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filer: able to tail meta data changes

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This commit is contained in:
Chris Lu 2020-04-05 00:51:16 -07:00
parent 2a2d92d06e
commit bf270d9e8c
11 changed files with 368 additions and 181 deletions
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2
other/java/client/src/main/proto/filer.proto
View file

@ -237,7 +237,7 @@ message GetFilerConfigurationResponse {
message ListenForEventsRequest {
string client_name = 1;
string directory = 2;
int64 since_sec = 3;
int64 since_ns = 3;
}
message FullEventNotification {
string directory = 1;

19
weed/command/command.go
View file

@ -12,21 +12,22 @@ var Commands = []*Command{
cmdBackup,
cmdCompact,
cmdCopy,
cmdFix,
cmdFilerReplicate,
cmdServer,
cmdMaster,
cmdFiler,
cmdS3,
cmdUpload,
cmdDownload,
cmdExport,
cmdFiler,
cmdFilerReplicate,
cmdFix,
cmdMaster,
cmdMount,
cmdS3,
cmdMsgBroker,
cmdScaffold,
cmdServer,
cmdShell,
cmdTail,
cmdUpload,
cmdVersion,
cmdVolume,
cmdExport,
cmdMount,
cmdWebDav,
}

63
weed/command/tail.go Normal file
View file

@ -0,0 +1,63 @@
package command
import (
"context"
"fmt"
"io"
"github.com/chrislusf/seaweedfs/weed/pb"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/security"
"github.com/chrislusf/seaweedfs/weed/util"
)
func init() {
cmdTail.Run = runTail // break init cycle
}
var cmdTail = &Command{
UsageLine: "tail <wip> [-filer=localhost:8888]",
Short: "see recent changes on a filer",
Long: `See recent changes on a filer.
`,
}
var (
tailFiler = cmdTail.Flag.String("filer", "localhost:8888", "filer hostname:port")
tailTarget = cmdTail.Flag.String("target", "/", "a folder or file on filer")
)
func runTail(cmd *Command, args []string) bool {
grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client")
tailErr := pb.WithFilerClient(*tailFiler, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
stream, err := client.ListenForEvents(context.Background(), &filer_pb.ListenForEventsRequest{
ClientName: "tail",
Directory: *tailTarget,
SinceNs: 0,
})
if err != nil {
return fmt.Errorf("listen: %v", err)
}
for {
resp, listenErr := stream.Recv()
if listenErr == io.EOF {
return nil
}
if listenErr != nil {
return listenErr
}
fmt.Printf("events: %+v\n", resp.EventNotification)
}
})
if tailErr != nil {
fmt.Printf("tail %s: %v\n", *tailFiler, tailErr)
}
return true
}

4
weed/filer2/filer.go
View file

@ -39,14 +39,14 @@ type Filer struct {
metaLogBuffer *queue.LogBuffer
}
func NewFiler(masters []string, grpcDialOption grpc.DialOption, filerGrpcPort uint32) *Filer {
func NewFiler(masters []string, grpcDialOption grpc.DialOption, filerGrpcPort uint32, notifyFn func()) *Filer {
f := &Filer{
directoryCache: ccache.New(ccache.Configure().MaxSize(1000).ItemsToPrune(100)),
MasterClient: wdclient.NewMasterClient(grpcDialOption, "filer", filerGrpcPort, masters),
fileIdDeletionQueue: util.NewUnboundedQueue(),
GrpcDialOption: grpcDialOption,
}
f.metaLogBuffer = queue.NewLogBuffer(time.Minute, f.logFlushFunc)
f.metaLogBuffer = queue.NewLogBuffer(time.Minute, f.logFlushFunc, notifyFn)
go f.loopProcessingDeletion()

