ci: bound nightly etcd stabilization

Signed-off-by: Maximilian Rink <maximilian.rink@telekom.de>

.github/workflows/nightly-e2e.yaml

@@ -22,6 +22,15 @@ jobs:
           go-version-file: go.mod
       - name: Run tests
         run: make unit-tests
+      - name: Summarize coverage
+        if: always()
+        run: |
+          if test -f coverage.out; then
+            echo "### Unit coverage" >> "$GITHUB_STEP_SUMMARY"
+            go tool cover -func=coverage.out | tail -1 >> "$GITHUB_STEP_SUMMARY"
+          else
+            echo "### Unit coverage: report missing" >> "$GITHUB_STEP_SUMMARY"
+          fi
       - name: Upload coverage
         uses: actions/upload-artifact@v7
         with:
@@ -46,16 +55,30 @@ jobs:
         run: make dockerx86Local
       - name: Run Etcd tests
         id: etcd
-        # The suite has been out of CI and may be unstable; keep the workflow green
-        # but surface the failure in the run summary until it is proven reliable.
+        # Scheduled failures are tolerated only during the initial stabilization window.
+        # The enforcement step below makes manual runs and later schedules blocking.
         continue-on-error: true
         run: DOCKER_API_VERSION=1.48 E2E_KEEP_LOGS=true GINKGO_ARGS="--json-report=/tmp/kube-vip-test-report-etcd.json --output-dir=/tmp" make e2e-tests-etcd
-      - name: Report etcd suite failure
-        if: steps.etcd.outcome == 'failure'
-        run: echo "::warning::etcd e2e suite failed (non-blocking); see the etcd-e2e-logs artifact" && echo "etcd e2e suite FAILED (non-blocking)" >> "$GITHUB_STEP_SUMMARY"
+      - name: Summarize Etcd suite
+        if: always()
+        env:
+          OUTCOME: ${{ steps.etcd.outcome }}
+        run: 'echo "### Etcd E2E result: ${OUTCOME}" >> "$GITHUB_STEP_SUMMARY"'
       - name: Save logs
         uses: actions/upload-artifact@v7
         with:
           name: etcd-e2e-logs
           path: /tmp/kube-vip-test*
+          if-no-files-found: error
         if: always()
+      - name: Enforce Etcd result
+        if: steps.etcd.outcome == 'failure'
+        env:
+          EVENT_NAME: ${{ github.event_name }}
+        run: |
+          if test "$EVENT_NAME" = schedule && test "$(date -u +%Y-%m-%d)" \< 2026-10-01; then
+            echo "::warning::etcd e2e suite failed during stabilization through 2026-09-30"
+            exit 0
+          fi
+          echo "::error::etcd e2e suite failed; see the etcd-e2e-logs artifact"
+          exit 1

Makefile

@@ -16,7 +16,7 @@ TARGETOS=linux
 LDFLAGS=-ldflags "-s -w -X=main.Version=$(VERSION) -X=main.Build=$(BUILD) -extldflags -static"
 DOCKERTAG ?= $(VERSION)
 REPOSITORY ?= docker.io/plndr
-GO_VERSION := 1.26.6
+GO_VERSION := $(word 2,$(shell grep '^go ' go.mod))
 K8S_VERSION ?= v1.35.0
 GINKGO_ARGS ?=
 GINKGO_PROCS ?=