feat: Automate manual E2E testing

.github/workflows/ci.yaml

@@ -119,15 +119,26 @@ jobs:
 
 
   integration:
-    name: Integration and e2e tests
+    name: Integration and E2E tests
     runs-on: ubuntu-latest
     timeout-minutes: 10
+    strategy:
+      fail-fast: false
+      matrix:
+        k8sVersion: [ "v1.28.3", "v1.27.5", "v1.26.8", "v1.25.13", "v1.24.17"]
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-go@v4
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v4
         with:
           go-version-file: 'go.mod'
-      - uses: helm/[email protected]
+
+      - name: Kind action
+        uses: helm/[email protected]
+        with:
+          kubectl_version: ${{ matrix.k8sVersion }}
 
       - name: Create k8s Kind Cluster
         run: make kind-up
@@ -158,9 +169,35 @@ jobs:
           --values values-dev.yaml --values values-local.yaml \
           --wait --timeout 240s
 
-      - name: Run e2e tests
-        run: make test-e2e
+      - name: Confirm external.metrics.k8s.io API implementation details
+        env:
+          ENDPOINT: '/apis/external.metrics.k8s.io/v1beta1/namespaces/*/e2e/'
+          KUBECONFIG: ./kubeconfig  # Generated by `make kind-up`
+        run: |
+          sleep 30
+          KIND=$(kubectl get --raw "${ENDPOINT}" | jq '.kind')
+          API_VERSION=$(kubectl get --raw "${ENDPOINT}" | jq '.apiVersion')
+          METRIC_NAME=$(kubectl get --raw "${ENDPOINT}" | jq '.items[0].metricName')
+          VALUE=$(kubectl get --raw "${ENDPOINT}" | jq '.items[0].value')
+          if [[ ${KIND} != '"ExternalMetricValueList"' ]]; then
+            echo "KIND: found '${KIND}' != expected '\"ExternalMetricValueList\"'"
+            exit 1
+          fi
+          if [[ ${API_VERSION} != '"external.metrics.k8s.io/v1beta1"' ]]; then
+            echo "API_VERSION: found '${API_VERSION}' != expected '\"external.metrics.k8s.io/v1beta1\"'"
+            exit 1
+          fi
+          if [[ ${METRIC_NAME} != '"e2e"' ]]; then
+            echo "METRIC_NAME: found '${METRIC_NAME}' != expected '\"e2e\"'"
+            exit 1
+          fi
+          if [[ ${VALUE} != '"123m"' ]]; then
+            echo "VALUE: found '${VALUE}' != expected '\"123m\"'"
+            exit 1
+          fi
 
+      - name: Run E2E tests
+        run: make test-e2e
 
   static-analysis:
     name: Static analysis and linting

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 ### enhancement
 - E2E testing: use `autoscaling/v2` instead of `autoscaling/v2beta2` by @juanjjaramillo in [#252](https://github.com/newrelic/newrelic-k8s-metrics-adapter/pull/252)
+- Make E2E testing run for all supported K8s versions by @juanjjaramillo in [#253](https://github.com/newrelic/newrelic-k8s-metrics-adapter/pull/253)
 
 ## v0.8.0 - 2023-11-13