seaweedfs/go/weed/volume.go

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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"
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"net/http"
"os"
"runtime"
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"strconv"
"strings"
"time"
)
func init() {
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cmdVolume.Run = runVolume // break init cycle
}
var cmdVolume = &Command{
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UsageLine: "volume -port=8080 -dir=/tmp -max=5 -ip=server_name -mserver=localhost:9333",
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Short: "start a volume server",
Long: `start a volume server to provide storage spaces
`,
}
var (
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vport = cmdVolume.Flag.Int("port", 8080, "http listen port")
volumeFolders = cmdVolume.Flag.String("dir", os.TempDir(), "directories to store data files. dir[,dir]...")
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maxVolumeCounts = cmdVolume.Flag.String("max", "7", "maximum numbers of volumes, count[,count]...")
ip = cmdVolume.Flag.String("ip", "localhost", "ip or server name")
publicUrl = cmdVolume.Flag.String("publicUrl", "", "Publicly accessible <ip|server_name>:<port>")
masterNode = cmdVolume.Flag.String("mserver", "localhost:9333", "master server location")
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vpulse = cmdVolume.Flag.Int("pulseSeconds", 5, "number of seconds between heartbeats, must be smaller than or equal to the master's setting")
vTimeout = cmdVolume.Flag.Int("idleTimeout", 10, "connection idle seconds")
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vMaxCpu = cmdVolume.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs")
dataCenter = cmdVolume.Flag.String("dataCenter", "", "current volume server's data center name")
rack = cmdVolume.Flag.String("rack", "", "current volume server's rack name")
volumeWhiteListOption = cmdVolume.Flag.String("whiteList", "", "comma separated Ip addresses having write permission. No limit if empty.")
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volumeWhiteList []string
)
func runVolume(cmd *Command, args []string) bool {
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if *vMaxCpu < 1 {
*vMaxCpu = runtime.NumCPU()
}
runtime.GOMAXPROCS(*vMaxCpu)
folders := strings.Split(*volumeFolders, ",")
maxCountStrings := strings.Split(*maxVolumeCounts, ",")
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", maxString)
}
}
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)
}
}
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if *publicUrl == "" {
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*publicUrl = *ip + ":" + strconv.Itoa(*vport)
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}
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if *volumeWhiteListOption != "" {
volumeWhiteList = strings.Split(*volumeWhiteListOption, ",")
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}
r := http.NewServeMux()
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weed_server.NewVolumeServer(r, *ip, *vport, *publicUrl, folders, maxCounts,
*masterNode, *vpulse, *dataCenter, *rack, volumeWhiteList,
)
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glog.V(0).Infoln("Start Weed volume server", util.VERSION, "at http://"+*ip+":"+strconv.Itoa(*vport))
listener, e := util.NewListener(
*ip+":"+strconv.Itoa(*vport),
time.Duration(*vTimeout)*time.Second,
)
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if e != nil {
glog.Fatalf(e.Error())
}
if e := http.Serve(listener, r); e != nil {
glog.Fatalf("Fail to serve:%s", e.Error())
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}
return true
}