docker-build.yml

name: Docker Build and Push

on:
  push:
    branches:
      - main
    tags:
      - 'v*'

env:
  DOCKER_USERNAME: klinux
  BACKEND_IMAGE: klinux/velero-dashboard-backend
  FRONTEND_IMAGE: klinux/velero-dashboard-frontend

jobs:
  # ── Backend: build per-platform images in parallel ──────────────
  build-backend:
    name: Build Backend (${{ matrix.platform }})
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        platform: [linux/amd64, linux/arm64]
    steps:
      - name: Prepare platform pair
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - name: Checkout code
        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ env.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.BACKEND_IMAGE }}

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v7
        with:
          context: ./backend
          file: ./backend/Dockerfile
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.BACKEND_IMAGE }},push-by-digest=true,name-canonical=true,push=true
          cache-from: type=gha,scope=backend-${{ env.PLATFORM_PAIR }}
          cache-to: type=gha,mode=max,scope=backend-${{ env.PLATFORM_PAIR }}

      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v6
        with:
          name: backend-digests-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  # ── Backend: merge into multi-arch manifest ─────────────────────
  merge-backend:
    name: Merge Backend Manifest
    runs-on: ubuntu-latest
    needs: build-backend
    permissions:
      contents: read
      packages: write
    steps:
      - name: Download digests
        uses: actions/download-artifact@v7
        with:
          path: /tmp/digests
          pattern: backend-digests-*
          merge-multiple: true

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ env.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.BACKEND_IMAGE }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create \
            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.BACKEND_IMAGE }}@sha256:%s ' *)

      - name: Inspect image
        run: docker buildx imagetools inspect ${{ env.BACKEND_IMAGE }}:${{ steps.meta.outputs.version }}

  # ── Frontend: build per-platform images in parallel ─────────────
  build-frontend:
    name: Build Frontend (${{ matrix.platform }})
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    strategy:
      fail-fast: false
      matrix:
        platform: [linux/amd64, linux/arm64]
    steps:
      - name: Prepare platform pair
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - name: Checkout code
        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ env.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.FRONTEND_IMAGE }}

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v7
        with:
          context: ./frontend
          file: ./frontend/Dockerfile
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: type=image,name=${{ env.FRONTEND_IMAGE }},push-by-digest=true,name-canonical=true,push=true
          cache-from: type=gha,scope=frontend-${{ env.PLATFORM_PAIR }}
          cache-to: type=gha,mode=max,scope=frontend-${{ env.PLATFORM_PAIR }}

      - name: Export digest
        run: |
          mkdir -p /tmp/digests
          digest="${{ steps.build.outputs.digest }}"
          touch "/tmp/digests/${digest#sha256:}"

      - name: Upload digest
        uses: actions/upload-artifact@v6
        with:
          name: frontend-digests-${{ env.PLATFORM_PAIR }}
          path: /tmp/digests/*
          if-no-files-found: error
          retention-days: 1

  # ── Frontend: merge into multi-arch manifest ────────────────────
  merge-frontend:
    name: Merge Frontend Manifest
    runs-on: ubuntu-latest
    needs: build-frontend
    permissions:
      contents: read
      packages: write
    steps:
      - name: Download digests
        uses: actions/download-artifact@v7
        with:
          path: /tmp/digests
          pattern: frontend-digests-*
          merge-multiple: true

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ env.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.FRONTEND_IMAGE }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha
            type=raw,value=latest,enable={{is_default_branch}}

      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create \
            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.FRONTEND_IMAGE }}@sha256:%s ' *)

      - name: Inspect image
        run: docker buildx imagetools inspect ${{ env.FRONTEND_IMAGE }}:${{ steps.meta.outputs.version }}