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Merge pull request #455 from crazy-max/doc
Test before pushing your image (docs)
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@ -36,6 +36,7 @@ ___
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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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* [Test your image before pushing it](docs/advanced/test-before-push.md)
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* [Handle tags and labels](docs/advanced/tags-labels.md)
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* [Update DockerHub repo description](docs/advanced/dockerhub-desc.md)
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* [Customizing](#customizing)
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@ -165,6 +166,7 @@ jobs:
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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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* [Test your image before pushing it](docs/advanced/test-before-push.md)
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* [Handle tags and labels](docs/advanced/tags-labels.md)
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* [Update DockerHub repo description](docs/advanced/dockerhub-desc.md)
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docs/advanced/test-before-push.md
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docs/advanced/test-before-push.md
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# Test your image before pushing it
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In some cases, you might want to validate that the image works as expected
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before pushing it.
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The workflow below will be composed of several steps to achieve this:
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* Build and export the image to Docker
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* Test your image
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* Multi-platform build and push the image
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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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env:
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TEST_TAG: user/myapp:test
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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 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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-
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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 export to Docker
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uses: docker/build-push-action@v2
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with:
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context: .
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load: true
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tags: ${{ env.TEST_TAG }}
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-
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name: Test
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run: |
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docker run --rm ${{ env.TEST_TAG }}
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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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platforms: linux/amd64,linux/arm64
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push: true
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tags: user/app:latest
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```
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> :bulb: Build time will not be increased with this workflow because internal
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> cache for `linux/amd64` will be used from previous step on `Build and push`
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> step so only `linux/arm64` will be actually built.
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