[#577] Update SDK to support new tree/pool version

Signed-off-by: Marina Biryukova <m.biryukova@yadro.com>

api/cache/buckets.go

@@ -6,14 +6,16 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	"github.com/bluele/gcache"
 	"go.uber.org/zap"
 )
 
 // BucketCache contains cache with objects and the lifetime of cache entries.
 type BucketCache struct {
-	cache  gcache.Cache
+	cache    gcache.Cache
-	logger *zap.Logger
+	cidCache gcache.Cache
+	logger   *zap.Logger
 }
 
 const (
@@ -33,14 +35,45 @@ func DefaultBucketConfig(logger *zap.Logger) *Config {
 }
 
 // NewBucketCache creates an object of BucketCache.
-func NewBucketCache(config *Config) *BucketCache {
+func NewBucketCache(config *Config, cidCache bool) *BucketCache {
-	gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
+	cache := &BucketCache{
-	return &BucketCache{cache: gc, logger: config.Logger}
+		cache:  gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build(),
+		logger: config.Logger,
+	}
+
+	if cidCache {
+		cache.cidCache = gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
+	}
+	return cache
 }
 
 // Get returns a cached object.
 func (o *BucketCache) Get(ns, bktName string) *data.BucketInfo {
-	entry, err := o.cache.Get(formKey(ns, bktName))
+	return o.get(formKey(ns, bktName))
+}
+
+func (o *BucketCache) GetByCID(cnrID cid.ID) *data.BucketInfo {
+	if o.cidCache == nil {
+		return nil
+	}
+
+	entry, err := o.cidCache.Get(cnrID)
+	if err != nil {
+		return nil
+	}
+
+	key, ok := entry.(string)
+	if !ok {
+		o.logger.Warn(logs.InvalidCacheEntryType, zap.String("actual", fmt.Sprintf("%T", entry)),
+			zap.String("expected", fmt.Sprintf("%T", key)))
+		return nil
+	}
+
+	return o.get(key)
+}
+
+func (o *BucketCache) get(key string) *data.BucketInfo {
+	entry, err := o.cache.Get(key)
 	if err != nil {
 		return nil
 	}
@@ -57,11 +90,21 @@ func (o *BucketCache) Get(ns, bktName string) *data.BucketInfo {
 
 // Put puts an object to cache.
 func (o *BucketCache) Put(bkt *data.BucketInfo) error {
+	if o.cidCache != nil {
+		if err := o.cidCache.Set(bkt.CID, formKey(bkt.Zone, bkt.Name)); err != nil {
+			return err
+		}
+	}
+
 	return o.cache.Set(formKey(bkt.Zone, bkt.Name), bkt)
 }
 
 // Delete deletes an object from cache.
 func (o *BucketCache) Delete(bkt *data.BucketInfo) bool {
+	if o.cidCache != nil {
+		o.cidCache.Remove(bkt.CID)
+	}
+
 	return o.cache.Remove(formKey(bkt.Zone, bkt.Name))
 }
 

api/cache/cache_test.go

@@ -42,7 +42,7 @@ func TestAccessBoxCacheType(t *testing.T) {
 
 func TestBucketsCacheType(t *testing.T) {
 	logger, observedLog := getObservedLogger()
-	cache := NewBucketCache(DefaultBucketConfig(logger))
+	cache := NewBucketCache(DefaultBucketConfig(logger), false)
 
 	bktInfo := &data.BucketInfo{Name: "bucket"}
 

api/cache/network.go

@@ -0,0 +1,86 @@
+package cache
+
+import (
+	"fmt"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
+	"github.com/bluele/gcache"
+	"go.uber.org/zap"
+)
+
+type (
+	// NetworkCache provides cache for network-related values.
+	NetworkCache struct {
+		cache  gcache.Cache
+		logger *zap.Logger
+	}
+
+	// NetworkCacheConfig stores expiration params for cache.
+	NetworkCacheConfig struct {
+		Lifetime time.Duration
+		Logger   *zap.Logger
+	}
+)
+
+const (
+	DefaultNetworkCacheLifetime = 1 * time.Minute
+	networkCacheSize            = 2
+	networkInfoKey              = "network_info"
+	netMapKey                   = "net_map"
+)
+
+// DefaultNetworkConfig returns new default cache expiration values.
+func DefaultNetworkConfig(logger *zap.Logger) *NetworkCacheConfig {
+	return &NetworkCacheConfig{
+		Lifetime: DefaultNetworkCacheLifetime,
+		Logger:   logger,
+	}
+}
+
+// NewNetworkCache creates an object of NetworkCache.
+func NewNetworkCache(config *NetworkCacheConfig) *NetworkCache {
+	gc := gcache.New(networkCacheSize).LRU().Expiration(config.Lifetime).Build()
+	return &NetworkCache{cache: gc, logger: config.Logger}
+}
+
+func (c *NetworkCache) GetNetworkInfo() *netmap.NetworkInfo {
+	entry, err := c.cache.Get(networkInfoKey)
+	if err != nil {
+		return nil
+	}
+
+	result, ok := entry.(netmap.NetworkInfo)
+	if !ok {
+		c.logger.Warn(logs.InvalidCacheEntryType, zap.String("actual", fmt.Sprintf("%T", entry)),
+			zap.String("expected", fmt.Sprintf("%T", result)))
+		return nil
+	}
+
+	return &result
+}
+
+func (c *NetworkCache) PutNetworkInfo(info netmap.NetworkInfo) error {
+	return c.cache.Set(networkInfoKey, info)
+}
+
+func (c *NetworkCache) GetNetMap() *netmap.NetMap {
+	entry, err := c.cache.Get(netMapKey)
+	if err != nil {
+		return nil
+	}
+
+	result, ok := entry.(netmap.NetMap)
+	if !ok {
+		c.logger.Warn(logs.InvalidCacheEntryType, zap.String("actual", fmt.Sprintf("%T", entry)),
+			zap.String("expected", fmt.Sprintf("%T", result)))
+		return nil
+	}
+
+	return &result
+}
+
+func (c *NetworkCache) PutNetMap(nm netmap.NetMap) error {
+	return c.cache.Set(netMapKey, nm)
+}

