mirror of
https://github.com/seaweedfs/seaweedfs.git
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249 lines
7.4 KiB
Go
249 lines
7.4 KiB
Go
package filersink
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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/wdclient"
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"math"
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"google.golang.org/grpc"
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"github.com/chrislusf/seaweedfs/weed/security"
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"github.com/chrislusf/seaweedfs/weed/filer"
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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/chrislusf/seaweedfs/weed/replication/sink"
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"github.com/chrislusf/seaweedfs/weed/replication/source"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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type FilerSink struct {
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filerSource *source.FilerSource
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grpcAddress string
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dir string
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replication string
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collection string
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ttlSec int32
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diskType string
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dataCenter string
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grpcDialOption grpc.DialOption
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address string
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writeChunkByFiler bool
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isIncremental bool
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}
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func init() {
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sink.Sinks = append(sink.Sinks, &FilerSink{})
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}
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func (fs *FilerSink) GetName() string {
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return "filer"
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}
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func (fs *FilerSink) GetSinkToDirectory() string {
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return fs.dir
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}
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func (fs *FilerSink) IsIncremental() bool {
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return fs.isIncremental
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}
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func (fs *FilerSink) Initialize(configuration util.Configuration, prefix string) error {
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fs.isIncremental = configuration.GetBool(prefix + "is_incremental")
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return fs.DoInitialize(
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"",
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configuration.GetString(prefix+"grpcAddress"),
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configuration.GetString(prefix+"directory"),
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configuration.GetString(prefix+"replication"),
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configuration.GetString(prefix+"collection"),
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configuration.GetInt(prefix+"ttlSec"),
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configuration.GetString(prefix+"disk"),
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security.LoadClientTLS(util.GetViper(), "grpc.client"),
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false)
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}
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func (fs *FilerSink) SetSourceFiler(s *source.FilerSource) {
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fs.filerSource = s
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}
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func (fs *FilerSink) DoInitialize(address, grpcAddress string, dir string,
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replication string, collection string, ttlSec int, diskType string, grpcDialOption grpc.DialOption, writeChunkByFiler bool) (err error) {
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fs.address = address
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if fs.address == "" {
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fs.address = pb.GrpcAddressToServerAddress(grpcAddress)
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}
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fs.grpcAddress = grpcAddress
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fs.dir = dir
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fs.replication = replication
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fs.collection = collection
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fs.ttlSec = int32(ttlSec)
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fs.diskType = diskType
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fs.grpcDialOption = grpcDialOption
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fs.writeChunkByFiler = writeChunkByFiler
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return nil
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}
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func (fs *FilerSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool, signatures []int32) error {
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dir, name := util.FullPath(key).DirAndName()
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glog.V(4).Infof("delete entry: %v", key)
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err := filer_pb.Remove(fs, dir, name, deleteIncludeChunks, true, true, true, signatures)
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if err != nil {
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glog.V(0).Infof("delete entry %s: %v", key, err)
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return fmt.Errorf("delete entry %s: %v", key, err)
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}
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return nil
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}
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func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry, signatures []int32) error {
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return fs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
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dir, name := util.FullPath(key).DirAndName()
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// look up existing entry
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lookupRequest := &filer_pb.LookupDirectoryEntryRequest{
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Directory: dir,
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Name: name,
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}
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glog.V(1).Infof("lookup: %v", lookupRequest)
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if resp, err := filer_pb.LookupEntry(client, lookupRequest); err == nil {
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if filer.ETag(resp.Entry) == filer.ETag(entry) {
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glog.V(3).Infof("already replicated %s", key)
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return nil
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}
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}
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replicatedChunks, err := fs.replicateChunks(entry.Chunks, key)
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if err != nil {
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// only warning here since the source chunk may have been deleted already
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glog.Warningf("replicate entry chunks %s: %v", key, err)
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}
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glog.V(4).Infof("replicated %s %+v ===> %+v", key, entry.Chunks, replicatedChunks)
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request := &filer_pb.CreateEntryRequest{
