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Cache backend API example
Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
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‎.github/workflows/ci.yml‎

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@@ -70,9 +70,6 @@ jobs:
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name: Inspect
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run: |
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docker buildx imagetools inspect localhost:5000/name/app:1.0.0
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-
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name: Image digest
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run: echo ${{ steps.docker_build.outputs.digest }}
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-
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name: Check digest
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run: |
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name: Inspect
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run: |
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docker buildx imagetools inspect localhost:5000/name/app:1.0.0
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-
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name: Image digest
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run: echo ${{ steps.docker_build.outputs.digest }}
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-
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name: Check digest
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run: |
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name: Inspect
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run: |
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docker buildx imagetools inspect localhost:5000/name/app:1.0.0
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-
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name: Image digest
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run: echo ${{ steps.docker_build.outputs.digest }}
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-
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name: Check digest
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run: |
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name: Inspect
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run: |
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docker buildx imagetools inspect localhost:5000/name/app:1.0.0
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-
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name: Image digest
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run: echo ${{ steps.docker_build.outputs.digest }}
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-
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name: Check digest
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run: |
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name: Inspect (1)
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run: |
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docker buildx imagetools inspect localhost:5000/name/app:latest
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-
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name: Image digest (1)
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run: echo ${{ steps.docker_build.outputs.digest }}
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-
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name: Check digest (1)
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run: |
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name: Inspect (2)
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run: |
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docker buildx imagetools inspect localhost:5000/name/app:latest
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name: Image digest (2)
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run: echo ${{ steps.docker_build2.outputs.digest }}
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-
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name: Check digest (2)
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run: |
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if: always()
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uses: crazy-max/ghaction-dump-context@v1
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github-cache-first:
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local-cache-first:
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runs-on: ubuntu-latest
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outputs:
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digest: ${{ steps.docker_build.outputs.digest }}
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uses: actions/cache@v2
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with:
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path: /tmp/.buildx-cache
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key: ${{ runner.os }}-buildx-ghcache-${{ github.sha }}
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key: ${{ runner.os }}-buildx-local-${{ github.sha }}
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restore-keys: |
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${{ runner.os }}-buildx-ghcache-
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-
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name: Inspect
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run: |
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docker buildx imagetools inspect localhost:5000/name/app:1.0.0
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-
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name: Image digest
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run: echo ${{ steps.docker_build.outputs.digest }}
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-
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name: Check digest
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run: |
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if: always()
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uses: crazy-max/ghaction-dump-context@v1
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github-cache-hit:
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local-cache-hit:
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runs-on: ubuntu-latest
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needs: github-cache-first
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needs: local-cache-first
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services:
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registry:
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image: registry:2
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id: cache
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with:
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path: /tmp/.buildx-cache
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key: ${{ runner.os }}-buildx-ghcache-${{ github.sha }}
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key: ${{ runner.os }}-buildx-local-${{ github.sha }}
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restore-keys: |
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${{ runner.os }}-buildx-ghcache-
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-
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name: Inspect
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run: |
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docker buildx imagetools inspect localhost:5000/name/app:1.0.0
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-
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name: Image digest
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run: echo ${{ steps.docker_build.outputs.digest }}
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name: Check digest
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run: |
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-
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name: Compare digests
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run: |
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echo Compare "${{ needs.github-cache-first.outputs.digest }}" with "${{ steps.docker_build.outputs.digest }}"
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if [ "${{ needs.github-cache-first.outputs.digest }}" != "${{ steps.docker_build.outputs.digest }}" ]; then
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echo Compare "${{ needs.local-cache-first.outputs.digest }}" with "${{ steps.docker_build.outputs.digest }}"
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if [ "${{ needs.local-cache-first.outputs.digest }}" != "${{ steps.docker_build.outputs.digest }}" ]; then
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echo "::error::Digests should be identical"
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exit 1
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fi
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name: Dump context
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if: always()
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uses: crazy-max/ghaction-dump-context@v1
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github-cache:
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runs-on: ubuntu-latest
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strategy:
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fail-fast: false
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matrix:
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buildx_version:
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- ""
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- latest
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services:
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registry:
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image: registry:2
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ports:
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- 5000:5000
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steps:
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-
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name: Checkout
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uses: actions/checkout@v2
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-
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name: Set up QEMU
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uses: docker/setup-qemu-action@v1
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-
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name: Set up Docker Buildx
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uses: docker/setup-buildx-action@v1
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with:
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version: ${{ matrix.buildx_version }}
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driver-opts: |
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network=host
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buildkitd-flags: --debug
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-
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name: Build and push
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uses: ./
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with:
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context: ./test
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file: ./test/multi.Dockerfile
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platforms: linux/amd64,linux/arm64
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push: true
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tags: |
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localhost:5000/name/app:latest
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localhost:5000/name/app:1.0.0
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cache-from: type=gha,scope=ci-${{ matrix.buildx_version }}
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cache-to: type=gha,scope=ci-${{ matrix.buildx_version }}
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-
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name: Inspect
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run: |
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docker buildx imagetools inspect localhost:5000/name/app:1.0.0
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-
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name: Dump context
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if: always()
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uses: crazy-max/ghaction-dump-context@v1

