mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-11-30 07:09:01 +08:00
105 lines
2.6 KiB
Go
105 lines
2.6 KiB
Go
package storage
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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_ "github.com/chrislusf/seaweedfs/weed/storage/backend/s3_backend"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
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"github.com/chrislusf/seaweedfs/weed/storage/backend"
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"github.com/golang/protobuf/jsonpb"
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)
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func (v *Volume) GetVolumeTierInfo() *volume_server_pb.VolumeTierInfo {
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return v.volumeTierInfo
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}
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func (v *Volume) maybeLoadVolumeTierInfo() bool {
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v.volumeTierInfo = &volume_server_pb.VolumeTierInfo{}
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tierFileName := v.FileName() + ".tier"
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if exists, canRead, _, _, _ := checkFile(tierFileName); !exists || !canRead {
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if !exists {
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return false
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}
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if !canRead {
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glog.Warningf("can not read %s", tierFileName)
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}
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return false
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}
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glog.V(0).Infof("maybeLoadVolumeTierInfo loading volume %d check file", v.Id)
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tierData, readErr := ioutil.ReadFile(tierFileName)
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if readErr != nil {
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glog.Warningf("fail to read %s : %v", tierFileName, readErr)
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return false
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}
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glog.V(0).Infof("maybeLoadVolumeTierInfo loading volume %d ReadFile", v.Id)
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if err := jsonpb.Unmarshal(bytes.NewReader(tierData), v.volumeTierInfo); err != nil {
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glog.Warningf("unmarshal error: %v", err)
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return false
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}
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glog.V(0).Infof("maybeLoadVolumeTierInfo loading volume %d Unmarshal tierInfo %v", v.Id, v.volumeTierInfo)
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if len(v.volumeTierInfo.GetFiles()) == 0 {
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return false
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}
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glog.V(0).Infof("volume %d is tiered to %s as %s and read only", v.Id,
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v.volumeTierInfo.Files[0].BackendName(), v.volumeTierInfo.Files[0].Key)
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v.readOnly = true
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glog.V(0).Infof("loading volume %d from remote %v", v.Id, v.volumeTierInfo.Files)
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v.LoadRemoteFile()
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return true
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}
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func (v *Volume) LoadRemoteFile() error {
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tierFile := v.volumeTierInfo.GetFiles()[0]
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backendStorage := backend.BackendStorages[tierFile.BackendName()]
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if v.DataBackend != nil {
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v.DataBackend.Close()
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}
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v.DataBackend = backendStorage.NewStorageFile(tierFile.Key, v.volumeTierInfo)
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return nil
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}
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func (v *Volume) SaveVolumeTierInfo() error {
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tierFileName := v.FileName() + ".tier"
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if exists, _, canWrite, _, _ := checkFile(tierFileName); exists && !canWrite {
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return fmt.Errorf("%s not writable", tierFileName)
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}
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m := jsonpb.Marshaler{
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EmitDefaults: true,
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Indent: " ",
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}
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text, marshalErr := m.MarshalToString(v.GetVolumeTierInfo())
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if marshalErr != nil {
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return fmt.Errorf("marshal volume %d tier info: %v", v.Id, marshalErr)
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}
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writeErr := ioutil.WriteFile(tierFileName, []byte(text), 0755)
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if writeErr != nil {
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return fmt.Errorf("fail to write %s : %v", tierFileName, writeErr)
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}
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return nil
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}
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