[#XX] Update SDK

Need fix TrueCloudLab/frostfs-sdk-go#282 Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>
[#160 ] Add documentation for multinet settings
2024-11-05 17:50:50 +03:00 · 2024-10-31 11:38:54 +03:00 · 2024-10-31 11:38:49 +03:00 · 2024-10-31 11:38:41 +03:00 · 2024-10-25 09:31:59 +03:00 · 2024-10-25 09:30:58 +03:00
15 changed files with 679 additions and 145 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -7,6 +7,7 @@ This document outlines major changes between releases.
 ### Added
 - Support percent-encoding for GET queries (#134)
 - Add `trace_id` to logs (#148)
+- Add `cors` config params (#158)

 ### Changed
 - Update go version to 1.22 (#132)
--- a/cmd/http-gw/app.go
+++ b/cmd/http-gw/app.go
@ -6,7 +6,6 @@ import (
 	"crypto/x509"
 	"errors"
 	"fmt"
-	"io"
 	"net/http"
 	"os"
 	"os/signal"
@ -22,6 +21,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	internalnet "git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/net"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/service/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/templates"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/metrics"
@ -88,16 +88,32 @@ type (
 	// appSettings stores reloading parameters, so it has to provide getters and setters which use RWMutex.
 	appSettings struct {
 		reconnectInterval time.Duration
+		dialerSource      *internalnet.DialerSource

-		mu                  sync.RWMutex
-		defaultTimestamp    bool
-		zipCompression      bool
-		clientCut           bool
-		returnIndexPage     bool
-		indexPageTemplate   string
-		bufferMaxSizeForPut uint64
-		namespaceHeader     string
-		defaultNamespaces   []string
+		mu                   sync.RWMutex
+		defaultTimestamp     bool
+		zipCompression       bool
+		clientCut            bool
+		returnIndexPage      bool
+		indexPageTemplate    string
+		bufferMaxSizeForPut  uint64
+		namespaceHeader      string
+		defaultNamespaces    []string
+		corsAllowOrigin      string
+		corsAllowMethods     []string
+		corsAllowHeaders     []string
+		corsExposeHeaders    []string
+		corsAllowCredentials bool
+		corsMaxAge           int
+	}
+
+	CORS struct {
+		AllowOrigin      string
+		AllowMethods     []string
+		AllowHeaders     []string
+		ExposeHeaders    []string
+		AllowCredentials bool
+		MaxAge           int
 	}
 )

@ -134,6 +150,8 @@ func newApp(ctx context.Context, opt ...Option) App {
 		opt[i](a)
 	}

+	a.initAppSettings()
+
 	// -- setup FastHTTP server --
 	a.webServer.Name = "frost-http-gw"
 	a.webServer.ReadBufferSize = a.cfg.GetInt(cfgWebReadBufferSize)
@ -147,7 +165,7 @@ func newApp(ctx context.Context, opt ...Option) App {
 	a.webServer.DisablePreParseMultipartForm = true
 	a.webServer.StreamRequestBody = a.cfg.GetBool(cfgWebStreamRequestBody)
 	// -- -- -- -- -- -- -- -- -- -- -- -- -- --
-	a.pool, a.treePool, a.key = getPools(ctx, a.log, a.cfg)
+	a.pool, a.treePool, a.key = getPools(ctx, a.log, a.cfg, a.settings.dialerSource)

 	var owner user.ID
 	user.IDFromKey(&owner, a.key.PrivateKey.PublicKey)
@ -155,27 +173,63 @@ func newApp(ctx context.Context, opt ...Option) App {

 	a.setRuntimeParameters()

-	a.initAppSettings()
 	a.initResolver()
 	a.initMetrics()
 	a.initTracing(ctx)
-	a.loadIndexPageTemplate()

 	return a
 }

+func (a *app) initAppSettings() {
+	a.settings = &appSettings{
+		reconnectInterval: fetchReconnectInterval(a.cfg),
+		dialerSource:      getDialerSource(a.log, a.cfg),
+	}
+	a.settings.update(a.cfg, a.log)
+}
+
+func (s *appSettings) update(v *viper.Viper, l *zap.Logger) {
+	defaultTimestamp := v.GetBool(cfgUploaderHeaderEnableDefaultTimestamp)
+	zipCompression := v.GetBool(cfgZipCompression)
+	returnIndexPage := v.GetBool(cfgIndexPageEnabled)
+	clientCut := v.GetBool(cfgClientCut)
+	bufferMaxSizeForPut := v.GetUint64(cfgBufferMaxSizeForPut)
+	namespaceHeader := v.GetString(cfgResolveNamespaceHeader)
+	defaultNamespaces := fetchDefaultNamespaces(v)
+	indexPage, indexEnabled := fetchIndexPageTemplate(v, l)
+	corsAllowOrigin := v.GetString(cfgCORSAllowOrigin)
+	corsAllowMethods := v.GetStringSlice(cfgCORSAllowMethods)
+	corsAllowHeaders := v.GetStringSlice(cfgCORSAllowHeaders)
+	corsExposeHeaders := v.GetStringSlice(cfgCORSExposeHeaders)
+	corsAllowCredentials := v.GetBool(cfgCORSAllowCredentials)
+	corsMaxAge := fetchCORSMaxAge(v)
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	s.defaultTimestamp = defaultTimestamp
+	s.zipCompression = zipCompression
+	s.returnIndexPage = returnIndexPage
+	s.clientCut = clientCut
+	s.bufferMaxSizeForPut = bufferMaxSizeForPut
+	s.namespaceHeader = namespaceHeader
+	s.defaultNamespaces = defaultNamespaces
+	s.returnIndexPage = indexEnabled
+	s.indexPageTemplate = indexPage
+	s.corsAllowOrigin = corsAllowOrigin
+	s.corsAllowMethods = corsAllowMethods
+	s.corsAllowHeaders = corsAllowHeaders
+	s.corsExposeHeaders = corsExposeHeaders
+	s.corsAllowCredentials = corsAllowCredentials
+	s.corsMaxAge = corsMaxAge
+}
+
 func (s *appSettings) DefaultTimestamp() bool {
 	s.mu.RLock()
 	defer s.mu.RUnlock()
 	return s.defaultTimestamp
 }

-func (s *appSettings) setDefaultTimestamp(val bool) {
-	s.mu.Lock()
-	s.defaultTimestamp = val
-	s.mu.Unlock()
-}
-
 func (s *appSettings) ZipCompression() bool {
 	s.mu.RLock()
 	defer s.mu.RUnlock()
@ -197,42 +251,27 @@ func (s *appSettings) IndexPageTemplate() string {
 	return s.indexPageTemplate
 }