37
weed/filer2/filer_notify.go
View file

@ -77,3 +77,40 @@ func (f *Filer) logFlushFunc(startTime, stopTime time.Time, buf []byte) {
}
}
func (f *Filer) ReadLogBuffer(lastReadTime time.Time, eachEventFn func(fullpath string, eventNotification *filer_pb.EventNotification) error) (newLastReadTime time.Time, err error) {
var buf []byte
newLastReadTime, buf = f.metaLogBuffer.ReadFromBuffer(lastReadTime)
for pos := 0; pos+4 < len(buf); {
size := util.BytesToUint32(buf[pos : pos+4])
entryData := buf[pos+4 : pos+4+int(size)]
logEntry := &filer_pb.LogEntry{}
err = proto.Unmarshal(entryData, logEntry)
if err != nil {
glog.Errorf("unexpected unmarshal filer_pb.LogEntry: %v", err)
return lastReadTime, fmt.Errorf("unexpected unmarshal filer_pb.LogEntry: %v", err)
}
event := &filer_pb.FullEventNotification{}
err = proto.Unmarshal(logEntry.Data, event)
if err != nil {
glog.Errorf("unexpected unmarshal filer_pb.FullEventNotification: %v", err)
return lastReadTime, fmt.Errorf("unexpected unmarshal filer_pb.FullEventNotification: %v", err)
}
err = eachEventFn(event.Directory, event.EventNotification)
if err != nil {
return
}
pos += 4 + int(size)
}
return
}

19
weed/operation/grpc_client.go
View file

@ -9,6 +9,7 @@ import (
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
)
@ -17,7 +18,7 @@ func WithVolumeServerClient(volumeServer string, grpcDialOption grpc.DialOption,
grpcAddress, err := toVolumeServerGrpcAddress(volumeServer)
if err != nil {
return err
return fmt.Errorf("failed to parse volume server %v: %v", volumeServer, err)
}
return pb.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
@ -41,7 +42,7 @@ func WithMasterServerClient(masterServer string, grpcDialOption grpc.DialOption,
masterGrpcAddress, parseErr := pb.ParseServerToGrpcAddress(masterServer)
if parseErr != nil {
return fmt.Errorf("failed to parse master grpc %v: %v", masterServer, parseErr)
return fmt.Errorf("failed to parse master %v: %v", masterServer, parseErr)
}
return pb.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
@ -50,3 +51,17 @@ func WithMasterServerClient(masterServer string, grpcDialOption grpc.DialOption,
}, masterGrpcAddress, grpcDialOption)
}
func WithFilerServerClient(filerServer string, grpcDialOption grpc.DialOption, fn func(masterClient filer_pb.SeaweedFilerClient) error) error {
filerGrpcAddress, parseErr := pb.ParseServerToGrpcAddress(filerServer)
if parseErr != nil {
return fmt.Errorf("failed to parse filer %v: %v", filerGrpcAddress, parseErr)
}
return pb.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
client := filer_pb.NewSeaweedFilerClient(grpcConnection)
return fn(client)
}, filerGrpcAddress, grpcDialOption)
}

2
weed/pb/filer.proto
View file

@ -237,7 +237,7 @@ message GetFilerConfigurationResponse {
message ListenForEventsRequest {
string client_name = 1;
string directory = 2;
int64 since_sec = 3;
int64 since_ns = 3;
}
message FullEventNotification {
string directory = 1;

242
weed/pb/filer_pb/filer.pb.go
View file

@ -1093,7 +1093,7 @@ func (m *GetFilerConfigurationResponse) GetCipher() bool {
type ListenForEventsRequest struct {
ClientName string `protobuf:"bytes,1,opt,name=client_name,json=clientName" json:"client_name,omitempty"`
Directory string `protobuf:"bytes,2,opt,name=directory" json:"directory,omitempty"`
SinceSec int64 `protobuf:"varint,3,opt,name=since_sec,json=sinceSec" json:"since_sec,omitempty"`
SinceNs int64 `protobuf:"varint,3,opt,name=since_ns,json=sinceNs" json:"since_ns,omitempty"`
}
func (m *ListenForEventsRequest) Reset() { *m = ListenForEventsRequest{} }
@ -1115,9 +1115,9 @@ func (m *ListenForEventsRequest) GetDirectory() string {
return ""
}
func (m *ListenForEventsRequest) GetSinceSec() int64 {
func (m *ListenForEventsRequest) GetSinceNs() int64 {
if m != nil {
return m.SinceSec
return m.SinceNs
}
return 0
}
@ -1709,122 +1709,122 @@ func init() { proto.RegisterFile("filer.proto", fileDescriptor0) }
var fileDescriptor0 = []byte{
// 1901 bytes of a gzipped FileDescriptorProto
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}

