Dockerfile: smoke tests for static builds

Adds smoke test stage in our Dockerfile and a
GitHub Action workflow

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

.github/workflows/test.yml

@@ -502,3 +502,55 @@ jobs:
         name: Create summary
         run: |
           teststat -markdown $(find /tmp/reports -type f -name '*.json' -print0 | xargs -0) >> $GITHUB_STEP_SUMMARY
+
+  prepare-smoke:
+    runs-on: ubuntu-20.04
+    needs:
+      - validate-dco
+    outputs:
+      matrix: ${{ steps.platforms.outputs.matrix }}
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Create matrix
+        id: platforms
+        run: |
+          matrix="$(docker buildx bake binary-smoketest --print | jq -cr '.target."binary-smoketest".platforms')"
+          echo "matrix=$matrix" >> $GITHUB_OUTPUT
+      -
+        name: Show matrix
+        run: |
+          echo ${{ steps.platforms.outputs.matrix }}
+
+  smoke:
+    runs-on: ubuntu-20.04
+    needs:
+      - prepare-smoke
+    strategy:
+      fail-fast: false
+      matrix:
+        platform: ${{ fromJson(needs.prepare-smoke.outputs.matrix) }}
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Prepare
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      -
+        name: Test
+        uses: docker/bake-action@v2
+        with:
+          targets: binary-smoketest
+          set: |
+            *.platform=${{ matrix.platform }}

Dockerfile

@@ -619,6 +619,20 @@ COPY --from=containerutil /build/ /
 COPY --from=vpnkit        /       /
 COPY --from=build         /build  /
 
+# smoke tests
+# usage:
+# > docker buildx bake binary-smoketest
+FROM --platform=$TARGETPLATFORM base AS smoketest
+WORKDIR /usr/local/bin
+COPY --from=build /build .
+RUN <<EOT
+  set -ex
+  file dockerd
+  dockerd --version
+  file docker-proxy
+  docker-proxy --version
+EOT
+
 # usage:
 # > make shell
 # > SYSTEMD=true make shell

docker-bake.hcl

@@ -124,6 +124,20 @@ target "binary-cross" {
   inherits = ["binary", "_platforms"]
 }
 
+target "binary-smoketest" {
+  inherits = ["_common"]
+  target = "smoketest"
+  output = ["type=cacheonly"]
+  platforms = [
+    "linux/amd64",
+    "linux/arm/v6",
+    "linux/arm/v7",
+    "linux/arm64",
+    "linux/ppc64le",
+    "linux/s390x"
+  ]
+}
+
 #
 # same as binary but with extra tools as well (containerd, runc, ...)
 #