-func (s *appSettings) setZipCompression(val bool) {
-	s.mu.Lock()
-	s.zipCompression = val
-	s.mu.Unlock()
-}
+func (s *appSettings) CORS() CORS {
+	s.mu.RLock()
+	defer s.mu.RUnlock()

-func (s *appSettings) setReturnIndexPage(val bool) {
-	s.mu.Lock()
-	s.returnIndexPage = val
-	s.mu.Unlock()
-}
+	allowMethods := make([]string, len(s.corsAllowMethods))
+	copy(allowMethods, s.corsAllowMethods)

-func (s *appSettings) setIndexTemplate(val string) {
-	s.mu.Lock()
-	s.indexPageTemplate = val
-	s.mu.Unlock()
-}
+	allowHeaders := make([]string, len(s.corsAllowHeaders))
+	copy(allowHeaders, s.corsAllowHeaders)

-func (a *app) loadIndexPageTemplate() {
-	if !a.settings.IndexPageEnabled() {
-		return
+	exposeHeaders := make([]string, len(s.corsExposeHeaders))
+	copy(exposeHeaders, s.corsExposeHeaders)
+
+	return CORS{
+		AllowOrigin:      s.corsAllowOrigin,
+		AllowMethods:     allowMethods,
+		AllowHeaders:     allowHeaders,
+		ExposeHeaders:    exposeHeaders,
+		AllowCredentials: s.corsAllowCredentials,
+		MaxAge:           s.corsMaxAge,
 	}
-	reader, err := os.Open(a.cfg.GetString(cfgIndexPageTemplatePath))
-	if err != nil {
-		a.settings.setIndexTemplate("")
-		a.log.Warn(logs.FailedToReadIndexPageTemplate, zap.Error(err))
-		return
-	}
-	tmpl, err := io.ReadAll(reader)
-	if err != nil {
-		a.settings.setIndexTemplate("")
-		a.log.Warn(logs.FailedToReadIndexPageTemplate, zap.Error(err))
-		return
-	}
-	a.settings.setIndexTemplate(string(tmpl))
-	a.log.Info(logs.SetCustomIndexPageTemplate)
 }

 func (s *appSettings) ClientCut() bool {
@ -241,29 +280,27 @@ func (s *appSettings) ClientCut() bool {
 	return s.clientCut
 }

-func (s *appSettings) setClientCut(val bool) {
-	s.mu.Lock()
-	s.clientCut = val
-	s.mu.Unlock()
-}
-
 func (s *appSettings) BufferMaxSizeForPut() uint64 {
 	s.mu.RLock()
 	defer s.mu.RUnlock()
 	return s.bufferMaxSizeForPut
 }

-func (s *appSettings) setBufferMaxSizeForPut(val uint64) {
-	s.mu.Lock()
-	s.bufferMaxSizeForPut = val
-	s.mu.Unlock()
+func (s *appSettings) NamespaceHeader() string {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.namespaceHeader
 }

-func (a *app) initAppSettings() {
-	a.settings = &appSettings{
-		reconnectInterval: fetchReconnectInterval(a.cfg),
+func (s *appSettings) FormContainerZone(ns string) (zone string, isDefault bool) {
+	s.mu.RLock()
+	namespaces := s.defaultNamespaces
+	s.mu.RUnlock()
+	if slices.Contains(namespaces, ns) {
+		return v2container.SysAttributeZoneDefault, true
 	}
-	a.updateSettings()
+
+	return ns + ".ns", false
 }

 func (a *app) initResolver() {
@ -526,6 +563,10 @@ func (a *app) configReload(ctx context.Context) {
 		a.logLevel.SetLevel(lvl)
 	}

+	if err := a.settings.dialerSource.Update(fetchMultinetConfig(a.cfg, a.log)); err != nil {
+		a.log.Warn(logs.MultinetConfigWontBeUpdated, zap.Error(err))
+	}
+
 	if err := a.resolver.UpdateResolvers(a.getResolverConfig()); err != nil {
 		a.log.Warn(logs.FailedToUpdateResolvers, zap.Error(err))
 	}
@ -539,26 +580,15 @@ func (a *app) configReload(ctx context.Context) {
 	a.stopServices()
 	a.startServices()

-	a.updateSettings()
+	a.settings.update(a.cfg, a.log)

 	a.metrics.SetEnabled(a.cfg.GetBool(cfgPrometheusEnabled))
 	a.initTracing(ctx)
-	a.loadIndexPageTemplate()
 	a.setHealthStatus()

 	a.log.Info(logs.SIGHUPConfigReloadCompleted)
 }

-func (a *app) updateSettings() {
-	a.settings.setDefaultTimestamp(a.cfg.GetBool(cfgUploaderHeaderEnableDefaultTimestamp))
-	a.settings.setZipCompression(a.cfg.GetBool(cfgZipCompression))
-	a.settings.setReturnIndexPage(a.cfg.GetBool(cfgIndexPageEnabled))
-	a.settings.setClientCut(a.cfg.GetBool(cfgClientCut))
-	a.settings.setBufferMaxSizeForPut(a.cfg.GetUint64(cfgBufferMaxSizeForPut))
-	a.settings.setNamespaceHeader(a.cfg.GetString(cfgResolveNamespaceHeader))
-	a.settings.setDefaultNamespaces(a.cfg.GetStringSlice(cfgResolveDefaultNamespaces))
-}
-
 func (a *app) startServices() {
 	pprofConfig := metrics.Config{Enabled: a.cfg.GetBool(cfgPprofEnabled), Address: a.cfg.GetString(cfgPprofAddress)}
 	pprofService := metrics.NewPprofService(a.log, pprofConfig)
@ -579,7 +609,6 @@ func (a *app) stopServices() {
 		svc.ShutDown(ctx)
 	}
 }
-
 func (a *app) configureRouter(handler *handler.Handler) {
 	r := router.New()
 	r.RedirectTrailingSlash = true
@ -590,20 +619,96 @@ func (a *app) configureRouter(handler *handler.Handler) {
 		response.Error(r, "Method Not Allowed", fasthttp.StatusMethodNotAllowed)
 	}

