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space_manager.go
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space_manager.go
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// Copyright 2018 The Chubao Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
package datanode
import (
"fmt"
"sync"
"time"
"os"
"github.com/chubaofs/chubaofs/proto"
"github.com/chubaofs/chubaofs/raftstore"
"github.com/chubaofs/chubaofs/util"
"github.com/chubaofs/chubaofs/util/log"
)
// SpaceManager manages the disk space.
type SpaceManager struct {
clusterID string
disks map[string]*Disk
partitions map[uint64]*DataPartition
raftStore raftstore.RaftStore
nodeID uint64
diskMutex sync.RWMutex
partitionMutex sync.RWMutex
stats *Stats
stopC chan bool
selectedIndex int // TODO what is selected index
diskList []string
createPartitionMutex sync.RWMutex
}
// NewSpaceManager creates a new space manager.
func NewSpaceManager(rack string) *SpaceManager {
var space *SpaceManager
space = &SpaceManager{}
space.disks = make(map[string]*Disk)
space.diskList = make([]string, 0)
space.partitions = make(map[uint64]*DataPartition)
space.stats = NewStats(rack)
space.stopC = make(chan bool, 0)
go space.statUpdateScheduler()
return space
}
func (manager *SpaceManager) Stop() {
defer func() {
recover()
}()
close(manager.stopC)
}
func (manager *SpaceManager) SetNodeID(nodeID uint64) {
manager.nodeID = nodeID
}
func (manager *SpaceManager) GetNodeID() (nodeID uint64) {
return manager.nodeID
}
func (manager *SpaceManager) SetClusterID(clusterID string) {
manager.clusterID = clusterID
}
func (manager *SpaceManager) GetClusterID() (clusterID string) {
return manager.clusterID
}
func (manager *SpaceManager) SetRaftStore(raftStore raftstore.RaftStore) {
manager.raftStore = raftStore
}
func (manager *SpaceManager) GetRaftStore() (raftStore raftstore.RaftStore) {
return manager.raftStore
}
func (manager *SpaceManager) RangePartitions(f func(partition *DataPartition) bool) {
if f == nil {
return
}
manager.partitionMutex.RLock()
partitions := make([]*DataPartition, 0)
for _, dp := range manager.partitions {
partitions = append(partitions, dp)
}
manager.partitionMutex.RUnlock()
for _, partition := range partitions {
if !f(partition) {
break
}
}
}
func (manager *SpaceManager) GetDisks() (disks []*Disk) {
manager.diskMutex.RLock()
defer manager.diskMutex.RUnlock()
disks = make([]*Disk, 0)
for _, disk := range manager.disks {
disks = append(disks, disk)
}
return
}
func (manager *SpaceManager) Stats() *Stats {
return manager.stats
}
func (manager *SpaceManager) LoadDisk(path string, reservedSpace uint64, maxErrCnt int) (err error) {
var (
disk *Disk
visitor PartitionVisitor
)
log.LogDebugf("action[LoadDisk] load disk from path(%v).", path)
visitor = func(dp *DataPartition) {
manager.partitionMutex.Lock()
defer manager.partitionMutex.Unlock()
if _, has := manager.partitions[dp.partitionID]; !has {
manager.partitions[dp.partitionID] = dp
log.LogDebugf("action[LoadDisk] put partition(%v) to manager manager.", dp.partitionID)
}
}
if _, err = manager.GetDisk(path); err != nil {
disk = NewDisk(path, reservedSpace, maxErrCnt, manager)
disk.RestorePartition(visitor)
manager.putDisk(disk)
err = nil
}
return
}
func (manager *SpaceManager) GetDisk(path string) (d *Disk, err error) {
manager.diskMutex.RLock()
defer manager.diskMutex.RUnlock()
disk, has := manager.disks[path]
if has && disk != nil {
d = disk
return
}
err = fmt.Errorf("disk(%v) not exsit", path)
return
}
func (manager *SpaceManager) putDisk(d *Disk) {
manager.diskMutex.Lock()
manager.disks[d.Path] = d
manager.diskList = append(manager.diskList, d.Path)
manager.diskMutex.Unlock()
}
func (manager *SpaceManager) updateMetrics() {
manager.diskMutex.RLock()
var (
total, used, available uint64
totalPartitionSize, remainingCapacityToCreatePartition uint64
maxCapacityToCreatePartition, partitionCnt uint64
)
maxCapacityToCreatePartition = 0
for _, d := range manager.disks {
total += d.Total
used += d.Used
available += d.Available
totalPartitionSize += d.Allocated
remainingCapacityToCreatePartition += d.Unallocated
