feat: warn users who are falling behind reprovides

Fixes: ipfs#9704
Fixes: ipfs#9702
Depends on: ipfs#273

cmd/ipfs/daemon.go

@@ -425,6 +425,9 @@ func daemonFunc(req *cmds.Request, re cmds.ResponseEmitter, env cmds.Environment
 	case routingOptionNoneKwd:
 		ncfg.Routing = libp2p.NilRouterOption
 	case routingOptionCustomKwd:
+		if cfg.Routing.AcceleratedDHTClient {
+			return fmt.Errorf("Routing.AcceleratedDHTClient option is set even tho Routing.Type is custom, using custom .AcceleratedDHTClient needs to be set on DHT routers individually")
+		}
 		ncfg.Routing = libp2p.ConstructDelegatedRouting(
 			cfg.Routing.Routers,
 			cfg.Routing.Methods,

config/experiments.go

@@ -8,7 +8,7 @@ type Experiments struct {
 	Libp2pStreamMounting          bool
 	P2pHttpProxy                  bool //nolint
 	StrategicProviding            bool
-	AcceleratedDHTClient          bool
+	AcceleratedDHTClient          experimentalAcceleratedDHTClient `json:",omitempty"`
 	OptimisticProvide             bool
 	OptimisticProvideJobsPoolSize int
 }

config/routing.go

@@ -15,6 +15,8 @@ type Routing struct {
 	// When "custom" is set, user-provided Routing.Routers is used.
 	Type *OptionalString `json:",omitempty"`
 
+	AcceleratedDHTClient bool
+
 	Routers Routers
 
 	Methods Methods

config/types.go

@@ -438,3 +438,27 @@ func (swarmLimits) UnmarshalJSON(b []byte) error {
 		}
 	}
 }
+
+type experimentalAcceleratedDHTClient struct{}
+
+var _ json.Unmarshaler = experimentalAcceleratedDHTClient{}
+
+func (experimentalAcceleratedDHTClient) UnmarshalJSON(b []byte) error {
+	d := json.NewDecoder(bytes.NewReader(b))
+	for {
+		switch tok, err := d.Token(); err {
+		case io.EOF:
+			return nil
+		case nil:
+			switch tok {
+			case json.Delim('{'), json.Delim('}'):
+				// accept empty objects
+				continue
+			}
+			//nolint
+			return fmt.Errorf("The Experimental.AcceleratedDHTClient key has been moved to Routing.AcceleratedDHTClient in Kubo 0.21, please use this new key and remove the old one.")
+		default:
+			return err
+		}
+	}
+}

core/commands/stat_provide.go

@@ -7,10 +7,10 @@ import (
 	"time"
 
 	humanize "github.com/dustin/go-humanize"
+	"github.com/ipfs/boxo/provider"
 	cmds "github.com/ipfs/go-ipfs-cmds"
 	"github.com/ipfs/kubo/core/commands/cmdenv"
-
-	"github.com/ipfs/boxo/provider/batched"
+	"golang.org/x/exp/constraints"
 )
 
 var statProvideCmd = &cmds.Command{
@@ -34,12 +34,7 @@ This interface is not stable and may change from release to release.
 			return ErrNotOnline
 		}
 
-		sys, ok := nd.Provider.(*batched.BatchProvidingSystem)
-		if !ok {
-			return fmt.Errorf("can only return stats if Experimental.AcceleratedDHTClient is enabled")
-		}
-
-		stats, err := sys.Stat(req.Context)
+		stats, err := nd.Provider.Stat()
 		if err != nil {
 			return err
 		}
@@ -51,7 +46,7 @@ This interface is not stable and may change from release to release.
 		return nil
 	},
 	Encoders: cmds.EncoderMap{
-		cmds.Text: cmds.MakeTypedEncoder(func(req *cmds.Request, w io.Writer, s *batched.BatchedProviderStats) error {
+		cmds.Text: cmds.MakeTypedEncoder(func(req *cmds.Request, w io.Writer, s *provider.ReproviderStats) error {
 			wtr := tabwriter.NewWriter(w, 1, 2, 1, ' ', 0)
 			defer wtr.Flush()
 
@@ -62,14 +57,14 @@ This interface is not stable and may change from release to release.
 			return nil
 		}),
 	},
-	Type: batched.BatchedProviderStats{},
+	Type: provider.ReproviderStats{},
 }
 
 func humanDuration(val time.Duration) string {
 	return val.Truncate(time.Microsecond).String()
 }
 
