github workflow: build docker alpine image

.github/workflows/osrm-backend-docker.yml

@@ -80,5 +80,34 @@ jobs:
           build-args: |
             DOCKER_TAG=${{ join(steps.meta.outputs.tags ) }}            
 
+      - name: Build container alpine image - debug
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          platforms: linux/amd64,linux/arm64
+          file: ./docker/Dockerfile-alpine
+          tags: ${{ steps.metadebug.outputs.tags  }}
+          build-args: |
+            DOCKER_TAG=${{ join(steps.metadebug.outputs.tags ) }}-alpine
 
-            
+
+      - name: Build container alpine image - assertions
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          platforms: linux/amd64,linux/arm64
+          file: ./docker/Dockerfile-alpine
+          tags: ${{ steps.metaassertions.outputs.tags  }}
+          build-args: |
+            DOCKER_TAG=${{ join(steps.metaassertions.outputs.tags ) }}-alpine
+
+      # build and publish "normal" image as last to get it listed on top
+      - name: Build container alpine image - normal
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          platforms: linux/amd64,linux/arm64
+          file: ./docker/Dockerfile-alpine
+          tags:  ${{ steps.meta.outputs.tags  }}
+          build-args: |
+            DOCKER_TAG=${{ join(steps.meta.outputs.tags ) }}-alpine

.github/workflows/osrm-backend.yml

@@ -159,6 +159,49 @@ jobs:
           curl --retry-delay 3 --retry 10 --retry-all-errors "http://127.0.0.1:5000/route/v1/driving/13.388860,52.517037;13.385983,52.496891?steps=true"
           docker stop osrm-container
 
+  docker-alpine-image:
+    needs: format-taginfo-docs
+    runs-on: ubuntu-22.04
+    continue-on-error: false
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v4
+      - name: Enable osm.pbf cache
+        uses: actions/cache@v4
+        with:
+          path: berlin-latest.osm.pbf
+          key: v1-berlin-osm-pbf
+          restore-keys: |
+            v1-berlin-osm-pbf
+      - name: Docker alpine build
+        run: |
+          docker build -t osrm-backend-local -f docker/Dockerfile-alpine .
+      - name: Test Docker alpine image
+        run: |
+          if [ ! -f "${PWD}/berlin-latest.osm.pbf" ]; then
+            wget http://download.geofabrik.de/europe/germany/berlin-latest.osm.pbf
+          fi
+          TAG=osrm-backend-local
+          # when `--memory-swap` value equals `--memory` it means container won't use swap
+          # see https://docs.docker.com/config/containers/resource_constraints/#--memory-swap-details
+          MEMORY_ARGS="--memory=1g --memory-swap=1g"
+          docker run $MEMORY_ARGS -t -v "${PWD}:/data" "${TAG}" osrm-extract --dump-nbg-graph -p /opt/car.lua /data/berlin-latest.osm.pbf
+          docker run $MEMORY_ARGS -t -v "${PWD}:/data" "${TAG}" osrm-components /data/berlin-latest.osrm.nbg /data/berlin-latest.geojson
+          if [ ! -s "${PWD}/berlin-latest.geojson" ]
+          then
+            >&2 echo "No berlin-latest.geojson found"
+            exit 1
+          fi
+
+          # removing `.osrm.nbg` to check that whole pipeline works without it
+          rm -rf "${PWD}/berlin-latest.osrm.nbg"
+
+          docker run $MEMORY_ARGS -t -v "${PWD}:/data" "${TAG}" osrm-partition /data/berlin-latest.osrm
+          docker run $MEMORY_ARGS -t -v "${PWD}:/data" "${TAG}" osrm-customize /data/berlin-latest.osrm
+          docker run $MEMORY_ARGS --name=osrm-container -t -p 5000:5000 -v "${PWD}:/data" "${TAG}" osrm-routed --algorithm mld /data/berlin-latest.osrm &
+          curl --retry-delay 3 --retry 10 --retry-all-errors "http://127.0.0.1:5000/route/v1/driving/13.388860,52.517037;13.385983,52.496891?steps=true"
+          docker stop osrm-container
+
   build-test-publish:
     needs: format-taginfo-docs
     strategy: