Parse metadata outside of cluster.go

Move the calls for metadata decoding from the cluster
membership management loop to the main loop. This task
was not directly related to the cluster, and was adding
complexity, including the need for multierr structures.

main.go

@@ -49,7 +49,7 @@ func main() {
 	wg.assignOverlayAddr((*net.IPNet)(config.OverlayNet), cluster.localName)
 	cluster.update()
 
-	nodec, errc := cluster.members() // avoid deadlocks by starting before join
+	nodec := cluster.members() // avoid deadlocks by starting before join
 	if err := backoff.RetryNotify(
 		func() error { return cluster.join(config.Join) },
 		backoff.NewExponentialBackOff(),
@@ -65,9 +65,17 @@ func main() {
 	logrus.Debug("waiting for cluster events")
 	for {
 		select {
-		case nodes := <-nodec:
+		case rawNodes := <-nodec:
 			logrus.Info("cluster members:\n")
-			for _, node := range nodes {
+			nodes := make([]node, 0)
+			for _, node := range rawNodes {
+				meta, err := decodeNodeMeta(node.Meta)
+				if err != nil {
+					logrus.Warnf("\t addr: %s, could not decode metadata", node.Addr)
+					continue
+				}
+				node.nodeMeta = meta
+				nodes = append(nodes, node)
 				logrus.Infof("\taddr: %s, overlay: %s, pubkey: %s", node.Addr, node.OverlayAddr, node.PubKey)
 			}
 			if err := wg.setUpInterface(nodes); err != nil {
@@ -79,8 +87,6 @@ func main() {
 					logrus.WithError(err).Error("could not write hosts entries")
 				}
 			}
-		case errs := <-errc:
-			logrus.WithError(errs).Error("could not receive node info")
 		case <-incomingSigs:
 			logrus.Info("terminating...")
 			cluster.leave()