Don't rebuild docker images on every kind-e2e run

Author: carreter

.github/workflows/e2e.yaml

@@ -94,7 +94,7 @@ jobs:
         docker tag gcr.io/k8s-staging-kas-network-proxy/proxy-server:master gcr.io/k8s-staging-kas-network-proxy/proxy-server-amd64:master
         docker tag gcr.io/k8s-staging-kas-network-proxy/proxy-agent:master gcr.io/k8s-staging-kas-network-proxy/proxy-agent-amd64:master
     - name: Run e2e tests
-      run: make test-e2e
+      run: make test-e2e-ci
   e2e:
     name: e2e
     runs-on: ubuntu-20.04

Makefile

@@ -87,6 +87,11 @@ test-integration: build
 test-e2e: docker-build
 	go test -mod=vendor ./e2e -race -agent-image ${AGENT_FULL_IMAGE}-$(TARGETARCH):${TAG} -server-image ${SERVER_FULL_IMAGE}-$(TARGETARCH):${TAG} -kind-image ${KIND_IMAGE} -mode ${CONNECTION_MODE}
 
+# e2e test runner for continuous integration that does not build a new image.
+.PHONY: test-e2e-ci
+test-e2e:
+	go test -mod=vendor ./e2e -race -agent-image ${AGENT_FULL_IMAGE}-$(TARGETARCH):${TAG} -server-image ${SERVER_FULL_IMAGE}-$(TARGETARCH):${TAG} -kind-image ${KIND_IMAGE} -mode ${CONNECTION_MODE}
+
 ## --------------------------------------
 ## Binaries
 ## --------------------------------------