-	r.POST("/upload/{cid}", a.tracer(a.logger(a.canonicalizer(a.tokenizer(a.reqNamespace(handler.Upload))))))
+	r.POST("/upload/{cid}", a.addMiddlewares(handler.Upload))
+	r.OPTIONS("/upload/{cid}", a.addPreflight())
 	a.log.Info(logs.AddedPathUploadCid)
-	r.GET("/get/{cid}/{oid:*}", a.tracer(a.logger(a.canonicalizer(a.tokenizer(a.reqNamespace(handler.DownloadByAddressOrBucketName))))))
-	r.HEAD("/get/{cid}/{oid:*}", a.tracer(a.logger(a.canonicalizer(a.tokenizer(a.reqNamespace(handler.HeadByAddressOrBucketName))))))
+	r.GET("/get/{cid}/{oid:*}", a.addMiddlewares(handler.DownloadByAddressOrBucketName))
+	r.HEAD("/get/{cid}/{oid:*}", a.addMiddlewares(handler.HeadByAddressOrBucketName))
+	r.OPTIONS("/get/{cid}/{oid:*}", a.addPreflight())
 	a.log.Info(logs.AddedPathGetCidOid)
-	r.GET("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.tracer(a.logger(a.canonicalizer(a.tokenizer(a.reqNamespace(handler.DownloadByAttribute))))))
-	r.HEAD("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.tracer(a.logger(a.canonicalizer(a.tokenizer(a.reqNamespace(handler.HeadByAttribute))))))
+	r.GET("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.addMiddlewares(handler.DownloadByAttribute))
+	r.HEAD("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.addMiddlewares(handler.HeadByAttribute))
+	r.OPTIONS("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.addPreflight())
 	a.log.Info(logs.AddedPathGetByAttributeCidAttrKeyAttrVal)
-	r.GET("/zip/{cid}/{prefix:*}", a.tracer(a.logger(a.canonicalizer(a.tokenizer(a.reqNamespace(handler.DownloadZipped))))))
+	r.GET("/zip/{cid}/{prefix:*}", a.addMiddlewares(handler.DownloadZipped))
+	r.OPTIONS("/zip/{cid}/{prefix:*}", a.addPreflight())
 	a.log.Info(logs.AddedPathZipCidPrefix)

 	a.webServer.Handler = r.Handler
 }

+func (a *app) addMiddlewares(h fasthttp.RequestHandler) fasthttp.RequestHandler {
+	list := []func(fasthttp.RequestHandler) fasthttp.RequestHandler{
+		a.tracer,
+		a.logger,
+		a.canonicalizer,
+		a.tokenizer,
+		a.reqNamespace,
+		a.cors,
+	}
+
+	for i := len(list) - 1; i >= 0; i-- {
+		h = list[i](h)
+	}
+
+	return h
+}
+
+func (a *app) addPreflight() fasthttp.RequestHandler {
+	list := []func(fasthttp.RequestHandler) fasthttp.RequestHandler{
+		a.tracer,
+		a.logger,
+		a.reqNamespace,
+	}
+
+	h := a.preflightHandler
+	for i := len(list) - 1; i >= 0; i-- {
+		h = list[i](h)
+	}
+
+	return h
+}
+
+func (a *app) preflightHandler(c *fasthttp.RequestCtx) {
+	cors := a.settings.CORS()
+	setCORSHeaders(c, cors)
+}
+
+func (a *app) cors(h fasthttp.RequestHandler) fasthttp.RequestHandler {
+	return func(c *fasthttp.RequestCtx) {
+		h(c)
+		code := c.Response.StatusCode()
+		if code >= fasthttp.StatusOK && code < fasthttp.StatusMultipleChoices {
+			cors := a.settings.CORS()
+			setCORSHeaders(c, cors)
+		}
+	}
+}
+
+func setCORSHeaders(c *fasthttp.RequestCtx, cors CORS) {
+	c.Response.Header.Set(fasthttp.HeaderAccessControlMaxAge, strconv.Itoa(cors.MaxAge))
+
+	if len(cors.AllowOrigin) != 0 {
+		c.Response.Header.Set(fasthttp.HeaderAccessControlAllowOrigin, cors.AllowOrigin)
+	}
+
+	if len(cors.AllowMethods) != 0 {
+		c.Response.Header.Set(fasthttp.HeaderAccessControlAllowMethods, strings.Join(cors.AllowMethods, ","))
+	}
+
+	if len(cors.AllowHeaders) != 0 {
+		c.Response.Header.Set(fasthttp.HeaderAccessControlAllowHeaders, strings.Join(cors.AllowHeaders, ","))
+	}
+
+	if len(cors.ExposeHeaders) != 0 {
+		c.Response.Header.Set(fasthttp.HeaderAccessControlExposeHeaders, strings.Join(cors.ExposeHeaders, ","))
+	}
+
+	if cors.AllowCredentials {
+		c.Response.Header.Set(fasthttp.HeaderAccessControlAllowCredentials, "true")
+	}
+}
+
 func (a *app) logger(h fasthttp.RequestHandler) fasthttp.RequestHandler {
 	return func(req *fasthttp.RequestCtx) {
 		requiredFields := []zap.Field{zap.Uint64("id", req.ID())}
@ -847,39 +952,6 @@ func (a *app) setRuntimeParameters() {
 	}
 }

-func (s *appSettings) NamespaceHeader() string {
-	s.mu.RLock()
-	defer s.mu.RUnlock()
-	return s.namespaceHeader
-}
-
-func (s *appSettings) setNamespaceHeader(nsHeader string) {
-	s.mu.Lock()
-	s.namespaceHeader = nsHeader
-	s.mu.Unlock()
-}
-
-func (s *appSettings) FormContainerZone(ns string) (zone string, isDefault bool) {
-	s.mu.RLock()
-	namespaces := s.defaultNamespaces
-	s.mu.RUnlock()
-	if slices.Contains(namespaces, ns) {
-		return v2container.SysAttributeZoneDefault, true
-	}
-
-	return ns + ".ns", false
-}
-
-func (s *appSettings) setDefaultNamespaces(namespaces []string) {
-	for i := range namespaces { // to be set namespaces in env variable as `HTTP_GW_RESOLVE_BUCKET_DEFAULT_NAMESPACES="" "root"`
-		namespaces[i] = strings.Trim(namespaces[i], "\"")
-	}
-
-	s.mu.Lock()
-	s.defaultNamespaces = namespaces
-	s.mu.Unlock()
-}
-
 func (a *app) scheduleReconnect(ctx context.Context, srv *fasthttp.Server) {
 	go func() {
 		t := time.NewTicker(a.settings.reconnectInterval)
--- a/cmd/http-gw/integration_test.go
+++ b/cmd/http-gw/integration_test.go
@ -102,7 +102,7 @@ func runServer(pathToWallet string) (App, context.CancelFunc) {
 	v.Set(cfgWalletPath, pathToWallet)
 	v.Set(cfgWalletPassphrase, "")

