command: peers via ETCDCTL_PEERS env variable

README.md

@@ -238,6 +238,15 @@ The following exit codes can be returned from etcdctl:
 5    500 error from etcd
 ```
 
+## Peers
+
+If your etcd cluster isn't available on `http://127.0.0.1:4001` you can specify
+a `--peers` flag or `ETCDCTL_PEERS` environment variable.
+
+```
+ETCDCTL_PEERS="http://10.0.28.1:4002" etcdctl set my-key to-a-value
+```
+
 ## Project Details
 
 ### Versioning

command/handle.go

@@ -44,7 +44,13 @@ func rawhandle(c *cli.Context, fn handlerFunc) (*etcd.Response, error) {
 	peers := c.GlobalStringSlice("peers")
 	// Append default peer address if not any
 	if len(peers) == 0 {
-		peers = append(peers, "127.0.0.1:4001")
+		peers_from_environment := os.Getenv("ETCDCTL_PEERS")
+
+		if peers_from_environment != "" {
+			peers = strings.Split(peers_from_environment, ",")
+		} else {
+			peers = append(peers, "127.0.0.1:4001")
+		}
 	}
 	// If no sync, create http path for each peer address
 	if !sync {

etcdctl.go

@@ -16,7 +16,7 @@ func main() {
 		cli.BoolFlag{"debug", "output cURL commands which can be used to reproduce the request"},
 		cli.BoolFlag{"no-sync", "don't synchronize cluster information before sending request"},
 		cli.StringFlag{"output, o", "simple", "output response in the given format (`simple` or `json`)"},
-		cli.StringSliceFlag{"peers, C", &cli.StringSlice{}, "a comma-delimited list of machine addresses in the cluster (default: {\"127.0.0.1:4001\"})"},
+		cli.StringSliceFlag{"peers, C", &cli.StringSlice{}, "a comma-delimited list of machine addresses in the cluster (default: \"127.0.0.1:4001\")"},
 	}
 	app.Commands = []cli.Command{
 		command.NewMakeCommand(),