Publish sample plugin container images

.dockerignore

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+build/

.github/workflows/images.yml

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+name: Publish Container Images
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - v[0-9]+.[0-9]+.[0-9]+
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build-and-push:
+    name: Build and Push (${{ matrix.image }})
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        image: [
+          device-injector,
+          differ,
+          hook-injector,
+          logger,
+          network-device-injector,
+          network-logger,
+          template,
+          ulimit-adjuster,
+          v010-adapter,
+        ]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to registry
+        if: github.event_name == 'push'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Determine image tag name
+        id: tag
+        run: |
+          if [ "${{ github.ref_type }}" = "tag" ]; then
+              tag="${{ github.ref_name }}"
+          else
+              if [ "${{ github.event_name }}" = "pull_request" ]; then
+                  tag="pr-${{ github.event.pull_request.number }}"
+              else
+                  case "${{ github.ref_name }}" in
+                      main)
+                          tag="unstable"
+                          ;;
+                  esac
+              fi
+          fi
+          if [ -z "$tag" ]; then
+              echo "ERROR: failed to determine image tag"
+              exit 1
+          fi
+          echo "TAG_NAME=$tag" >> $GITHUB_ENV
+
+      - name: Build and push image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./plugins/Dockerfile
+          build-args: |
+            PLUGIN=${{ matrix.image }}
+          push: ${{ github.event_name == 'push' }}
+          platforms: ${{ github.event_name == 'push' && 'linux/amd64,linux/arm64' || 'linux/amd64' }}
+          tags: ghcr.io/${{ github.repository }}/plugins/${{ matrix.image }}:${{ env.TAG_NAME }}

plugins/Dockerfile

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+#   Copyright The containerd Authors.
+
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+
+#       http://www.apache.org/licenses/LICENSE-2.0
+
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+ARG GO_VERSION=1.24
+
+FROM golang:${GO_VERSION}-bullseye AS builder
+ARG PLUGIN
+
+WORKDIR /go/src
+
+# Cache dependencies in a separate layer
+COPY go.mod go.sum .
+RUN --mount=type=cache,target=/go/pkg/mod/ go mod download
+
+# Build
+COPY . .
+
+RUN --mount=type=cache,target=/go/pkg/mod/ \
+    make /go/src/build/bin/${PLUGIN} \
+    GO_BUILD="CGO_ENABLED=0 go build -ldflags '-extldflags=-static'"
+
+# Construct final image
+FROM scratch
+ARG PLUGIN
+
+COPY --from=builder /go/src/build/bin/${PLUGIN} /bin/plugin
+
+ENV NRI_PLUGIN_NAME=${PLUGIN}
+
+ENTRYPOINT ["/bin/plugin"]