parallelization

.github/workflows/apache.yml

@@ -0,0 +1,103 @@
+name: build on change
+
+on: 
+  push:
+    branches:
+      - master
+      - main
+  workflow_dispatch:
+  repository_dispatch:
+    types: apache
+
+jobs:
+  compare:
+    runs-on: ubuntu-latest
+    outputs:
+      flag: ${{ steps.set-flag.outputs.flag }}
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [amd64, arm, arm64]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Log in to the Container registries
+        run: |
+          docker login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
+          docker login docker.io -u ${{ secrets.DOCKERUSERNAME }} -p ${{ secrets.DOCKERAPIKEY }}
+      - name: Compare images for changes
+        id: set-flag
+        run: |
+          export DOCKER_CLI_EXPERIMENTAL=enabled
+          repo="treehouses/apache-tags:${{ matrix.arch }}"
+          base="treehouses/debian-tags:${{ matrix.arch }}"
+          docker pull -q $base &>/dev/null
+          docker pull -q $repo &>/dev/null
+          basesha=$(docker image inspect $base | jq --raw-output '.[0].RootFS.Layers|.[]')
+          reposha=$(docker image inspect $repo | jq --raw-output '.[0].RootFS.Layers|.[]')
+          echo "base sha:$basesha repo sha:$reposha"
+          [[ $reposha == *$basesha* ]] && echo "no changes" || echo "::set-output name=flag::true"
+  images:
+    needs: compare
+    runs-on: ubuntu-latest
+    outputs:
+      build: ${{ steps.set-build.outputs.build }}
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [amd64, arm, arm64]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Log in to the Container registries
+        run: |
+          docker login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
+          docker login docker.io -u ${{ secrets.DOCKERUSERNAME }} -p ${{ secrets.DOCKERAPIKEY }}
+
+      - name: Build docker image
+        if: ${{ needs.compare.outputs.flag }}
+        id: set-build
+        run: |
+          export DOCKER_CLI_EXPERIMENTAL=enabled
+          echo "**************0*************"
+          base="treehouses/debian-tags:${{ matrix.arch }}"
+          repo="treehouses/apache-tags:${{ matrix.arch }}"
+          date="$(date +%Y%m%d%H%M)"
+          docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+          docker build -t ghcr.io/$repo --build-arg BASE=$base . 
+          docker tag ghcr.io/$repo docker.io/$repo
+          docker tag ghcr.io/$repo ghcr.io/$repo-$date
+          docker tag docker.io/$repo docker.io/$repo-$date
+          docker push ghcr.io/$repo
+          docker push docker.io/$repo
+          docker push ghcr.io/$repo-$date
+          docker push docker.io/$repo-$date
+          docker images
+          echo "::set-output name=build::true"
+  manifests:
+    needs: images
+    strategy:
+      fail-fast: false
+      matrix:
+        registry: [docker.io, ghcr.io]
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Log in to the Container registries
+        run: |
+          docker login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
+          docker login docker.io -u ${{ secrets.DOCKERUSERNAME }} -p ${{ secrets.DOCKERAPIKEY }}
+      - name: Deploying manifest to Container Registries
+        if: ${{ needs.images.outputs.build }}
+        run: |
+          repo="${{ matrix.registry }}/treehouses/apache"
+          date="$(date +%Y%m%d%H%M)"
+          docker manifest create $repo:latest $repo-tags:amd64 $repo-tags:arm $repo-tags:arm64
+          docker manifest create $repo:$date $repo-tags:amd64 $repo-tags:arm $repo-tags:arm64
+          docker manifest annotate $repo:latest $repo-tags:arm --os linux --arch arm 
+          docker manifest annotate $repo:$date $repo-tags:arm --os linux --arch arm 
+          docker manifest inspect $repo:latest
+          docker manifest push $repo:latest
+          docker manifest push $repo:$date

Dockerfile.template → Dockerfile

@@ -1,4 +1,5 @@
-FROM {{base_image}}
+ARG BASE=
+FROM ${BASE}
 
 RUN apt-get update -y   && apt-get install -y apache2