[#422] Support separate container for CORS

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

api/data/info.go

@@ -87,7 +87,9 @@ type (
 func (b *BucketInfo) SettingsObjectName() string { return bktSettingsObject }
 
 // CORSObjectName returns a system name for a bucket CORS configuration file.
-func (b *BucketInfo) CORSObjectName() string { return bktCORSConfigurationObject }
+func (b *BucketInfo) CORSObjectName() string {
+	return b.CID.EncodeToString() + bktCORSConfigurationObject
+}
 
 // VersionID returns object version from ObjectInfo.
 func (o *ObjectInfo) VersionID() string { return o.ID.EncodeToString() }

api/layer/cache.go

@@ -233,7 +233,7 @@ func (c *Cache) PutSettings(owner user.ID, bktInfo *data.BucketInfo, settings *d
 }
 
 func (c *Cache) GetCORS(owner user.ID, bkt *data.BucketInfo) *data.CORSConfiguration {
-	key := bkt.Name + bkt.CORSObjectName()
+	key := bkt.CORSObjectName()
 
 	if !c.accessCache.Get(owner, key) {
 		return nil
@@ -243,7 +243,7 @@ func (c *Cache) GetCORS(owner user.ID, bkt *data.BucketInfo) *data.CORSConfigura
 }
 
 func (c *Cache) PutCORS(owner user.ID, bkt *data.BucketInfo, cors *data.CORSConfiguration) {
-	key := bkt.Name + bkt.CORSObjectName()
+	key := bkt.CORSObjectName()
 
 	if err := c.systemCache.PutCORS(key, cors); err != nil {
 		c.logger.Warn(logs.CouldntCacheCors, zap.String("bucket", bkt.Name), zap.Error(err))
@@ -255,5 +255,5 @@ func (c *Cache) PutCORS(owner user.ID, bkt *data.BucketInfo, cors *data.CORSConf
 }
 
 func (c *Cache) DeleteCORS(bktInfo *data.BucketInfo) {
-	c.systemCache.Delete(bktInfo.Name + bktInfo.CORSObjectName())
+	c.systemCache.Delete(bktInfo.CORSObjectName())
 }

api/layer/cors.go

@@ -10,6 +10,8 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"go.uber.org/zap"
 )
 
@@ -37,30 +39,35 @@ func (n *Layer) PutBucketCORS(ctx context.Context, p *PutCORSParams) error {
 	}
 
 	prm := PrmObjectCreate{
-		Container:    p.BktInfo.CID,
 		Payload:      &buf,
 		Filepath:     p.BktInfo.CORSObjectName(),
 		CreationTime: TimeNow(ctx),
-		CopiesNumber: p.CopiesNumbers,
 	}
 
-	_, objID, _, _, err := n.objectPutAndHash(ctx, prm, p.BktInfo)
+	var corsBkt *data.BucketInfo
+	if n.corsCnrInfo == nil {
+		corsBkt = p.BktInfo
+		prm.CopiesNumber = p.CopiesNumbers
+	} else {
+		corsBkt = n.corsCnrInfo
+		prm.PrmAuth.PrivateKey = &n.gateKey.PrivateKey
+	}
+
+	prm.Container = corsBkt.CID
+
+	_, objID, _, _, err := n.objectPutAndHash(ctx, prm, corsBkt)
 	if err != nil {
-		return fmt.Errorf("put system object: %w", err)
+		return fmt.Errorf("put cors object: %w", err)
 	}
 
-	objIDToDelete, err := n.treeService.PutBucketCORS(ctx, p.BktInfo, objID)
+	objToDelete, err := n.treeService.PutBucketCORS(ctx, p.BktInfo, newAddress(corsBkt.CID, objID))
-	objIDToDeleteNotFound := errorsStd.Is(err, ErrNoNodeToRemove)
+	objToDeleteNotFound := errorsStd.Is(err, ErrNoNodeToRemove)
-	if err != nil && !objIDToDeleteNotFound {
+	if err != nil && !objToDeleteNotFound {
 		return err
 	}
 
