cmd/frostfs-ir/defaults.go

@@ -48,6 +48,8 @@ func defaultConfiguration(cfg *viper.Viper) {
 	cfg.SetDefault("node.kludge_compatibility_mode", false)
 
 	cfg.SetDefault("audit.enabled", false)
+
+	setMultinetDefaults(cfg)
 }
 
 func setControlDefaults(cfg *viper.Viper) {
@@ -131,3 +133,11 @@ func setMorphDefaults(cfg *viper.Viper) {
 	cfg.SetDefault("morph.validators", []string{})
 	cfg.SetDefault("morph.switch_interval", 2*time.Minute)
 }
+
+func setMultinetDefaults(cfg *viper.Viper) {
+	cfg.SetDefault("multinet.enabled", false)
+	cfg.SetDefault("multinet.balancer", "")
+	cfg.SetDefault("multinet.restrict", false)
+	cfg.SetDefault("multinet.fallback_delay", "0s")
+	cfg.SetDefault("multinet.subnets", "")
+}

cmd/frostfs-node/config.go

@@ -26,12 +26,14 @@ import (
 	fstreeconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/engine/shard/blobstor/fstree"
 	loggerconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/logger"
 	morphconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/morph"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/multinet"
 	nodeconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/node"
 	objectconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/object"
 	replicatorconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/replicator"
 	tracingconfig "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/tracing"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/metrics"
+	internalNet "git.frostfs.info/TrueCloudLab/frostfs-node/internal/net"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/ape/chainbase"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
 	frostfsidcore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/frostfsid"
@@ -436,6 +438,8 @@ type shared struct {
 	metricsCollector *metrics.NodeMetrics
 
 	metricsSvc *objectService.MetricCollector
+
+	dialerSource *internalNet.DialerSource
 }
 
 // dynamicConfiguration stores parameters of the
@@ -760,12 +764,18 @@ func initShared(appCfg *config.Config, key *keys.PrivateKey, netState *networkSt
 	persistate, err := state.NewPersistentStorage(nodeconfig.PersistentState(appCfg).Path())
 	fatalOnErr(err)
 
+	nodeMetrics := metrics.NewNodeMetrics()
+
+	ds, err := internalNet.NewDialerSource(internalNetConfig(appCfg, nodeMetrics.MultinetMetrics()))
+	fatalOnErr(err)
+
 	cacheOpts := cache.ClientCacheOpts{
 		DialTimeout:      apiclientconfig.DialTimeout(appCfg),
 		StreamTimeout:    apiclientconfig.StreamTimeout(appCfg),
 		Key:              &key.PrivateKey,
 		AllowExternal:    apiclientconfig.AllowExternal(appCfg),
 		ReconnectTimeout: apiclientconfig.ReconnectTimeout(appCfg),
+		DialerSource:     ds,
 	}
 
 	return shared{
@@ -777,10 +787,29 @@ func initShared(appCfg *config.Config, key *keys.PrivateKey, netState *networkSt
 		bgClientCache:    cache.NewSDKClientCache(cacheOpts),
 		putClientCache:   cache.NewSDKClientCache(cacheOpts),
 		persistate:       persistate,
-		metricsCollector: metrics.NewNodeMetrics(),
+		metricsCollector: nodeMetrics,
+		dialerSource:     ds,
 	}
 }
 
+func internalNetConfig(appCfg *config.Config, m metrics.MultinetMetrics) internalNet.Config {
+	result := internalNet.Config{
+		Enabled:       multinet.Enabled(appCfg),
+		Balancer:      multinet.Balancer(appCfg),
+		Restrict:      multinet.Restrict(appCfg),
+		FallbackDelay: multinet.FallbackDelay(appCfg),
+		Metrics:       m,
+	}
+	sn := multinet.Subnets(appCfg)
+	for _, s := range sn {
+		result.Subnets = append(result.Subnets, internalNet.Subnet{
+			Prefix:    s.Mask,
+			SourceIPs: s.SourceIPs,
+		})
+	}
+	return result
+}
+
 func initNetmap(appCfg *config.Config, netState *networkState, relayOnly bool) cfgNetmap {
 	netmapWorkerPool, err := ants.NewPool(notificationHandlerPoolSize)
 	fatalOnErr(err)
@@ -1336,6 +1365,11 @@ func (c *cfg) reloadConfig(ctx context.Context) {
 		}
 	}
 