-	l, lvl := newStdoutLogger(zapcore.DebugLevel)
+	l, lvl := newStdoutLogger(v, zapcore.DebugLevel)
 	application := newApp(cancelCtx, WithConfig(v), WithLogger(l, lvl))
 	go application.Serve()

@ -525,7 +525,7 @@ func putObject(ctx context.Context, t *testing.T, clientPool *pool.Pool, ownerID
 	id, err := clientPool.PutObject(ctx, prm)
 	require.NoError(t, err)

-	return id
+	return id.ObjectID
 }

 func makeBearerToken(t *testing.T, key *keys.PrivateKey, ownerID user.ID, version string) string {
--- a/cmd/http-gw/settings.go
+++ b/cmd/http-gw/settings.go
@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/hex"
 	"fmt"
+	"io"
 	"math"
 	"os"
 	"path"
@ -15,6 +16,7 @@ import (

 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/cache"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	internalnet "git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/net"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
 	grpctracing "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing/grpc"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
@ -55,6 +57,10 @@ const (

 	defaultReconnectInterval = time.Minute

+	defaultCORSMaxAge = 600 // seconds
+
+	defaultMultinetFallbackDelay = 300 * time.Millisecond
+
 	cfgServer      = "server"
 	cfgTLSEnabled  = "tls.enabled"
 	cfgTLSCertFile = "tls.cert_file"
@ -140,6 +146,21 @@ const (
 	cfgResolveNamespaceHeader   = "resolve_bucket.namespace_header"
 	cfgResolveDefaultNamespaces = "resolve_bucket.default_namespaces"

+	// CORS.
+	cfgCORSAllowOrigin      = "cors.allow_origin"
+	cfgCORSAllowMethods     = "cors.allow_methods"
+	cfgCORSAllowHeaders     = "cors.allow_headers"
+	cfgCORSExposeHeaders    = "cors.expose_headers"
+	cfgCORSAllowCredentials = "cors.allow_credentials"
+	cfgCORSMaxAge           = "cors.max_age"
+
+	// Multinet.
+	cfgMultinetEnabled       = "multinet.enabled"
+	cfgMultinetBalancer      = "multinet.balancer"
+	cfgMultinetRestrict      = "multinet.restrict"
+	cfgMultinetFallbackDelay = "multinet.fallback_delay"
+	cfgMultinetSubnets       = "multinet.subnets"
+
 	// Command line args.
 	cmdHelp          = "help"
 	cmdVersion       = "version"
@ -234,6 +255,9 @@ func settings() *viper.Viper {
 	v.SetDefault(cfgResolveNamespaceHeader, defaultNamespaceHeader)
 	v.SetDefault(cfgResolveDefaultNamespaces, []string{"", "root"})

+	// multinet
+	v.SetDefault(cfgMultinetFallbackDelay, defaultMultinetFallbackDelay)
+
 	// Binding flags
 	if err := v.BindPFlag(cfgPprofEnabled, flags.Lookup(cmdPprof)); err != nil {
 		panic(err)
@ -505,6 +529,46 @@ func fetchReconnectInterval(cfg *viper.Viper) time.Duration {
 	return reconnect
 }

+func fetchIndexPageTemplate(v *viper.Viper, l *zap.Logger) (string, bool) {
+	if !v.GetBool(cfgIndexPageEnabled) {
+		return "", false
+	}
+
+	reader, err := os.Open(v.GetString(cfgIndexPageTemplatePath))
+	if err != nil {
+		l.Warn(logs.FailedToReadIndexPageTemplate, zap.Error(err))
+		return "", true
+	}
+
+	tmpl, err := io.ReadAll(reader)
+	if err != nil {
+		l.Warn(logs.FailedToReadIndexPageTemplate, zap.Error(err))
+		return "", true
+	}
+
+	l.Info(logs.SetCustomIndexPageTemplate)
+	return string(tmpl), true
+}
+
+func fetchDefaultNamespaces(v *viper.Viper) []string {
+	namespaces := v.GetStringSlice(cfgResolveDefaultNamespaces)
+
+	for i := range namespaces { // to be set namespaces in env variable as `HTTP_GW_RESOLVE_BUCKET_DEFAULT_NAMESPACES="" "root"`
+		namespaces[i] = strings.Trim(namespaces[i], "\"")
+	}
+
+	return namespaces
+}
+
+func fetchCORSMaxAge(v *viper.Viper) int {
+	maxAge := v.GetInt(cfgCORSMaxAge)
+	if maxAge <= 0 {
+		maxAge = defaultCORSMaxAge
+	}
+
+	return maxAge
+}
+
 func fetchServers(v *viper.Viper, log *zap.Logger) []ServerInfo {
 	var servers []ServerInfo
 	seen := make(map[string]struct{})
@ -533,7 +597,7 @@ func fetchServers(v *viper.Viper, log *zap.Logger) []ServerInfo {
 	return servers
 }

-func getPools(ctx context.Context, logger *zap.Logger, cfg *viper.Viper) (*pool.Pool, *treepool.Pool, *keys.PrivateKey) {
+func getPools(ctx context.Context, logger *zap.Logger, cfg *viper.Viper, dialSource *internalnet.DialerSource) (*pool.Pool, *treepool.Pool, *keys.PrivateKey) {
 	key, err := getFrostFSKey(cfg, logger)
 	if err != nil {
 		logger.Fatal(logs.CouldNotLoadFrostFSPrivateKey, zap.Error(err))
@ -589,18 +653,13 @@ func getPools(ctx context.Context, logger *zap.Logger, cfg *viper.Viper) (*pool.

 	prmTree.SetMaxRequestAttempts(cfg.GetInt(cfgTreePoolMaxAttempts))

-	var apiGRPCDialOpts []grpc.DialOption
-	var treeGRPCDialOpts []grpc.DialOption
-	if cfg.GetBool(cfgTracingEnabled) {
-		interceptors := []grpc.DialOption{
-			grpc.WithUnaryInterceptor(grpctracing.NewUnaryClientInteceptor()),
-			grpc.WithStreamInterceptor(grpctracing.NewStreamClientInterceptor()),
-		}
-		treeGRPCDialOpts = append(treeGRPCDialOpts, interceptors...)
-		apiGRPCDialOpts = append(apiGRPCDialOpts, interceptors...)
+	interceptors := []grpc.DialOption{
+		grpc.WithUnaryInterceptor(grpctracing.NewUnaryClientInteceptor()),
+		grpc.WithStreamInterceptor(grpctracing.NewStreamClientInterceptor()),
+		grpc.WithContextDialer(dialSource.GrpcContextDialer()),
 	}
-	prm.SetGRPCDialOptions(apiGRPCDialOpts...)
-	prmTree.SetGRPCDialOptions(treeGRPCDialOpts...)
+	prm.SetGRPCDialOptions(interceptors...)
+	prmTree.SetGRPCDialOptions(interceptors...)