api/cache/network_info.go

@@ -1,65 +0,0 @@
-package cache
-
-import (
-	"fmt"
-	"time"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
-	"github.com/bluele/gcache"
-	"go.uber.org/zap"
-)
-
-type (
-	// NetworkInfoCache provides cache for network info.
-	NetworkInfoCache struct {
-		cache  gcache.Cache
-		logger *zap.Logger
-	}
-
-	// NetworkInfoCacheConfig stores expiration params for cache.
-	NetworkInfoCacheConfig struct {
-		Lifetime time.Duration
-		Logger   *zap.Logger
-	}
-)
-
-const (
-	DefaultNetworkInfoCacheLifetime = 1 * time.Minute
-	networkInfoCacheSize            = 1
-	networkInfoKey                  = "network_info"
-)
-
-// DefaultNetworkInfoConfig returns new default cache expiration values.
-func DefaultNetworkInfoConfig(logger *zap.Logger) *NetworkInfoCacheConfig {
-	return &NetworkInfoCacheConfig{
-		Lifetime: DefaultNetworkInfoCacheLifetime,
-		Logger:   logger,
-	}
-}
-
-// NewNetworkInfoCache creates an object of NetworkInfoCache.
-func NewNetworkInfoCache(config *NetworkInfoCacheConfig) *NetworkInfoCache {
-	gc := gcache.New(networkInfoCacheSize).LRU().Expiration(config.Lifetime).Build()
-	return &NetworkInfoCache{cache: gc, logger: config.Logger}
-}
-
-func (c *NetworkInfoCache) Get() *netmap.NetworkInfo {
-	entry, err := c.cache.Get(networkInfoKey)
-	if err != nil {
-		return nil
-	}
-
-	result, ok := entry.(netmap.NetworkInfo)
-	if !ok {
-		c.logger.Warn(logs.InvalidCacheEntryType, zap.String("actual", fmt.Sprintf("%T", entry)),
-			zap.String("expected", fmt.Sprintf("%T", result)))
-		return nil
-	}
-
-	return &result
-}
-
-func (c *NetworkInfoCache) Put(info netmap.NetworkInfo) error {
-	return c.cache.Set(networkInfoKey, info)
-}

api/data/info.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
@@ -32,6 +33,7 @@ type (
 		LocationConstraint      string
 		ObjectLockEnabled       bool
 		HomomorphicHashDisabled bool
+		PlacementPolicy         netmap.PlacementPolicy
 	}
 
 	// ObjectInfo holds S3 object data.

api/handler/handlers_test.go

@@ -256,7 +256,7 @@ func getMinCacheConfig(logger *zap.Logger) *layer.CachesConfig {
 		Buckets:       minCacheCfg,
 		System:        minCacheCfg,
 		AccessControl: minCacheCfg,
-		NetworkInfo:   &cache.NetworkInfoCacheConfig{Lifetime: minCacheCfg.Lifetime},
+		Network:       &cache.NetworkCacheConfig{Lifetime: minCacheCfg.Lifetime},
 	}
 }
 
@@ -404,6 +404,7 @@ func createTestBucketWithLock(hc *handlerContext, bktName string, conf *data.Obj
 		Creator:              hc.owner,
 		Name:                 bktName,
 		AdditionalAttributes: [][2]string{{layer.AttributeLockEnabled, "true"}},
+		Policy:               getPlacementPolicy(),
 	})
 	require.NoError(hc.t, err)
 
@@ -415,6 +416,7 @@ func createTestBucketWithLock(hc *handlerContext, bktName string, conf *data.Obj
 		ObjectLockEnabled:       true,
 		Owner:                   ownerID,
 		HomomorphicHashDisabled: res.HomomorphicHashDisabled,
+		PlacementPolicy:         getPlacementPolicy(),
 	}
 
 	key, err := keys.NewPrivateKey()
@@ -534,3 +536,10 @@ func readResponse(t *testing.T, w *httptest.ResponseRecorder, status int, model
 		require.NoError(t, err)
 	}
 }
+
+func getPlacementPolicy() (p netmap.PlacementPolicy) {
+	var r netmap.ReplicaDescriptor
+	r.SetNumberOfObjects(1)
+	p.AddReplicas([]netmap.ReplicaDescriptor{r}...)
+	return p
+}

api/layer/cache.go

@@ -20,7 +20,7 @@ type Cache struct {
 	bucketCache      *cache.BucketCache
 	systemCache      *cache.SystemCache
 	accessCache      *cache.AccessControlCache
-	networkInfoCache *cache.NetworkInfoCache
+	networkCache     *cache.NetworkCache
 }
 
 // CachesConfig contains params for caches.
@@ -33,7 +33,8 @@ type CachesConfig struct {
 	Buckets       *cache.Config
 	System        *cache.Config
 	AccessControl *cache.Config
-	NetworkInfo   *cache.NetworkInfoCacheConfig
+	Network       *cache.NetworkCacheConfig
+	CIDCache      bool
 }
 