‎README.md‎

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* [Push to multi-registries](docs/advanced/push-multi-registries.md)
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* [Copy between registries](docs/advanced/copy-between-registries.md)
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* [Cache](docs/advanced/cache.md)
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* [Registry cache](docs/advanced/cache.md#registry-cache)
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* [GitHub cache](docs/advanced/cache.md#github-cache)
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* [Local registry](docs/advanced/local-registry.md)
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* [Export image to Docker](docs/advanced/export-docker.md)
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* [Share built image between jobs](docs/advanced/share-image-jobs.md)
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with:
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push: true
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tags: user/app:latest
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-
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name: Image digest
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run: echo ${{ steps.docker_build.outputs.digest }}
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```
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Building from the current repository automatically uses the [GitHub Token](https://help.github.com/en/actions/configuring-and-managing-workflows/authenticating-with-the-github_token)
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* [Push to multi-registries](docs/advanced/push-multi-registries.md)
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* [Copy between registries](docs/advanced/copy-between-registries.md)
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* [Cache](docs/advanced/cache.md)
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* [Registry cache](docs/advanced/cache.md#registry-cache)
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* [GitHub cache](docs/advanced/cache.md#github-cache)
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* [Local registry](docs/advanced/local-registry.md)
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* [Export image to Docker](docs/advanced/export-docker.md)
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* [Share built image between jobs](docs/advanced/share-image-jobs.md)

