contrib/openldap: add a OpenLDAP container for testing

contrib/openldap/Makefile

@@ -0,0 +1,36 @@
+image=quay.io/coreos/openldap:2.4.44
+image_file=assets/openldap_2_4_44.docker
+
+aci_file=quay.io-coreos-openldap-2.4.44.aci
+
+$(shell mkdir -p assets)
+
+user=$(shell id -u -n)
+group=$(shell id -g -n)
+
+.PHONY: build
+build: $(image_file)
+
+$(image_file): assets/openldap-2.4.44.tgz Dockerfile scripts/entrypoint.sh
+	sudo docker build -t  $(image) .
+	sudo docker save -o $(image_file) $(image)
+	# Change ownership of the container.
+	sudo chown $(user):$(group) $(image_file)
+
+assets/openldap-2.4.44.tgz: scripts/download.sh
+	./scripts/download.sh
+
+$(aci_file): $(image_file)
+	docker2aci $(image_file)
+	mv $(aci_file) assets/$(aci_file)
+
+.PHONY: import-aci
+import-aci: $(aci_file)
+	sudo rkt fetch --insecure-options=image ./assets/quay.io-coreos-openldap-2.4.44.aci
+
+clean:
+	rm -rf assets/*
+
+.PHONY: push
+push:
+	sudo docker push quay.io/coreos/openldap:2.4.44