/
api_server.go
688 lines (642 loc) · 19.1 KB
/
api_server.go
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package server
import (
"fmt"
"io"
"math/rand"
"path/filepath"
"strings"
"sync"
"time"
pfsclient "github.com/pachyderm/pachyderm/src/client/pfs"
"github.com/pachyderm/pachyderm/src/client/pkg/shard"
"github.com/pachyderm/pachyderm/src/client/pkg/uuid"
pfsserver "github.com/pachyderm/pachyderm/src/server/pfs"
"github.com/pachyderm/pachyderm/src/server/pkg/metrics"
"go.pedge.io/pb/go/google/protobuf"
"go.pedge.io/proto/rpclog"
"go.pedge.io/proto/stream"
"go.pedge.io/proto/time"
"golang.org/x/net/context"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
)
type apiServer struct {
protorpclog.Logger
hasher *pfsserver.Hasher
router shard.Router
version int64
// versionLock protects the version field.
// versionLock must be held BEFORE reading from version and UNTIL all
// requests using version have returned
versionLock sync.RWMutex
}
func newAPIServer(
hasher *pfsserver.Hasher,
router shard.Router,
) *apiServer {
return &apiServer{
protorpclog.NewLogger("pachyderm.pfsserver.API"),
hasher,
router,
shard.InvalidVersion,
sync.RWMutex{},
}
}
func (a *apiServer) CreateRepo(ctx context.Context, request *pfsclient.CreateRepoRequest) (response *google_protobuf.Empty, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
defer func() {
if retErr == nil {
metrics.AddRepos(1)
}
}()
if strings.Contains(request.Repo.Name, "/") {
return nil, fmt.Errorf("repo names cannot contain /")
}
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
request.Created = prototime.TimeToTimestamp(time.Now())
for _, clientConn := range clientConns {
if _, err := pfsclient.NewInternalAPIClient(clientConn).CreateRepo(ctx, request); err != nil {
return nil, err
}
}
return google_protobuf.EmptyInstance, nil
}
func (a *apiServer) InspectRepo(ctx context.Context, request *pfsclient.InspectRepoRequest) (response *pfsclient.RepoInfo, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
var lock sync.Mutex
var wg sync.WaitGroup
var repoInfos []*pfsclient.RepoInfo
errCh := make(chan error, 1)
for _, clientConn := range clientConns {
wg.Add(1)
go func(clientConn *grpc.ClientConn) {
defer wg.Done()
repoInfo, err := pfsclient.NewInternalAPIClient(clientConn).InspectRepo(ctx, request)
if err != nil {
select {
case errCh <- err:
// error reported
default:
// not the first error
}
return
}
lock.Lock()
defer lock.Unlock()
repoInfos = append(repoInfos, repoInfo)
}(clientConn)
}
wg.Wait()
select {
case err := <-errCh:
return nil, err
default:
}
repoInfos = pfsserver.ReduceRepoInfos(repoInfos)
if len(repoInfos) != 1 || repoInfos[0].Repo.Name != request.Repo.Name {
return nil, fmt.Errorf("incorrect repo returned (this is likely a bug)")
}
return repoInfos[0], nil
}
func (a *apiServer) ListRepo(ctx context.Context, request *pfsclient.ListRepoRequest) (response *pfsclient.RepoInfos, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
var wg sync.WaitGroup
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
var lock sync.Mutex
var repoInfos []*pfsclient.RepoInfo
errCh := make(chan error, 1)
for _, clientConn := range clientConns {
clientConn := clientConn
wg.Add(1)
go func() {
defer wg.Done()
response, err := pfsclient.NewInternalAPIClient(clientConn).ListRepo(ctx, request)
if err != nil {
select {
default:
case errCh <- err:
return
}
return
}
lock.Lock()
repoInfos = append(repoInfos, response.RepoInfo...)
