seaweedfs/go/weed/server.go
2014-03-30 20:57:25 -07:00

203 lines
7.6 KiB
Go

package main
import (
"code.google.com/p/weed-fs/go/glog"
"code.google.com/p/weed-fs/go/util"
"code.google.com/p/weed-fs/go/weed/weed_server"
"github.com/gorilla/mux"
"net/http"
"os"
"runtime"
"strconv"
"strings"
"sync"
"time"
)
var (
filer FilerOptions
)
func init() {
cmdServer.Run = runServer // break init cycle
}
var cmdServer = &Command{
UsageLine: "server -port=8080 -dir=/tmp -max=5 -ip=server_name",
Short: "start a server, including volume server, and automatically elect a master server",
Long: `start both a volume server to provide storage spaces
and a master server to provide volume=>location mapping service and sequence number of file ids
This is provided as a convenient way to start both volume server and master server.
The servers are the same as starting them separately.
So other volume servers can use this embedded master server also.
`,
}
var (
serverIp = cmdServer.Flag.String("ip", "localhost", "ip or server name")
serverMaxCpu = cmdServer.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs")
serverTimeout = cmdServer.Flag.Int("idleTimeout", 10, "connection idle seconds")
serverDataCenter = cmdServer.Flag.String("dataCenter", "", "current volume server's data center name")
serverRack = cmdServer.Flag.String("rack", "", "current volume server's rack name")
serverWhiteListOption = cmdServer.Flag.String("whiteList", "", "comma separated Ip addresses having write permission. No limit if empty.")
serverPeers = cmdServer.Flag.String("peers", "", "other master nodes in comma separated ip:masterPort list")
masterPort = cmdServer.Flag.Int("masterPort", 9333, "master server http listen port")
masterMetaFolder = cmdServer.Flag.String("mdir", "", "data directory to store meta data, default to same as -dir specified")
masterVolumeSizeLimitMB = cmdServer.Flag.Uint("volumeSizeLimitMB", 30*1000, "Master stops directing writes to oversized volumes.")
masterConfFile = cmdServer.Flag.String("conf", "/etc/weedfs/weedfs.conf", "xml configuration file")
masterDefaultReplicaPlacement = cmdServer.Flag.String("defaultReplicaPlacement", "000", "Default replication type if not specified.")
volumePort = cmdServer.Flag.Int("port", 8080, "volume server http listen port")
volumePublicUrl = cmdServer.Flag.String("publicUrl", "", "Publicly accessible <ip|server_name>:<port>")
volumeDataFolders = cmdServer.Flag.String("dir", os.TempDir(), "directories to store data files. dir[,dir]...")
volumeMaxDataVolumeCounts = cmdServer.Flag.String("max", "7", "maximum numbers of volumes, count[,count]...")
volumePulse = cmdServer.Flag.Int("pulseSeconds", 5, "number of seconds between heartbeats")
isStartingFiler = cmdServer.Flag.Bool("filer", false, "whether to start filer")
serverWhiteList []string
)
func init() {
filer.master = cmdServer.Flag.String("filer.master", "", "default to current master server")
filer.collection = cmdServer.Flag.String("filer.collection", "", "all data will be stored in this collection")
filer.port = cmdServer.Flag.Int("filer.port", 8888, "filer server http listen port")
filer.dir = cmdServer.Flag.String("filer.dir", "", "directory to store meta data, default to a 'filer' sub directory of what -mdir is specified")
filer.defaultReplicaPlacement = cmdServer.Flag.String("filer.defaultReplicaPlacement", "", "Default replication type if not specified during runtime.")