-	if !objIDToDeleteNotFound {
+	if !objToDeleteNotFound {
-		if err = n.objectDelete(ctx, p.BktInfo, objIDToDelete); err != nil {
+		n.deleteCORSObject(ctx, p.BktInfo, objToDelete)
-			n.reqLogger(ctx).Error(logs.CouldntDeleteCorsObject, zap.Error(err),
-				zap.String("cnrID", p.BktInfo.CID.EncodeToString()),
-				zap.String("objID", objIDToDelete.EncodeToString()))
-		}
 	}
 
 	n.cache.PutCORS(n.BearerOwner(ctx), p.BktInfo, cors)
@@ -68,12 +75,25 @@ func (n *Layer) PutBucketCORS(ctx context.Context, p *PutCORSParams) error {
 	return nil
 }
 
+// deleteCORSObject removes object and logs in case of error.
+func (n *Layer) deleteCORSObject(ctx context.Context, bktInfo *data.BucketInfo, addr oid.Address) {
+	var prmAuth PrmAuth
+	corsBkt := bktInfo
+	if !addr.Container().Equals(bktInfo.CID) && !addr.Container().Equals(cid.ID{}) {
+		corsBkt = &data.BucketInfo{CID: addr.Container()}
+		prmAuth.PrivateKey = &n.gateKey.PrivateKey
+	}
+
+	if err := n.objectDeleteWithAuth(ctx, corsBkt, addr.Object(), prmAuth); err != nil {
+		n.reqLogger(ctx).Error(logs.CouldntDeleteCorsObject, zap.Error(err),
+			zap.String("cnrID", corsBkt.CID.EncodeToString()),
+			zap.String("objID", addr.Object().EncodeToString()))
+	}
+}
+
 func (n *Layer) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (*data.CORSConfiguration, error) {
 	cors, err := n.getCORS(ctx, bktInfo)
 	if err != nil {
-		if errorsStd.Is(err, ErrNodeNotFound) {
-			return nil, fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrNoSuchCORSConfiguration), err.Error())
-		}
 		return nil, err
 	}
 
@@ -81,14 +101,22 @@ func (n *Layer) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (*d
 }
 
 func (n *Layer) DeleteBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) error {
-	objID, err := n.treeService.DeleteBucketCORS(ctx, bktInfo)
+	obj, err := n.treeService.DeleteBucketCORS(ctx, bktInfo)
-	objIDNotFound := errorsStd.Is(err, ErrNoNodeToRemove)
+	objNotFound := errorsStd.Is(err, ErrNoNodeToRemove)
-	if err != nil && !objIDNotFound {
+	if err != nil && !objNotFound {
 		return err
 	}
-	if !objIDNotFound {
+
-		if err = n.objectDelete(ctx, bktInfo, objID); err != nil {
+	if !objNotFound {
-			return err
+		var prmAuth PrmAuth
+		corsBkt := bktInfo
+		if !obj.Container().Equals(bktInfo.CID) && !obj.Container().Equals(cid.ID{}) {
+			corsBkt = &data.BucketInfo{CID: obj.Container()}
+			prmAuth.PrivateKey = &n.gateKey.PrivateKey
+		}
+
+		if err = n.objectDeleteWithAuth(ctx, corsBkt, obj.Object(), prmAuth); err != nil {
+			return fmt.Errorf("delete cors object: %w", err)
 		}
 	}
 

api/layer/layer.go

@@ -51,6 +51,8 @@ type (
 		cache       *Cache
 		treeService TreeService
 		features    FeatureSettings
+		gateKey     *keys.PrivateKey
+		corsCnrInfo *data.BucketInfo
 	}
 
 	Config struct {
@@ -61,6 +63,8 @@ type (
 		Resolver     BucketResolver
 		TreeService  TreeService
 		Features     FeatureSettings
+		GateKey      *keys.PrivateKey
+		CORSCnrInfo  *data.BucketInfo
 	}
 
