Merge pull request #86 from valkey-io/aiven-sal/cache

ci: cache docker layers and avoid re-downloading them for each job

.github/workflows/integration.yaml

@@ -50,8 +50,29 @@ jobs:
            pip install -r dev_requirements.txt
            invoke linters
 
+   populate-cache:
+     runs-on: ubuntu-latest
+     timeout-minutes: 60
+     name: Update docker cache
+     steps:
+       - uses: actions/checkout@v4
+       - name: Cache docker images
+         id: custom-cache
+         uses: actions/cache@v3
+         with:
+           path: ./custom-cache/
+           key: custom-cache
+       - if: ${{ steps.custom-cache.outputs.cache-hit != 'true' || github.event_name == 'schedule' }}
+         name: Update Cache
+         run: |
+           mkdir -p ./custom-cache/
+           docker compose --profile all build
+           docker pull valkey/valkey:latest
+           docker save valkey-py-stunnel:latest valkey-py-cluster:latest valkey/valkey:latest -o ./custom-cache/all.tar
+
    run-tests:
      runs-on: ubuntu-latest
+     needs: [populate-cache]
      timeout-minutes: 60
      strategy:
        max-parallel: 15
@@ -70,6 +91,17 @@ jobs:
          with:
            python-version: ${{ matrix.python-version }}
            cache: 'pip'
+
+       - name: Cache docker images
+         id: custom-cache
+         uses: actions/cache@v3
+         with:
+           path: ./custom-cache/
+           fail-on-cache-miss: true
+           key: custom-cache
+       - name: Use Cache
+         run: docker image load -i ./custom-cache/all.tar
+
        - name: run tests
          run: |
            pip install -U setuptools wheel
@@ -115,6 +147,17 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: 3.9
+
+      - name: Cache docker images
+        id: custom-cache
+        uses: actions/cache@v3
+        with:
+          path: ./custom-cache/
+          fail-on-cache-miss: true
+          key: custom-cache
+      - name: Use Cache
+        run: docker image load -i ./custom-cache/all.tar
+
       - name: Run installed unit tests
         run: |
           bash .github/workflows/install_and_test.sh ${{ matrix.extension }}