test: add e2e

.github/workflows/e2e.yaml

@@ -0,0 +1,59 @@
+name: Build and run e2e tests
+
+on: # yamllint disable-line rule:truthy
+  pull_request:
+
+# default permissions as read only
+permissions: read-all
+
+jobs:
+  check-changes:
+    runs-on: ubuntu-latest
+    outputs:
+      changes: ${{ steps.filter.outputs.changes }}
+    steps:
+      - name: checkout source
+        uses: actions/checkout@v6
+
+      - name: filter changes
+        uses: dorny/paths-filter@v3
+        id: filter
+        with:
+          filters: |
+            changes:
+              - 'cmd/**/*.go'
+              - 'internal/**/*.go'
+              - 'config/**/*.go'
+              - 'test/**/*'
+              - 'go.mod'
+              - 'go.sum'
+              - '.github/workflows/k8s-bm.yaml'
+
+  build-and-deploy:
+    needs: [check-changes]
+    if: needs.check-changes.outputs.changes == 'true' && github.repository_owner == 'sustainable-computing-io'
+    runs-on: self-hosted
+    steps:
+      # NOTE: In case of self-hosted runners, tools like docker, make, kubectl etc. are installed at the time of setting up the runner.
+      # Hence, we don't need to install them as part of the job.
+      - name: Checkout source
+        uses: actions/checkout@v6
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0
+
+      - name: Setup Go
+        uses: actions/[email protected]
+        with:
+          go-version-file: go.mod
+          cache: false
+
+      - name: Build Kepler and e2e binary
+        shell: bash
+        run: |
+          make test-e2e
+
+      - name: Run e2e tests
+        shell: bash
+        run: |
+          sudo ./bin/kepler-e2e.test -test.v -test.timeout=15m

Makefile

@@ -136,6 +136,24 @@ test: ## Test with race detection and coverage
 coverage: test ## Coverage report generation (HTML)
 	$(GOCMD) tool cover -html=$(COVER_PROFILE) -o $(COVER_HTML)
 
+# Build e2e test binary
+.PHONY: test-e2e
+test-e2e: build ## Build e2e test binary (run with sudo separately)
+	@echo "Building e2e test binary..."
+	CGO_ENABLED=1 $(GOTEST) -race -c -o $(BINARY_DIR)/kepler-e2e.test ./test/e2e
+	@echo ""
+	@echo "E2E test binary built: $(BINARY_DIR)/kepler-e2e.test"
+	@echo ""
+	@echo "To run (requires root for RAPL access):"
+	@echo "  sudo ./$(BINARY_DIR)/kepler-e2e.test -test.v"
+	@echo ""
+	@echo "Optional flags:"
+	@echo "  -kepler.binary=/path/to/kepler"
+	@echo "  -kepler.port=9999"
+	@echo "  -kepler.config=/path/to/config"
+	@echo ""
+	@echo "Prerequisites: Intel RAPL, stress-ng (for workload tests)"
+
 # Generate metrics documentation
 .PHONY: gen-metrics-docs
 gen-metrics-docs: ## Documentation generation for metrics