 	// AnonymousKey contains data for anonymous requests.
@@ -233,6 +237,8 @@ func NewLayer(log *zap.Logger, frostFS FrostFS, config *Config) *Layer {
 		cache:       config.Cache,
 		treeService: config.TreeService,
 		features:    config.Features,
+		gateKey:     config.GateKey,
+		corsCnrInfo: config.CORSCnrInfo,
 	}
 }
 
@@ -285,6 +291,10 @@ func (n *Layer) reqLogger(ctx context.Context) *zap.Logger {
 }
 
 func (n *Layer) prepareAuthParameters(ctx context.Context, prm *PrmAuth, bktOwner user.ID) {
+	if prm.BearerToken != nil || prm.PrivateKey != nil {
+		return
+	}
+
 	if bd, err := middleware.GetBoxData(ctx); err == nil && bd.Gate.BearerToken != nil {
 		if bd.Gate.BearerToken.Impersonate() || bktOwner.Equals(bearer.ResolveIssuer(*bd.Gate.BearerToken)) {
 			prm.BearerToken = bd.Gate.BearerToken
@@ -751,5 +761,20 @@ func (n *Layer) DeleteBucket(ctx context.Context, p *DeleteBucketParams) error {
 	}
 
 	n.cache.DeleteBucket(p.BktInfo)
-	return n.frostFS.DeleteContainer(ctx, p.BktInfo.CID, p.SessionToken)
+
+	corsObj, err := n.treeService.GetBucketCORS(ctx, p.BktInfo)
+	if err != nil {
+		n.reqLogger(ctx).Error(logs.GetBucketCors, zap.Error(err))
+	}
+
+	err = n.frostFS.DeleteContainer(ctx, p.BktInfo.CID, p.SessionToken)
+	if err != nil {
+		return fmt.Errorf("delete container: %w", err)
+	}
+
+	if !corsObj.Container().Equals(p.BktInfo.CID) && !corsObj.Container().Equals(cid.ID{}) {
+		n.deleteCORSObject(ctx, p.BktInfo, corsObj)
+	}
+
+	return nil
 }

api/layer/object.go

@@ -151,7 +151,17 @@ func (n *Layer) initFrostFSObjectPayloadReader(ctx context.Context, p getFrostFS
 
 // objectGet returns an object with payload in the object.
 func (n *Layer) objectGet(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID) (*object.Object, error) {
+	return n.objectGetBase(ctx, bktInfo, objID, PrmAuth{})
+}
+
+// objectGetWithAuth returns an object with payload in the object. Uses provided PrmAuth.
+func (n *Layer) objectGetWithAuth(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID, auth PrmAuth) (*object.Object, error) {
+	return n.objectGetBase(ctx, bktInfo, objID, auth)
+}
+
+func (n *Layer) objectGetBase(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID, auth PrmAuth) (*object.Object, error) {
 	prm := PrmObjectRead{
+		PrmAuth:     auth,
 		Container:   bktInfo.CID,
 		Object:      objID,
 		WithHeader:  true,
@@ -460,7 +470,17 @@ func (n *Layer) headVersion(ctx context.Context, bkt *data.BucketInfo, p *HeadOb
 
 // objectDelete puts tombstone object into frostfs.
 func (n *Layer) objectDelete(ctx context.Context, bktInfo *data.BucketInfo, idObj oid.ID) error {
+	return n.objectDeleteBase(ctx, bktInfo, idObj, PrmAuth{})
+}
+
+// objectDeleteWithAuth puts tombstone object into frostfs. Uses provided PrmAuth.
+func (n *Layer) objectDeleteWithAuth(ctx context.Context, bktInfo *data.BucketInfo, idObj oid.ID, auth PrmAuth) error {
+	return n.objectDeleteBase(ctx, bktInfo, idObj, auth)
+}
+
+func (n *Layer) objectDeleteBase(ctx context.Context, bktInfo *data.BucketInfo, idObj oid.ID, auth PrmAuth) error {
 	prm := PrmObjectDelete{
+		PrmAuth:   auth,
 		Container: bktInfo.CID,
 		Object:    idObj,
 	}

api/layer/system_object.go

@@ -12,6 +12,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 )
 