+	if err := c.dialerSource.Update(internalNetConfig(c.appCfg, c.metricsCollector.MultinetMetrics())); err != nil {
+		c.log.Error(logs.FailedToUpdateMultinetConfiguration, zap.Error(err))
+		return
+	}
+
 	c.log.Info(logs.FrostFSNodeConfigurationHasBeenReloadedSuccessfully)
 }
 

cmd/frostfs-node/config/multinet/config.go

@@ -0,0 +1,62 @@
+package multinet
+
+import (
+	"strconv"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config"
+)
+
+const (
+	subsection = "multinet"
+
+	FallbackDelayDefault = 300 * time.Millisecond
+)
+
+// Enabled returns the  value of "enabled" config parameter from "multinet" section.
+func Enabled(c *config.Config) bool {
+	return config.BoolSafe(c.Sub(subsection), "enabled")
+}
+
+type Subnet struct {
+	Mask      string
+	SourceIPs []string
+}
+
+// Subnets returns the  value of "subnets" config parameter from "multinet" section.
+func Subnets(c *config.Config) []Subnet {
+	var result []Subnet
+	sub := c.Sub(subsection).Sub("subnets")
+	for i := 0; ; i++ {
+		s := sub.Sub(strconv.FormatInt(int64(i), 10))
+		mask := config.StringSafe(s, "mask")
+		if mask == "" {
+			break
+		}
+		sourceIPs := config.StringSliceSafe(s, "source_ips")
+		result = append(result, Subnet{
+			Mask:      mask,
+			SourceIPs: sourceIPs,
+		})
+	}
+	return result
+}
+
+// Balancer returns the  value of "balancer" config parameter from "multinet" section.
+func Balancer(c *config.Config) string {
+	return config.StringSafe(c.Sub(subsection), "balancer")
+}
+
+// Restrict returns the  value of "restrict" config parameter from "multinet" section.
+func Restrict(c *config.Config) bool {
+	return config.BoolSafe(c.Sub(subsection), "restrict")
+}
+
+// FallbackDelay returns the  value of "fallback_delay" config parameter from "multinet" section.
+func FallbackDelay(c *config.Config) time.Duration {
+	fd := config.DurationSafe(c.Sub(subsection), "fallback_delay")
+	if fd != 0 { // negative value means no fallback
+		return fd
+	}
+	return FallbackDelayDefault
+}

cmd/frostfs-node/config/multinet/config_test.go

@@ -0,0 +1,52 @@
+package multinet
+
+import (
+	"testing"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config"
+	configtest "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-node/config/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestMultinetSection(t *testing.T) {
+	t.Run("defaults", func(t *testing.T) {
+		empty := configtest.EmptyConfig()
+		require.Equal(t, false, Enabled(empty))
+		require.Equal(t, ([]Subnet)(nil), Subnets(empty))
+		require.Equal(t, "", Balancer(empty))
+		require.Equal(t, false, Restrict(empty))
+		require.Equal(t, FallbackDelayDefault, FallbackDelay(empty))
+	})
+
+	const path = "../../../../config/example/node"
+
+	fileConfigTest := func(c *config.Config) {
+		require.Equal(t, true, Enabled(c))
+		require.Equal(t, []Subnet{
+			{
+				Mask: "192.168.219.174/24",
+				SourceIPs: []string{
+					"192.168.218.185",
+					"192.168.219.185",
+				},
+			},
+			{
+				Mask: "10.78.70.74/24",
+				SourceIPs: []string{
+					"10.78.70.185",
+					"10.78.71.185",
+				},
+			},
+		}, Subnets(c))
+		require.Equal(t, "roundrobin", Balancer(c))
+		require.Equal(t, false, Restrict(c))
+		require.Equal(t, 350*time.Millisecond, FallbackDelay(c))
+	}
+
+	configtest.ForEachFileType(path, fileConfigTest)
+
+	t.Run("ENV", func(t *testing.T) {
+		configtest.ForEnvFileType(t, path, fileConfigTest)
+	})
+}

cmd/frostfs-node/morph.go

@@ -29,51 +29,12 @@ const (
 )
 
 func initMorphComponents(ctx context.Context, c *cfg) {
-	addresses := morphconfig.RPCEndpoint(c.appCfg)
+	initMorphClient(ctx, c)
-
-	// Morph client stable-sorts endpoints by priority. Shuffle here to randomize
-	// order of endpoints with the same priority.
-	rand.Shuffle(len(addresses), func(i, j int) {
-		addresses[i], addresses[j] = addresses[j], addresses[i]
-	})
-
-	cli, err := client.New(ctx,
-		c.key,
-		client.WithDialTimeout(morphconfig.DialTimeout(c.appCfg)),
-		client.WithLogger(c.log),
-		client.WithMetrics(c.metricsCollector.MorphClientMetrics()),
-		client.WithEndpoints(addresses...),
-		client.WithConnLostCallback(func() {
-			c.internalErr <- errors.New("morph connection has been lost")
-		}),
-		client.WithSwitchInterval(morphconfig.SwitchInterval(c.appCfg)),
-		client.WithMorphCacheMetrics(c.metricsCollector.MorphCacheMetrics()),
-	)
-	if err != nil {
-		c.log.Info(logs.FrostFSNodeFailedToCreateNeoRPCClient,
-			zap.Any("endpoints", addresses),
-			zap.String("error", err.Error()),
-		)
-
-		fatalOnErr(err)
-	}
-
-	c.onShutdown(func() {
-		c.log.Info(logs.FrostFSNodeClosingMorphComponents)
-		cli.Close()
-	})
-
-	if err := cli.SetGroupSignerScope(); err != nil {
-		c.log.Info(logs.FrostFSNodeFailedToSetGroupSignerScopeContinueWithGlobal, zap.Error(err))
-	}
-
-	c.cfgMorph.client = cli
-	c.cfgMorph.notaryEnabled = cli.ProbeNotary()
 