82
weed/queue/log_buffer.go
View file

@ -6,28 +6,32 @@ import (
"github.com/golang/protobuf/proto"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
)
type LogBuffer struct {
buf []byte
idx []int
pos int
startTime time.Time
stopTime time.Time
sizeBuf []byte
flushInterval time.Duration
flushFn func(startTime, stopTime time.Time, buf []byte)
notifyFn func()
isStopping bool
sync.Mutex
sync.RWMutex
}
func NewLogBuffer(flushInterval time.Duration, flushFn func(startTime, stopTime time.Time, buf []byte)) *LogBuffer {
func NewLogBuffer(flushInterval time.Duration, flushFn func(startTime, stopTime time.Time, buf []byte), notifyFn func()) *LogBuffer {
lb := &LogBuffer{
buf: make([]byte, 4*0124*1024),
sizeBuf: make([]byte, 4),
flushInterval: flushInterval,
flushFn: flushFn,
notifyFn: notifyFn,
}
go lb.loopFlush()
return lb
@ -46,7 +50,12 @@ func (m *LogBuffer) AddToBuffer(ts time.Time, key, data []byte) {
size := len(logEntryData)
m.Lock()
defer m.Unlock()
defer func() {
m.Unlock()
if m.notifyFn != nil {
m.notifyFn()
}
}()
if m.pos == 0 {
m.startTime = ts
@ -55,12 +64,15 @@ func (m *LogBuffer) AddToBuffer(ts time.Time, key, data []byte) {
if m.startTime.Add(m.flushInterval).Before(ts) || len(m.buf)-m.pos < size+4 {
m.flush()
m.startTime = ts
if len(m.buf) < size+4 {
m.buf = make([]byte, 2*size+4)
}
}
m.stopTime = ts
m.idx = append(m.idx, m.pos)
util.Uint32toBytes(m.sizeBuf, uint32(size))
copy(m.buf[m.pos:m.pos+4], m.sizeBuf)
copy(m.buf[m.pos+4:m.pos+4+size], logEntryData)
m.pos += size + 4
}
@ -88,5 +100,67 @@ func (m *LogBuffer) flush() {
if m.flushFn != nil && m.pos > 0 {
m.flushFn(m.startTime, m.stopTime, m.buf[:m.pos])
m.pos = 0
m.idx = m.idx[:0]
}
}
func (m *LogBuffer) ReadFromBuffer(lastReadTime time.Time) (ts time.Time, bufferCopy []byte) {
m.RLock()
defer m.RUnlock()
// fmt.Printf("read from buffer: %v\n", lastReadTime)
if lastReadTime.Equal(m.stopTime) {
return lastReadTime, nil
}
if lastReadTime.After(m.stopTime) {
// glog.Fatalf("unexpected last read time %v, older than latest %v", lastReadTime, m.stopTime)
return lastReadTime, nil
}
if lastReadTime.Before(m.startTime) {
return m.stopTime, copiedBytes(m.buf[:m.pos])
}
lastTs := lastReadTime.UnixNano()
l, h := 0, len(m.idx)-1
// fmt.Printf("l=%d, h=%d\n", l, h)
for {
mid := (l + h) / 2
pos := m.idx[mid]
t := readTs(m.buf, m.idx[mid])
if t <= lastTs {
l = mid + 1
} else if lastTs < t {
var prevT int64
if mid > 0 {
prevT = readTs(m.buf, m.idx[mid-1])
}
if prevT <= lastTs {
return time.Unix(0, t), copiedBytes(m.buf[pos:m.pos])
}
h = mid - 1
}
// fmt.Printf("l=%d, h=%d\n", l, h)
}
}
func copiedBytes(buf []byte) (copied []byte) {
copied = make([]byte, len(buf))
copy(copied, buf)
return
}
func readTs(buf []byte, pos int) int64 {
size := util.BytesToUint32(buf[pos : pos+4])
entryData := buf[pos+4 : pos+4+int(size)]
logEntry := &filer_pb.LogEntry{}
err := proto.Unmarshal(entryData, logEntry)
if err != nil {
glog.Fatalf("unexpected unmarshal filer_pb.LogEntry: %v", err)
}
return logEntry.TsNs
}

