seaweedfs/weed/replication/sink/filersink/filer_sink.go
chrislu b463ca1a2f filer replication: compare content changes directly
Fix https://github.com/seaweedfs/seaweedfs/issues/3714

The destination chunks may be empty. For example, the file is updated and the volume is vacuumed. In this case, the sync would miss the old chunks. This is fine. However, the entry would have correct metadata but missing chunks.

For this case, the simple metadata comparison would be wrongly skipping data changes, and the file will stay empty unless file content md5 is changed.
2022-09-20 08:35:10 -07:00

253 lines
7.6 KiB
Go

package filersink
import (
"context"
"fmt"
"github.com/seaweedfs/seaweedfs/weed/pb"
"github.com/seaweedfs/seaweedfs/weed/wdclient"
"math"
"google.golang.org/grpc"
"github.com/seaweedfs/seaweedfs/weed/security"
"github.com/seaweedfs/seaweedfs/weed/filer"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/seaweedfs/weed/replication/sink"
"github.com/seaweedfs/seaweedfs/weed/replication/source"
"github.com/seaweedfs/seaweedfs/weed/util"
)
type FilerSink struct {
filerSource *source.FilerSource
grpcAddress string
dir string
replication string
collection string
ttlSec int32
diskType string
dataCenter string
grpcDialOption grpc.DialOption
address string
writeChunkByFiler bool
isIncremental bool
}
func init() {
sink.Sinks = append(sink.Sinks, &FilerSink{})
}
func (fs *FilerSink) GetName() string {
return "filer"
}
func (fs *FilerSink) GetSinkToDirectory() string {
return fs.dir
}
func (fs *FilerSink) IsIncremental() bool {
return fs.isIncremental
}
func (fs *FilerSink) Initialize(configuration util.Configuration, prefix string) error {
fs.isIncremental = configuration.GetBool(prefix + "is_incremental")
fs.dataCenter = configuration.GetString(prefix + "dataCenter")
return fs.DoInitialize(
"",
configuration.GetString(prefix+"grpcAddress"),
configuration.GetString(prefix+"directory"),
configuration.GetString(prefix+"replication"),
configuration.GetString(prefix+"collection"),
configuration.GetInt(prefix+"ttlSec"),
configuration.GetString(prefix+"disk"),
security.LoadClientTLS(util.GetViper(), "grpc.client"),
false)
}
func (fs *FilerSink) SetSourceFiler(s *source.FilerSource) {
fs.filerSource = s
}
func (fs *FilerSink) DoInitialize(address, grpcAddress string, dir string,
replication string, collection string, ttlSec int, diskType string, grpcDialOption grpc.DialOption, writeChunkByFiler bool) (err error) {
fs.address = address
if fs.address == "" {
fs.address = pb.GrpcAddressToServerAddress(grpcAddress)
}
fs.grpcAddress = grpcAddress
fs.dir = dir
fs.replication = replication
fs.collection = collection
fs.ttlSec = int32(ttlSec)
fs.diskType = diskType
fs.grpcDialOption = grpcDialOption
fs.writeChunkByFiler = writeChunkByFiler
return nil
}
func (fs *FilerSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool, signatures []int32) error {
dir, name := util.FullPath(key).DirAndName()
glog.V(4).Infof("delete entry: %v", key)
err := filer_pb.Remove(fs, dir, name, deleteIncludeChunks, true, true, true, signatures)
if err != nil {
glog.V(0).Infof("delete entry %s: %v", key, err)
return fmt.Errorf("delete entry %s: %v", key, err)
}
return nil
}
func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry, signatures []int32) error {
return fs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
dir, name := util.FullPath(key).DirAndName()
// look up existing entry
lookupRequest := &filer_pb.LookupDirectoryEntryRequest{
Directory: dir,
Name: name,
}
glog.V(1).Infof("lookup: %v", lookupRequest)
if resp, err := filer_pb.LookupEntry(client, lookupRequest); err == nil {
if filer.ETag(resp.Entry) == filer.ETag(entry) {
glog.V(3).Infof("already replicated %s", key)
return nil
}
}
replicatedChunks, err := fs.replicateChunks(entry.Chunks, key)
if err != nil {