 	p, err := pool.NewPool(prm)
 	if err != nil {
@ -700,3 +759,34 @@ func fetchCacheSize(v *viper.Viper, l *zap.Logger, cfgEntry string, defaultValue

 	return defaultValue
 }
+
+func getDialerSource(logger *zap.Logger, cfg *viper.Viper) *internalnet.DialerSource {
+	source, err := internalnet.NewDialerSource(fetchMultinetConfig(cfg, logger))
+	if err != nil {
+		logger.Fatal(logs.FailedToLoadMultinetConfig, zap.Error(err))
+	}
+	return source
+}
+
+func fetchMultinetConfig(v *viper.Viper, l *zap.Logger) (cfg internalnet.Config) {
+	cfg.Enabled = v.GetBool(cfgMultinetEnabled)
+	cfg.Balancer = v.GetString(cfgMultinetBalancer)
+	cfg.Restrict = v.GetBool(cfgMultinetRestrict)
+	cfg.FallbackDelay = v.GetDuration(cfgMultinetFallbackDelay)
+	cfg.Subnets = make([]internalnet.Subnet, 0, 5)
+	cfg.EventHandler = internalnet.NewLogEventHandler(l)
+
+	for i := 0; ; i++ {
+		key := cfgMultinetSubnets + "." + strconv.Itoa(i) + "."
+		subnet := internalnet.Subnet{}
+
+		subnet.Prefix = v.GetString(key + "mask")
+		if subnet.Prefix == "" {
+			break
+		}
+		subnet.SourceIPs = v.GetStringSlice(key + "source_ips")
+		cfg.Subnets = append(cfg.Subnets, subnet)
+	}
+
+	return
+}
--- a/config/config.env
+++ b/config/config.env
@ -126,3 +126,23 @@ HTTP_GW_RESOLVE_BUCKET_DEFAULT_NAMESPACES="" "root"
 # Max attempt to make successful tree request.
 # default value is 0 that means the number of attempts equals to number of nodes in pool.
 HTTP_GW_FROSTFS_TREE_POOL_MAX_ATTEMPTS=0
+
+HTTP_GW_CORS_ALLOW_ORIGIN="*"
+HTTP_GW_CORS_ALLOW_METHODS="GET" "POST"
+HTTP_GW_CORS_ALLOW_HEADERS="*"
+HTTP_GW_CORS_EXPOSE_HEADERS="*"
+HTTP_GW_CORS_ALLOW_CREDENTIALS=false
+HTTP_GW_CORS_MAX_AGE=600
+
+# Multinet properties
+# Enable multinet support
+HTTP_GW_MULTINET_ENABLED=false
+# Strategy to pick source IP address
+HTTP_GW_MULTINET_BALANCER=roundrobin
+# Restrict requests with unknown destination subnet
+HTTP_GW_MULTINET_RESTRICT=false
+# Delay between ipv6 to ipv4 fallback switch
+HTTP_GW_MULTINET_FALLBACK_DELAY=300ms
+# List of subnets and IP addresses to use as source for those subnets
+HTTP_GW_MULTINET_SUBNETS_1_MASK=1.2.3.4/24
+HTTP_GW_MULTINET_SUBNETS_1_SOURCE_IPS=1.2.3.4 1.2.3.5
--- a/config/config.yaml
+++ b/config/config.yaml
@ -138,3 +138,28 @@ cache:
 resolve_bucket:
  namespace_header: X-Frostfs-Namespace
  default_namespaces: [ "", "root" ]
+
+cors:
+  allow_origin: ""
+  allow_methods: []
+  allow_headers: []
+  expose_headers: []
+  allow_credentials: false
+  max_age: 600
+
+# Multinet properties
+multinet:
+  # Enable multinet support
+  enabled: false
+  # Strategy to pick source IP address
+  balancer: roundrobin
+  # Restrict requests with unknown destination subnet
+  restrict: false
+  # Delay between ipv6 to ipv4 fallback switch
+  fallback_delay: 300ms
+  # List of subnets and IP addresses to use as source for those subnets
+  subnets:
+    - mask: 1.2.3.4/24
+      source_ips:
+        - 1.2.3.4
+        - 1.2.3.5
--- a/docs/gate-configuration.md
+++ b/docs/gate-configuration.md
@ -58,6 +58,7 @@ $ cat http.log
 | `cache`          | [Cache configuration](#cache-section)                          |
 | `resolve_bucket` | [Bucket name resolving configuration](#resolve_bucket-section) |
 | `index_page`     | [Index page configuration](#index_page-section)                |
+| `multinet`       | [Multinet configuration](#multinet-section)                    |


