Really?

.github/workflows/integration-tests.yml

@@ -31,11 +31,28 @@ jobs:
     - name: Download dependencies
       run: go mod download
 
+    - name: Create Docker network and connect runner
+      run: |
+        # Create network
+        docker network create relspec-test-network || true
+
+        # Get current container ID (the runner)
+        RUNNER_CONTAINER_ID=$(cat /proc/self/cgroup | grep 'docker\|kubepods' | head -1 | sed 's/^.*\///' | cut -d':' -f3 | sed 's/^.*\///')
+        if [ -z "$RUNNER_CONTAINER_ID" ]; then
+          # Alternative method: use hostname which is often the container ID
+          RUNNER_CONTAINER_ID=$(hostname)
+        fi
+
+        echo "Runner container ID: $RUNNER_CONTAINER_ID"
+
+        # Connect runner to the network so tests can access PostgreSQL by hostname
+        docker network connect relspec-test-network "$RUNNER_CONTAINER_ID" 2>/dev/null || echo "Already connected or unable to connect"
+
     - name: Start PostgreSQL container
       run: |
         docker run -d \
           --name relspec-test-postgres \
-          -p 5439:5432 \
+          --network relspec-test-network \
           -e POSTGRES_USER=relspec \
           -e POSTGRES_PASSWORD=relspec_test_password \
           -e POSTGRES_DB=relspec_test \
@@ -58,19 +75,10 @@ jobs:
     - name: Get PostgreSQL connection details
       id: pg_connection
       run: |
-        # Get container IP address from Docker bridge network
-        # This is needed because the runner itself is in a Docker container
-        CONTAINER_IP=$(docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' relspec-test-postgres)
-
-        if [ -z "$CONTAINER_IP" ]; then
-          echo "ERROR: Could not get container IP address"
-          docker inspect relspec-test-postgres
-          exit 1
-        fi
-
-        echo "Container IP: $CONTAINER_IP"
-        echo "Using container IP: $CONTAINER_IP:5432"
-        echo "pg_host=$CONTAINER_IP" >> $GITHUB_OUTPUT
+        # Use container name for DNS resolution on the Docker network
+        # This works because both containers are on the same custom network
+        echo "Using container hostname: relspec-test-postgres:5432"
+        echo "pg_host=relspec-test-postgres" >> $GITHUB_OUTPUT
         echo "pg_port=5432" >> $GITHUB_OUTPUT
 
         echo ""
@@ -93,11 +101,11 @@ jobs:
         "
 
     - name: Test Go connection to PostgreSQL
-      env:
-        RELSPEC_TEST_PG_CONN: postgres://relspec:relspec_test_password@${{ steps.pg_connection.outputs.pg_host }}:${{ steps.pg_connection.outputs.pg_port }}/relspec_test
       run: |
         echo "Testing connection using Go (same as integration tests will use)..."
         echo "Connection string: postgres://relspec:***@${{ steps.pg_connection.outputs.pg_host }}:${{ steps.pg_connection.outputs.pg_port }}/relspec_test"
+
+        # Create test program
         mkdir -p /tmp/testconn
         cat > /tmp/testconn/test_conn.go << 'EOF'
         package main
@@ -123,7 +131,17 @@ jobs:
             fmt.Printf("SUCCESS! Connected to: %s\n", version)
         }
         EOF
-        cd /tmp/testconn && go mod init testconn && go mod tidy && go run test_conn.go
+
+        # Build the test program
+        cd /tmp/testconn && go mod init testconn && go mod tidy && go build -o test_conn
+
+        # Run in a container on the same network
+        docker run --rm \
+          --network relspec-test-network \
+          -e RELSPEC_TEST_PG_CONN="postgres://relspec:relspec_test_password@${{ steps.pg_connection.outputs.pg_host }}:${{ steps.pg_connection.outputs.pg_port }}/relspec_test" \
+          -v /tmp/testconn:/app \
+          golang:1.25-alpine \
+          /app/test_conn
 
     - name: Run integration tests
       env:
@@ -135,3 +153,4 @@ jobs:
       run: |
         docker stop relspec-test-postgres || true
         docker rm relspec-test-postgres || true
+        docker network rm relspec-test-network || true