@@ -159,19 +160,26 @@ func (n *Layer) getCORS(ctx context.Context, bkt *data.BucketInfo) (*data.CORSCo
 		return cors, nil
 	}
 
-	objID, err := n.treeService.GetBucketCORS(ctx, bkt)
+	addr, err := n.treeService.GetBucketCORS(ctx, bkt)
-	objIDNotFound := errorsStd.Is(err, ErrNodeNotFound)
+	objNotFound := errorsStd.Is(err, ErrNodeNotFound)
-	if err != nil && !objIDNotFound {
+	if err != nil && !objNotFound {
 		return nil, err
 	}
 
-	if objIDNotFound {
+	if objNotFound {
 		return nil, fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrNoSuchCORSConfiguration), err.Error())
 	}
 
-	obj, err := n.objectGet(ctx, bkt, objID)
+	var prmAuth PrmAuth
+	corsBkt := bkt
+	if !addr.Container().Equals(bkt.CID) && !addr.Container().Equals(cid.ID{}) {
+		corsBkt = &data.BucketInfo{CID: addr.Container()}
+		prmAuth.PrivateKey = &n.gateKey.PrivateKey
+	}
+
+	obj, err := n.objectGetWithAuth(ctx, corsBkt, addr.Object(), prmAuth)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("get cors object: %w", err)
 	}
 
 	cors := &data.CORSConfiguration{}

api/layer/tree_mock.go

@@ -110,36 +110,39 @@ func (t *TreeServiceMock) GetSettingsNode(_ context.Context, bktInfo *data.Bucke
 	return settings, nil
 }
 
-func (t *TreeServiceMock) GetBucketCORS(_ context.Context, bktInfo *data.BucketInfo) (oid.ID, error) {
+func (t *TreeServiceMock) GetBucketCORS(_ context.Context, bktInfo *data.BucketInfo) (oid.Address, error) {
 	systemMap, ok := t.system[bktInfo.CID.EncodeToString()]
 	if !ok {
-		return oid.ID{}, nil
+		return oid.Address{}, nil
 	}
 
 	node, ok := systemMap["cors"]
 	if !ok {
-		return oid.ID{}, nil
+		return oid.Address{}, nil
 	}
 
-	return node.OID, nil
+	var addr oid.Address
+	addr.SetContainer(bktInfo.CID)
+	addr.SetObject(node.OID)
+	return addr, nil
 }
 
-func (t *TreeServiceMock) PutBucketCORS(_ context.Context, bktInfo *data.BucketInfo, objID oid.ID) (oid.ID, error) {
+func (t *TreeServiceMock) PutBucketCORS(_ context.Context, bktInfo *data.BucketInfo, addr oid.Address) (oid.Address, error) {
 	systemMap, ok := t.system[bktInfo.CID.EncodeToString()]
 	if !ok {
 		systemMap = make(map[string]*data.BaseNodeVersion)
 	}
 
 	systemMap["cors"] = &data.BaseNodeVersion{
-		OID: objID,
+		OID: addr.Object(),
 	}
 
 	t.system[bktInfo.CID.EncodeToString()] = systemMap
 
-	return oid.ID{}, ErrNoNodeToRemove
+	return oid.Address{}, ErrNoNodeToRemove
 }
 
-func (t *TreeServiceMock) DeleteBucketCORS(context.Context, *data.BucketInfo) (oid.ID, error) {
+func (t *TreeServiceMock) DeleteBucketCORS(context.Context, *data.BucketInfo) (oid.Address, error) {
 	panic("implement me")
 }
 

api/layer/tree_service.go

@@ -21,17 +21,17 @@ type TreeService interface {
 	// GetBucketCORS gets an object id that corresponds to object with bucket CORS.
 	//
 	// If object id is not found returns ErrNodeNotFound error.
-	GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.ID, error)
+	GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.Address, error)
 
