sha256:41048e32d0684349141cf05f629c5fc3c5915d1f3426b66dbb8953a540e01e1e",
      "sha256:2651209b9208fff6c053bc3c17353cb07874e50f1a9bc96d6afd03aef63de76a",
      "sha256:6741ed7e73039d853fa8902246a4c7e8bf9dd09652fd1b08251bc5f9e8876a7f",
      "sha256:92ac046adeeb65c86ae3f0b458dee04ad4a462e417661c04d77642c66494f69b"
    ]
  },
  "history": [
    {
      "created": "2021-11-24T20:41:23.709681315Z",
      "created_by": "/bin/sh -c #(nop) ADD file:cd24c711a2ef431b3ff94f9a02bfc42f159bc60de1d0eceecafea4e8af02441d in / "
    },
    {
      "created": "2021-11-24T20:41:23.94211262Z",
      "created_by": "/bin/sh -c #(nop)  CMD [\"/bin/sh\"]",
      "empty_layer": true
    },
    {
      "created": "2022-01-26T18:15:21.449825391Z",
      "created_by": "RUN /bin/sh -c apk add --no-cache fuse3 git openssh pigz xz   \u0026\u0026 ln -s fusermount3 /usr/bin/fusermount # buildkit",
      "comment": "buildkit.dockerfile.v0"
    },
    {
      "created": "2022-02-24T00:34:00.924540012Z",
      "created_by": "COPY examples/buildctl-daemonless/buildctl-daemonless.sh /usr/bin/ # buildkit",
      "comment": "buildkit.dockerfile.v0"
    },
    {
      "created": "2022-02-25T17:13:27.89891722Z",
      "created_by": "VOLUME [/var/lib/buildkit]",
      "comment": "buildkit.dockerfile.v0",
      "empty_layer": true
    },
    {
      "created": "2022-02-25T17:13:27.89891722Z",
      "created_by": "COPY / /usr/bin/ # buildkit",
      "comment": "buildkit.dockerfile.v0"
    },
    {
      "created": "2022-02-25T17:13:27.89891722Z",
      "created_by": "ENTRYPOINT [\"buildkitd\"]",
      "comment": "buildkit.dockerfile.v0",
      "empty_layer": true
    }
  ]
}

5）使用--raw选项打印未格式化的JSON

命令后使用jq来格式输出的结果。

docker buildx imagetools inspect --raw crazymax/loop | jq
{
  "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
  "schemaVersion": 2,
  "config": {
    "mediaType": "application/vnd.docker.container.image.v1+json",
    "digest": "sha256:7ace7d324e79b360b2db8b820d83081863d96d22e734cdf297a8e7fd83f6ceb3",
    "size": 2298
  },
  "layers": [
    {
      "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
      "digest": "sha256:5843afab387455b37944e709ee8c78d7520df80f8d01cf7f861aae63beeddb6b",
      "size": 2811478
    },
    {
      "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
      "digest": "sha256:726d3732a87e1c430d67e8969de6b222a889d45e045ebae1a008a37ba38f3b1f",
      "size": 1776812
    },
    {
      "mediaType": "application/vnd.docker.image.rootfs.diff.tar.gzip",
      "digest": "sha256:5d7cf9b33148a8f220c84f27dd2cfae46aca019a3ea3fbf7274f6d6dbfae8f3b",
      "size": 382855
    }
  ]
}

4、选项说明

名称, 简称

默认

描述

--format

{{.Manifest}}

使用给定的Go模板格式化输出

--raw

显示原始的、

未格式化的JSON清单

--builder

覆盖已配置的builder实例

5、子命令

命令

描述

docker buildx bake

从文件构建

docker buildx build

开始构建

docker buildx create

创建一个新的builder实例

docker buildx du

磁盘使用情况

docker buildx imagetools

在registry中处理镜像的命令

docker buildx inspect

查当前builder实例

docker buildx ls

列出 builder 实现

docker buildx prune

移除构建缓存

docker buildx rm

删除 builder 实现

docker buildx stop

停止 builder 实现

docker buildx use

设置当前 builder 实例

docker buildx version

显示buildx版本信息

6、父命令

命令

描述

docker buildx

Docker Buildx

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