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obj_block_api_server.go
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/
obj_block_api_server.go
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package server
import (
"bufio"
"bytes"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"time"
protolion "go.pedge.io/lion"
protorpclog "go.pedge.io/proto/rpclog"
"golang.org/x/net/context"
"golang.org/x/sync/errgroup"
"github.com/cenkalti/backoff"
"github.com/gogo/protobuf/types"
"github.com/golang/groupcache"
"github.com/pachyderm/pachyderm/src/client"
pfsclient "github.com/pachyderm/pachyderm/src/client/pfs"
"github.com/pachyderm/pachyderm/src/server/pkg/obj"
)
type objBlockAPIServer struct {
protorpclog.Logger
dir string
localServer *localBlockAPIServer
objClient obj.Client
cache *groupcache.Group
}
func newObjBlockAPIServer(dir string, cacheBytes int64, objClient obj.Client) (*objBlockAPIServer, error) {
localServer, err := newLocalBlockAPIServer(dir)
if err != nil {
return nil, err
}
return &objBlockAPIServer{
Logger: protorpclog.NewLogger("pfs.BlockAPI.Obj"),
dir: dir,
localServer: localServer,
objClient: objClient,
cache: groupcache.NewGroup("block", 1024*1024*1024*10,
groupcache.GetterFunc(func(ctx groupcache.Context, key string, dest groupcache.Sink) (retErr error) {
var reader io.ReadCloser
var err error
backoff.RetryNotify(func() error {
reader, err = objClient.Reader(localServer.blockPath(client.NewBlock(key)), 0, 0)
if err != nil && objClient.IsRetryable(err) {
return err
}
return nil
}, obj.NewExponentialBackOffConfig(), func(err error, d time.Duration) {
protolion.Infof("Error creating reader; retrying in %s: %#v", d, obj.RetryError{
Err: err.Error(),
TimeTillNextRetry: d.String(),
})
})
if err != nil {
return err
}
defer func() {
if err := reader.Close(); err != nil && retErr == nil {
retErr = err
}
}()
block, err := ioutil.ReadAll(reader)
if err != nil {
return err
}
return dest.SetBytes(block)
})),
}, nil
}
func newMinioBlockAPIServer(dir string, cacheBytes int64) (*objBlockAPIServer, error) {
objClient, err := obj.NewMinioClientFromSecret("")
if err != nil {
return nil, err
}
return newObjBlockAPIServer(dir, cacheBytes, objClient)
}
func newAmazonBlockAPIServer(dir string, cacheBytes int64) (*objBlockAPIServer, error) {
objClient, err := obj.NewAmazonClientFromSecret("")
if err != nil {
return nil, err
}
return newObjBlockAPIServer(dir, cacheBytes, objClient)
}
func newGoogleBlockAPIServer(dir string, cacheBytes int64) (*objBlockAPIServer, error) {
objClient, err := obj.NewGoogleClientFromSecret(context.Background(), "")
if err != nil {
return nil, err
}
return newObjBlockAPIServer(dir, cacheBytes, objClient)
}
func newMicrosoftBlockAPIServer(dir string, cacheBytes int64) (*objBlockAPIServer, error) {
objClient, err := obj.NewMicrosoftClientFromSecret("")
if err != nil {
return nil, err
}
return newObjBlockAPIServer(dir, cacheBytes, objClient)
}
func (s *objBlockAPIServer) PutBlock(putBlockServer pfsclient.BlockAPI_PutBlockServer) (retErr error) {
func() { s.Log(nil, nil, nil, 0) }()
result := &pfsclient.BlockRefs{}
defer func(start time.Time) { s.Log(nil, result, retErr, time.Since(start)) }(time.Now())
defer drainBlockServer(putBlockServer)
putBlockRequest, err := putBlockServer.Recv()
if err != nil {
if err != io.EOF {
return err
}
return putBlockServer.SendAndClose(result)
}
reader := bufio.NewReader(&putBlockReader{
server: putBlockServer,
buffer: bytes.NewBuffer(putBlockRequest.Value),
})
var eg errgroup.Group
decoder := json.NewDecoder(reader)
for {
blockRef, data, err := readBlock(putBlockRequest.Delimiter, reader, decoder)
if err != nil {
return err
}
result.BlockRef = append(result.BlockRef, blockRef)
eg.Go(func() (retErr error) {
backoff.RetryNotify(func() error {
path := s.localServer.blockPath(blockRef.Block)
// We don't want to overwrite blocks that already exist, since:
// 1) blocks are content-addressable, so it will be the same block
// 2) we risk exceeding the object store's rate limit
if s.objClient.Exists(path) {
return nil
}
writer, err := s.objClient.Writer(path)
if err != nil {
retErr = err
return nil
}
if _, err := writer.Write(data); err != nil {
retErr = err
return nil
}
if err := writer.Close(); err != nil {
if s.objClient.IsRetryable(err) {
return err
}
retErr = err
return nil
}
return nil
}, obj.NewExponentialBackOffConfig(), func(err error, d time.Duration) {
protolion.Infof("Error writing; retrying in %s: %#v", d, obj.RetryError{
Err: err.Error(),
TimeTillNextRetry: d.String(),
})
})
return
})
if (blockRef.Range.Upper - blockRef.Range.Lower) < uint64(blockSize) {
break
}
}
if err := eg.Wait(); err != nil {
return err
}
return putBlockServer.SendAndClose(result)
}
func (s *objBlockAPIServer) GetBlock(request *pfsclient.GetBlockRequest, getBlockServer pfsclient.BlockAPI_GetBlockServer) (retErr error) {
func() { s.Log(nil, nil, nil, 0) }()
defer func(start time.Time) { s.Log(request, nil, retErr, time.Since(start)) }(time.Now())
var data []byte
sink := groupcache.AllocatingByteSliceSink(&data)
if err := s.cache.Get(getBlockServer.Context(), request.Block.Hash, sink); err != nil {
return err
}
if request.SizeBytes != 0 && request.SizeBytes+request.OffsetBytes < uint64(len(data)) {
data = data[request.OffsetBytes : request.OffsetBytes+request.SizeBytes]
} else if request.OffsetBytes < uint64(len(data)) {
data = data[request.OffsetBytes:]
} else {
data = nil
}
return getBlockServer.Send(&types.BytesValue{Value: data})
}
func (s *objBlockAPIServer) DeleteBlock(ctx context.Context, request *pfsclient.DeleteBlockRequest) (response *types.Empty, retErr error) {
func() { s.Log(nil, nil, nil, 0) }()
defer func(start time.Time) { s.Log(request, response, retErr, time.Since(start)) }(time.Now())
backoff.RetryNotify(func() error {
if err := s.objClient.Delete(s.localServer.blockPath(request.Block)); err != nil && !s.objClient.IsNotExist(err) {
return err
}
return nil
}, obj.NewExponentialBackOffConfig(), func(err error, d time.Duration) {
protolion.Infof("Error deleting block; retrying in %s: %#v", d, obj.RetryError{
Err: err.Error(),
TimeTillNextRetry: d.String(),
})
})
return &types.Empty{}, nil
}
func (s *objBlockAPIServer) InspectBlock(ctx context.Context, request *pfsclient.InspectBlockRequest) (response *pfsclient.BlockInfo, retErr error) {
return nil, fmt.Errorf("not implemented")
}
func (s *objBlockAPIServer) ListBlock(ctx context.Context, request *pfsclient.ListBlockRequest) (response *pfsclient.BlockInfos, retErr error) {
return nil, fmt.Errorf("not implemented")
}