seaweedFS/weed/server/filer_server.go

package weed_server

import (
	"context"
	"fmt"
	"net/http"
	"os"
	"strings"
	"sync"
	"sync/atomic"
	"time"

	"github.com/seaweedfs/seaweedfs/weed/credential"
	"github.com/seaweedfs/seaweedfs/weed/stats"
	"golang.org/x/sync/singleflight"

	"google.golang.org/grpc"

	"github.com/seaweedfs/seaweedfs/weed/util/grace"

	"github.com/seaweedfs/seaweedfs/weed/operation"
	"github.com/seaweedfs/seaweedfs/weed/pb"
	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
	"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
	"github.com/seaweedfs/seaweedfs/weed/util"

	"github.com/seaweedfs/seaweedfs/weed/filer"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/arangodb"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/cassandra"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/cassandra2"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/elastic/v7"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/etcd"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/foundationdb"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/hbase"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/leveldb"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/leveldb2"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/leveldb3"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/mongodb"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/mysql"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/mysql2"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/postgres"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/postgres2"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/redis"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/redis2"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/redis3"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/sqlite"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/tarantool"
	_ "github.com/seaweedfs/seaweedfs/weed/filer/ydb"
	"github.com/seaweedfs/seaweedfs/weed/glog"
	"github.com/seaweedfs/seaweedfs/weed/notification"
	_ "github.com/seaweedfs/seaweedfs/weed/notification/aws_sqs"
	_ "github.com/seaweedfs/seaweedfs/weed/notification/gocdk_pub_sub"
	_ "github.com/seaweedfs/seaweedfs/weed/notification/google_pub_sub"
	_ "github.com/seaweedfs/seaweedfs/weed/notification/kafka"
	_ "github.com/seaweedfs/seaweedfs/weed/notification/log"
	_ "github.com/seaweedfs/seaweedfs/weed/notification/webhook"
	"github.com/seaweedfs/seaweedfs/weed/security"
)

type FilerOption struct {
	Masters                   *pb.ServerDiscovery
	FilerGroup                string
	Collection                string
	DefaultReplication        string
	DisableDirListing         bool
	MaxMB                     int
	DirListingLimit           int
	DataCenter                string
	Rack                      string
	DataNode                  string
	DefaultLevelDbDir         string
	DisableHttp               bool
	Host                      pb.ServerAddress
	recursiveDelete           bool
	Cipher                    bool
	SaveToFilerLimit          int64
	ConcurrentUploadLimit     int64
	ConcurrentFileUploadLimit int64
	ShowUIDirectoryDelete     bool
	DownloadMaxBytesPs        int64
	DiskType                  string
	AllowedOrigins            []string
	ExposeDirectoryData       bool
	TusBasePath               string
	CredentialManager         *credential.CredentialManager
}

type FilerServer struct {
	inFlightDataSize int64
	inFlightUploads  int64
	listenersWaits   int64

	// notifying clients
	listenersLock sync.Mutex
	listenersCond *sync.Cond

	inFlightDataLimitCond *sync.Cond

	filer_pb.UnimplementedSeaweedFilerServer
	option         *FilerOption
	secret         security.SigningKey
	filer          *filer.Filer
	filerGuard     *security.Guard
	volumeGuard    *security.Guard
	grpcDialOption grpc.DialOption

	// metrics read from the master
	metricsAddress     string
	metricsIntervalSec int

	// track known metadata listeners
	knownListenersLock sync.Mutex
	knownListeners     map[int32]int32

	// deduplicates concurrent remote object caching operations
	remoteCacheGroup singleflight.Group