partitionCnt += uint64(d.PartitionCount())
if maxCapacityToCreatePartition < d.Unallocated {
maxCapacityToCreatePartition = d.Unallocated
}
}
manager.diskMutex.RUnlock()
log.LogDebugf("action[updateMetrics] total(%v) used(%v) available(%v) totalPartitionSize(%v) remainingCapacityToCreatePartition(%v) "+
"partitionCnt(%v) maxCapacityToCreatePartition(%v) ", total, used, available, totalPartitionSize, remainingCapacityToCreatePartition, partitionCnt, maxCapacityToCreatePartition)
manager.stats.updateMetrics(total, used, available, totalPartitionSize,
remainingCapacityToCreatePartition, maxCapacityToCreatePartition, partitionCnt)
}
func (manager *SpaceManager) minPartitionCnt() (d *Disk) {
manager.diskMutex.Lock()
defer manager.diskMutex.Unlock()
var path string
if manager.selectedIndex >= len(manager.diskList) {
manager.selectedIndex = 0
}
path = manager.diskList[manager.selectedIndex]
d = manager.disks[path]
manager.selectedIndex++
return
}
func (manager *SpaceManager) statUpdateScheduler() {
go func() {
ticker := time.NewTicker(10 * time.Second)
for {
select {
case <-ticker.C:
manager.updateMetrics()
case <-manager.stopC:
ticker.Stop()
return
}
}
}()
}
func (manager *SpaceManager) Partition(partitionID uint64) (dp *DataPartition) {
manager.partitionMutex.RLock()
defer manager.partitionMutex.RUnlock()
dp = manager.partitions[partitionID]
return
}
func (manager *SpaceManager) putPartition(dp *DataPartition) {
manager.partitionMutex.Lock()
defer manager.partitionMutex.Unlock()
manager.partitions[dp.partitionID] = dp
return
}
func (manager *SpaceManager) CreatePartition(request *proto.CreateDataPartitionRequest) (dp *DataPartition, err error) {
manager.partitionMutex.Lock()
defer manager.partitionMutex.Unlock()
dpCfg := &dataPartitionCfg{
PartitionID: request.PartitionId,
VolName: request.VolumeId,
Peers: request.Members,
RaftStore: manager.raftStore,
NodeID: manager.nodeID,
ClusterID: manager.clusterID,
PartitionSize: request.PartitionSize,
}
dp = manager.partitions[dpCfg.PartitionID]
if dp != nil {
return
}
var (
disk *Disk
)
for i := 0; i < len(manager.disks); i++ {
disk = manager.minPartitionCnt()
if disk.Available < 5*util.GB || disk.Status != proto.ReadWrite {
disk = nil
continue
}
break
}
if disk == nil {
return nil, ErrNoSpaceToCreatePartition
}
if dp, err = CreateDataPartition(dpCfg, disk); err != nil {
return
}
manager.partitions[dp.partitionID] = dp
return
}
// DeletePartition deletes a partition based on the partition id.
func (manager *SpaceManager) DeletePartition(dpID uint64) {
dp := manager.Partition(dpID)
if dp == nil {
return
}
manager.partitionMutex.Lock()
delete(manager.partitions, dpID)
manager.partitionMutex.Unlock()
dp.Stop()
dp.Disk().DetachDataPartition(dp)
os.RemoveAll(dp.Path())
}
func (s *DataNode) buildHeartBeatResponse(response *proto.DataNodeHeartbeatResponse) {
response.Status = proto.TaskSucceeds
stat := s.space.Stats()
stat.Lock()
response.Used = stat.Used
response.Total = stat.Total
response.Available = stat.Available
response.CreatedPartitionCnt = uint32(stat.CreatedPartitionCnt)
response.TotalPartitionSize = stat.TotalPartitionSize
response.MaxCapacity = stat.MaxCapacityToCreatePartition
response.RemainingCapacity = stat.RemainingCapacityToCreatePartition
stat.Unlock()
response.RackName = s.rackName
response.PartitionReports = make([]*proto.PartitionReport, 0)
space := s.space
space.RangePartitions(func(partition *DataPartition) bool {
leaderAddr, isLeader := partition.IsRaftLeader()
vr := &proto.PartitionReport{
VolName: partition.volumeID,
PartitionID: uint64(partition.partitionID),
PartitionStatus: partition.Status(),
Total: uint64(partition.Size()),
Used: uint64(partition.Used()),
DiskPath: partition.Disk().Path,
IsLeader: isLeader,
ExtentCount: partition.GetExtentCount(),
NeedCompare: true,
}
log.LogDebugf("action[Heartbeats] dpid[%v], status[%v] total[%v] used[%v] leader[%v] b[%v].", vr.PartitionID, vr.PartitionStatus, vr.Total, vr.Used, leaderAddr, vr.IsLeader)
response.PartitionReports = append(response.PartitionReports, vr)
return true
})
}