-func humanNumber(n int) string {
+func humanNumber[T constraints.Float | constraints.Integer](n T) string {
 	nf := float64(n)
 	str := humanSI(nf, 0)
 	fullStr := humanFull(nf, 0)

core/coreapi/coreapi.go

@@ -238,7 +238,7 @@ func (api *CoreAPI) WithOptions(opts ...options.ApiOption) (coreiface.CoreAPI, e
 			return nil, fmt.Errorf("error constructing namesys: %w", err)
 		}
 
-		subAPI.provider = provider.NewOfflineProvider()
+		subAPI.provider = provider.NewNoopProvider()
 
 		subAPI.peerstore = nil
 		subAPI.peerHost = nil

core/node/groups.go

@@ -304,7 +304,6 @@ func Online(bcfg *BuildCfg, cfg *config.Config, userResourceOverrides rcmgr.Part
 		LibP2P(bcfg, cfg, userResourceOverrides),
 		OnlineProviders(
 			cfg.Experimental.StrategicProviding,
-			cfg.Experimental.AcceleratedDHTClient,
 			cfg.Reprovider.Strategy.WithDefault(config.DefaultReproviderStrategy),
 			cfg.Reprovider.Interval.WithDefault(config.DefaultReproviderInterval),
 		),
@@ -320,12 +319,7 @@ func Offline(cfg *config.Config) fx.Option {
 		fx.Provide(libp2p.Routing),
 		fx.Provide(libp2p.ContentRouting),
 		fx.Provide(libp2p.OfflineRouting),
-		OfflineProviders(
-			cfg.Experimental.StrategicProviding,
-			cfg.Experimental.AcceleratedDHTClient,
-			cfg.Reprovider.Strategy.WithDefault(config.DefaultReproviderStrategy),
-			cfg.Reprovider.Interval.WithDefault(config.DefaultReproviderInterval),
-		),
+		OfflineProviders(),
 	)
 }
 

core/node/libp2p/routing.go

@@ -90,7 +90,7 @@ func BaseRouting(cfg *config.Config) interface{} {
 			}
 		}
 
-		if dualDHT != nil && cfg.Experimental.AcceleratedDHTClient {
+		if dualDHT != nil && cfg.Routing.AcceleratedDHTClient {
 			cfg, err := in.Repo.Config()
 			if err != nil {
 				return out, err

core/node/provider.go

@@ -5,145 +5,151 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/ipfs/boxo/blockstore"
 	"github.com/ipfs/boxo/fetcher"
 	pin "github.com/ipfs/boxo/pinning/pinner"
 	provider "github.com/ipfs/boxo/provider"
-	"github.com/ipfs/boxo/provider/batched"
-	q "github.com/ipfs/boxo/provider/queue"
-	"github.com/ipfs/boxo/provider/simple"
-	"go.uber.org/fx"
-
-	"github.com/ipfs/kubo/core/node/helpers"
 	"github.com/ipfs/kubo/repo"
 	irouting "github.com/ipfs/kubo/routing"
+	"go.uber.org/fx"
 )
 
