*: bump to v0.4.9+git

server: introduce /v2/migration/snapshot endpoint

Documentation/configuration.md

@@ -34,7 +34,7 @@ The full documentation is contained in the [API docs](https://github.com/coreos/
 * `-discovery` - A URL to use for discovering the peer list. (i.e `"https://discovery.etcd.io/your-unique-key"`).
 * `-http-read-timeout` - The number of seconds before an HTTP read operation is timed out.
 * `-http-write-timeout` - The number of seconds before an HTTP write operation is timed out.
-* `-bind-addr` - The listening hostname for client communication. Defaults to advertised IP.
+* `-bind-addr` - The listening hostname for client communication. Defaults to 0.0.0.0 and the advertised port.
 * `-peers` - A comma separated list of peers in the cluster (i.e `"203.0.113.101:7001,203.0.113.102:7001"`).
 * `-peers-file` - The file path containing a comma separated list of peers in the cluster.
 * `-ca-file` - The path of the client CAFile. Enables client cert authentication when present.
@@ -47,7 +47,7 @@ The full documentation is contained in the [API docs](https://github.com/coreos/
 * `-max-result-buffer` - The max size of result buffer. Defaults to `1024`.
 * `-max-retry-attempts` - The max retry attempts when trying to join a cluster. Defaults to `3`.
 * `-peer-addr` - The advertised public hostname:port for server communication. Defaults to `127.0.0.1:7001`.
-* `-peer-bind-addr` - The listening hostname for server communication. Defaults to advertised IP.
+* `-peer-bind-addr` - The listening hostname for server communication. Defaults to 0.0.0.0 and the advertised peer port.
 * `-peer-ca-file` - The path of the CAFile. Enables client/peer cert authentication when present.
 * `-peer-cert-file` - The cert file of the server.
 * `-peer-key-file` - The key file of the server.

README.md

@@ -1,6 +1,6 @@
 # etcd
 
-README version 0.4.6
+README version 0.4.8
 
 A highly-available key value store for shared configuration and service discovery.
 etcd is inspired by [Apache ZooKeeper][zookeeper] and [doozer][doozer], with a focus on being:

config/config.go

@@ -86,7 +86,7 @@ type Config struct {
 		HeartbeatInterval int    `toml:"heartbeat_interval" env:"ETCD_PEER_HEARTBEAT_INTERVAL"`
 		ElectionTimeout   int    `toml:"election_timeout" env:"ETCD_PEER_ELECTION_TIMEOUT"`
 	}
-	strTrace     string `toml:"trace" env:"ETCD_TRACE"`
+	StrTrace     string `toml:"trace" env:"ETCD_TRACE"`
 	GraphiteHost string `toml:"graphite_host" env:"ETCD_GRAPHITE_HOST"`
 	Cluster      struct {
 		ActiveSize   int     `toml:"active_size" env:"ETCD_CLUSTER_ACTIVE_SIZE"`
@@ -275,7 +275,7 @@ func (c *Config) LoadFlags(arguments []string) error {
 	f.IntVar(&c.SnapshotCount, "snapshot-count", c.SnapshotCount, "")
 	f.StringVar(&c.CPUProfileFile, "cpuprofile", "", "")
 
-	f.StringVar(&c.strTrace, "trace", "", "")
+	f.StringVar(&c.StrTrace, "trace", "", "")
 	f.StringVar(&c.GraphiteHost, "graphite-host", "", "")
 
 	f.IntVar(&c.Cluster.ActiveSize, "cluster-active-size", c.Cluster.ActiveSize, "")
@@ -441,7 +441,7 @@ func (c *Config) MetricsBucketName() string {
 