lock.Unlock()
}()
}
wg.Wait()
select {
default:
case err := <-errCh:
return nil, err
}
return &pfsclient.RepoInfos{RepoInfo: pfsserver.ReduceRepoInfos(repoInfos)}, nil
}
func (a *apiServer) DeleteRepo(ctx context.Context, request *pfsclient.DeleteRepoRequest) (response *google_protobuf.Empty, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
for _, clientConn := range clientConns {
if _, err := pfsclient.NewInternalAPIClient(clientConn).DeleteRepo(ctx, request); err != nil {
return nil, err
}
}
return google_protobuf.EmptyInstance, nil
}
func (a *apiServer) StartCommit(ctx context.Context, request *pfsclient.StartCommitRequest) (response *pfsclient.Commit, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
defer func() {
if retErr == nil {
metrics.AddCommits(1)
}
}()
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
if request.ID != "" {
return nil, fmt.Errorf("request.ID should be empty")
}
request.ID = uuid.NewWithoutDashes()
request.Started = prototime.TimeToTimestamp(time.Now())
for _, clientConn := range clientConns {
if _, err := pfsclient.NewInternalAPIClient(clientConn).StartCommit(ctx, request); err != nil {
return nil, err
}
}
return pfsclient.NewCommit(request.Repo.Name, request.ID), nil
}
func (a *apiServer) FinishCommit(ctx context.Context, request *pfsclient.FinishCommitRequest) (response *google_protobuf.Empty, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
request.Finished = prototime.TimeToTimestamp(time.Now())
for _, clientConn := range clientConns {
if _, err := pfsclient.NewInternalAPIClient(clientConn).FinishCommit(ctx, request); err != nil {
return nil, err
}
}
return google_protobuf.EmptyInstance, nil
}
func (a *apiServer) InspectCommit(ctx context.Context, request *pfsclient.InspectCommitRequest) (response *pfsclient.CommitInfo, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
var lock sync.Mutex
var wg sync.WaitGroup
var commitInfos []*pfsclient.CommitInfo
errCh := make(chan error, 1)
for _, clientConn := range clientConns {
wg.Add(1)
go func(clientConn *grpc.ClientConn) {
defer wg.Done()
commitInfo, err := pfsclient.NewInternalAPIClient(clientConn).InspectCommit(ctx, request)
if err != nil {
select {
case errCh <- err:
// error reported
default:
// not the first error
}
return
}
lock.Lock()
defer lock.Unlock()
commitInfos = append(commitInfos, commitInfo)
}(clientConn)
}
wg.Wait()
select {
case err := <-errCh:
return nil, err
default:
}
commitInfos = pfsserver.ReduceCommitInfos(commitInfos)
if len(commitInfos) != 1 || commitInfos[0].Commit.ID != request.Commit.ID {
return nil, fmt.Errorf("incorrect commit returned (this is likely a bug)")
}
return commitInfos[0], nil
}
func (a *apiServer) ListCommit(ctx context.Context, request *pfsclient.ListCommitRequest) (response *pfsclient.CommitInfos, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
var wg sync.WaitGroup
var lock sync.Mutex
var commitInfos []*pfsclient.CommitInfo
errCh := make(chan error, 1)
for _, clientConn := range clientConns {
wg.Add(1)
go func(clientConn *grpc.ClientConn) {
defer wg.Done()
subCommitInfos, err := pfsclient.NewInternalAPIClient(clientConn).ListCommit(ctx, request)
if err != nil {
select {
case errCh <- err:
// error reported
default:
// not the first error
}
return
}
lock.Lock()
defer lock.Unlock()
commitInfos = append(commitInfos, subCommitInfos.CommitInfo...)
}(clientConn)
}
wg.Wait()
select {
case err := <-errCh:
return nil, err
default:
}
return &pfsclient.CommitInfos{CommitInfo: pfsserver.ReduceCommitInfos(commitInfos)}, nil
}
func (a *apiServer) ListBranch(ctx context.Context, request *pfsclient.ListBranchRequest) (response *pfsclient.CommitInfos, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
var wg sync.WaitGroup
var lock sync.Mutex
var commitInfos []*pfsclient.CommitInfo
errCh := make(chan error, 1)
for _, clientConn := range clientConns {
wg.Add(1)
go func(clientConn *grpc.ClientConn) {
defer wg.Done()
subCommitInfos, err := pfsclient.NewInternalAPIClient(clientConn).ListBranch(ctx, request)
if err != nil {
select {
case errCh <- err:
// error reported
default:
// not the first error
}
return
}
lock.Lock()
defer lock.Unlock()
commitInfos = append(commitInfos, subCommitInfos.CommitInfo...)