 // DefaultCachesConfigs returns filled configs.
@@ -47,7 +48,7 @@ func DefaultCachesConfigs(logger *zap.Logger) *CachesConfig {
 		Buckets:       cache.DefaultBucketConfig(logger),
 		System:        cache.DefaultSystemConfig(logger),
 		AccessControl: cache.DefaultAccessControlConfig(logger),
-		NetworkInfo:   cache.DefaultNetworkInfoConfig(logger),
+		Network:       cache.DefaultNetworkConfig(logger),
 	}
 }
 
@@ -58,10 +59,10 @@ func NewCache(cfg *CachesConfig) *Cache {
 		sessionListCache: cache.NewListSessionCache(cfg.SessionList),
 		objCache:         cache.New(cfg.Objects),
 		namesCache:       cache.NewObjectsNameCache(cfg.Names),
-		bucketCache:      cache.NewBucketCache(cfg.Buckets),
+		bucketCache:      cache.NewBucketCache(cfg.Buckets, cfg.CIDCache),
 		systemCache:      cache.NewSystemCache(cfg.System),
 		accessCache:      cache.NewAccessControlCache(cfg.AccessControl),
-		networkInfoCache: cache.NewNetworkInfoCache(cfg.NetworkInfo),
+		networkCache:     cache.NewNetworkCache(cfg.Network),
 	}
 }
 
@@ -290,11 +291,30 @@ func (c *Cache) DeleteLifecycleConfiguration(bktInfo *data.BucketInfo) {
 }
 
 func (c *Cache) GetNetworkInfo() *netmap.NetworkInfo {
-	return c.networkInfoCache.Get()
+	return c.networkCache.GetNetworkInfo()
 }
 
 func (c *Cache) PutNetworkInfo(info netmap.NetworkInfo) {
-	if err := c.networkInfoCache.Put(info); err != nil {
+	if err := c.networkCache.PutNetworkInfo(info); err != nil {
 		c.logger.Warn(logs.CouldntCacheNetworkInfo, zap.Error(err))
 	}
 }
+
+func (c *Cache) GetNetMap() *netmap.NetMap {
+	return c.networkCache.GetNetMap()
+}
+
+func (c *Cache) PutNetMap(netMap netmap.NetMap) {
+	if err := c.networkCache.PutNetMap(netMap); err != nil {
+		c.logger.Warn(logs.CouldntCacheNetMap, zap.Error(err))
+	}
+}
+
+func (c *Cache) GetPlacementPolicy(cnrID cid.ID) *netmap.PlacementPolicy {
+	res := c.bucketCache.GetByCID(cnrID)
+	if res != nil {
+		return &res.PlacementPolicy
+	}
+
+	return nil
+}

api/layer/container.go

@@ -53,6 +53,7 @@ func (n *Layer) containerInfo(ctx context.Context, prm frostfs.PrmContainer) (*d
 	info.Created = container.CreatedAt(cnr)
 	info.LocationConstraint = cnr.Attribute(attributeLocationConstraint)
 	info.HomomorphicHashDisabled = container.IsHomomorphicHashingDisabled(cnr)
+	info.PlacementPolicy = cnr.PlacementPolicy()
 
 	attrLockEnabled := cnr.Attribute(AttributeLockEnabled)
 	if len(attrLockEnabled) > 0 {
@@ -148,6 +149,7 @@ func (n *Layer) createContainer(ctx context.Context, p *CreateBucketParams) (*da
 
 	bktInfo.CID = res.ContainerID
 	bktInfo.HomomorphicHashDisabled = res.HomomorphicHashDisabled
+	bktInfo.PlacementPolicy = p.Policy
 
 	n.cache.PutBucket(bktInfo)
 

api/layer/frostfs/frostfs.go

@@ -351,4 +351,7 @@ type FrostFS interface {
 
 	// Relations returns implementation of relations.Relations interface.
 	Relations() relations.Relations
+
+	// NetMapSnapshot returns information about FrostFS network map.
+	NetMapSnapshot(context.Context) (netmap.NetMap, error)
 }

api/layer/frostfs_mock.go

@@ -475,6 +475,10 @@ func (t *TestFrostFS) NetworkInfo(context.Context) (netmap.NetworkInfo, error) {
 	return ni, nil
 }
 
+func (t *TestFrostFS) NetMapSnapshot(context.Context) (netmap.NetMap, error) {
+	return netmap.NetMap{}, nil
+}
+
 func (t *TestFrostFS) PatchObject(ctx context.Context, prm frostfs.PrmObjectPatch) (oid.ID, error) {
 	obj, err := t.retrieveObject(ctx, prm.Container, prm.Object)
 	if err != nil {

api/layer/versioning_test.go

@@ -11,6 +11,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/creds/accessbox"
 	bearertest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer/test"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
@@ -156,7 +157,8 @@ func prepareContext(t *testing.T, cachesConfig ...*CachesConfig) *testContext {
 
 	bktName := "testbucket1"
 	res, err := tp.CreateContainer(ctx, frostfs.PrmContainerCreate{
-		Name: bktName,
+		Name:   bktName,
+		Policy: getPlacementPolicy(),
 	})
 	require.NoError(t, err)
 