 // Trace determines if any trace-level information should be emitted
 func (c *Config) Trace() bool {
-	return c.strTrace == "*"
+	return c.StrTrace == "*"
 }
 
 func (c *Config) ClusterConfig() *server.ClusterConfig {

server/join_command.go

@@ -46,6 +46,7 @@ func (c *JoinCommand) NodeName() string {
 // applyJoin attempts to join a machine to the cluster.
 func applyJoin(c *JoinCommand, context raft.Context) (uint64, error) {
 	ps, _ := context.Server().Context().(*PeerServer)
+	ps.raftServer.FlushCommitIndex()
 	commitIndex := context.CommitIndex()
 
 	// Make sure we're not getting a cached value from the registry.

server/release_version.go

@@ -1,3 +1,3 @@
 package server
 
-const ReleaseVersion = "0.4.6"
+const ReleaseVersion = "0.4.9+git"

server/server.go

@@ -3,8 +3,10 @@ package server
 import (
 	"encoding/json"
 	"fmt"
+	"io/ioutil"
 	"net/http"
 	"net/http/pprof"
+	"path"
 	"strings"
 	"time"
 
@@ -135,6 +137,7 @@ func (s *Server) installV2(r *mux.Router) {
 	s.handleFunc(r2, "/v2/stats/leader", s.GetLeaderStatsHandler).Methods("GET", "HEAD")
 	s.handleFunc(r2, "/v2/stats/store", s.GetStoreStatsHandler).Methods("GET", "HEAD")
 	s.handleFunc(r2, "/v2/speedTest", s.SpeedTestHandler).Methods("GET", "HEAD")
+	s.handleFunc(r2, "/v2/migration/snapshot", s.SnapshotHandler).Methods("GET")
 }
 
 func (s *Server) installMod(r *mux.Router) {
@@ -324,12 +327,8 @@ func (s *Server) GetLeaderStatsHandler(w http.ResponseWriter, req *http.Request)
 		return nil
 	}
 
-	leader := s.peerServer.RaftServer().Leader()
-	if leader == "" {
-		return etcdErr.NewError(300, "", s.Store().Index())
-	}
-	hostname, _ := s.registry.ClientURL(leader)
-	uhttp.Redirect(hostname, w, req)
+	w.WriteHeader(http.StatusForbidden)
+	w.Write([]byte("not current leader"))
 	return nil
 }
 
@@ -363,6 +362,41 @@ func (s *Server) SpeedTestHandler(w http.ResponseWriter, req *http.Request) erro
 	return nil
 }
 
+// SnapshotHandler forces etcd store to do a snapshot. If the disk parameter is set, the snapshot
+// will be written to disk at data-dir/index-migrate.snap. Or the snapshot will be returned as
+// http body.
+func (s *Server) SnapshotHandler(w http.ResponseWriter, req *http.Request) error {
+	data, err := s.Store().Save()
+	if err != nil {
+		http.Error(w, "failed to create snapshot: "+err.Error(), http.StatusInternalServerError)
+		log.Warn("Failed to create snapshot:" + err.Error())
+		return nil
+	}
+
+	disk := req.FormValue("disk")
+	if disk == "true" {
+		name := fmt.Sprintf("%d-migrate.snap", s.peerServer.RaftServer().CommitIndex())
+		err = ioutil.WriteFile(path.Join(s.peerServer.RaftServer().Path(), name), data, 0600)
+		if err != nil {
+			http.Error(w, "failed to save snapshot: "+err.Error(), http.StatusInternalServerError)
+			log.Warn("server: failed to save snapshot: " + err.Error())
+			return nil
+		}
+		log.Infof("server: saved snapshot file %s successfully", name)
+		return nil
+	}
+	if disk != "" && disk != "false" {
+		http.Error(w, "invalid parameter: disk="+disk, http.StatusBadRequest)
+		return nil
+	}
+
+	_, err = w.Write(data)
+	if err != nil {
+		log.Warnf("server: failed to write snapshot to %s: %v", req.RemoteAddr, err.Error())
+	}
+	return nil
+}
+
 // Retrieves metrics from bucket
 func (s *Server) GetMetricsHandler(w http.ResponseWriter, req *http.Request) error {
 	(*s.metrics).Dump(w)