 	lookupScriptHashesInNNS(c) // smart contract auto negotiation
 
 	if c.cfgMorph.notaryEnabled {
-		err = c.cfgMorph.client.EnableNotarySupport(
+		err := c.cfgMorph.client.EnableNotarySupport(
 			client.WithProxyContract(
 				c.cfgMorph.proxyScriptHash,
 			),
@@ -111,6 +72,50 @@ func initMorphComponents(ctx context.Context, c *cfg) {
 	c.cfgNetmap.wrapper = wrap
 }
 
+func initMorphClient(ctx context.Context, c *cfg) {
+	addresses := morphconfig.RPCEndpoint(c.appCfg)
+
+	// Morph client stable-sorts endpoints by priority. Shuffle here to randomize
+	// order of endpoints with the same priority.
+	rand.Shuffle(len(addresses), func(i, j int) {
+		addresses[i], addresses[j] = addresses[j], addresses[i]
+	})
+
+	cli, err := client.New(ctx,
+		c.key,
+		client.WithDialTimeout(morphconfig.DialTimeout(c.appCfg)),
+		client.WithLogger(c.log),
+		client.WithMetrics(c.metricsCollector.MorphClientMetrics()),
+		client.WithEndpoints(addresses...),
+		client.WithConnLostCallback(func() {
+			c.internalErr <- errors.New("morph connection has been lost")
+		}),
+		client.WithSwitchInterval(morphconfig.SwitchInterval(c.appCfg)),
+		client.WithMorphCacheMetrics(c.metricsCollector.MorphCacheMetrics()),
+		client.WithDialerSource(c.dialerSource),
+	)
+	if err != nil {
+		c.log.Info(logs.FrostFSNodeFailedToCreateNeoRPCClient,
+			zap.Any("endpoints", addresses),
+			zap.String("error", err.Error()),
+		)
+
+		fatalOnErr(err)
+	}
+
+	c.onShutdown(func() {
+		c.log.Info(logs.FrostFSNodeClosingMorphComponents)
+		cli.Close()
+	})
+
+	if err := cli.SetGroupSignerScope(); err != nil {
+		c.log.Info(logs.FrostFSNodeFailedToSetGroupSignerScopeContinueWithGlobal, zap.Error(err))
+	}
+
+	c.cfgMorph.client = cli
+	c.cfgMorph.notaryEnabled = cli.ProbeNotary()
+}
+
 func makeAndWaitNotaryDeposit(ctx context.Context, c *cfg) {
 	// skip notary deposit in non-notary environments
 	if !c.cfgMorph.notaryEnabled {

cmd/frostfs-node/tree.go

@@ -67,6 +67,7 @@ func initTreeService(c *cfg) {
 		tree.WithAPELocalOverrideStorage(c.cfgObject.cfgAccessPolicyEngine.accessPolicyEngine.LocalStorage()),
 		tree.WithAPEMorphRuleStorage(c.cfgObject.cfgAccessPolicyEngine.accessPolicyEngine.MorphRuleChainStorage()),
 		tree.WithNetmapState(c.cfgNetmap.state),
+		tree.WithDialerSource(c.dialerSource),
 	)
 
 	c.cfgGRPC.performAndSave(func(_ string, _ net.Listener, s *grpc.Server) {

config/example/ir.env

@@ -80,3 +80,12 @@ FROSTFS_IR_PPROF_MUTEX_RATE=10000
 FROSTFS_IR_PROMETHEUS_ENABLED=true
 FROSTFS_IR_PROMETHEUS_ADDRESS=localhost:9090
 FROSTFS_IR_PROMETHEUS_SHUTDOWN_TIMEOUT=30s
+
+FROSTFS_MULTINET_ENABLED=true
+FROSTFS_MULTINET_SUBNETS_0_MASK="192.168.219.174/24"
+FROSTFS_MULTINET_SUBNETS_0_SOURCE_IPS="192.168.218.185 192.168.219.185"
+FROSTFS_MULTINET_SUBNETS_1_MASK="10.78.70.74/24"
+FROSTFS_MULTINET_SUBNETS_1_SOURCE_IPS="10.78.70.185 10.78.71.185"
+FROSTFS_MULTINET_BALANCER=roundrobin
+FROSTFS_MULTINET_RESTRICT=false
+FROSTFS_MULTINET_FALLBACK_DELAY=350ms