@@ -445,3 +447,10 @@ func TestFilterVersionsByMarker(t *testing.T) {
 		})
 	}
 }
+
+func getPlacementPolicy() (p netmap.PlacementPolicy) {
+	var r netmap.ReplicaDescriptor
+	r.SetNumberOfObjects(1)
+	p.AddReplicas([]netmap.ReplicaDescriptor{r}...)
+	return p
+}

cmd/s3-gw/app.go

@@ -71,6 +71,7 @@ type (
 		key      *keys.PrivateKey
 		obj      *layer.Layer
 		api      api.Handler
+		cache    *layer.Cache
 
 		frostfsid *frostfsid.FrostFSID
 
@@ -164,15 +165,12 @@ func newApp(ctx context.Context, v *viper.Viper) *App {
 	logSettings := &loggerSettings{}
 	log := pickLogger(v, logSettings)
 	settings := newAppSettings(log, v)
-
+	appCache := layer.NewCache(getCacheOptions(v, log.logger))
-	objPool, treePool, key := getPools(ctx, log.logger, v, settings.dialerSource)
 
 	app := &App{
-		log:      log.logger,
+		log:   log.logger,
-		cfg:      v,
+		cfg:   v,
-		pool:     objPool,
+		cache: appCache,
-		treePool: treePool,
-		key:      key,
 
 		webDone: make(chan struct{}, 1),
 		wrkDone: make(chan struct{}, 1),
@@ -187,6 +185,7 @@ func newApp(ctx context.Context, v *viper.Viper) *App {
 }
 
 func (a *App) init(ctx context.Context) {
+	a.initPools(ctx)
 	a.initResolver()
 	a.initAuthCenter(ctx)
 	a.setRuntimeParameters()
@@ -244,7 +243,7 @@ func (a *App) initLayer(ctx context.Context) {
 	}
 
 	layerCfg := &layer.Config{
-		Cache: layer.NewCache(getCacheOptions(a.cfg, a.log)),
+		Cache: a.cache,
 		AnonKey: layer.AnonymousKey{
 			Key: randomKey,
 		},
@@ -757,77 +756,84 @@ func getDialerSource(logger *zap.Logger, cfg *viper.Viper) *internalnet.DialerSo
 	return source
 }
 
-func getPools(ctx context.Context, logger *zap.Logger, cfg *viper.Viper, dialSource *internalnet.DialerSource) (*pool.Pool, *treepool.Pool, *keys.PrivateKey) {
+func (a *App) initPools(ctx context.Context) {
 	var prm pool.InitParameters
 	var prmTree treepool.InitParameters
 
-	password := wallet.GetPassword(cfg, cfgWalletPassphrase)
+	password := wallet.GetPassword(a.cfg, cfgWalletPassphrase)
-	key, err := wallet.GetKeyFromPath(cfg.GetString(cfgWalletPath), cfg.GetString(cfgWalletAddress), password)
+	key, err := wallet.GetKeyFromPath(a.cfg.GetString(cfgWalletPath), a.cfg.GetString(cfgWalletAddress), password)
 	if err != nil {
-		logger.Fatal(logs.CouldNotLoadFrostFSPrivateKey, zap.Error(err))
+		a.log.Fatal(logs.CouldNotLoadFrostFSPrivateKey, zap.Error(err))
 	}
 
 	prm.SetKey(&key.PrivateKey)
 	prmTree.SetKey(key)
-	logger.Info(logs.UsingCredentials, zap.String("FrostFS", hex.EncodeToString(key.PublicKey().Bytes())))
+	a.log.Info(logs.UsingCredentials, zap.String("FrostFS", hex.EncodeToString(key.PublicKey().Bytes())))
 
-	for _, peer := range fetchPeers(logger, cfg) {
+	for _, peer := range fetchPeers(a.log, a.cfg) {
 		prm.AddNode(peer)
 		prmTree.AddNode(peer)
 	}
 
-	connTimeout := fetchConnectTimeout(cfg)
+	connTimeout := fetchConnectTimeout(a.cfg)
 	prm.SetNodeDialTimeout(connTimeout)
 	prmTree.SetNodeDialTimeout(connTimeout)
 
-	streamTimeout := fetchStreamTimeout(cfg)
+	streamTimeout := fetchStreamTimeout(a.cfg)
 	prm.SetNodeStreamTimeout(streamTimeout)
 	prmTree.SetNodeStreamTimeout(streamTimeout)
 
-	healthCheckTimeout := fetchHealthCheckTimeout(cfg)
+	healthCheckTimeout := fetchHealthCheckTimeout(a.cfg)
 	prm.SetHealthcheckTimeout(healthCheckTimeout)
 	prmTree.SetHealthcheckTimeout(healthCheckTimeout)
 
-	rebalanceInterval := fetchRebalanceInterval(cfg)
+	rebalanceInterval := fetchRebalanceInterval(a.cfg)
 	prm.SetClientRebalanceInterval(rebalanceInterval)
 	prmTree.SetClientRebalanceInterval(rebalanceInterval)
 
-	errorThreshold := fetchErrorThreshold(cfg)
+	errorThreshold := fetchErrorThreshold(a.cfg)
 	prm.SetErrorThreshold(errorThreshold)
 
-	prm.SetGracefulCloseOnSwitchTimeout(fetchSetGracefulCloseOnSwitchTimeout(cfg))
+	prm.SetGracefulCloseOnSwitchTimeout(fetchSetGracefulCloseOnSwitchTimeout(a.cfg))
 
-	prm.SetLogger(logger)
+	prm.SetLogger(a.log)
-	prmTree.SetLogger(logger)
+	prmTree.SetLogger(a.log)
 
-	prmTree.SetMaxRequestAttempts(cfg.GetInt(cfgTreePoolMaxAttempts))
+	prmTree.SetMaxRequestAttempts(a.cfg.GetInt(cfgTreePoolMaxAttempts))
 
 	interceptors := []grpc.DialOption{
 		grpc.WithUnaryInterceptor(grpctracing.NewUnaryClientInteceptor()),
 		grpc.WithStreamInterceptor(grpctracing.NewStreamClientInterceptor()),
-		grpc.WithContextDialer(dialSource.GrpcContextDialer()),
+		grpc.WithContextDialer(a.settings.dialerSource.GrpcContextDialer()),
 	}
 	prm.SetGRPCDialOptions(interceptors...)
 	prmTree.SetGRPCDialOptions(interceptors...)
 