-// SIMPLE
-
-// ProviderQueue creates new datastore backed provider queue
-func ProviderQueue(mctx helpers.MetricsCtx, lc fx.Lifecycle, repo repo.Repo) (*q.Queue, error) {
-	return q.NewQueue(helpers.LifecycleCtx(mctx, lc), "provider-v1", repo.Datastore())
-}
-
-// SimpleProvider creates new record provider
-func SimpleProvider(mctx helpers.MetricsCtx, lc fx.Lifecycle, queue *q.Queue, rt irouting.ProvideManyRouter) provider.Provider {
-	return simple.NewProvider(helpers.LifecycleCtx(mctx, lc), queue, rt)
-}
-
-// SimpleReprovider creates new reprovider
-func SimpleReprovider(reproviderInterval time.Duration) interface{} {
-	return func(mctx helpers.MetricsCtx, lc fx.Lifecycle, rt irouting.ProvideManyRouter, keyProvider simple.KeyChanFunc) (provider.Reprovider, error) {
-		return simple.NewReprovider(helpers.LifecycleCtx(mctx, lc), reproviderInterval, rt, keyProvider), nil
-	}
-}
-
-// SimpleProviderSys creates new provider system
-func SimpleProviderSys(isOnline bool) interface{} {
-	return func(lc fx.Lifecycle, p provider.Provider, r provider.Reprovider) provider.System {
-		sys := provider.NewSystem(p, r)
-
-		if isOnline {
-			lc.Append(fx.Hook{
-				OnStart: func(ctx context.Context) error {
-					sys.Run()
-					return nil
-				},
-				OnStop: func(ctx context.Context) error {
-					return sys.Close()
-				},
-			})
-		}
-
-		return sys
-	}
-}
-
-// BatchedProviderSys creates new provider system
-func BatchedProviderSys(isOnline bool, reprovideInterval time.Duration) interface{} {
-	return func(lc fx.Lifecycle, cr irouting.ProvideManyRouter, q *q.Queue, keyProvider simple.KeyChanFunc, repo repo.Repo) (provider.System, error) {
-		sys, err := batched.New(cr, q,
-			batched.ReproviderInterval(reprovideInterval),
-			batched.Datastore(repo.Datastore()),
-			batched.KeyProvider(keyProvider))
+func ProviderSys(reprovideInterval time.Duration) fx.Option {
+	const magicThroughputReportCount = 128
+	return fx.Provide(func(lc fx.Lifecycle, cr irouting.ProvideManyRouter, keyProvider provider.KeyChanFunc, repo repo.Repo, bs blockstore.Blockstore) (provider.System, error) {
+		sys, err := provider.New(repo.Datastore(),
+			provider.Online(cr),
+			provider.ReproviderInterval(reprovideInterval),
+			provider.KeyProvider(keyProvider),
+			provider.ThroughputReport(func(reprovide bool, complete bool, keysProvided uint, duration time.Duration) bool {
+				avgProvideSpeed := duration / time.Duration(keysProvided)
+				count := uint64(keysProvided)
+
+				if !reprovide || !complete {
+					// We don't know how many CIDs we have to provide, try to fetch it from the blockstore.
+					// But don't try for too long as this might be very expensive if you have a huge datastore.
+					ctx, cancel := context.WithTimeout(context.Background(), time.Minute*5)
+					defer cancel()
+
+					// FIXME: I want a running counter of blocks so size of blockstore can be an O(1) lookup.
+					ch, err := bs.AllKeysChan(ctx)
+					if err != nil {
+						logger.Errorf("fetching AllKeysChain in provider ThroughputReport: %v", err)
+						return false
+					}
+					count = 0
+				countLoop:
+					for {
+						select {
+						case _, ok := <-ch:
+							if !ok {
+								break countLoop
+							}
+							count++
+						case <-ctx.Done():
+							// really big blockstore mode
+
+							// how many blocks would be in a 10TiB blockstore with 128KiB blocks.
+							const probableBigBlockstore = (10 * 1024 * 1024 * 1024 * 1024) / (128 * 1024)
+							// How long per block that lasts us.
+							expectedProvideSpeed := reprovideInterval / probableBigBlockstore
+							if avgProvideSpeed > expectedProvideSpeed {
+								logger.Errorf(`
+🔔🔔🔔 YOU MAY BE FALLING BEHIND DHT REPROVIDES! 🔔🔔🔔
+
+⚠️ Your system might be struggling to keep up with DHT reprovides!
+Meaning your content being partially or completely inacessible on the network.
+We observed that you recently provided %d keys at an average rate of %v per key.
+
+🕑 An attempt to estimate your blockstore size timed out after 5 minutes,
+implying your blockstore might be exceedingly large. Assuming a considerable
+size of 10TiB, it would take %v to provide the complete set.
+
+⏰ The total provide time needs to stay under 24 hours to prevent falling behind!
+
+💡 Consider enabling the Accelerated DHT to enhance your system performance. See:
+https://github.com/ipfs/kubo/blob/master/docs/config.md#routingaccelerateddhtclient`,
+									keysProvided, avgProvideSpeed, avgProvideSpeed*probableBigBlockstore)
+								return false
+							}
+						}
+					}
+				}
+
+				// How long per block that lasts us.
+				expectedProvideSpeed := reprovideInterval / time.Duration(count)
+				if avgProvideSpeed > expectedProvideSpeed {
+					// FIXME(@Jorropo): add link to the accelerated DHT client docs once this isn't experimental anymore.
+					logger.Errorf(`
+🔔🔔🔔 YOU ARE FALLING BEHIND DHT REPROVIDES! 🔔🔔🔔
+
+⚠️ Your system is struggling to keep up with DHT reprovides!
+Meaning your content being partially or completely inacessible on the network.
+We observed that you recently provided %d keys at an average rate of %v per key.
+
+💾 Your total CID count is ~%d which would total at %v reprovide process.
+
+⏰ The total provide time needs to stay under 24 hours to prevent falling behind!
+
+💡 Consider enabling the Accelerated DHT to enhance your reprovide throughput. See:
+https://github.com/ipfs/kubo/blob/master/docs/config.md#routingaccelerateddhtclient`,
+						keysProvided, avgProvideSpeed, count, avgProvideSpeed*time.Duration(count))
+				}
+				return false
+			}, magicThroughputReportCount),
+		)
 		if err != nil {
 			return nil, err
 		}
 