 	// PutBucketCORS puts a node to a system tree and returns objectID of a previous cors config which must be deleted in FrostFS.
 	//
 	// If object id to remove is not found returns ErrNoNodeToRemove error.
-	PutBucketCORS(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID) (oid.ID, error)
+	PutBucketCORS(ctx context.Context, bktInfo *data.BucketInfo, addr oid.Address) (oid.Address, error)
 
 	// DeleteBucketCORS removes a node from a system tree and returns objID which must be deleted in FrostFS.
 	//
 	// If object id to remove is not found returns ErrNoNodeToRemove error.
-	DeleteBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.ID, error)
+	DeleteBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.Address, error)
 
 	GetObjectTagging(ctx context.Context, bktInfo *data.BucketInfo, objVersion *data.NodeVersion) (map[string]string, error)
 	PutObjectTagging(ctx context.Context, bktInfo *data.BucketInfo, objVersion *data.NodeVersion, tagSet map[string]string) error

cmd/s3-gw/app.go

@@ -21,6 +21,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/cache"
+	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/handler"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
 	s3middleware "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
@@ -37,6 +38,8 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/wallet"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/tree"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
 	treepool "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree"
@@ -153,13 +156,13 @@ func (a *App) init(ctx context.Context) {
 	a.setRuntimeParameters()
 	a.initFrostfsID(ctx)
 	a.initPolicyStorage(ctx)
-	a.initAPI()
+	a.initAPI(ctx)
 	a.initMetrics()
 	a.initServers(ctx)
 	a.initTracing(ctx)
 }
 
-func (a *App) initLayer() {
+func (a *App) initLayer(ctx context.Context) {
 	a.initResolver()
 
 	// prepare random key for anonymous requests
@@ -171,6 +174,14 @@ func (a *App) initLayer() {
 	var gateOwner user.ID
 	user.IDFromKey(&gateOwner, a.key.PrivateKey.PublicKey)
 
+	var corsCnrInfo *data.BucketInfo
+	if a.cfg.IsSet(cfgContainersCORS) {
+		corsCnrInfo, err = a.fetchContainerInfo(ctx, cfgContainersCORS)
+		if err != nil {
+			a.log.Fatal(logs.CouldNotFetchCORSContainerInfo, zap.Error(err))
+		}
+	}
+
 	layerCfg := &layer.Config{
 		Cache: layer.NewCache(getCacheOptions(a.cfg, a.log)),
 		AnonKey: layer.AnonymousKey{
@@ -180,6 +191,8 @@ func (a *App) initLayer() {
 		Resolver:    a.bucketResolver,
 		TreeService: tree.NewTree(services.NewPoolWrapper(a.treePool), a.log),
 		Features:    a.settings,
+		GateKey:     a.key,
+		CORSCnrInfo: corsCnrInfo,
 	}
 
 	// prepare object layer
@@ -434,8 +447,8 @@ func (s *appSettings) RetryStrategy() handler.RetryStrategy {
 	return s.retryStrategy
 }
 
-func (a *App) initAPI() {
+func (a *App) initAPI(ctx context.Context) {
-	a.initLayer()
+	a.initLayer(ctx)
 	a.initHandler()
 }
 
@@ -1034,3 +1047,32 @@ func (a *App) tryReconnect(ctx context.Context, sr *http.Server) bool {
 
 	return len(a.unbindServers) == 0
 }
+
+func (a *App) fetchContainerInfo(ctx context.Context, cfgKey string) (info *data.BucketInfo, err error) {
+	containerString := a.cfg.GetString(cfgKey)
+
+	var id cid.ID
+	if err = id.DecodeString(containerString); err != nil {
+		if id, err = a.bucketResolver.Resolve(ctx, containerString); err != nil {
+			return nil, fmt.Errorf("resolve container name %s: %w", containerString, err)
+		}
+	}
+
+	return getContainerInfo(ctx, id, a.pool)
+}
+
+func getContainerInfo(ctx context.Context, id cid.ID, frostFSPool *pool.Pool) (*data.BucketInfo, error) {
+	prm := pool.PrmContainerGet{
+		ContainerID: id,
+	}
+
+	res, err := frostFSPool.GetContainer(ctx, prm)
+	if err != nil {
+		return nil, err
+	}
+
+	return &data.BucketInfo{
+		CID:                     id,
+		HomomorphicHashDisabled: container.IsHomomorphicHashingDisabled(res),
+	}, nil
+}

cmd/s3-gw/app_settings.go

@@ -176,6 +176,9 @@ const ( // Settings.
 
