etcdserver: stop worrying about scheme

Stop worrying about the scheme. This puts a TODO on adding validation to
the schemes if TLS is specified. But we can worry about that later.

Procfile

@@ -1,5 +1,5 @@
 # Use goreman to run `go get github.com/mattn/goreman`
-etcd1: bin/etcd -name node1 -bind-addr 127.0.0.1:4001 -peer-bind-addr :7001 -bootstrap-config 'node1=localhost:7001,node2=localhost:7002,node3=localhost:7003'
-etcd2: bin/etcd -name node2 -bind-addr 127.0.0.1:4002 -peer-bind-addr :7002 -bootstrap-config 'node1=localhost:7001,node2=localhost:7002,node3=localhost:7003'
-etcd3: bin/etcd -name node3 -bind-addr 127.0.0.1:4003 -peer-bind-addr :7003 -bootstrap-config 'node1=localhost:7001,node2=localhost:7002,node3=localhost:7003'
+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 -bootstrap-config 'node1=http://localhost:7001,node2=http://localhost:7002,node3=http://localhost:7003'
+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 -bootstrap-config 'node1=http://localhost:7001,node2=http://localhost:7002,node3=http://localhost:7003'
+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 -bootstrap-config 'node1=http://localhost:7001,node2=http://localhost:7002,node3=http://localhost:7003'
 #proxy: bin/etcd -proxy=on -bind-addr 127.0.0.1:8080 -peers 'localhost:7001,localhost:7002,localhost:7003'

etcdserver/cluster.go

@@ -48,11 +48,11 @@ func (c *Cluster) AddSlice(mems []Member) error {
 // an addressible URI. If the given member does not exist, an empty string is returned.
 func (c Cluster) Pick(id int64) string {
 	if m := c.FindID(id); m != nil {
-		addrs := m.PeerURLs
-		if len(addrs) == 0 {
+		urls := m.PeerURLs
+		if len(urls) == 0 {
 			return ""
 		}
-		return addrs[rand.Intn(len(addrs))]
+		return urls[rand.Intn(len(urls))]
 	}
 
 	return ""

etcdserver/cluster_store.go

@@ -78,25 +78,20 @@ func (s *clusterStore) Delete(id int64) {
 func Sender(t *http.Transport, cls ClusterStore) func(msgs []raftpb.Message) {
 	c := &http.Client{Transport: t}
 
-	scheme := "http"
-	if t.TLSClientConfig != nil {
-		scheme = "https"
-	}
-
 	return func(msgs []raftpb.Message) {
 		for _, m := range msgs {
 			// TODO: reuse go routines
 			// limit the number of outgoing connections for the same receiver
-			go send(c, scheme, cls, m)
+			go send(c, cls, m)
 		}
 	}
 }
 
-func send(c *http.Client, scheme string, cls ClusterStore, m raftpb.Message) {
+func send(c *http.Client, cls ClusterStore, m raftpb.Message) {
 	// TODO (xiangli): reasonable retry logic
 	for i := 0; i < 3; i++ {
-		addr := cls.Get().Pick(m.To)
-		if addr == "" {
+		u := cls.Get().Pick(m.To)
+		if u == "" {
 			// TODO: unknown peer id.. what do we do? I
 			// don't think his should ever happen, need to
 			// look into this further.
@@ -104,7 +99,7 @@ func send(c *http.Client, scheme string, cls ClusterStore, m raftpb.Message) {
 			return
 		}
 
-		url := fmt.Sprintf("%s://%s%s", scheme, addr, raftPrefix)
+		u = fmt.Sprintf("%s%s", u, raftPrefix)
 
 		// TODO: don't block. we should be able to have 1000s
 		// of messages out at a time.
@@ -113,7 +108,7 @@ func send(c *http.Client, scheme string, cls ClusterStore, m raftpb.Message) {
 			log.Println("etcdhttp: dropping message:", err)
 			return // drop bad message
 		}
-		if httpPost(c, url, data) {
+		if httpPost(c, u, data) {
 			return // success
 		}
 		// TODO: backoff