}(clientConn)
}
wg.Wait()
select {
case err := <-errCh:
return nil, err
default:
}
return &pfsclient.CommitInfos{CommitInfo: pfsserver.ReduceCommitInfos(commitInfos)}, nil
}
func (a *apiServer) DeleteCommit(ctx context.Context, request *pfsclient.DeleteCommitRequest) (response *google_protobuf.Empty, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
for _, clientConn := range clientConns {
if _, err := pfsclient.NewInternalAPIClient(clientConn).DeleteCommit(ctx, request); err != nil {
return nil, err
}
}
return google_protobuf.EmptyInstance, nil
}
func (a *apiServer) PutFile(putFileServer pfsclient.API_PutFileServer) (retErr error) {
var request *pfsclient.PutFileRequest
var err error
defer func(start time.Time) {
if request != nil {
request.Value = nil // we set the value to nil so as not to spam logs
}
a.Log(request, google_protobuf.EmptyInstance, retErr, time.Since(start))
}(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx := versionToContext(a.version, putFileServer.Context())
defer func() {
if err := putFileServer.SendAndClose(google_protobuf.EmptyInstance); err != nil && retErr == nil {
retErr = err
}
}()
request, err = putFileServer.Recv()
if err != nil && err != io.EOF {
return err
}
if err == io.EOF {
// tolerate people calling and immediately hanging up
return nil
}
if strings.HasPrefix(request.File.Path, "/") {
// This is a subtle error case, the paths foo and /foo will hash to
// different shards but will produce the same change once they get to
// those shards due to how path.Join. This can go wrong in a number of
// ways so we forbid leading slashes.
return fmt.Errorf("pachyderm: leading slash in path: %s", request.File.Path)
}
var wg sync.WaitGroup
errCh := make(chan error, 1)
requests := []*pfsclient.PutFileRequest{request}
// For a file like foo/bar/buzz, we want to send two requests to create two
// directories foo/ and foo/bar/
dirs := dirs(request.File.Path)
for _, dir := range dirs {
dirReq := &pfsclient.PutFileRequest{
File: &pfsclient.File{
Path: dir,
Commit: request.File.Commit,
},
FileType: pfsclient.FileType_FILE_TYPE_DIR,
}
requests = append(requests, dirReq)
}
sendReq := func(request *pfsclient.PutFileRequest) (retErr error) {
clientConn, err := a.getClientConnForFile(request.File, a.version)
if err != nil {
return err
}
putFileClient, err := pfsclient.NewInternalAPIClient(clientConn).PutFile(ctx)
if err != nil {
return err
}
if request.FileType == pfsclient.FileType_FILE_TYPE_DIR {
if len(request.Value) > 0 {
return fmt.Errorf("PutFileRequest shouldn't have type dir and a value")
}
if err := putFileClient.Send(request); err != nil {
return err
}
if _, err := putFileClient.CloseAndRecv(); err != nil {
return err
}
return nil
}
defer func() {
if _, err := putFileClient.CloseAndRecv(); err != nil && retErr == nil {
retErr = err
}
}()
if err := putFileClient.Send(request); err != nil {
return err
}
for {
request, err := putFileServer.Recv()
if err != nil {
if err == io.EOF {
break
}
return err
}
if err := putFileClient.Send(request); err != nil {
return err
}
}
return nil
}
for _, req := range requests {
wg.Add(1)
req := req
go func() {
defer wg.Done()
if err := sendReq(req); err != nil {
select {
case errCh <- err:
// error reported
default:
// not the first error
}
return
}
}()
}
wg.Wait()
select {
case err := <-errCh:
return err
default:
return nil
}
}
func dirs(path string) []string {
var ancestors []string
for {
path = filepath.Dir(path)
if path == "." {
break
}
ancestors = append(ancestors, path)
}
return ancestors
}
func (a *apiServer) GetFile(request *pfsclient.GetFileRequest, apiGetFileServer pfsclient.API_GetFileServer) (retErr error) {
defer func(start time.Time) { a.Log(request, google_protobuf.EmptyInstance, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx := versionToContext(a.version, apiGetFileServer.Context())
clientConn, err := a.getClientConnForFile(request.File, a.version)
if err != nil {
return err
}
fileGetClient, err := pfsclient.NewInternalAPIClient(clientConn).GetFile(ctx, request)
if err != nil {
return err
}