‎docs/advanced/cache.md‎

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# Cache
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* [Inline cache](#inline-cache)
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* [Registry cache](#registry-cache)
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* [GitHub cache](#github-cache)
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* [Cache backend API](#cache-backend-api)
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* [Local cache](#local-cache)
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> More info about buildx cache: https://github.com/docker/buildx/blob/master/docs/reference/buildx_build.md#cache-from
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> More info about cache on [BuildKit](https://github.com/moby/buildkit#export-cache) and [Buildx](https://github.com/docker/buildx/blob/master/docs/reference/buildx_build.md#cache-from) repositories.
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## Registry cache
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## Inline cache
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You can import/export cache from a cache manifest or (special) image configuration on the registry.
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In most case you want to use the [`type=inline` cache exporter](https://github.com/moby/buildkit#inline-push-image-and-cache-together).
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However, note that the `inline` cache exporter only supports `min` cache mode. To enable `max` cache mode, push the
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image and the cache separately by using the `registry` cache exporter as shown in the [next example](#registry-cache).
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```yaml
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name: ci
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cache-to: type=inline
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```
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## Registry cache
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You can import/export cache from a cache manifest or (special) image configuration on the registry with the
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[`type=registry` cache exporter](https://github.com/crazy-max/buildkit/tree/cache-docs#registry-push-image-and-cache-separately).
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```yaml
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name: ci
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on:
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push:
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branches:
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- 'master'
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jobs:
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docker:
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runs-on: ubuntu-latest
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steps:
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-
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name: Checkout
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uses: actions/checkout@v2
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-
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name: Set up Docker Buildx
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uses: docker/setup-buildx-action@v1
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-
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name: Login to DockerHub
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uses: docker/login-action@v1
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with:
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username: ${{ secrets.DOCKERHUB_USERNAME }}
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password: ${{ secrets.DOCKERHUB_TOKEN }}
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-
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name: Build and push
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uses: docker/build-push-action@v2
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with:
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context: .
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push: true
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tags: user/app:latest
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cache-from: type=registry,ref=user/app:buildcache
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cache-to: type=registry,ref=user/app:buildcache,mode=max
90+
```
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## GitHub cache
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### Cache backend API
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> :test_tube: This cache exporter is considered EXPERIMENTAL until further notice. Please provide feedback on
97+
> [BuildKit repository](https://github.com/moby/buildkit) if you encounter any issues.
98+
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Since [buildx 0.6.0](https://github.com/docker/buildx/releases/tag/v0.6.0) and [BuildKit 0.9.0](https://github.com/moby/buildkit/releases/tag/v0.9.0),
100+
you can use the [`type=gha` cache exporter](https://github.com/moby/buildkit/tree/master#github-actions-cache-experimental).
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GitHub Actions cache exporter backend uses the [GitHub Cache API](https://github.com/tonistiigi/go-actions-cache/blob/master/api.md)
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to fetch and upload cache blobs. That's why this type of cache should be exclusively used in a GitHub Action workflow
104+
as the `url` (`$ACTIONS_CACHE_URL`) and `token` (`$ACTIONS_RUNTIME_TOKEN`) attributes are populated when a workflow
105+
is started.
106+
107+
```yaml
108+
name: ci
109+
110+
on:
111+
push:
112+
branches:
113+
- 'master'
114+
115+
jobs:
116+
docker:
117+
runs-on: ubuntu-latest
118+
steps:
119+
-
120+
name: Checkout
121+
uses: actions/checkout@v2
122+
-
123+
name: Set up Docker Buildx
124+
uses: docker/setup-buildx-action@v1
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-
126+
name: Login to DockerHub
127+
uses: docker/login-action@v1
128+
with:
129+
username: ${{ secrets.DOCKERHUB_USERNAME }}
130+
password: ${{ secrets.DOCKERHUB_TOKEN }}
131+
-
132+
name: Build and push
133+
uses: docker/build-push-action@v2
134+
with:
135+
context: .
136+
push: true
137+
tags: user/app:latest
138+
cache-from: type=gha
139+
cache-to: type=gha,mode=max
140+
```
141+
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### Local cache
143+
49144
> :warning: At the moment caches are copied over the existing cache so it [keeps growing](https://github.com/docker/build-push-action/issues/252).
50145
> The `Move cache` step is used as a temporary fix (see https://github.com/moby/buildkit/issues/1896).
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52-
> :rocket: There is a new cache backend using GitHub cache being developed that will lighten your workflow.
53-
> More info: https://github.com/docker/buildx/pull/535
54-
55-
You can leverage [GitHub cache](https://docs.github.com/en/actions/configuring-and-managing-workflows/caching-dependencies-to-speed-up-workflows)
56-
using [actions/cache](https://github.com/actions/cache) with this action:
147+
You can also leverage [GitHub cache](https://docs.github.com/en/actions/configuring-and-managing-workflows/caching-dependencies-to-speed-up-workflows)
148+
using [actions/cache](https://github.com/actions/cache) and [`type=local` cache exporter](https://github.com/moby/buildkit#local-directory-1)
149+
with this action:
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58151
```yaml
59152
name: ci
@@ -95,7 +188,7 @@ jobs:
95188
push: true
96189
tags: user/app:latest
97190
cache-from: type=local,src=/tmp/.buildx-cache
98-
cache-to: type=local,dest=/tmp/.buildx-cache-new
191+
cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max
99192
-
100193
# Temp fix
101194
# https://github.com/docker/build-push-action/issues/252

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