package manager
import (
"net/http"
"github.com/030io/whalefs/manager/volume"
"os"
"io/ioutil"
"strings"
"strconv"
"fmt"
"time"
"github.com/030io/whalefs/master/api"
"github.com/030io/whalefs/master"
"github.com/030io/whalefs/utils/disk"
)
var (
MaxDiskUsedPercent uint = 99
HeartbeatDuration time.Duration = time.Second * 5
ReadOnly bool = false
DefaultExpires = time.Minute * 30
)
type VolumeManager struct { DataDir string
Volumes map[uint64]*volume.Volume
AdminPort int
AdminHost string
PublicPort int
PublicHost string
AdminServer *http.ServeMux
PublicServer *http.ServeMux
Machine string
DataCenter string
MasterHost string
MasterPort int
}
func NewVolumeManager(dir string) (*VolumeManager, error) { f, err := os.OpenFile(dir, os.O_RDWR, 0)
if os.IsNotExist(err) { panic(err)
} else if os.IsPermission(err) { ReadOnly = true
}
f.Close()
vm := new(VolumeManager)
vm.DataDir = dir
fileInfos, err := ioutil.ReadDir(dir)
if err != nil { panic(err)
}
vm.Volumes = make(map[uint64]*volume.Volume)
for _, fi := range fileInfos { fileName := fi.Name()
if strings.HasSuffix(fileName, ".data") { vid, err := strconv.ParseUint(fileName[:len(fileName) - 5], 10, 64)
if err != nil { panic(err)
}
vm.Volumes[vid], err = volume.NewVolume(dir, vid)
if err != nil { panic(err)
}
}
}
vm.AdminPort = 7800
vm.AdminHost = "localhost"
vm.PublicPort = 7900
vm.PublicHost = "localhost"
vm.AdminServer = http.NewServeMux()
vm.PublicServer = http.NewServeMux()
vm.PublicServer.HandleFunc("/", vm.publicEntry) vm.AdminServer.HandleFunc("/", vm.adminEntry) vm.MasterHost = "localhost"
vm.MasterPort = 8888
return vm, nil
}
func (vm *VolumeManager)Start() { go vm.Heartbeat()
go func() { err := http.ListenAndServe(fmt.Sprintf("0.0.0.0:%d", vm.AdminPort), vm.AdminServer) if err != nil { panic(err)
}
}()
err := http.ListenAndServe(fmt.Sprintf("0.0.0.0:%d", vm.PublicPort), vm.PublicServer) if err != nil { panic(err)
}
}
func (vm *VolumeManager)Stop() { for _, v := range vm.Volumes { v.Close()
}
}
func (vm *VolumeManager)Heartbeat() { tick := time.NewTicker(HeartbeatDuration)
defer tick.Stop()
for { vms := new(master.VolumeManagerStatus)
vms.AdminHost = vm.AdminHost
vms.AdminPort = vm.AdminPort
vms.PublicHost = vm.PublicHost
vms.PublicPort = vm.PublicPort
vms.Machine = vm.Machine
vms.DataCenter = vm.Machine
vms.VStatusList = make([]*master.VolumeStatus, 0, len(vm.Volumes))
diskUsage, _ := disk.DiskUsage(vm.DataDir)
vms.DiskSize = diskUsage.Size
vms.DiskUsed = diskUsage.Used
vms.DiskFree = diskUsage.Free
vms.MaxDiskUsed = diskUsage.Size / 100 * uint64(MaxDiskUsedPercent)
vms.VolumeMaxSize = volume.MaxVolumeSize
diskUsedPercent := uint(float64(diskUsage.Used) / float64(diskUsage.Size) * 100)
if ReadOnly || diskUsedPercent >= MaxDiskUsedPercent { //禁止所有volume再进行truncate
volume.MaxVolumeSize = 0
vms.CanCreateVolume = false
} else { vms.CanCreateVolume = true
}
for vid, v := range vm.Volumes { vs := new(master.VolumeStatus)
vs.Id = vid
vs.DataFileSize = v.GetDatafileSize()
vs.Writable = !ReadOnly && v.WriteAble
vs.MaxFreeSpace = v.GetMaxFreeSpace()
vms.VStatusList = append(vms.VStatusList, vs)
}
api.Heartbeat(vm.MasterHost, vm.MasterPort, vms)
<-tick.C
}
}