 	p, err := pool.NewPool(prm)
 	if err != nil {
-		logger.Fatal(logs.FailedToCreateConnectionPool, zap.Error(err))
+		a.log.Fatal(logs.FailedToCreateConnectionPool, zap.Error(err))
 	}
 
 	if err = p.Dial(ctx); err != nil {
-		logger.Fatal(logs.FailedToDialConnectionPool, zap.Error(err))
+		a.log.Fatal(logs.FailedToDialConnectionPool, zap.Error(err))
+	}
+
+	if a.cfg.GetBool(cfgTreePoolNetmapSupport) {
+		source := frostfs.NewSource(frostfs.NewFrostFS(p, key), a.cache)
+		prmTree.SetNetMapInfoSource(source)
 	}
 
 	treePool, err := treepool.NewPool(prmTree)
 	if err != nil {
-		logger.Fatal(logs.FailedToCreateTreePool, zap.Error(err))
+		a.log.Fatal(logs.FailedToCreateTreePool, zap.Error(err))
 	}
 	if err = treePool.Dial(ctx); err != nil {
-		logger.Fatal(logs.FailedToDialTreePool, zap.Error(err))
+		a.log.Fatal(logs.FailedToDialTreePool, zap.Error(err))
 	}
 
-	return p, treePool, key
+	a.treePool = treePool
+	a.pool = p
+	a.key = key
 }
 
 func remove(list []string, element string) []string {
@@ -1091,7 +1097,9 @@ func getCacheOptions(v *viper.Viper, l *zap.Logger) *layer.CachesConfig {
 	cacheCfg.AccessControl.Lifetime = fetchCacheLifetime(v, l, cfgAccessControlCacheLifetime, cacheCfg.AccessControl.Lifetime)
 	cacheCfg.AccessControl.Size = fetchCacheSize(v, l, cfgAccessControlCacheSize, cacheCfg.AccessControl.Size)
 
-	cacheCfg.NetworkInfo.Lifetime = fetchCacheLifetime(v, l, cfgNetworkInfoCacheLifetime, cacheCfg.NetworkInfo.Lifetime)
+	cacheCfg.Network.Lifetime = fetchCacheLifetime(v, l, cfgNetworkCacheLifetime, cacheCfg.Network.Lifetime)
+
+	cacheCfg.CIDCache = v.GetBool(cfgTreePoolNetmapSupport)
 
 	return cacheCfg
 }

cmd/s3-gw/app_settings.go

@@ -147,7 +147,7 @@ const ( // Settings.
 	cfgMorphPolicyCacheSize       = "cache.morph_policy.size"
 	cfgFrostfsIDCacheLifetime     = "cache.frostfsid.lifetime"
 	cfgFrostfsIDCacheSize         = "cache.frostfsid.size"
-	cfgNetworkInfoCacheLifetime   = "cache.network_info.lifetime"
+	cfgNetworkCacheLifetime       = "cache.network.lifetime"
 
 	cfgAccessBoxCacheRemovingCheckInterval = "cache.accessbox.removing_check_interval"
 
@@ -268,8 +268,9 @@ const ( // Settings.
 	cfgSoftMemoryLimit = "runtime.soft_memory_limit"
 
 	// Enable return MD5 checksum in ETag.
-	cfgMD5Enabled          = "features.md5.enabled"
+	cfgMD5Enabled            = "features.md5.enabled"
-	cfgPolicyDenyByDefault = "features.policy.deny_by_default"
+	cfgPolicyDenyByDefault   = "features.policy.deny_by_default"
+	cfgTreePoolNetmapSupport = "features.tree_pool_netmap_support"
 
 	// FrostfsID.
 	cfgFrostfsIDContract          = "frostfsid.contract"

config/config.env

@@ -126,8 +126,8 @@ S3_GW_CACHE_MORPH_POLICY_SIZE=10000
 # Cache which stores frostfsid subject info
 S3_GW_CACHE_FROSTFSID_LIFETIME=1m
 S3_GW_CACHE_FROSTFSID_SIZE=10000
-# Cache which stores network info
+# Cache which stores network-related values
-S3_GW_CACHE_NETWORK_INFO_LIFETIME=1m
+S3_GW_CACHE_NETWORK_LIFETIME=1m
 
 # Default policy of placing containers in FrostFS
 # If a user sends a request `CreateBucket` and doesn't define policy for placing of a container in FrostFS, the S3 Gateway
@@ -205,6 +205,8 @@ S3_GW_RUNTIME_SOFT_MEMORY_LIMIT=1073741824
 S3_GW_FEATURES_MD5_ENABLED=false
 # Enable denying access for request that doesn't match any policy chain rules.
 S3_GW_FEATURES_POLICY_DENY_BY_DEFAULT=false
+# Enable using new version of tree pool, which uses net map to select nodes, for requests to tree service
+S3_GW_FEATURES_TREE_POOL_NETMAP_SUPPORT=true
 
 # ReadTimeout is the maximum duration for reading the entire
 # request, including the body. A zero or negative value means

config/config.yaml

@@ -158,8 +158,8 @@ cache:
   frostfsid:
     lifetime: 1m
     size: 10000
-  # Cache which stores network info
+  # Cache which stores network-related values
-  network_info:
+  network:
     lifetime: 1m
 