}
func runServer(cmd *Command, args []string) bool {
*filer.master = *serverIp + ":" + strconv.Itoa(*masterPort)
if *filer.defaultReplicaPlacement == "" {
*filer.defaultReplicaPlacement = *masterDefaultReplicaPlacement
}
if *serverMaxCpu < 1 {
*serverMaxCpu = runtime.NumCPU()
}
runtime.GOMAXPROCS(*serverMaxCpu)
folders := strings.Split(*volumeDataFolders, ",")
maxCountStrings := strings.Split(*volumeMaxDataVolumeCounts, ",")
maxCounts := make([]int, 0)
for _, maxString := range maxCountStrings {
if max, e := strconv.Atoi(maxString); e == nil {
maxCounts = append(maxCounts, max)
} else {
glog.Fatalf("The max specified in -max not a valid number %s", max)
}
}
if len(folders) != len(maxCounts) {
glog.Fatalf("%d directories by -dir, but only %d max is set by -max", len(folders), len(maxCounts))
}
for _, folder := range folders {
if err := util.TestFolderWritable(folder); err != nil {
glog.Fatalf("Check Data Folder(-dir) Writable %s : %s", folder, err)
}
}
if *masterMetaFolder == "" {
*masterMetaFolder = folders[0]
}
if *filer.dir == "" {
*filer.dir = *masterMetaFolder + "/filer"
os.MkdirAll(*filer.dir, 0700)
}
if err := util.TestFolderWritable(*masterMetaFolder); err != nil {
glog.Fatalf("Check Meta Folder (-mdir=\"%s\") Writable: %s", *masterMetaFolder, err)
}
if err := util.TestFolderWritable(*filer.dir); err != nil {
glog.Fatalf("Check Mapping Meta Folder (-filer.dir=\"%s\") Writable: %s", *filer.dir, err)
}
if *volumePublicUrl == "" {
*volumePublicUrl = *serverIp + ":" + strconv.Itoa(*volumePort)
}
if *serverWhiteListOption != "" {
serverWhiteList = strings.Split(*serverWhiteListOption, ",")
}
if *isStartingFiler {
go func() {
r := http.NewServeMux()
_, nfs_err := weed_server.NewFilerServer(r, *filer.port, *filer.master, *filer.dir, *filer.collection)
if nfs_err != nil {
glog.Fatalf(nfs_err.Error())
}
glog.V(0).Infoln("Start Weed Filer", util.VERSION, "at port", strconv.Itoa(*filer.port))
filerListener, e := util.NewListener(
":"+strconv.Itoa(*filer.port),
time.Duration(10)*time.Second,
)
if e != nil {
glog.Fatalf(e.Error())
}
if e := http.Serve(filerListener, r); e != nil {
glog.Fatalf("Filer Fail to serve:%s", e.Error())
}
}()
}
var raftWaitForMaster sync.WaitGroup
var volumeWait sync.WaitGroup
raftWaitForMaster.Add(1)
volumeWait.Add(1)
go func() {
r := mux.NewRouter()
ms := weed_server.NewMasterServer(r, *masterPort, *masterMetaFolder,
*masterVolumeSizeLimitMB, *volumePulse, *masterConfFile, *masterDefaultReplicaPlacement, *garbageThreshold, serverWhiteList,
)
glog.V(0).Infoln("Start Weed Master", util.VERSION, "at port", *serverIp+":"+strconv.Itoa(*masterPort))
masterListener, e := util.NewListener(
*serverIp+":"+strconv.Itoa(*masterPort),
time.Duration(*serverTimeout)*time.Second,
)
if e != nil {
glog.Fatalf(e.Error())
}
go func() {
raftWaitForMaster.Wait()
time.Sleep(100 * time.Millisecond)
var peers []string
if *serverPeers != "" {
peers = strings.Split(*serverPeers, ",")
}
raftServer := weed_server.NewRaftServer(r, peers, *serverIp+":"+strconv.Itoa(*masterPort), *masterMetaFolder, ms.Topo, *volumePulse)
ms.SetRaftServer(raftServer)
volumeWait.Done()
}()
raftWaitForMaster.Done()
if e := http.Serve(masterListener, r); e != nil {
glog.Fatalf("Master Fail to serve:%s", e.Error())
}
}()
volumeWait.Wait()
time.Sleep(100 * time.Millisecond)
r := http.NewServeMux()
weed_server.NewVolumeServer(r, *serverIp, *volumePort, *volumePublicUrl, folders, maxCounts,
*serverIp+":"+strconv.Itoa(*masterPort), *volumePulse, *serverDataCenter, *serverRack, serverWhiteList,
)
glog.V(0).Infoln("Start Weed volume server", util.VERSION, "at http://"+*serverIp+":"+strconv.Itoa(*volumePort))
volumeListener, e := util.NewListener(
*serverIp+":"+strconv.Itoa(*volumePort),
time.Duration(*serverTimeout)*time.Second,
)
if e != nil {
glog.Fatalf(e.Error())
}
if e := http.Serve(volumeListener, r); e != nil {
glog.Fatalf("Fail to serve:%s", e.Error())
}
return true
}