Try running localhost using the action localstack provides, rather than in docker.

Author: acerathereinspirative-nhs-nvir

.github/workflows/stage-4-acceptance.yaml

@@ -111,7 +111,8 @@ jobs:
     needs: environment-set-up
     timeout-minutes: 10
     env:
-      LOCALSTACK_INTERNAL_DYNAMODB_ENDPOINT: http://localstack:4566/
+      LOCALSTACK_INTERNAL_DYNAMODB_ENDPOINT: http://localhost:4566/
+      RUNNING_LOCALSTACK_URL: http://localhost:4566/
     steps:
       - name: "Checkout code"
         uses: actions/checkout@v4
@@ -124,6 +125,11 @@ jobs:
         with:
           name: lambda
           path: dist/
+      - name: Start LocalStack
+        uses: LocalStack/[email protected]
+        with:
+          image-tag: 'latest'
+          install-awslocal: 'true'
       - name: "Run integration test"
         run: |
           make test-integration

tests/integration/conftest.py

@@ -20,6 +20,9 @@
 
 @pytest.fixture(scope="session")
 def localstack(docker_ip, docker_services) -> URL:
+    if url := os.getenv("RUNNING_LOCALSTACK_URL", None):
+        logger.info("localstack already running on %s", url)
+        return URL(url)
     logger.info("Starting localstack")
     port = docker_services.port_for("localstack", 4566)
     url = URL(f"http://{docker_ip}:{port}")