coreos templates via makefile

Makefile

CTX=etcd.yaml.tmpl.ctx

etcd:	CONFS=$(addsuffix .json, $(shell cat .hosts))
etcd:	$(CTX) $(ROOT)/bin/templater .hosts
	make $(CONFS)

install:	CONFS=$(addsuffix .json, $(shell cat .hosts))
install:	etcd .hosts
	scp $(CONFS) $(CONFIG_TARGET)/ignition/

health:	HOSTS=$(shell cat .hosts)
health:	.hosts
	H=$$(echo $(HOSTS) | cut -d ' ' -f $$(expr $$RANDOM % $$(echo $(HOSTS) | wc -w) + 1)); \
	echo host: "$$H"; \
	ssh "$$H" etcdctl cluster-health

reboot:	HOSTS=$(shell cat .hosts)
reboot:	.hosts
	for host in $(HOSTS); do \
		ssh $$host sudo reboot; \
		while ! ssh -o ConnectTimeout=10 $$host etcdctl cluster-health; do sleep 1; done \
	done

%.yaml:	etcd.yaml.tmpl $(CTX) $(ROOT)/bin/templater
	HOST=$* $(ROOT)/bin/templater -c $(CTX) < $< > $@

.hosts:	$(CTX) $(ROOT)/bin/templater
	echo '{{range $$k, $$v := .hosts}}{{$$k}} {{end}}{{range $$k, $$v := .proxies}}{{$$k}} {{end}}' | $(ROOT)/bin/templater -c $(CTX) > $@

.PHONY:	etcd install

include $(ROOT)/Makefile.inc
include $(ROOT)/Makefile.private