	// credential manager for IAM operations
	CredentialManager *credential.CredentialManager
}

func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption) (fs *FilerServer, err error) {

	v := util.GetViper()
	signingKey := v.GetString("jwt.filer_signing.key")
	v.SetDefault("jwt.filer_signing.expires_after_seconds", 10)
	expiresAfterSec := v.GetInt("jwt.filer_signing.expires_after_seconds")

	readSigningKey := v.GetString("jwt.filer_signing.read.key")
	v.SetDefault("jwt.filer_signing.read.expires_after_seconds", 60)
	readExpiresAfterSec := v.GetInt("jwt.filer_signing.read.expires_after_seconds")

	volumeSigningKey := v.GetString("jwt.signing.key")
	v.SetDefault("jwt.signing.expires_after_seconds", 10)
	volumeExpiresAfterSec := v.GetInt("jwt.signing.expires_after_seconds")

	volumeReadSigningKey := v.GetString("jwt.signing.read.key")
	v.SetDefault("jwt.signing.read.expires_after_seconds", 60)
	volumeReadExpiresAfterSec := v.GetInt("jwt.signing.read.expires_after_seconds")

	v.SetDefault("cors.allowed_origins.values", "*")

	allowedOrigins := v.GetString("cors.allowed_origins.values")
	domains := strings.Split(allowedOrigins, ",")
	option.AllowedOrigins = domains

	v.SetDefault("filer.expose_directory_metadata.enabled", true)
	returnDirMetadata := v.GetBool("filer.expose_directory_metadata.enabled")
	option.ExposeDirectoryData = returnDirMetadata

	fs = &FilerServer{
		option:                option,
		grpcDialOption:        security.LoadClientTLS(util.GetViper(), "grpc.filer"),
		knownListeners:        make(map[int32]int32),
		inFlightDataLimitCond: sync.NewCond(new(sync.Mutex)),
		CredentialManager:     option.CredentialManager,
	}
	fs.listenersCond = sync.NewCond(&fs.listenersLock)

	option.Masters.RefreshBySrvIfAvailable()
	if len(option.Masters.GetInstances()) == 0 {
		glog.Fatal("master list is required!")
	}

	if !util.LoadConfiguration("filer", false) {
		v.SetDefault("leveldb2.enabled", true)
		v.SetDefault("leveldb2.dir", option.DefaultLevelDbDir)
		_, err := os.Stat(option.DefaultLevelDbDir)
		if os.IsNotExist(err) {
			os.MkdirAll(option.DefaultLevelDbDir, 0755)
		}
		glog.V(0).Infof("default to create filer store dir in %s", option.DefaultLevelDbDir)
	} else {
		glog.Warningf("skipping default store dir in %s", option.DefaultLevelDbDir)
	}
	util.LoadConfiguration("notification", false)

	v.SetDefault("filer.options.max_file_name_length", 255)
	maxFilenameLength := v.GetUint32("filer.options.max_file_name_length")
	glog.V(0).Infof("max_file_name_length %d", maxFilenameLength)
	fs.filer = filer.NewFiler(*option.Masters, fs.grpcDialOption, option.Host, option.FilerGroup, option.Collection, option.DefaultReplication, option.DataCenter, maxFilenameLength, func() {
		if atomic.LoadInt64(&fs.listenersWaits) > 0 {
			fs.listenersCond.Broadcast()
		}
	})
	fs.filer.Cipher = option.Cipher
	// we do not support IP whitelist right now https://github.com/seaweedfs/seaweedfs/issues/7094
	if v.GetString("guard.white_list") != "" {
		glog.Warningf("filer: guard.white_list is configured but the IP whitelist feature is currently disabled. See https://github.com/seaweedfs/seaweedfs/issues/7094")
	}
	fs.filerGuard = security.NewGuard([]string{}, signingKey, expiresAfterSec, readSigningKey, readExpiresAfterSec)
	fs.volumeGuard = security.NewGuard([]string{}, volumeSigningKey, volumeExpiresAfterSec, volumeReadSigningKey, volumeReadExpiresAfterSec)

	fs.checkWithMaster()

	go stats.LoopPushingMetric("filer", string(fs.option.Host), fs.metricsAddress, fs.metricsIntervalSec)
	go fs.filer.MasterClient.KeepConnectedToMaster(context.Background())

	fs.option.recursiveDelete = v.GetBool("filer.options.recursive_delete")
	v.SetDefault("filer.options.buckets_folder", "/buckets")
	fs.filer.DirBucketsPath = v.GetString("filer.options.buckets_folder")
	// TODO deprecated, will be removed after 2020-12-31
	// replaced by https://github.com/seaweedfs/seaweedfs/wiki/Path-Specific-Configuration
	// fs.filer.FsyncBuckets = v.GetStringSlice("filer.options.buckets_fsync")
	isFresh := fs.filer.LoadConfiguration(v)

	notification.LoadConfiguration(v, "notification.")