-		if isOnline {
-			lc.Append(fx.Hook{
-				OnStart: func(ctx context.Context) error {
-					sys.Run()
-					return nil
-				},
-				OnStop: func(ctx context.Context) error {
-					return sys.Close()
-				},
-			})
-		}
+		lc.Append(fx.Hook{
+			OnStop: func(ctx context.Context) error {
+				return sys.Close()
+			},
+		})
 
 		return sys, nil
-	}
+	})
 }
 
 // ONLINE/OFFLINE
 
 // OnlineProviders groups units managing provider routing records online
-func OnlineProviders(useStrategicProviding bool, useBatchedProviding bool, reprovideStrategy string, reprovideInterval time.Duration) fx.Option {
-	if useStrategicProviding {
-		return fx.Provide(provider.NewOfflineProvider)
-	}
-
-	return fx.Options(
-		SimpleProviders(reprovideStrategy, reprovideInterval),
-		maybeProvide(SimpleProviderSys(true), !useBatchedProviding),
-		maybeProvide(BatchedProviderSys(true, reprovideInterval), useBatchedProviding),
-	)
-}
-
-// OfflineProviders groups units managing provider routing records offline
-func OfflineProviders(useStrategicProviding bool, useBatchedProviding bool, reprovideStrategy string, reprovideInterval time.Duration) fx.Option {
+func OnlineProviders(useStrategicProviding bool, reprovideStrategy string, reprovideInterval time.Duration) fx.Option {
 	if useStrategicProviding {
-		return fx.Provide(provider.NewOfflineProvider)
+		return OfflineProviders()
 	}
 
-	return fx.Options(
-		SimpleProviders(reprovideStrategy, reprovideInterval),
-		maybeProvide(SimpleProviderSys(false), true),
-		//maybeProvide(BatchedProviderSys(false, reprovideInterval), useBatchedProviding),
-	)
-}
-
-// SimpleProviders creates the simple provider/reprovider dependencies
-func SimpleProviders(reprovideStrategy string, reproviderInterval time.Duration) fx.Option {
 	var keyProvider fx.Option
 	switch reprovideStrategy {
-	case "all":
-		fallthrough
-	case "":
-		keyProvider = fx.Provide(simple.NewBlockstoreProvider)
+	case "all", "":
+		keyProvider = fx.Provide(provider.NewBlockstoreProvider)
 	case "roots":
 		keyProvider = fx.Provide(pinnedProviderStrategy(true))
 	case "pinned":
 		keyProvider = fx.Provide(pinnedProviderStrategy(false))
 	default:
-		return fx.Error(fmt.Errorf("unknown reprovider strategy '%s'", reprovideStrategy))
+		return fx.Error(fmt.Errorf("unknown reprovider strategy %q", reprovideStrategy))
 	}
 
 	return fx.Options(
-		fx.Provide(ProviderQueue),
-		fx.Provide(SimpleProvider),
 		keyProvider,
-		fx.Provide(SimpleReprovider(reproviderInterval)),
+		ProviderSys(reprovideInterval),
 	)
 }
 
+// OfflineProviders groups units managing provider routing records offline
+func OfflineProviders() fx.Option {
+	return fx.Provide(provider.NewNoopProvider)
+}
+
 func pinnedProviderStrategy(onlyRoots bool) interface{} {
 	type input struct {
 		fx.In
 		Pinner      pin.Pinner
 		IPLDFetcher fetcher.Factory `name:"ipldFetcher"`
 	}
-	return func(in input) simple.KeyChanFunc {
-		return simple.NewPinnedProvider(onlyRoots, in.Pinner, in.IPLDFetcher)
+	return func(in input) provider.KeyChanFunc {
+		return provider.NewPinnedProvider(onlyRoots, in.Pinner, in.IPLDFetcher)
 	}
 }