randomize raft server startup

also some go fmt

weed/command/benchmark.go

@@ -2,6 +2,7 @@ package command
 
 import (
 	"bufio"
+	"context"
 	"fmt"
 	"io"
 	"math"
@@ -19,7 +20,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/security"
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/chrislusf/seaweedfs/weed/wdclient"
-	"context"
 )
 
 type BenchmarkOptions struct {

weed/command/master.go

@@ -132,7 +132,7 @@ func checkPeers(masterIp string, masterPort int, peers string) (masterAddress st
 	if !hasSelf {
 		peerCount += 1
 	}
-	if peerCount %2 == 0 {
+	if peerCount%2 == 0 {
 		glog.Fatalf("Only odd number of masters are supported!")
 	}
 	return

weed/server/filer_ui/templates.go

@@ -1,8 +1,8 @@
 package master_ui
 
 import (
-	"html/template"
 	"github.com/dustin/go-humanize"
+	"html/template"
 )
 
 var funcMap = template.FuncMap{

weed/server/raft_server.go

@@ -3,6 +3,7 @@ package weed_server
 import (
 	"encoding/json"
 	"io/ioutil"
+	"math/rand"
 	"os"
 	"path"
 	"reflect"
@@ -68,7 +69,7 @@ func NewRaftServer(r *mux.Router, peers []string, httpAddr string, dataDir strin
 	for _, peer := range s.peers {
 		s.raftServer.AddPeer(peer, "http://"+peer)
 	}
-	time.Sleep(2 * time.Second)
+	time.Sleep(time.Duration(1000+rand.Int31n(3000)) * time.Millisecond)
 	if s.raftServer.IsLogEmpty() {
 		// Initialize the server by joining itself.
 		glog.V(0).Infoln("Initializing new cluster")

weed/storage/types/needle_id_128bit.go

@@ -7,7 +7,7 @@ import (
 )
 
 const (
-	NeedleIdSize = 16
+	NeedleIdSize  = 16
 	NeedleIdEmpty = ""
 )
 

weed/storage/types/needle_id_type.go

@@ -11,7 +11,7 @@ import (
 type NeedleId uint64
 
 const (
-	NeedleIdSize = 8
+	NeedleIdSize  = 8
 	NeedleIdEmpty = 0
 )