Sign KEDA images published on GitHub Container Registry (kedacore#2501)

Signed-off-by: Zbynek Roubalik <zroubali@redhat.com>

.github/workflows/release-build.yml

@@ -65,6 +65,19 @@ jobs:
         env:
           VERSION: ${{ steps.get_version.outputs.VERSION }}
 
+      # https://github.com/sigstore/cosign-installer
+      - name: Install Cosign
+        uses: sigstore/cosign-installer@main
+        with:
+          cosign-release: 'v1.4.1'
+      - name: Check Cosign install!
+        run: cosign version
+
+      - name: Sign KEDA images published on GitHub Container Registry
+        # This step uses the identity token to provision an ephemeral certificate
+        # against the sigstore community Fulcio instance.
+        run: make sign-images
+
       - name: Publish KEDA images on Docker Hub
         run: make publish-dockerhub
         env:

CHANGELOG.md

@@ -31,6 +31,7 @@
 
 - **General:** `keda-operator` Cluster Role: add `list` and `watch` access to service accounts ([#2406](https://github.com/kedacore/keda/pull/2406))|([#2410](https://github.com/kedacore/keda/pull/2410))
 - **General:** Delete the cache entry when a ScaledObject is deleted ([#2408](https://github.com/kedacore/keda/pull/2408))
+- **General:** Sign KEDA images published on GitHub Container Registry ([#2501](https://github.com/kedacore/keda/pull/2501))
 - **Azure Pipelines Scaler:** support `poolName` or `poolID` validation ([#2370](https://github.com/kedacore/keda/pull/2370))
 - **Graphite Scaler:** use the latest datapoint returned, not the earliest ([#2365](https://github.com/kedacore/keda/pull/2365))
 - **Kubernetes Workload Scaler:** ignore terminated pods ([#2384](https://github.com/kedacore/keda/pull/2384))

Makefile

@@ -43,6 +43,8 @@ endif
 GO_BUILD_VARS= GO111MODULE=on CGO_ENABLED=$(CGO) GOOS=$(TARGET_OS) GOARCH=$(ARCH)
 GO_LDFLAGS="-X=github.com/kedacore/keda/v2/version.GitCommit=$(GIT_COMMIT) -X=github.com/kedacore/keda/v2/version.Version=$(VERSION)"
 
+COSIGN_FLAGS ?= -a GIT_HASH=${GIT_COMMIT} -a GIT_VERSION=${VERSION} -a BUILD_DATE=${DATE}
+
 # ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
 ENVTEST_K8S_VERSION = 1.22
 
@@ -191,6 +193,10 @@ release: manifests kustomize set-version ## Produce new KEDA release in keda-$(V
 	rm -rf config/default/kustomize-config/metadataLabelTransformer.yaml.out
 	$(KUSTOMIZE) build config/default > keda-$(VERSION).yaml
 
+sign-images: ## Sign KEDA images published on GitHub Container Registry
+	COSIGN_EXPERIMENTAL=1 cosign sign ${COSIGN_FLAGS} $(IMAGE_CONTROLLER)
+	COSIGN_EXPERIMENTAL=1 cosign sign ${COSIGN_FLAGS} $(IMAGE_ADAPTER)
+
 .PHONY: set-version
 set-version:
 	@sed -i".out" -e 's@Version[ ]*=.*@Version = "$(VERSION)"@g' ./version/version.go;