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Directory: dir,
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Entry: &filer_pb.Entry{
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Name: name,
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IsDirectory: entry.IsDirectory,
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Attributes: entry.Attributes,
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Chunks: replicatedChunks,
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Content: entry.Content,
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RemoteEntry: entry.RemoteEntry,
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},
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IsFromOtherCluster: true,
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Signatures: signatures,
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}
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glog.V(3).Infof("create: %v", request)
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if err := filer_pb.CreateEntry(client, request); err != nil {
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glog.V(0).Infof("create entry %s: %v", key, err)
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return fmt.Errorf("create entry %s: %v", key, err)
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}
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return nil
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})
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}
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func (fs *FilerSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool, signatures []int32) (foundExistingEntry bool, err error) {
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dir, name := util.FullPath(key).DirAndName()
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// read existing entry
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var existingEntry *filer_pb.Entry
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err = fs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
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request := &filer_pb.LookupDirectoryEntryRequest{
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Directory: dir,
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Name: name,
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}
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glog.V(4).Infof("lookup entry: %v", request)
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resp, err := filer_pb.LookupEntry(client, request)
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if err != nil {
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glog.V(0).Infof("lookup %s: %v", key, err)
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return err
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}
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existingEntry = resp.Entry
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return nil
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})
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if err != nil {
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return false, fmt.Errorf("lookup %s: %v", key, err)
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}
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glog.V(4).Infof("oldEntry %+v, newEntry %+v, existingEntry: %+v", oldEntry, newEntry, existingEntry)
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if existingEntry.Attributes.Mtime > newEntry.Attributes.Mtime {
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// skip if already changed
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// this usually happens when the messages are not ordered
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glog.V(2).Infof("late updates %s", key)
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} else if filer.ETag(newEntry) == filer.ETag(existingEntry) {
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// skip if no change
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// this usually happens when retrying the replication
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glog.V(3).Infof("already replicated %s", key)
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} else {
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// find out what changed
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deletedChunks, newChunks, err := compareChunks(filer.LookupFn(fs), oldEntry, newEntry)
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if err != nil {
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return true, fmt.Errorf("replicte %s compare chunks error: %v", key, err)
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}
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// delete the chunks that are deleted from the source
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if deleteIncludeChunks {
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// remove the deleted chunks. Actual data deletion happens in filer UpdateEntry FindUnusedFileChunks
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existingEntry.Chunks = filer.DoMinusChunks(existingEntry.Chunks, deletedChunks)
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}
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// replicate the chunks that are new in the source
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replicatedChunks, err := fs.replicateChunks(newChunks, key)
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if err != nil {
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return true, fmt.Errorf("replicte %s chunks error: %v", key, err)
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}
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existingEntry.Chunks = append(existingEntry.Chunks, replicatedChunks...)
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}
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// save updated meta data
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return true, fs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
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request := &filer_pb.UpdateEntryRequest{
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Directory: newParentPath,
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Entry: existingEntry,
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IsFromOtherCluster: true,
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Signatures: signatures,
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}
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if _, err := client.UpdateEntry(context.Background(), request); err != nil {
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return fmt.Errorf("update existingEntry %s: %v", key, err)
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}
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return nil
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})
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}
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func compareChunks(lookupFileIdFn wdclient.LookupFileIdFunctionType, oldEntry, newEntry *filer_pb.Entry) (deletedChunks, newChunks []*filer_pb.FileChunk, err error) {
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aData, aMeta, aErr := filer.ResolveChunkManifest(lookupFileIdFn, oldEntry.Chunks, 0, math.MaxInt64)
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if aErr != nil {
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return nil, nil, aErr
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}
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bData, bMeta, bErr := filer.ResolveChunkManifest(lookupFileIdFn, newEntry.Chunks, 0, math.MaxInt64)
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if bErr != nil {
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return nil, nil, bErr
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}
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deletedChunks = append(deletedChunks, filer.DoMinusChunks(aData, bData)...)
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deletedChunks = append(deletedChunks, filer.DoMinusChunks(aMeta, bMeta)...)
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newChunks = append(newChunks, filer.DoMinusChunks(bData, aData)...)
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newChunks = append(newChunks, filer.DoMinusChunks(bMeta, aMeta)...)
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return
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}
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