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docker - 在 Google Cloud Build 上使用 Docker Buildkit

问题描述

我正在尝试在 Google Cloud Build 上将 BuildKit 与 Docker 一起使用，以便最终可以使用 --secret 标志。我使用Docker 的 Build Enhancements作为参考。

当我使用以下命令时，它可以在我的笔记本电脑上运行：DOCKER_BUILDKIT=1 docker build -t hello-world:latest .

当我在 Cloud Build 上运行它时，我收到错误“docker.io/docker/dockerfile:experimental not found”。

知道如何让它在 Cloud Build 上运行吗？

这是设置（注意：我还没有使用 --secret 标志）：

Dockerfile：

#syntax=docker/dockerfile:experimental

FROM node:10.15.3-alpine

RUN mkdir -p /usr/src/app && \
    apk add --no-cache tini

WORKDIR /usr/src/app

COPY package*.json ./

RUN npm install --production

COPY . .

RUN chown -R node:node .

USER node

EXPOSE 8080

ENTRYPOINT ["/sbin/tini", "--"]

CMD [ "node", "index.js" ]

cloudbuild.yaml：

steps:

  - id: 'Build'
    name: 'gcr.io/cloud-builders/docker'
    args: [
      'build',
      '-t', 'gcr.io/$PROJECT_ID/hello-world:latest',
      '.'
    ]
    env:
      - "DOCKER_BUILDKIT=1"

云构建日志：

starting build "xxxx"

FETCHSOURCE
Fetching storage object: gs://xxxxx
Copying gs://xxxxx...
/ [0 files][ 0.0 B/ 15.3 KiB] 
/ [1 files][ 15.3 KiB/ 15.3 KiB] 
Operation completed over 1 objects/15.3 KiB. 
BUILD
Already have image (with digest): gcr.io/cloud-builders/docker

#2 [internal] load .dockerignore
#2 digest: sha256:3ce0de94c925587ad30afb764af9bef89edeb62eb891b99694aedb086ee53f50
#2 name: "[internal] load .dockerignore"
#2 started: 2019-07-24 03:21:49.153855989 +0000 UTC
#2 completed: 2019-07-24 03:21:49.195969197 +0000 UTC
#2 duration: 42.113208ms
#2 transferring context: 230B done


#1 [internal] load build definition from Dockerfile
#1 digest: sha256:82b0dcd17330313705522448d60a78d4565304d55c86f55b903b18877d612601
#1 name: "[internal] load build definition from Dockerfile"
#1 started: 2019-07-24 03:21:49.150042849 +0000 UTC
#1 completed: 2019-07-24 03:21:49.189628322 +0000 UTC
#1 duration: 39.585473ms
#1 transferring dockerfile: 445B done


#3 resolve image config for docker.io/docker/dockerfile:experimental
#3 digest: sha256:401713457b113a88eb75a6554117f00c1e53f1a15beec44e932157069ae9a9a3
#3 name: "resolve image config for docker.io/docker/dockerfile:experimental"
#3 started: 2019-07-24 03:21:49.210803849 +0000 UTC
#3 completed: 2019-07-24 03:21:49.361743084 +0000 UTC
#3 duration: 150.939235ms
#3 error: "docker.io/docker/dockerfile:experimental not found"

docker.io/docker/dockerfile:experimental not found
ERROR
ERROR: build step 0 "gcr.io/cloud-builders/docker" failed: exit status 1

笔记本电脑 Docker 版本：

Client: Docker Engine - Community
 Version:           18.09.2
 API version:       1.39
 Go version:        go1.10.8
 Git commit:        6247962
 Built:             Sun Feb 10 04:12:39 2019
 OS/Arch:           darwin/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          18.09.2
  API version:      1.39 (minimum version 1.12)
  Go version:       go1.10.6
  Git commit:       6247962
  Built:            Sun Feb 10 04:13:06 2019
  OS/Arch:          linux/amd64
  Experimental:     false

云构建 Docker 版本：

Step #0 - "Version": Client:
Step #0 - "Version": Version: 18.09.7
Step #0 - "Version": API version: 1.39
Step #0 - "Version": Go version: go1.10.8
Step #0 - "Version": Git commit: 2d0083d
Step #0 - "Version": Built: Thu Jun 27 17:56:17 2019
Step #0 - "Version": OS/Arch: linux/amd64
Step #0 - "Version": Experimental: false
Step #0 - "Version": 
Step #0 - "Version": Server: Docker Engine - Community
Step #0 - "Version": Engine:
Step #0 - "Version": Version: 18.09.3
Step #0 - "Version": API version: 1.39 (minimum version 1.12)
Step #0 - "Version": Go version: go1.10.8
Step #0 - "Version": Git commit: 774a1f4
Step #0 - "Version": Built: Thu Feb 28 05:59:55 2019
Step #0 - "Version": OS/Arch: linux/amd64
Step #0 - "Version": Experimental: false

更新：我注意到我使用的是#syntax=docker/dockerfile:experimental，而链接的文章有#syntax=docker/dockerfile:1.0-experimental。使用 1.0-experimental 时出现同样的错误。

标签： dockergoogle-cloud-builddocker-buildkit

解决方案

当“registry-mirrors”选项与 buildkit 结合使用时似乎存在问题，然后 buildkit 前端图像无法获取：

https://github.com/moby/moby/issues/39120

在构建之前拉动它们似乎可以解决问题：

  - name: 'gcr.io/cloud-builders/docker'
    args: ['pull', 'docker/dockerfile:experimental']
  - name: 'gcr.io/cloud-builders/docker'
    args: ['pull', 'docker/dockerfile:1.0-experimental']

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