 # Parameters of FrostFS container placement policy
@@ -243,6 +243,8 @@ features:
     deny_by_default: false
   md5:
     enabled: false
+  # Enable using new version of tree pool, which uses net map to select nodes, for requests to tree service
+  tree_pool_netmap_support: true
 
 web:
   # ReadTimeout is the maximum duration for reading the entire

docs/configuration.md

@@ -449,7 +449,7 @@ cache:
   frostfsid:
     lifetime: 1m
     size: 10000
-  network_info:
+  network:
     lifetime: 1m
 ```
 
@@ -465,7 +465,7 @@ cache:
 | `accesscontrol` | [Cache config](#cache-subsection)               | `lifetime: 1m`<br>`size: 100000`  | Cache which stores owner to cache operation mapping.           |
 | `morph_policy`  | [Cache config](#cache-subsection)               | `lifetime: 1m`<br>`size: 10000`   | Cache which stores list of policy chains.                      |
 | `frostfsid`     | [Cache config](#cache-subsection)               | `lifetime: 1m`<br>`size: 10000`   | Cache which stores FrostfsID subject info.                     |
-| `network_info`  | [Cache config](#cache-subsection)               | `lifetime: 1m`                    | Cache which stores network info.                               |
+| `network`       | [Cache config](#cache-subsection)               | `lifetime: 1m`                    | Cache which stores network-related values.                     |
 
 #### `cache` subsection
 
@@ -688,12 +688,14 @@ features:
       deny_by_default: false
    md5:
       enabled: false
+   tree_pool_netmap_support: true
 ```
 
-| Parameter                | Type   | SIGHUP reload | Default value | Description                                                                  |
+| Parameter                  | Type   | SIGHUP reload | Default value | Description                                                                                              |
-|--------------------------|--------|---------------|---------------|------------------------------------------------------------------------------|
+|----------------------------|--------|---------------|---------------|----------------------------------------------------------------------------------------------------------|
-| `md5.enabled`            | `bool` | yes           | false         | Flag to enable return MD5 checksum in ETag headers and fields.               |
+| `md5.enabled`              | `bool` | yes           | false         | Flag to enable return MD5 checksum in ETag headers and fields.                                           |
-| `policy.deny_by_default` | `bool` | yes           | false         | Enable denying access for request that doesn't match any policy chain rules. |
+| `policy.deny_by_default`   | `bool` | yes           | false         | Enable denying access for request that doesn't match any policy chain rules.                             |
+| `tree_pool_netmap_support` | `bool` | no            | false         | Enable using new version of tree pool, which uses net map to select nodes, for requests to tree service. |
 
 # `web` section
 Contains web server configuration parameters.

go.mod

@@ -41,6 +41,8 @@ require (
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1
 )
 
+replace git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20241212101224-902f32eeabcf => git.frostfs.info/mbiryukova/frostfs-sdk-go v0.0.0-20241216085519-aa9d8ae72afd
+
 require (
 	git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0 // indirect
 	git.frostfs.info/TrueCloudLab/hrw v1.2.1 // indirect
@@ -74,10 +76,20 @@ require (
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/holiman/uint256 v1.2.4 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/ipfs/go-cid v0.0.7 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.6 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1 // indirect
+	github.com/minio/sha256-simd v1.0.1 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/multiformats/go-base32 v0.0.3 // indirect
+	github.com/multiformats/go-base36 v0.1.0 // indirect
+	github.com/multiformats/go-multiaddr v0.12.1 // indirect
+	github.com/multiformats/go-multibase v0.0.3 // indirect
+	github.com/multiformats/go-multihash v0.0.14 // indirect
+	github.com/multiformats/go-varint v0.0.6 // indirect
 	github.com/nspcc-dev/go-ordered-json v0.0.0-20240301084351-0246b013f8b2 // indirect
 	github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20240727093519-1a48f1ce43ec // indirect
 	github.com/nspcc-dev/rfc6979 v0.2.1 // indirect
@@ -87,6 +99,7 @@ require (
 	github.com/prometheus/common v0.48.0 // indirect
 	github.com/prometheus/procfs v0.12.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/spaolacci/murmur3 v1.1.0 // indirect
 	github.com/spf13/afero v1.9.3 // indirect
 	github.com/spf13/cast v1.5.0 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect

go.sum

@@ -42,8 +42,6 @@ git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0 h1:FxqFDhQYYgpe41qsIHVOcdzSV
 git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0/go.mod h1:RUIKZATQLJ+TaYQa60X2fTDwfuhMfm8Ar60bQ5fr+vU=
 git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20241112082307-f17779933e88 h1:9bvBDLApbbO5sXBKdODpE9tzy3HV99nXxkDWNn22rdI=
 git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20241112082307-f17779933e88/go.mod h1:kbwB4v2o6RyOfCo9kEFeUDZIX3LKhmS0yXPrtvzkQ1g=
-git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20241212101224-902f32eeabcf h1:PqRKQX+Xlqq4qsAlr7Jcx2kapLdPGZZQ09MEW+ui2c4=
-git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20241212101224-902f32eeabcf/go.mod h1:eoK7+KZQ9GJxbzIs6vTnoUJqFDppavInLRHaN4MYgZg=
 git.frostfs.info/TrueCloudLab/hrw v1.2.1 h1:ccBRK21rFvY5R1WotI6LNoPlizk7qSvdfD8lNIRudVc=
 git.frostfs.info/TrueCloudLab/hrw v1.2.1/go.mod h1:C1Ygde2n843yTZEQ0FP69jYiuaYV0kriLvP4zm8JuvM=
 git.frostfs.info/TrueCloudLab/multinet v0.0.0-20241015075604-6cb0d80e0972 h1:/960fWeyn2AFHwQUwDsWB3sbP6lTEnFnMzLMM6tx6N8=
@@ -56,6 +54,8 @@ git.frostfs.info/TrueCloudLab/tzhash v1.8.0 h1:UFMnUIk0Zh17m8rjGHJMqku2hCgaXDqjq
 git.frostfs.info/TrueCloudLab/tzhash v1.8.0/go.mod h1:dhY+oy274hV8wGvGL4MwwMpdL3GYvaX1a8GQZQHvlF8=
 git.frostfs.info/TrueCloudLab/zapjournald v0.0.0-20240124114243-cb2e66427d02 h1:HeY8n27VyPRQe49l/fzyVMkWEB2fsLJYKp64pwA7tz4=
 git.frostfs.info/TrueCloudLab/zapjournald v0.0.0-20240124114243-cb2e66427d02/go.mod h1:rQFJJdEOV7KbbMtQYR2lNfiZk+ONRDJSbMCTWxKt8Fw=
+git.frostfs.info/mbiryukova/frostfs-sdk-go v0.0.0-20241216085519-aa9d8ae72afd h1:+3VIGZuPw1JBCBMF3d0AebLMxs0OvbYU+4JtAmbfPj4=
+git.frostfs.info/mbiryukova/frostfs-sdk-go v0.0.0-20241216085519-aa9d8ae72afd/go.mod h1:MoHQvB4wNZZRGh112UEgMVvLF2goIReAXRUslK5iBII=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/VictoriaMetrics/easyproto v0.1.4 h1:r8cNvo8o6sR4QShBXQd1bKw/VVLSQma/V2KhTBPf+Sc=
@@ -216,11 +216,15 @@ github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/ipfs/go-cid v0.0.7 h1:ysQJVJA3fNDF1qigJbsSQOdjhVLsOEoPdh0+R97k3jY=
+github.com/ipfs/go-cid v0.0.7/go.mod h1:6Ux9z5e+HpkQdckYoX1PG/6xqKspzlEIR5SDmgqgC/I=
 github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
 github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
 github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/XSXhF0NWZEnDohbsk=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
+github.com/klauspost/cpuid/v2 v2.2.6 h1:ndNyv040zDGIDh8thGkXYjnFtiN02M1PVVF+JE/48xc=
+github.com/klauspost/cpuid/v2 v2.2.6/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
 github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
@@ -233,14 +237,35 @@ github.com/magiconair/properties v1.8.7 h1:IeQXZAiQcpL9mgcAe1Nu6cX9LLw6ExEHKjN0V
 github.com/magiconair/properties v1.8.7/go.mod h1:Dhd985XPs7jluiymwWYZ0G4Z61jb3vdS329zhj2hYo0=
 github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
 github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
+github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1 h1:lYpkrQH5ajf0OXOcUbGjvZxxijuBwbbmlSxLiuofa+g=
+github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1/go.mod h1:pD8RvIylQ358TN4wwqatJ8rNavkEINozVn9DtGI3dfQ=
+github.com/minio/sha256-simd v0.1.1-0.20190913151208-6de447530771/go.mod h1:B5e1o+1/KgNmWrSQK08Y6Z1Vb5pwIktudl0J58iy0KM=
+github.com/minio/sha256-simd v1.0.1 h1:6kaan5IFmwTNynnKKpDHe6FWHohJOHhCPchzK49dzMM=
+github.com/minio/sha256-simd v1.0.1/go.mod h1:Pz6AKMiUdngCLpeTL/RJY1M9rUuPMYujV5xJjtbRSN8=
 github.com/minio/sio v0.3.0 h1:syEFBewzOMOYVzSTFpp1MqpSZk8rUNbz8VIIc+PNzus=
 github.com/minio/sio v0.3.0/go.mod h1:8b0yPp2avGThviy/+OCJBI6OMpvxoUuiLvE6F1lebhw=
 github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
 github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/mmcloughlin/addchain v0.4.0 h1:SobOdjm2xLj1KkXN5/n0xTIWyZA2+s99UCY1iPfkHRY=
 github.com/mmcloughlin/addchain v0.4.0/go.mod h1:A86O+tHqZLMNO4w6ZZ4FlVQEadcoqkyU72HC5wJ4RlU=
+github.com/mr-tron/base58 v1.1.0/go.mod h1:xcD2VGqlgYjBdcBLw+TuYLr8afG+Hj8g2eTVqeSzSU8=
+github.com/mr-tron/base58 v1.1.3/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjWI2mNwc=
 github.com/mr-tron/base58 v1.2.0 h1:T/HDJBh4ZCPbU39/+c3rRvE0uKBQlU27+QI8LJ4t64o=
 github.com/mr-tron/base58 v1.2.0/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjWI2mNwc=
+github.com/multiformats/go-base32 v0.0.3 h1:tw5+NhuwaOjJCC5Pp82QuXbrmLzWg7uxlMFp8Nq/kkI=
+github.com/multiformats/go-base32 v0.0.3/go.mod h1:pLiuGC8y0QR3Ue4Zug5UzK9LjgbkL8NSQj0zQ5Nz/AA=
+github.com/multiformats/go-base36 v0.1.0 h1:JR6TyF7JjGd3m6FbLU2cOxhC0Li8z8dLNGQ89tUg4F4=
+github.com/multiformats/go-base36 v0.1.0/go.mod h1:kFGE83c6s80PklsHO9sRn2NCoffoRdUUOENyW/Vv6sM=
+github.com/multiformats/go-multiaddr v0.12.1 h1:vm+BA/WZA8QZDp1pF1FWhi5CT3g1tbi5GJmqpb6wnlk=
+github.com/multiformats/go-multiaddr v0.12.1/go.mod h1:7mPkiBMmLeFipt+nNSq9pHZUeJSt8lHBgH6yhj0YQzE=
+github.com/multiformats/go-multibase v0.0.3 h1:l/B6bJDQjvQ5G52jw4QGSYeOTZoAwIO77RblWplfIqk=
+github.com/multiformats/go-multibase v0.0.3/go.mod h1:5+1R4eQrT3PkYZ24C3W2Ue2tPwIdYQD509ZjSb5y9Oc=
+github.com/multiformats/go-multihash v0.0.13/go.mod h1:VdAWLKTwram9oKAatUcLxBNUjdtcVwxObEQBtRfuyjc=
+github.com/multiformats/go-multihash v0.0.14 h1:QoBceQYQQtNUuf6s7wHxnE2c8bhbMqhfGzNI032se/I=
+github.com/multiformats/go-multihash v0.0.14/go.mod h1:VdAWLKTwram9oKAatUcLxBNUjdtcVwxObEQBtRfuyjc=
+github.com/multiformats/go-varint v0.0.5/go.mod h1:3Ls8CIEsrijN6+B7PbrXRPxHRPuXSrVKRY101jdMZYE=
+github.com/multiformats/go-varint v0.0.6 h1:gk85QWKxh3TazbLxED/NlDVv8+q+ReFJk7Y2W/KhfNY=
+github.com/multiformats/go-varint v0.0.6/go.mod h1:3Ls8CIEsrijN6+B7PbrXRPxHRPuXSrVKRY101jdMZYE=
 github.com/nspcc-dev/dbft v0.2.0 h1:sDwsQES600OSIMncV176t2SX5OvB14lzeOAyKFOkbMI=
 github.com/nspcc-dev/dbft v0.2.0/go.mod h1:oFE6paSC/yfFh9mcNU6MheMGOYXK9+sPiRk3YMoz49o=
 github.com/nspcc-dev/go-ordered-json v0.0.0-20240301084351-0246b013f8b2 h1:mD9hU3v+zJcnHAVmHnZKt3I++tvn30gBj2rP2PocZMk=
@@ -284,6 +309,8 @@ github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU
 github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/spaolacci/murmur3 v1.1.0 h1:7c1g84S4BPRrfL5Xrdp6fOJ206sU9y293DDHaoy0bLI=
+github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/spf13/afero v1.9.3 h1:41FoI0fD7OR7mGcKE/aOiLkGreyf8ifIOQmJANWogMk=
 github.com/spf13/afero v1.9.3/go.mod h1:iUV7ddyEEZPO5gA3zD4fJt6iStLlL+Lg4m2cihcDf8Y=
 github.com/spf13/cast v1.5.0 h1:rj3WzYc11XZaIZMPKmwP96zkFEnnAmV8s6XbB2aY32w=
@@ -362,6 +389,7 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
@@ -504,6 +532,7 @@ golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
 golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=