return protostream.RelayFromStreamingBytesClient(fileGetClient, apiGetFileServer)
}
func (a *apiServer) InspectFile(ctx context.Context, request *pfsclient.InspectFileRequest) (response *pfsclient.FileInfo, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
clientConn, err := a.getClientConnForFile(request.File, a.version)
if err != nil {
return nil, err
}
fileInfo, err := pfsclient.NewInternalAPIClient(clientConn).InspectFile(ctx, request)
if err != nil {
return nil, err
}
if fileInfo.FileType == pfsclient.FileType_FILE_TYPE_DIR {
// If it's a directory, chances are that its children are scattered around
// the cluster, so we can't get the complete list of children without
// doing a multicast. So instead of returning a partial list of children,
// we'd rather return no children at all. To get the complete list of
// children, the caller is expected to use ListFile
fileInfo.Children = nil
}
return fileInfo, nil
}
func (a *apiServer) ListFile(ctx context.Context, request *pfsclient.ListFileRequest) (response *pfsclient.FileInfos, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
var wg sync.WaitGroup
var lock sync.Mutex
var fileInfos []*pfsclient.FileInfo
seenDirectories := make(map[string]bool)
errCh := make(chan error, 1)
for _, clientConn := range clientConns {
wg.Add(1)
go func(clientConn *grpc.ClientConn) {
defer wg.Done()
subFileInfos, err := pfsclient.NewInternalAPIClient(clientConn).ListFile(ctx, request)
lock.Lock()
defer lock.Unlock()
if err != nil {
select {
case errCh <- err:
// error reported
default:
// not the first error
}
return
}
for _, fileInfo := range subFileInfos.FileInfo {
if fileInfo.FileType == pfsclient.FileType_FILE_TYPE_DIR {
if seenDirectories[fileInfo.File.Path] {
continue
}
seenDirectories[fileInfo.File.Path] = true
}
fileInfos = append(fileInfos, fileInfo)
}
}(clientConn)
}
wg.Wait()
select {
case err := <-errCh:
return nil, err
default:
}
return &pfsclient.FileInfos{
FileInfo: pfsserver.ReduceFileInfos(fileInfos),
}, nil
}
func (a *apiServer) DeleteFile(ctx context.Context, request *pfsclient.DeleteFileRequest) (response *google_protobuf.Empty, retErr error) {
defer func(start time.Time) { a.Log(request, response, retErr, time.Since(start)) }(time.Now())
a.versionLock.RLock()
defer a.versionLock.RUnlock()
ctx = versionToContext(a.version, ctx)
fileInfo, err := a.InspectFile(ctx, &pfsclient.InspectFileRequest{
File: request.File,
})
if err != nil {
return nil, err
}
if fileInfo.FileType == pfsclient.FileType_FILE_TYPE_REGULAR {
clientConn, err := a.getClientConnForFile(request.File, a.version)
if err != nil {
return nil, err
}
return pfsclient.NewInternalAPIClient(clientConn).DeleteFile(ctx, request)
}
// If we are deleting a directory, we multicast it to the entire cluster
clientConns, err := a.router.GetAllClientConns(a.version)
if err != nil {
return nil, err
}
var wg sync.WaitGroup
errCh := make(chan error, 1)
for _, clientConn := range clientConns {
wg.Add(1)
clientConn := clientConn
go func() {
defer wg.Done()
_, err := pfsclient.NewInternalAPIClient(clientConn).DeleteFile(ctx, request)
if err != nil {
select {
case errCh <- err:
// error reported
default:
// not the first error
}
return
}
}()
}
wg.Wait()
select {
case err := <-errCh:
return nil, err
default:
}
return google_protobuf.EmptyInstance, nil
}
func (a *apiServer) Version(version int64) error {
a.versionLock.Lock()
defer a.versionLock.Unlock()
a.version = version
return nil
}
func (a *apiServer) getClientConn(version int64) (*grpc.ClientConn, error) {
shards, err := a.router.GetShards(a.version)
if err != nil {
return nil, err
}
for shard := range shards {
return a.router.GetClientConn(shard, version)
}
return a.router.GetClientConn(uint64(rand.Int())%a.hasher.FileModulus, version)
}
func (a *apiServer) getClientConnForFile(file *pfsclient.File, version int64) (*grpc.ClientConn, error) {
return a.router.GetClientConn(a.hasher.HashFile(file), version)
}
func versionToContext(version int64, ctx context.Context) context.Context {
return metadata.NewContext(
ctx,
metadata.Pairs("version", fmt.Sprint(version)),
)
}