 # General section
@ -271,7 +272,7 @@ tracing:

 | Parameter    | Type     | SIGHUP reload | Default value | Description                                                                                                                     |
 |--------------|----------|---------------|---------------|---------------------------------------------------------------------------------------------------------------------------------|
-| `enabled`    | `bool`   | no            | `false`       | Flag to enable the tracing.                                                                                                     |
+| `enabled`    | `bool`   | yes           | `false`       | Flag to enable the tracing.                                                                                                     |
 | `exporter`   | `string` | yes           |               | Trace collector type (`stdout` or `otlp_grpc` are supported).                                                                   |
 | `endpoint`   | `string` | yes           |               | Address of collector endpoint for OTLP exporters.                                                                               |
 | `trusted_ca` | `string` | yes           |               | Path to certificate of a certification authority in pem format, that issued the TLS certificate of the telemetry remote server. |
@ -363,3 +364,66 @@ index_page:
 |-----------------|----------|---------------|---------------|---------------------------------------------------------------------------------|
 | `enabled`       | `bool`   | yes           | `false`       | Flag to enable index_page return if no object with specified S3-name was found. |
 | `template_path` | `string` | yes           | `""`          | Path to .gotmpl file with html template for index_page.                         |
+
+# `cors` section
+
+Parameters for CORS (used in OPTIONS requests and responses in all handlers).
+If values are not set, headers will not be included to response.
+
+```yaml
+cors:
+  allow_origin: "*"
+  allow_methods: ["GET", "HEAD"]
+  allow_headers: ["Authorization"]
+  expose_headers: ["*"]
+  allow_credentials: false
+  max_age: 600
+```
+
+| Parameter           | Type       | SIGHUP reload | Default value | Description                                            |
+|---------------------|------------|---------------|---------------|--------------------------------------------------------|
+| `allow_origin`      | `string`   | yes           |               | Values for `Access-Control-Allow-Origin` headers.      |
+| `allow_methods`     | `[]string` | yes           |               | Values for `Access-Control-Allow-Methods` headers.     |
+| `allow_headers`     | `[]string` | yes           |               | Values for `Access-Control-Allow-Headers` headers.     |
+| `expose_headers`    | `[]string` | yes           |               | Values for `Access-Control-Expose-Headers` headers.    |
+| `allow_credentials` | `bool`     | yes           | `false`       | Values for `Access-Control-Allow-Credentials` headers. |
+| `max_age`           | `int`      | yes           | `600`         | Values for `Access-Control-Max-Age ` headers.          |
+
+# `multinet` section
+
+Configuration of multinet support.
+
+```yaml
+multinet:
+   enabled: false
+   balancer: roundrobin
+   restrict: false
+   fallback_delay: 300ms
+   subnets:
+      - mask: 1.2.3.4/24
+        source_ips:
+           - 1.2.3.4
+           - 1.2.3.5
+```
+
+| Parameter        | Type                           | SIGHUP reload | Default value | Description                                                                                |
+|------------------|--------------------------------|---------------|---------------|--------------------------------------------------------------------------------------------|
+| `enabled`        | `bool`                         | yes           | `false`       | Enables multinet setting to manage source ip of outcoming requests.                        |
+| `balancer`       | `string`                       | yes           | `""`          | Strategy to pick source IP. By default picks first address. Supports `roundrobin` setting. |
+| `restrict`       | `bool`                         | yes           | `false`       | Restricts requests to an undefined subnets.                                                |
+| `fallback_delay` | `duration`                     | yes           | `300ms`       | Delay between IPv6 and IPv4 fallback stack switch.                                         |
+| `subnets`        | [[]Subnet](#subnet-subsection) | yes           |               | Set of subnets to apply multinet dial settings.                                            |
+
+#### `subnet` subsection
+
+```yaml
+- mask: 1.2.3.4/24
+  source_ips:
+    - 1.2.3.4
+    - 1.2.3.5
+```
+
+| Parameter    | Type       | SIGHUP reload | Default value | Description                                                          |
+|--------------|------------|---------------|---------------|----------------------------------------------------------------------|
+| `mask`       | `string`   | yes           |               | Destination subnet.                                                  |
+| `source_ips` | `[]string` | yes           |               | Array of source IP addresses to use when dialing destination subnet. |
--- a/go.mod
+++ b/go.mod
@ -3,9 +3,10 @@ module git.frostfs.info/TrueCloudLab/frostfs-http-gw
 go 1.22

 require (
-	git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20240916093537-13fa0da3741e
+	git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20241011114054-f0fc40e116d1
 	git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20240909114314-666d326cc573
-	git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20240918095938-e580ee991d98
+	git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20241022124111-5361f0ecebd3
+	git.frostfs.info/TrueCloudLab/multinet v0.0.0-20241015075604-6cb0d80e0972
 	git.frostfs.info/TrueCloudLab/zapjournald v0.0.0-20240124114243-cb2e66427d02
 	github.com/bluele/gcache v0.0.2
 	github.com/docker/go-units v0.4.0
@ -23,8 +24,9 @@ require (
 	go.opentelemetry.io/otel v1.28.0
 	go.opentelemetry.io/otel/trace v1.28.0
 	go.uber.org/zap v1.27.0
-	golang.org/x/exp v0.0.0-20240222234643-814bf88cf225
+	golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842
 	golang.org/x/net v0.26.0
+	golang.org/x/sys v0.22.0
 	google.golang.org/grpc v1.66.2
 )