71
weed/server/filer_grpc_server_listen.go
View file

@ -1,6 +1,9 @@
package weed_server
import (
"strings"
"time"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
)
@ -9,62 +12,56 @@ func (fs *FilerServer) ListenForEvents(req *filer_pb.ListenForEventsRequest, str
peerAddress := findClientAddress(stream.Context(), 0)
clientName, messageChan := fs.addClient(req.ClientName, peerAddress)
clientName := fs.addClient(req.ClientName, peerAddress)
defer fs.deleteClient(clientName, messageChan)
defer fs.deleteClient(clientName)
// ts := time.Unix(req.SinceSec, 0)
lastReadTime := time.Now()
if req.SinceNs > 0 {
lastReadTime = time.Unix(0, req.SinceNs)
}
var readErr error
for {
// iterate through old messages
/*
for _, message := range ms.Topo.ToVolumeLocations() {
lastReadTime, readErr = fs.filer.ReadLogBuffer(lastReadTime, func(fullpath string, eventNotification *filer_pb.EventNotification) error {
if strings.HasPrefix(fullpath, "/.meta") {
return nil
}
if !strings.HasPrefix(fullpath, req.Directory) {
return nil
}
message := &filer_pb.FullEventNotification{
Directory: fullpath,
EventNotification: eventNotification,
}
if err := stream.Send(message); err != nil {
return err
}
return nil
})
if readErr != nil {
glog.V(0).Infof("=> client %v: %+v", clientName, readErr)
return readErr
}
*/
// need to add a buffer here to avoid slow clients
// also needs to support millions of clients
for message := range messageChan {
if err := stream.Send(message); err != nil {
glog.V(0).Infof("=> client %v: %+v", clientName, message)
return err
}
fs.listenersLock.Lock()
fs.listenersCond.Wait()
fs.listenersLock.Unlock()
}
return nil
}
func (fs *FilerServer) addClient(clientType string, clientAddress string) (clientName string, messageChan chan *filer_pb.FullEventNotification) {
func (fs *FilerServer) addClient(clientType string, clientAddress string) (clientName string) {
clientName = clientType + "@" + clientAddress
glog.V(0).Infof("+ listener %v", clientName)
messageChan = make(chan *filer_pb.FullEventNotification, 10)
fs.clientChansLock.Lock()
fs.clientChans[clientName] = messageChan
fs.clientChansLock.Unlock()
return
}
func (fs *FilerServer) deleteClient(clientName string, messageChan chan *filer_pb.FullEventNotification) {
func (fs *FilerServer) deleteClient(clientName string) {
glog.V(0).Infof("- listener %v", clientName)
close(messageChan)
fs.clientChansLock.Lock()
delete(fs.clientChans, clientName)
fs.clientChansLock.Unlock()
}
func (fs *FilerServer) sendMessageToClients(dir string, eventNotification *filer_pb.EventNotification) {
message := &filer_pb.FullEventNotification{
Directory: dir,
EventNotification: eventNotification,
}
fs.clientChansLock.RLock()
for _, ch := range fs.clientChans {
ch <- message
}
fs.clientChansLock.RUnlock()
func (fs *FilerServer) notifyMetaListeners() {
fs.listenersCond.Broadcast()
}

8
weed/server/filer_server.go
View file

@ -12,7 +12,6 @@ import (
"github.com/chrislusf/seaweedfs/weed/operation"
"github.com/chrislusf/seaweedfs/weed/pb"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
"github.com/chrislusf/seaweedfs/weed/stats"
"github.com/chrislusf/seaweedfs/weed/util"
@ -57,8 +56,8 @@ type FilerServer struct {
grpcDialOption grpc.DialOption
// notifying clients
clientChansLock sync.RWMutex
clientChans map[string]chan *filer_pb.FullEventNotification
listenersLock sync.Mutex
listenersCond *sync.Cond
}
func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption) (fs *FilerServer, err error) {
@ -67,12 +66,13 @@ func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption)
option: option,
grpcDialOption: security.LoadClientTLS(util.GetViper(), "grpc.filer"),
}
fs.listenersCond = sync.NewCond(&fs.listenersLock)
if len(option.Masters) == 0 {
glog.Fatal("master list is required!")
}
fs.filer = filer2.NewFiler(option.Masters, fs.grpcDialOption, option.Port+10000)
fs.filer = filer2.NewFiler(option.Masters, fs.grpcDialOption, option.Port+10000, fs.notifyMetaListeners)
fs.filer.Cipher = option.Cipher
maybeStartMetrics(fs, option)