Automate Local Image Pruning (#3587)

* adding labels to each stage in docker file ci-rp
* added a new makefile target ci-clean to prune local images
* removing ci-portal from .PHONY accidentally came with previous commit

Dockerfile.ci-rp

@@ -6,6 +6,7 @@ ARG ARO_VERSION
 # builder is responsible for all compilation and validation of the RP
 ###############################################################################
 FROM ${REGISTRY}/ubi8/nodejs-16  as portal-build
+LABEL aro-portal-build=true
 WORKDIR /build/portal/v2
 USER root
 
@@ -23,6 +24,7 @@ RUN npm run lint && npm run build
 ###############################################################################
 FROM ${REGISTRY}/ubi8/go-toolset:1.20.12-5 AS builder
 ARG ARO_VERSION
+LABEL aro-builder=true
 USER root
 WORKDIR /app
 
@@ -61,6 +63,7 @@ RUN hack/fips/validate-fips.sh ./aro
 # Stage 3: final is our slim image with minimal layers and tools
 ###############################################################################
 FROM ${REGISTRY}/ubi8/ubi-minimal AS final
+LABEL aro-final=true
 RUN microdnf update && microdnf clean all
 COPY --from=builder /app/aro /app/e2e.test /usr/local/bin/
 ENTRYPOINT ["aro"]

Makefile

@@ -79,6 +79,9 @@ client: generate
 ci-rp: fix-macos-vendor
 	docker build . -f Dockerfile.ci-rp --ulimit=nofile=4096:4096 --build-arg REGISTRY=$(REGISTRY) --build-arg ARO_VERSION=$(VERSION) --no-cache=$(NO_CACHE)
 
+ci-clean:
+	docker image prune --all --filter="label=aro-*=true"
+
 # TODO: hard coding dev-config.yaml is clunky; it is also probably convenient to
 # override COMMIT.
 deploy:
@@ -278,4 +281,4 @@ vendor:
 install-go-tools:
 	go install ${GOTESTSUM}
 
-.PHONY: admin.kubeconfig aks.kubeconfig aro az ci-portal ci-rp clean client deploy dev-config.yaml discoverycache fix-macos-vendor generate image-aro-multistage image-fluentbit image-proxy init-contrib lint-go runlocal-rp proxy publish-image-aro-multistage publish-image-fluentbit publish-image-proxy secrets secrets-update e2e.test tunnel test-e2e test-go test-python vendor build-all validate-go unit-test-go coverage-go validate-fips install-go-tools
+.PHONY: admin.kubeconfig aks.kubeconfig aro az ci-rp ci-clean clean client deploy dev-config.yaml discoverycache fix-macos-vendor generate image-aro-multistage image-fluentbit image-proxy init-contrib lint-go runlocal-rp proxy publish-image-aro-multistage publish-image-fluentbit publish-image-proxy secrets secrets-update e2e.test tunnel test-e2e test-go test-python vendor build-all validate-go unit-test-go coverage-go validate-fips install-go-tools