@ -39,7 +41,7 @@ require (
 	github.com/Microsoft/hcsshim v0.9.2 // indirect
 	github.com/VictoriaMetrics/easyproto v0.1.4 // indirect
 	github.com/andybalholm/brotli v1.0.4 // indirect
-	github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
+	github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
@ -106,7 +108,6 @@ require (
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/crypto v0.24.0 // indirect
 	golang.org/x/sync v0.7.0 // indirect
-	golang.org/x/sys v0.22.0 // indirect
 	golang.org/x/term v0.21.0 // indirect
 	golang.org/x/text v0.16.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
--- a/go.sum
+++ b/go.sum
@ -37,18 +37,20 @@ cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RX
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
 cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3fOKtUw0Xmo=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20240916093537-13fa0da3741e h1:740ABnOBYx4o6jxULHdSSnVW2fYIO35ohg+Uz59sxd0=
-git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20240916093537-13fa0da3741e/go.mod h1:F5GS7hRb62PUy5sTYDC4ajVdeffoAfjHSSHTKUJEaYU=
+git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20241011114054-f0fc40e116d1 h1:ivcdxQeQDnx4srF2ezoaeVlF0FAycSAztwfIUJnUI4s=
+git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20241011114054-f0fc40e116d1/go.mod h1:F5GS7hRb62PUy5sTYDC4ajVdeffoAfjHSSHTKUJEaYU=
 git.frostfs.info/TrueCloudLab/frostfs-contract v0.19.3-0.20240621131249-49e5270f673e h1:kcBqZBiFIUBATUqEuvVigtkJJWQ2Gug/eYXn967o3M4=
 git.frostfs.info/TrueCloudLab/frostfs-contract v0.19.3-0.20240621131249-49e5270f673e/go.mod h1:F/fe1OoIDKr5Bz99q4sriuHDuf3aZefZy9ZsCqEtgxc=
 git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0 h1:FxqFDhQYYgpe41qsIHVOcdzSVCB8JNSfPG7Uk4r2oSk=
 git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0/go.mod h1:RUIKZATQLJ+TaYQa60X2fTDwfuhMfm8Ar60bQ5fr+vU=
 git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20240909114314-666d326cc573 h1:6qCcm1oqFbmf9C5AauXzrL5OPGnTbI9HoB/jAtD9274=
 git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20240909114314-666d326cc573/go.mod h1:kbwB4v2o6RyOfCo9kEFeUDZIX3LKhmS0yXPrtvzkQ1g=
-git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20240918095938-e580ee991d98 h1:ijUci3thz0EwWkuRJDocW5D1RkVAJlt9xNG4CYepC90=
-git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20240918095938-e580ee991d98/go.mod h1:GeNpo12HcEW4J412sH5yf8xFYapxlrt5fcYzRwg0Ino=
+git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20241022124111-5361f0ecebd3 h1:f7jan6eBDN88DKnKj8GKyWpfjBbSzjDALcDejYKRgCs=
+git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20241022124111-5361f0ecebd3/go.mod h1:3txOjFJ8M/JFs01h7xOrnQHVn6hZgDNA16ivyUlu1iU=
 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=
+git.frostfs.info/TrueCloudLab/multinet v0.0.0-20241015075604-6cb0d80e0972/go.mod h1:2hM42MBrlhvN6XToaW6OWNk5ZLcu1FhaukGgxtfpDDI=
 git.frostfs.info/TrueCloudLab/rfc6979 v0.4.0 h1:M2KR3iBj7WpY3hP10IevfIB9MURr4O9mwVfJ+SjT3HA=
 git.frostfs.info/TrueCloudLab/rfc6979 v0.4.0/go.mod h1:okpbKfVYf/BpejtfFTfhZqFP+sZ8rsHrP8Rr/jYPNRc=
 git.frostfs.info/TrueCloudLab/tzhash v1.8.0 h1:UFMnUIk0Zh17m8rjGHJMqku2hCgaXDqjqZzS4gsb4UA=
@ -112,8 +114,8 @@ github.com/andybalholm/brotli v1.0.2/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu
 github.com/andybalholm/brotli v1.0.4 h1:V7DdXeJtZscaqfNuAdSRuRFzuiKlHSC/Zh3zl9qY3JY=
 github.com/andybalholm/brotli v1.0.4/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/antlr4-go/antlr/v4 v4.13.0 h1:lxCg3LAv+EUK6t1i0y1V6/SLeUi0eKEKdhQAlS8TVTI=
-github.com/antlr4-go/antlr/v4 v4.13.0/go.mod h1:pfChB/xh/Unjila75QW7+VU4TSnWnnk9UTnmpPaOR2g=
+github.com/antlr4-go/antlr/v4 v4.13.1 h1:SqQKkuVZ+zWkMMNkjy5FZe5mr5WURWnlpmOuzYWrPrQ=
+github.com/antlr4-go/antlr/v4 v4.13.1/go.mod h1:GKmUxMtwp6ZgGwZSva4eWPC5mS6vUAmOABFgjdkM7Nw=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/aws/aws-sdk-go v1.15.11/go.mod h1:mFuSZ37Z9YOHbQEwBWztmVzqXrEkub65tZoCYDt7FT0=
@ -926,8 +928,8 @@ golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u0
 golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
 golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
-golang.org/x/exp v0.0.0-20240222234643-814bf88cf225 h1:LfspQV/FYTatPTr/3HzIcmiUFH7PGP+OQ6mgDYo3yuQ=
-golang.org/x/exp v0.0.0-20240222234643-814bf88cf225/go.mod h1:CxmFvTBINI24O/j8iY7H1xHzx2i4OsyguNBmN/uPtqc=
+golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842 h1:vr/HnozRka3pE4EsMEg1lgkXJkTFJCVUX+S/ZT6wYzM=
+golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842/go.mod h1:XtvwrStGgqGPLc4cjQfWqZHG1YFdYs6swckp8vpsjnc=
 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
 golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
--- a/internal/logs/logs.go
+++ b/internal/logs/logs.go
@ -79,4 +79,8 @@ const (
 	ServerReconnectedSuccessfully                                         = "server reconnected successfully"
 	ServerReconnectFailed                                                 = "failed to reconnect server"
 	WarnDuplicateAddress                                                  = "duplicate address"
+	MultinetDialSuccess                                                   = "multinet dial successful"
+	MultinetDialFail                                                      = "multinet dial failed"
+	FailedToLoadMultinetConfig                                            = "failed to load multinet config"
+	MultinetConfigWontBeUpdated                                           = "multinet config won't be updated"
 )
--- a/internal/net/config.go
+++ b/internal/net/config.go
@ -0,0 +1,68 @@
+package net
+
+import (
+	"errors"
+	"fmt"
+	"net/netip"
+	"slices"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/multinet"
+)
+
+var errEmptySourceIPList = errors.New("empty source IP list")
+
+type Subnet struct {
+	Prefix    string
+	SourceIPs []string
+}
+
+type Config struct {
+	Enabled       bool
+	Subnets       []Subnet
+	Balancer      string
+	Restrict      bool
+	FallbackDelay time.Duration
+	EventHandler  multinet.EventHandler
+}
+
+func (c Config) toMultinetConfig() (multinet.Config, error) {
+	var subnets []multinet.Subnet
+	for _, s := range c.Subnets {
+		var ms multinet.Subnet
+		p, err := netip.ParsePrefix(s.Prefix)
+		if err != nil {
+			return multinet.Config{}, fmt.Errorf("parse IP prefix '%s': %w", s.Prefix, err)
+		}
+		ms.Prefix = p
+		for _, ip := range s.SourceIPs {
+			addr, err := netip.ParseAddr(ip)
+			if err != nil {
+				return multinet.Config{}, fmt.Errorf("parse IP address '%s': %w", ip, err)
+			}
+			ms.SourceIPs = append(ms.SourceIPs, addr)
+		}
+		if len(ms.SourceIPs) == 0 {
+			return multinet.Config{}, errEmptySourceIPList
+		}