 	cfgSourceIPHeader = "source_ip_header"
 
+	// Containers.
+	cfgContainersCORS = "containers.cors"
+
 	// Command line args.
 	cmdHelp      = "help"
 	cmdVersion   = "version"

config/config.env

@@ -216,3 +216,5 @@ S3_GW_RETRY_MAX_BACKOFF=30s
 # Backoff strategy. `exponential` and `constant` are allowed.
 S3_GW_RETRY_STRATEGY=exponential
 
+# Containers properties
+S3_GW_CONTAINERS_CORS=AZjLTXfK4vs4ovxMic2xEJKSymMNLqdwq9JT64ASFCRj

config/config.yaml

@@ -252,3 +252,7 @@ retry:
   max_backoff: 30s
   # Backoff strategy. `exponential` and `constant` are allowed.
   strategy: exponential
+
+# Containers properties
+containers:
+  cors: AZjLTXfK4vs4ovxMic2xEJKSymMNLqdwq9JT64ASFCRj

docs/configuration.md

@@ -192,6 +192,7 @@ There are some custom types used for brevity:
 | `proxy`            | [Proxy contract configuration](#proxy-section)                 |
 | `namespaces`       | [Namespaces configuration](#namespaces-section)                |
 | `retry`            | [Retry configuration](#retry-section)                          |
+| `containers`       | [Containers configuration](#containers-section)                |
 
 ### General section
 
@@ -708,3 +709,15 @@ retry:
 | `max_backoff` | `duration` | yes           | `30s`         | Max delay before next attempt.                                                       |
 | `strategy`    | `string`   | yes           | `exponential` | Backoff strategy. `exponential` and `constant` are allowed.                          |
 
+# `containers` section
+
+Section for well-known containers to store s3-related data and settings.
+
+```yaml
+containers:
+   cors: AZjLTXfK4vs4ovxMic2xEJKSymMNLqdwq9JT64ASFCRj
+```
+
+| Parameter | Type     | SIGHUP reload | Default value | Description                                                                          |
+|-----------|----------|---------------|---------------|--------------------------------------------------------------------------------------|
+| `cors`    | `string` | no            |               | Container name for CORS configurations. If not set, container of the bucket is used. |

internal/logs/logs.go

@@ -142,4 +142,5 @@ const (
 	CouldntCacheSubject                                  = "couldn't cache subject info"
 	UserGroupsListIsEmpty                                = "user groups list is empty, subject not found"
 	CouldntCacheUserKey                                  = "couldn't cache user key"
+	CouldNotFetchCORSContainerInfo                       = "couldn't fetch CORS container info"
 )

pkg/service/tree/tree.go

@@ -15,6 +15,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/layer"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	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"
@@ -84,6 +85,7 @@ const (
 	ownerKeyKV          = "ownerKey"
 	lockConfigurationKV = "LockConfiguration"
 	oidKV               = "OID"
+	cidKV               = "CID"
 
 	isCombinedKV    = "IsCombined"
 	isUnversionedKV = "IsUnversioned"
@@ -399,47 +401,73 @@ func (c *Tree) PutSettingsNode(ctx context.Context, bktInfo *data.BucketInfo, se
 	return c.service.MoveNode(ctx, bktInfo, systemTree, node.ID, 0, meta)
 }
 