internal/frostfs/frostfs.go

@@ -408,6 +408,15 @@ func (x *FrostFS) NetworkInfo(ctx context.Context) (netmap.NetworkInfo, error) {
 	return ni, nil
 }
 
+func (x *FrostFS) NetMapSnapshot(ctx context.Context) (netmap.NetMap, error) {
+	netMap, err := x.pool.NetMapSnapshot(ctx)
+	if err != nil {
+		return netMap, handleObjectError("get net map via connection pool", err)
+	}
+
+	return netMap, nil
+}
+
 func (x *FrostFS) PatchObject(ctx context.Context, prm frostfs.PrmObjectPatch) (oid.ID, error) {
 	var addr oid.Address
 	addr.SetContainer(prm.Container)

internal/frostfs/source.go

@@ -0,0 +1,66 @@
+package frostfs
+
+import (
+	"context"
+	"fmt"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer/frostfs"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
+)
+
+type Source struct {
+	frostFS *FrostFS
+	cache   *layer.Cache
+}
+
+func NewSource(frostFS *FrostFS, cache *layer.Cache) *Source {
+	return &Source{
+		frostFS: frostFS,
+		cache:   cache,
+	}
+}
+
+func (n *Source) NetMapSnapshot(ctx context.Context) (netmap.NetMap, error) {
+	cachedNetMap := n.cache.GetNetMap()
+	if cachedNetMap != nil {
+		return *cachedNetMap, nil
+	}
+
+	netMap, err := n.frostFS.NetMapSnapshot(ctx)
+	if err != nil {
+		return netmap.NetMap{}, fmt.Errorf("get net map: %w", err)
+	}
+
+	n.cache.PutNetMap(netMap)
+
+	return netMap, nil
+}
+
+func (n *Source) PlacementPolicy(ctx context.Context, cnrID cid.ID) (netmap.PlacementPolicy, error) {
+	cachedPolicy := n.cache.GetPlacementPolicy(cnrID)
+	if cachedPolicy != nil {
+		return *cachedPolicy, nil
+	}
+
+	prm := frostfs.PrmContainer{
+		ContainerID: cnrID,
+	}
+	if bd, err := middleware.GetBoxData(ctx); err == nil && bd.Gate != nil {
+		prm.SessionToken = bd.Gate.SessionToken()
+	}
+
+	res, err := n.frostFS.Container(ctx, prm)
+	if err != nil {
+		return netmap.PlacementPolicy{}, fmt.Errorf("get container: %w", err)
+	}
+
+	// We don't put container back to the cache to keep cache
+	// coherent to the requests made by S3 users. FrostFS Source
+	// is being used by SDK Tree Pool and it should not fill cache
+	// with possibly irrelevant container values.
+
+	return res.PlacementPolicy(), nil
+}

internal/logs/logs.go

@@ -183,4 +183,5 @@ const (
 	FailedToListAllObjectRelations                       = "failed to list all object relations"
 	WarnInvalidTypeTLSTerminationHeader                  = "invalid type of value of tls termination header"
 	FailedToPutTombstones                                = "failed to put tombstones"
+	CouldntCacheNetMap                                   = "couldn't cache net map"
 )