Add in sysctl container

- based on @riyazdf earlier unmerged Go version 891c006d34/alpine/containers/cloud-config/main.go

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

base/sysctl/Makefile

@@ -0,0 +1,44 @@
+GO_COMPILE=mobylinux/go-compile:236629d9fc0779db9e7573ceb8b0e92f08f553be@sha256:16020c2d90cecb1f1d2d731187e947535c23f38b62319dd386ae642b4b32e1fb
+
+SHA_IMAGE=alpine:3.5@sha256:dfbd4a3a8ebca874ebd2474f044a0b33600d4523d03b0df76e5c5986cb02d7e8
+
+SYSCTL_BINARY=usr/bin/sysctl
+
+IMAGE=sysctl
+
+.PHONY: tag push clean container
+default: push
+
+$(SYSCTL_BINARY): main.go
+	mkdir -p $(dir $@)
+	tar cf - $^ | docker run --rm --net=none --log-driver=none -i $(GO_COMPILE) -o $@ | tar xf -
+
+DIRS=dev proc sys
+$(DIRS):
+	mkdir -p $@
+
+DEPS=$(DIRS) $(SYSCTL_BINARY) etc/sysctl.d/00-moby.conf
+
+container: Dockerfile $(DEPS)
+	tar cf - $^ | docker build --no-cache -t $(IMAGE):build -
+
+hash: Dockerfile $(DEPS)
+	find $^ -type f | xargs cat | docker run --rm -i $(SHA_IMAGE) sha1sum - | sed 's/ .*//' > hash
+
+push: hash container
+	docker pull mobylinux/$(IMAGE):$(shell cat hash) || \
+		(docker tag $(IMAGE):build mobylinux/$(IMAGE):$(shell cat hash) && \
+		 docker push mobylinux/$(IMAGE):$(shell cat hash))
+	docker rmi $(IMAGE):build
+	rm -f hash
+
+tag: hash container
+	docker pull mobylinux/$(IMAGE):$(shell cat hash) || \
+		docker tag $(IMAGE):build mobylinux/$(IMAGE):$(shell cat hash)
+	docker rmi $(IMAGE):build
+	rm -f hash
+
+clean:
+	rm -rf hash $(DIRS) usr
+
+.DELETE_ON_ERROR: