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https://github.com/chrislusf/seaweedfs
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streaming mode would create separate grpc connections for each call. this is to ensure the long poll connections are properly closed.
182 lines
5.8 KiB
Go
182 lines
5.8 KiB
Go
package filer
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import (
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"context"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/pb"
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"github.com/chrislusf/seaweedfs/weed/pb/remote_pb"
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"github.com/chrislusf/seaweedfs/weed/remote_storage"
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"github.com/chrislusf/seaweedfs/weed/util"
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"github.com/golang/protobuf/proto"
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"google.golang.org/grpc"
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"math"
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"strings"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/viant/ptrie"
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)
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const REMOTE_STORAGE_CONF_SUFFIX = ".conf"
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const REMOTE_STORAGE_MOUNT_FILE = "mount.mapping"
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type FilerRemoteStorage struct {
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rules ptrie.Trie
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storageNameToConf map[string]*remote_pb.RemoteConf
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}
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func NewFilerRemoteStorage() (rs *FilerRemoteStorage) {
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rs = &FilerRemoteStorage{
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rules: ptrie.New(),
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storageNameToConf: make(map[string]*remote_pb.RemoteConf),
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}
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return rs
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}
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func (rs *FilerRemoteStorage) LoadRemoteStorageConfigurationsAndMapping(filer *Filer) (err error) {
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// execute this on filer
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limit := int64(math.MaxInt32)
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entries, _, err := filer.ListDirectoryEntries(context.Background(), DirectoryEtcRemote, "", false, limit, "", "", "")
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if err != nil {
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if err == filer_pb.ErrNotFound {
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return nil
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}
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glog.Errorf("read remote storage %s: %v", DirectoryEtcRemote, err)
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return
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}
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for _, entry := range entries {
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if entry.Name() == REMOTE_STORAGE_MOUNT_FILE {
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if err := rs.loadRemoteStorageMountMapping(entry.Content); err != nil {
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return err
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}
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continue
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}
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if !strings.HasSuffix(entry.Name(), REMOTE_STORAGE_CONF_SUFFIX) {
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return nil
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}
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conf := &remote_pb.RemoteConf{}
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if err := proto.Unmarshal(entry.Content, conf); err != nil {
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return fmt.Errorf("unmarshal %s/%s: %v", DirectoryEtcRemote, entry.Name(), err)
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}
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rs.storageNameToConf[conf.Name] = conf
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}
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return nil
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}
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func (rs *FilerRemoteStorage) loadRemoteStorageMountMapping(data []byte) (err error) {
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mappings := &remote_pb.RemoteStorageMapping{}
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if err := proto.Unmarshal(data, mappings); err != nil {
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return fmt.Errorf("unmarshal %s/%s: %v", DirectoryEtcRemote, REMOTE_STORAGE_MOUNT_FILE, err)
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}
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for dir, storageLocation := range mappings.Mappings {
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rs.mapDirectoryToRemoteStorage(util.FullPath(dir), storageLocation)
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}
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return nil
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}
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func (rs *FilerRemoteStorage) mapDirectoryToRemoteStorage(dir util.FullPath, loc *remote_pb.RemoteStorageLocation) {
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rs.rules.Put([]byte(dir+"/"), loc)
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}
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func (rs *FilerRemoteStorage) FindMountDirectory(p util.FullPath) (mountDir util.FullPath, remoteLocation *remote_pb.RemoteStorageLocation) {
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rs.rules.MatchPrefix([]byte(p), func(key []byte, value interface{}) bool {
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mountDir = util.FullPath(string(key[:len(key)-1]))
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remoteLocation = value.(*remote_pb.RemoteStorageLocation)
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return true
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})
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return
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}
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func (rs *FilerRemoteStorage) FindRemoteStorageClient(p util.FullPath) (client remote_storage.RemoteStorageClient, remoteConf *remote_pb.RemoteConf, found bool) {
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var storageLocation *remote_pb.RemoteStorageLocation
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rs.rules.MatchPrefix([]byte(p), func(key []byte, value interface{}) bool {
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storageLocation = value.(*remote_pb.RemoteStorageLocation)
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return true
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})
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if storageLocation == nil {
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found = false
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return
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}
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return rs.GetRemoteStorageClient(storageLocation.Name)
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}
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func (rs *FilerRemoteStorage) GetRemoteStorageClient(storageName string) (client remote_storage.RemoteStorageClient, remoteConf *remote_pb.RemoteConf, found bool) {
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remoteConf, found = rs.storageNameToConf[storageName]
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if !found {
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return
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}
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var err error
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if client, err = remote_storage.GetRemoteStorage(remoteConf); err == nil {
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found = true
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return
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}
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return
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}
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func UnmarshalRemoteStorageMappings(oldContent []byte) (mappings *remote_pb.RemoteStorageMapping, err error) {
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mappings = &remote_pb.RemoteStorageMapping{
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Mappings: make(map[string]*remote_pb.RemoteStorageLocation),
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}
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if len(oldContent) > 0 {
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if err = proto.Unmarshal(oldContent, mappings); err != nil {
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glog.Warningf("unmarshal existing mappings: %v", err)
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}
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}
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return
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}
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func ReadRemoteStorageConf(grpcDialOption grpc.DialOption, filerAddress pb.ServerAddress, storageName string) (conf *remote_pb.RemoteConf, readErr error) {
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var oldContent []byte
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if readErr = pb.WithFilerClient(false, filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
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oldContent, readErr = ReadInsideFiler(client, DirectoryEtcRemote, storageName+REMOTE_STORAGE_CONF_SUFFIX)
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return readErr
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}); readErr != nil {
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return nil, readErr
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}
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// unmarshal storage configuration
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conf = &remote_pb.RemoteConf{}
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if unMarshalErr := proto.Unmarshal(oldContent, conf); unMarshalErr != nil {
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readErr = fmt.Errorf("unmarshal %s/%s: %v", DirectoryEtcRemote, storageName+REMOTE_STORAGE_CONF_SUFFIX, unMarshalErr)
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return
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}
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return
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}
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func DetectMountInfo(grpcDialOption grpc.DialOption, filerAddress pb.ServerAddress, dir string) (*remote_pb.RemoteStorageMapping, string, *remote_pb.RemoteStorageLocation, *remote_pb.RemoteConf, error) {
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mappings, listErr := ReadMountMappings(grpcDialOption, filerAddress)
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if listErr != nil {
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return nil, "", nil, nil, listErr
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}
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if dir == "" {
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return mappings, "", nil, nil, fmt.Errorf("need to specify '-dir' option")
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}
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var localMountedDir string
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var remoteStorageMountedLocation *remote_pb.RemoteStorageLocation
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for k, loc := range mappings.Mappings {
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if strings.HasPrefix(dir, k) {
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localMountedDir, remoteStorageMountedLocation = k, loc
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}
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}
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if localMountedDir == "" {
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return mappings, localMountedDir, remoteStorageMountedLocation, nil, fmt.Errorf("%s is not mounted", dir)
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}
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// find remote storage configuration
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remoteStorageConf, err := ReadRemoteStorageConf(grpcDialOption, filerAddress, remoteStorageMountedLocation.Name)
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if err != nil {
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return mappings, localMountedDir, remoteStorageMountedLocation, remoteStorageConf, err
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}
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return mappings, localMountedDir, remoteStorageMountedLocation, remoteStorageConf, nil
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}
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