hack: introduce a insta-discovery script

This sets up a localhost cluster via a new discovery token. Very useful
for testing.

.gitignore

@@ -4,6 +4,7 @@
 /machine*
 /bin
 .vagrant
-/*_etcd_data
+*_etcd_data
 etcd
 *.swp
+/hack/insta-discovery/.env

hack/README.md

@@ -0,0 +1 @@
+Various hacks that are used by developers.

hack/insta-discovery/Procfile

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+# Use goreman to run `go get github.com/mattn/goreman`
+etcd1: ../../bin/etcd -name node1 -listen-client-urls http://127.0.0.1:4001 -advertise-client-urls http://127.0.0.1:4001 -listen-peer-urls http://127.0.0.1:7001 -advertise-peer-urls http://127.0.0.1:7001
+etcd2: ../../bin/etcd -name node2 -listen-client-urls http://127.0.0.1:4002 -advertise-client-urls http://127.0.0.1:4002 -listen-peer-urls http://127.0.0.1:7002 -advertise-peer-urls http://127.0.0.1:7002
+etcd3: ../../bin/etcd -name node3 -listen-client-urls http://127.0.0.1:4003 -advertise-client-urls http://127.0.0.1:4003 -listen-peer-urls http://127.0.0.1:7003 -advertise-peer-urls http://127.0.0.1:7003

hack/insta-discovery/README.md

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+Starts a cluster via the discovery service on your local machine. Useful for testing.

hack/insta-discovery/discovery

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+#!/bin/sh
+
+disc=$(curl https://discovery.etcd.io/new?size=3)
+echo ETCD_DISCOVERY=${disc} > .env
+echo "setup discovery start your cluster"
+cat .env
+goreman start