-func (c *Tree) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.ID, error) {
+func (c *Tree) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.Address, error) {
-	node, err := c.getSystemNode(ctx, bktInfo, []string{corsFilename}, []string{oidKV})
+	node, err := c.getSystemNode(ctx, bktInfo, []string{corsFilename}, []string{oidKV, cidKV})
 	if err != nil {
-		return oid.ID{}, err
+		return oid.Address{}, err
 	}
 
-	return node.ObjID, nil
+	return getCORSAddress(node)
 }
 
-func (c *Tree) PutBucketCORS(ctx context.Context, bktInfo *data.BucketInfo, objID oid.ID) (oid.ID, error) {
+func (c *Tree) PutBucketCORS(ctx context.Context, bktInfo *data.BucketInfo, addr oid.Address) (oid.Address, error) {
-	node, err := c.getSystemNode(ctx, bktInfo, []string{corsFilename}, []string{oidKV})
+	node, err := c.getSystemNode(ctx, bktInfo, []string{corsFilename}, []string{oidKV, cidKV})
 	isErrNotFound := errors.Is(err, layer.ErrNodeNotFound)
 	if err != nil && !isErrNotFound {
-		return oid.ID{}, fmt.Errorf("couldn't get node: %w", err)
+		return oid.Address{}, fmt.Errorf("couldn't get node: %w", err)
 	}
 
 	meta := make(map[string]string)
 	meta[FileNameKey] = corsFilename
-	meta[oidKV] = objID.EncodeToString()
+	meta[oidKV] = addr.Object().EncodeToString()
+	meta[cidKV] = addr.Container().EncodeToString()
 
 	if isErrNotFound {
 		if _, err = c.service.AddNode(ctx, bktInfo, systemTree, 0, meta); err != nil {
-			return oid.ID{}, err
+			return oid.Address{}, err
 		}
-		return oid.ID{}, layer.ErrNoNodeToRemove
+		return oid.Address{}, layer.ErrNoNodeToRemove
 	}
 
-	return node.ObjID, c.service.MoveNode(ctx, bktInfo, systemTree, node.ID, 0, meta)
+	prevAddr, err := getCORSAddress(node)
+	if err != nil {
+		return oid.Address{}, fmt.Errorf("couldn't get cors object addr: %w", err)
+	}
+
+	return prevAddr, c.service.MoveNode(ctx, bktInfo, systemTree, node.ID, 0, meta)
 }
 
-func (c *Tree) DeleteBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.ID, error) {
+func (c *Tree) DeleteBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (oid.Address, error) {
-	node, err := c.getSystemNode(ctx, bktInfo, []string{corsFilename}, []string{oidKV})
+	node, err := c.getSystemNode(ctx, bktInfo, []string{corsFilename}, []string{oidKV, cidKV})
 	if err != nil && !errors.Is(err, layer.ErrNodeNotFound) {
-		return oid.ID{}, err
+		return oid.Address{}, err
 	}
 
 	if node != nil {
-		return node.ObjID, c.service.RemoveNode(ctx, bktInfo, systemTree, node.ID)
+		addr, err := getCORSAddress(node)
+		if err != nil {
+			return oid.Address{}, fmt.Errorf("couldn't get cors object addr: %w", err)
+		}
+
+		return addr, c.service.RemoveNode(ctx, bktInfo, systemTree, node.ID)
 	}
 
-	return oid.ID{}, layer.ErrNoNodeToRemove
+	return oid.Address{}, layer.ErrNoNodeToRemove
+}
+
+func getCORSAddress(node *treeNode) (oid.Address, error) {
+	var addr oid.Address
+	addr.SetObject(node.ObjID)
+
+	if cidStr, ok := node.Get(cidKV); ok {
+		var cnrID cid.ID
+		if err := cnrID.DecodeString(cidStr); err != nil {
+			return oid.Address{}, fmt.Errorf("couldn't decode cid: %w", err)
+		}
+		addr.SetContainer(cnrID)
+	}
+
+	return addr, nil
 }
 
 func (c *Tree) GetObjectTagging(ctx context.Context, bktInfo *data.BucketInfo, objVersion *data.NodeVersion) (map[string]string, error) {