180 lines
7.1 KiB
YAML
180 lines
7.1 KiB
YAML
name: Build container image
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on:
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pull_request:
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branches:
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- main
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schedule:
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- cron: '05 12 * * 2,5'
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workflow_dispatch:
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env:
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IMAGE_DESC: "Custom Fedora bootc image"
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IMAGE_NAME: "${{ github.event.repository.name }}"
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DEFAULT_TAG: "stable"
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concurrency:
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group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
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cancel-in-progress: true
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jobs:
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build_push:
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name: Build and push image
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runs-on: ubuntu-24.04
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permissions:
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contents: read
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packages: write
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id-token: write
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steps:
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- name: Prepare environment
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run: |
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REGISTRY_HOST=$(echo "${{ github.server_url }}" | awk -F/ '{print $3}')
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OWNER_LOWER="${{ github.repository_owner }}"
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NAME_LOWER="${{ env.IMAGE_NAME }}"
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echo "REGISTRY_HOST=${REGISTRY_HOST}" >> ${GITHUB_ENV}
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echo "IMAGE_REGISTRY=${REGISTRY_HOST}/${OWNER_LOWER,,}" >> ${GITHUB_ENV}
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echo "IMAGE_NAME=${NAME_LOWER,,}" >> ${GITHUB_ENV}
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- name: Determine image tag
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run: |
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BRANCH="${GITHUB_REF_NAME}"
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if [[ "$BRANCH" == "main" ]]; then
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echo "IMAGE_TAG=${DEFAULT_TAG}" >> ${GITHUB_ENV}
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echo "IS_TEST_BUILD=false" >> ${GITHUB_ENV}
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else
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SANITIZED=$(echo "$BRANCH" | sed 's/[^a-zA-Z0-9._-]/-/g' | head -c 50)
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echo "IMAGE_TAG=test-${SANITIZED}" >> ${GITHUB_ENV}
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echo "IS_TEST_BUILD=true" >> ${GITHUB_ENV}
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fi
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- name: Checkout
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uses: actions/checkout@v4.2.2
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- name: Image Metadata
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id: metadata
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uses: docker/metadata-action@v5.7.0
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with:
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images: ${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAME }}
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tags: |
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type=raw,value=${{ env.IMAGE_TAG }}
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type=raw,value=${{ env.IMAGE_TAG }}.{{date 'YYYYMMDD'}},enable=${{ env.IS_TEST_BUILD == 'false' }}
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type=raw,value={{date 'YYYYMMDD'}},enable=${{ env.IS_TEST_BUILD == 'false' }}
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type=sha,enable=${{ github.event_name == 'pull_request' }}
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type=ref,event=pr
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labels: |
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org.opencontainers.image.created={{date 'YYYY-MM-DDTHH:mm:ssZ'}}
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org.opencontainers.image.description=${{ env.IMAGE_DESC }}
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org.opencontainers.image.documentation=${{ github.server_url }}/${{ github.repository }}//raw/commit/${{ github.sha }}/README.md
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org.opencontainers.image.source=${{ github.server_url }}/${{ github.repository }}/src/commit/${{ github.sha }}/Containerfile
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org.opencontainers.image.title=${{ env.IMAGE_NAME }}
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org.opencontainers.image.url=${{ github.server_url }}/${{ github.repository }}
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org.opencontainers.image.vendor=${{ github.repository_owner }}
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org.opencontainers.image.version=${{ env.IMAGE_TAG }}.{{date 'YYYYMMDD'}}
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containers.bootc=1
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ostree.bootable=1
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- name: Build and Push Image (Buildah unprivileged)
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id: build_image
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run: |
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# Metadaten in Dateien schreiben, damit sie im Tar-Stream landen
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cat << 'EOF' > labels.txt
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${{ steps.metadata.outputs.labels }}
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EOF
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cat << 'EOF' > tags.txt
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${{ steps.metadata.outputs.tags }}
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EOF
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# Buildah-Container starten und Image im RAM-Dateisystem bauen
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BUILD_OUTPUT=$(tar -cf - . | docker run -i --rm \