	handleStaticResources(defaultMux)
	if !option.DisableHttp {
		defaultMux.HandleFunc("/healthz", requestIDMiddleware(fs.filerHealthzHandler))
		// TUS resumable upload protocol handler
		if option.TusBasePath != "" {
			// Normalize TusPath to always have a leading slash and no trailing slash
			if !strings.HasPrefix(option.TusBasePath, "/") {
				option.TusBasePath = "/" + option.TusBasePath
			}
			option.TusBasePath = strings.TrimRight(option.TusBasePath, "/")

			// Disallow using "/" as TUS base to avoid hijacking all filer routes
			if option.TusBasePath == "" {
				glog.Warningf("Invalid TUS base path; TUS disabled (must not be root '/')")
			} else {
				handlePath := option.TusBasePath + "/"
				defaultMux.HandleFunc(handlePath, fs.filerGuard.WhiteList(requestIDMiddleware(fs.tusHandler)))
				// Start background cleanup of expired TUS sessions (every hour)
				fs.StartTusSessionCleanup(1 * time.Hour)
			}
		}
		defaultMux.HandleFunc("/", fs.filerGuard.WhiteList(requestIDMiddleware(fs.filerHandler)))
	}
	if defaultMux != readonlyMux {
		handleStaticResources(readonlyMux)
		readonlyMux.HandleFunc("/healthz", requestIDMiddleware(fs.filerHealthzHandler))
		readonlyMux.HandleFunc("/", fs.filerGuard.WhiteList(requestIDMiddleware(fs.readonlyFilerHandler)))
	}

	existingNodes := fs.filer.ListExistingPeerUpdates(context.Background())
	startFromTime := time.Now().Add(-filer.LogFlushInterval)
	if isFresh {
		glog.V(0).Infof("%s bootstrap from peers %+v", option.Host, existingNodes)
		if err := fs.filer.MaybeBootstrapFromOnePeer(option.Host, existingNodes, startFromTime); err != nil {
			glog.Fatalf("%s bootstrap from %+v: %v", option.Host, existingNodes, err)
		}
	}
	fs.filer.AggregateFromPeers(option.Host, existingNodes, startFromTime)

	fs.filer.LoadFilerConf()

	fs.filer.LoadRemoteStorageConfAndMapping()

	grace.OnReload(fs.Reload)
	grace.OnInterrupt(func() {
		fs.filer.Shutdown()
	})

	fs.filer.Dlm.LockRing.SetTakeSnapshotCallback(fs.OnDlmChangeSnapshot)

	if fs.CredentialManager != nil {
		fs.CredentialManager.SetMasterClient(fs.filer.MasterClient, fs.grpcDialOption)
	}

	return fs, nil
}

func (fs *FilerServer) checkWithMaster() {

	isConnected := false
	for !isConnected {
		fs.option.Masters.RefreshBySrvIfAvailable()
		for _, master := range fs.option.Masters.GetInstances() {
			readErr := operation.WithMasterServerClient(false, master, fs.grpcDialOption, func(masterClient master_pb.SeaweedClient) error {
				resp, err := masterClient.GetMasterConfiguration(context.Background(), &master_pb.GetMasterConfigurationRequest{})
				if err != nil {
					return fmt.Errorf("get master %s configuration: %v", master, err)
				}
				fs.metricsAddress, fs.metricsIntervalSec = resp.MetricsAddress, int(resp.MetricsIntervalSeconds)
				return nil
			})
			if readErr == nil {
				isConnected = true
			} else {
				time.Sleep(7 * time.Second)
			}
		}
	}
}

func (fs *FilerServer) Reload() {
	glog.V(0).Infoln("Reload filer server...")

	util.LoadConfiguration("security", false)
}