Move the remaining consul cruft to go-plugins

config/source/etcd/README.md

@@ -0,0 +1,51 @@
+# Etcd Source
+
+The etcd source reads config from etcd key/values
+
+This source supports etcd version 3 and beyond.
+
+## Etcd Format
+
+The etcd source expects keys under the default prefix `/micro/config` (prefix can be changed)
+
+Values are expected to be JSON
+
+```
+// set database
+etcdctl put /micro/config/database '{"address": "10.0.0.1", "port": 3306}'
+// set cache
+etcdctl put /micro/config/cache '{"address": "10.0.0.2", "port": 6379}'
+```
+
+Keys are split on `/` so access becomes
+
+```
+conf.Get("micro", "config", "database")
+```
+
+## New Source
+
+Specify source with data
+
+```go
+etcdSource := etcd.NewSource(
+	// optionally specify etcd address; default to localhost:8500
+	etcd.WithAddress("10.0.0.10:8500"),
+	// optionally specify prefix; defaults to /micro/config
+	etcd.WithPrefix("/my/prefix"),
+	// optionally strip the provided prefix from the keys, defaults to false
+	etcd.StripPrefix(true),
+)
+```
+
+## Load Source
+
+Load the source into config
+
+```go
+// Create new config
+conf := config.NewConfig()
+
+// Load file source
+conf.Load(etcdSource)
+```