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--cap-add=SYS_ADMIN \
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--security-opt seccomp=unconfined \
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--security-opt apparmor=unconfined \
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--security-opt label=disable \
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--tmpfs /var/lib/containers:exec \
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--ulimit nofile=1048576:1048576 \
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quay.io/buildah/stable:latest \
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bash -c '
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mkdir /src && tar -xf - -C /src
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# Labels sauber in ein Bash-Array einlesen (verhindert Escaping-Fehler)
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declare -a LABEL_ARGS
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while IFS= read -r line || [ -n "$line" ]; do
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[ -z "$line" ] && continue
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LABEL_ARGS+=("--label" "$line")
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done < /src/labels.txt
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FIRST_TAG=$(head -n 1 /src/tags.txt)
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# 1. Image mit den dynamischen OCI-Labels bauen
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buildah --storage-driver=vfs --isolation=chroot bud \
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"${LABEL_ARGS[@]}" \
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-t "$FIRST_TAG" \
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-f /src/Containerfile /src
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# 2. Wenn kein PR, direkt aus Buildah in die Gitea-Registry pushen
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if [ "${{ github.event_name }}" != "pull_request" ]; then
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PUSH_OUT=$(buildah --storage-driver=vfs push --creds "${{ github.repository_owner }}:${{ secrets.REGISTRY }}" "$FIRST_TAG" "docker://$FIRST_TAG")
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echo "$PUSH_OUT"
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# Alle weiteren von metadata-action generierten Tags pushen
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while IFS= read -r tag || [ -n "$tag" ]; do
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[ -z "$tag" ] && continue
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if [ "$tag" != "$FIRST_TAG" ]; then
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buildah --storage-driver=vfs tag "$FIRST_TAG" "$tag"
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buildah --storage-driver=vfs push --creds "${{ github.repository_owner }}:${{ secrets.REGISTRY }}" "$tag" "docker://$tag"
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fi
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done < /src/tags.txt
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# Den echten Image-Digest aus den Push-Logs für Cosign extrahieren
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DIGEST=$(echo "$PUSH_OUT" | grep -oE "sha256:[a-f0-9]{64}" | tail -n 1)
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echo "CONTAINER_DIGEST=${DIGEST}"
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fi
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')
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# Log-Ausgabe für das Gitea Actions UI
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echo "$BUILD_OUTPUT"
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# Digest an den Runner-Schritt übergeben, falls gepusht wurde
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if [ "${{ github.event_name }}" != "pull_request" ]; then
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IMAGE_DIGEST=$(echo "$BUILD_OUTPUT" | grep "CONTAINER_DIGEST=" | cut -d= -f2)
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echo "digest=${IMAGE_DIGEST}" >> $GITHUB_OUTPUT
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fi
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- name: Install gettext (provides envsubst)
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if: github.event_name != 'pull_request' && env.IS_TEST_BUILD == 'false'
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run: |
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sudo apt-get update
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sudo apt-get install -y gettext
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- name: Install Cosign via official Action
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if: github.event_name != 'pull_request' && env.IS_TEST_BUILD == 'false'
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uses: sigstore/cosign-installer@v4.1.2
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- name: Sign container image
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if: github.event_name != 'pull_request' && env.IS_TEST_BUILD == 'false'
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env:
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COSIGN_PRIVATE_KEY: ${{ secrets.SIGNING_SECRET }}
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COSIGN_PASSWORD: ""
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run: |
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# 1. Cosign an der Gitea-Registry anmelden
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cosign login "${{ env.REGISTRY_HOST }}" -u "${{ github.repository_owner }}" -p "${{ secrets.REGISTRY }}"
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# 2. Den reinen Digest aus dem Buildah-Schritt holen
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IMAGE_DIGEST="${{ steps.build_image.outputs.digest }}"
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IMAGE_REF="${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_NAME }}@${IMAGE_DIGEST}"
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echo "Signiere exklusiv via Digest: ${IMAGE_REF}"
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# 3. Signierung ausführen
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cosign sign -y \
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--key env://COSIGN_PRIVATE_KEY \
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--use-signing-config=false \
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--new-bundle-format=false \
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--tlog-upload=false \
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--registry-referrers-mode=legacy \
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"${IMAGE_REF}"
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