// only warning here since the source chunk may have been deleted already
glog.Warningf("replicate entry chunks %s: %v", key, err)
}
glog.V(4).Infof("replicated %s %+v ===> %+v", key, entry.Chunks, replicatedChunks)
request := &filer_pb.CreateEntryRequest{
Directory: dir,
Entry: &filer_pb.Entry{
Name: name,
IsDirectory: entry.IsDirectory,
Attributes: entry.Attributes,
Extended: entry.Extended,
Chunks: replicatedChunks,
Content: entry.Content,
RemoteEntry: entry.RemoteEntry,
},
IsFromOtherCluster: true,
Signatures: signatures,
}
glog.V(3).Infof("create: %v", request)
if err := filer_pb.CreateEntry(client, request); err != nil {
glog.V(0).Infof("create entry %s: %v", key, err)
return fmt.Errorf("create entry %s: %v", key, err)
}
return nil
})
}
func (fs *FilerSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool, signatures []int32) (foundExistingEntry bool, err error) {
dir, name := util.FullPath(key).DirAndName()
// read existing entry
var existingEntry *filer_pb.Entry
err = fs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.LookupDirectoryEntryRequest{
Directory: dir,
Name: name,
}
glog.V(4).Infof("lookup entry: %v", request)
resp, err := filer_pb.LookupEntry(client, request)
if err != nil {
glog.V(0).Infof("lookup %s: %v", key, err)
return err
}
existingEntry = resp.Entry
return nil
})
if err != nil {
return false, fmt.Errorf("lookup %s: %v", key, err)
}
glog.V(4).Infof("oldEntry %+v, newEntry %+v, existingEntry: %+v", oldEntry, newEntry, existingEntry)
if existingEntry.Attributes.Mtime > newEntry.Attributes.Mtime {
// skip if already changed
// this usually happens when the messages are not ordered
glog.V(2).Infof("late updates %s", key)
} else {
// find out what changed
deletedChunks, newChunks, err := compareChunks(filer.LookupFn(fs), oldEntry, newEntry)
if err != nil {
return true, fmt.Errorf("replicate %s compare chunks error: %v", key, err)
}
// delete the chunks that are deleted from the source
if deleteIncludeChunks {
// remove the deleted chunks. Actual data deletion happens in filer UpdateEntry FindUnusedFileChunks
existingEntry.Chunks = filer.DoMinusChunksBySourceFileId(existingEntry.Chunks, deletedChunks)
}
// replicate the chunks that are new in the source
replicatedChunks, err := fs.replicateChunks(newChunks, key)
if err != nil {
return true, fmt.Errorf("replicate %s chunks error: %v", key, err)
}
existingEntry.Chunks = append(existingEntry.Chunks, replicatedChunks...)
existingEntry.Attributes = newEntry.Attributes
existingEntry.Extended = newEntry.Extended
existingEntry.HardLinkId = newEntry.HardLinkId
existingEntry.HardLinkCounter = newEntry.HardLinkCounter
existingEntry.Content = newEntry.Content
existingEntry.RemoteEntry = newEntry.RemoteEntry
}
// save updated meta data
return true, fs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.UpdateEntryRequest{
Directory: newParentPath,
Entry: existingEntry,
IsFromOtherCluster: true,
Signatures: signatures,
}
if _, err := client.UpdateEntry(context.Background(), request); err != nil {
return fmt.Errorf("update existingEntry %s: %v", key, err)
}
return nil
})
}
func compareChunks(lookupFileIdFn wdclient.LookupFileIdFunctionType, oldEntry, newEntry *filer_pb.Entry) (deletedChunks, newChunks []*filer_pb.FileChunk, err error) {
aData, aMeta, aErr := filer.ResolveChunkManifest(lookupFileIdFn, oldEntry.Chunks, 0, math.MaxInt64)
if aErr != nil {
return nil, nil, aErr
}
bData, bMeta, bErr := filer.ResolveChunkManifest(lookupFileIdFn, newEntry.Chunks, 0, math.MaxInt64)
if bErr != nil {
return nil, nil, bErr
}
deletedChunks = append(deletedChunks, filer.DoMinusChunks(aData, bData)...)
deletedChunks = append(deletedChunks, filer.DoMinusChunks(aMeta, bMeta)...)
newChunks = append(newChunks, filer.DoMinusChunks(bData, aData)...)
newChunks = append(newChunks, filer.DoMinusChunks(bMeta, aMeta)...)
return
}