+		subnets = append(subnets, ms)
+	}
+	return multinet.Config{
+		Subnets:       subnets,
+		Balancer:      multinet.BalancerType(c.Balancer),
+		Restrict:      c.Restrict,
+		FallbackDelay: c.FallbackDelay,
+		Dialer:        newDefaultDialer(),
+		EventHandler:  c.EventHandler,
+	}, nil
+}
+
+func (c Config) equals(other Config) bool {
+	return c.Enabled == other.Enabled &&
+		slices.EqualFunc(c.Subnets, other.Subnets, func(lhs, rhs Subnet) bool {
+			return lhs.Prefix == rhs.Prefix && slices.Equal(lhs.SourceIPs, rhs.SourceIPs)
+		}) &&
+		c.Balancer == other.Balancer &&
+		c.Restrict == other.Restrict &&
+		c.FallbackDelay == other.FallbackDelay
+}
--- a/internal/net/dial_target.go
+++ b/internal/net/dial_target.go
@ -0,0 +1,54 @@
+// NOTE: code is taken from https://github.com/grpc/grpc-go/blob/v1.68.x/internal/transport/http_util.go
+
+/*
+ *
+ * Copyright 2014 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package net
+
+import (
+	"net/url"
+	"strings"
+)
+
+// parseDialTarget returns the network and address to pass to dialer.
+func parseDialTarget(target string) (string, string) {
+	net := "tcp"
+	m1 := strings.Index(target, ":")
+	m2 := strings.Index(target, ":/")
+	// handle unix:addr which will fail with url.Parse
+	if m1 >= 0 && m2 < 0 {
+		if n := target[0:m1]; n == "unix" {
+			return n, target[m1+1:]
+		}
+	}
+	if m2 >= 0 {
+		t, err := url.Parse(target)
+		if err != nil {
+			return net, target
+		}
+		scheme := t.Scheme
+		addr := t.Path
+		if scheme == "unix" {
+			if addr == "" {
+				addr = t.Host
+			}
+			return scheme, addr
+		}
+	}
+	return net, target
+}
--- a/internal/net/dialer.go
+++ b/internal/net/dialer.go
@ -0,0 +1,36 @@
+package net
+
+import (
+	"net"
+	"syscall"
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+func newDefaultDialer() net.Dialer {
+	// From `grpc.WithContextDialer` comment:
+	//
+	// Note: All supported releases of Go (as of December 2023) override the OS
+	// defaults for TCP keepalive time and interval to 15s. To enable TCP keepalive
+	// with OS defaults for keepalive time and interval, use a net.Dialer that sets
+	// the KeepAlive field to a negative value, and sets the SO_KEEPALIVE socket
+	// option to true from the Control field. For a concrete example of how to do
+	// this, see internal.NetDialerWithTCPKeepalive().
+	//
+	// https://github.com/grpc/grpc-go/blob/830135e6c5a351abf75f0c9cfdf978e5df8daeba/dialoptions.go#L432
+	//
+	// From `internal.NetDialerWithTCPKeepalive` comment:
+	//
+	// TODO: Once https://github.com/golang/go/issues/62254 lands, and the
+	// appropriate Go version becomes less than our least supported Go version, we
+	// should look into using the new API to make things more straightforward.
+	return net.Dialer{
+		KeepAlive: time.Duration(-1),
+		Control: func(_, _ string, c syscall.RawConn) error {
+			return c.Control(func(fd uintptr) {
+				_ = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_KEEPALIVE, 1)
+			})
+		},
+	}
+}
--- a/internal/net/dialer_source.go
+++ b/internal/net/dialer_source.go
@ -0,0 +1,69 @@
+package net
+
+import (
+	"context"
+	"net"
+	"sync"
+
+	"git.frostfs.info/TrueCloudLab/multinet"
+)
+
+type DialerSource struct {
+	guard sync.RWMutex
+
+	c Config
+
+	md multinet.Dialer
+}
+
+func NewDialerSource(c Config) (*DialerSource, error) {
+	result := &DialerSource{}
+	if err := result.build(c); err != nil {
+		return nil, err
+	}
+	return result, nil
+}
+
+func (s *DialerSource) build(c Config) error {
+	if c.Enabled {
+		mc, err := c.toMultinetConfig()
+		if err != nil {
+			return err
+		}
+		md, err := multinet.NewDialer(mc)
+		if err != nil {
+			return err
+		}
+		s.md = md
+		s.c = c
+		return nil
+	}
+	s.md = nil
+	s.c = c
+	return nil
+}
+
+// GrpcContextDialer returns grpc.WithContextDialer func.
+// Returns nil if multinet disabled.
+func (s *DialerSource) GrpcContextDialer() func(context.Context, string) (net.Conn, error) {
+	s.guard.RLock()
+	defer s.guard.RUnlock()
+
+	if s.c.Enabled {
+		return func(ctx context.Context, address string) (net.Conn, error) {
+			network, address := parseDialTarget(address)
+			return s.md.DialContext(ctx, network, address)
+		}
+	}
+	return nil
+}
+
+func (s *DialerSource) Update(c Config) error {
+	s.guard.Lock()
+	defer s.guard.Unlock()
+
+	if s.c.equals(c) {
+		return nil
+	}
+	return s.build(c)
+}
--- a/internal/net/event_handler.go
+++ b/internal/net/event_handler.go
@ -0,0 +1,28 @@
+package net
+
+import (
+	"net"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	"go.uber.org/zap"
+)
+
+type LogEventHandler struct {
+	logger *zap.Logger
+}
+
+func (l LogEventHandler) DialPerformed(sourceIP net.Addr, _, address string, err error) {
+	sourceIPString := "undefined"
+	if sourceIP != nil {
+		sourceIPString = sourceIP.Network() + "://" + sourceIP.String()
+	}
+	if err == nil {
+		l.logger.Debug(logs.MultinetDialSuccess, zap.String("source", sourceIPString), zap.String("destination", address))
+	} else {
+		l.logger.Debug(logs.MultinetDialFail, zap.String("source", sourceIPString), zap.String("destination", address), zap.Error(err))
+	}
+}
+
+func NewLogEventHandler(logger *zap.Logger) LogEventHandler {
+	return LogEventHandler{logger: logger}
+}
Author	SHA1	Message	Date
Denis Kirillov	82546f9fc6	[#XX] Update SDK Need fix TrueCloudLab/frostfs-sdk-go#282 Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>	2024-11-05 17:50:50 +03:00
Alex Vanin	821f8c2248	[#160 ] Add documentation for multinet settings Signed-off-by: Alex Vanin <a.vanin@yadro.com>	2024-10-31 11:38:54 +03:00
Alex Vanin	8bc64ce5e9	[#160 ] Use source dialer for gRPC connection to storage Signed-off-by: Alex Vanin <a.vanin@yadro.com>	2024-10-31 11:38:49 +03:00
Alex Vanin	69b7761bd6	[#160 ] Add internal/net package with multinet dialer source Signed-off-by: Alex Vanin <a.vanin@yadro.com>	2024-10-31 11:38:41 +03:00
Denis Kirillov	46c63edd67	[#158 ] Support cors Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>	2024-10-25 09:31:59 +03:00
Denis Kirillov	901b8ff95b	[#158 ] Fix integration test compilation error Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>	2024-10-25 09:30:58 +03:00
Denis Kirillov	8dc5272965	[#158 ] Rework app settings Update settings by sighup using one lock/unlock operation Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>	2024-10-25 09:30:53 +03:00
Roman Loginov	70846fdaec	[#157 ] Support the continuous use of interceptors We can always add interceptors to the grpc connection to the storage, since the actual use will be controlled by the configuration from the frostfs-observability library. Signed-off-by: Roman Loginov <r.loginov@yadro.com>	2024-10-22 14:24:26 +00:00