config/example/ir.yaml

@@ -123,3 +123,18 @@ prometheus:
 
 systemdnotify:
   enabled: true
+
+multinet:
+  enabled: true
+  subnets:
+    - mask: 192.168.219.174/24
+      source_ips:
+        - 192.168.218.185
+        - 192.168.219.185
+    - mask: 10.78.70.74/24
+      source_ips:
+        - 10.78.70.185
+        - 10.78.71.185
+  balancer: roundrobin
+  restrict: false
+  fallback_delay: 350ms

config/example/node.env

@@ -206,3 +206,13 @@ FROSTFS_RUNTIME_SOFT_MEMORY_LIMIT=1073741824
 
 # AUDIT section
 FROSTFS_AUDIT_ENABLED=true
+
+# MULTINET section
+FROSTFS_MULTINET_ENABLED=true
+FROSTFS_MULTINET_SUBNETS_0_MASK="192.168.219.174/24"
+FROSTFS_MULTINET_SUBNETS_0_SOURCE_IPS="192.168.218.185 192.168.219.185"
+FROSTFS_MULTINET_SUBNETS_1_MASK="10.78.70.74/24"
+FROSTFS_MULTINET_SUBNETS_1_SOURCE_IPS="10.78.70.185 10.78.71.185"
+FROSTFS_MULTINET_BALANCER=roundrobin
+FROSTFS_MULTINET_RESTRICT=false
+FROSTFS_MULTINET_FALLBACK_DELAY=350ms

config/example/node.json

@@ -264,5 +264,27 @@
   },
   "audit": {
     "enabled": true
+  },
+  "multinet": {
+    "enabled": true,
+    "subnets": [
+      {
+        "mask": "192.168.219.174/24",
+        "source_ips": [
+          "192.168.218.185",
+          "192.168.219.185"
+        ]
+      },
+      {
+        "mask": "10.78.70.74/24",
+        "source_ips":[
+          "10.78.70.185",
+          "10.78.71.185"
+        ]
+      }
+    ],
+    "balancer": "roundrobin",
+    "restrict": false,
+    "fallback_delay": "350ms"
   }
 }

config/example/node.yaml

@@ -240,3 +240,18 @@ runtime:
 
 audit:
   enabled: true
+
+multinet:
+  enabled: true
+  subnets:
+    - mask: 192.168.219.174/24
+      source_ips:
+        - 192.168.218.185
+        - 192.168.219.185
+    - mask: 10.78.70.74/24
+      source_ips:
+        - 10.78.70.185
+        - 10.78.71.185
+  balancer: roundrobin
+  restrict: false
+  fallback_delay: 350ms

docs/storage-node-configuration.md

@@ -25,8 +25,8 @@ There are some custom types used for brevity:
 | `replicator`           | [Replicator service configuration](#replicator-section)             |
 | `storage`              | [Storage engine configuration](#storage-section)                    |
 | `runtime`              | [Runtime configuration](#runtime-section)                           |
-| `audit`                | [Audit configuration](#audit-section)                           |
+| `audit`                | [Audit configuration](#audit-section)                               |
-
+| `multinet`             | [Multinet configuration](#multinet-section)                            |
 
 # `control` section
 ```yaml
@@ -435,6 +435,35 @@ audit:
   enabled: true
 ```
 
-| Parameter           | Type   | Default value | Description                                       |
+| Parameter | Type   | Default value | Description                                       |
-|---------------------|--------|---------------|---------------------------------------------------|
+|-----------|--------|---------------|---------------------------------------------------|
-| `soft_memory_limit` | `bool` | false         | If `true` then audit event logs will be recorded. |
+| `enabled` | `bool` | false         | If `true` then audit event logs will be recorded. |
+
+
+# `multinet` section
+Contains multinet parameters.
+
+```yaml
+multinet:
+  enabled: true
+  subnets:
+    - mask: 192.168.219.174/24
+      source_ips:
+        - 192.168.218.185
+        - 192.168.219.185
+    - mask: 10.78.70.74/24
+      source_ips:
+        - 10.78.70.185
+        - 10.78.71.185
+  balancer: roundrobin
+  restrict: false
+  fallback_delay: 350ms
+```
+
+| Parameter        | Type       | Default value | Description                                                                                                                |
+| ---------------- | ---------- | ------------- | -------------------------------------------------------------------------------------------------------------------------- |
+| `enabled`        | `bool`     | false         | If `true` then source-based routing is enabled.                                                                            |
+| `subnets`        | `subnet`   | empty         | Resulting subnets.                                                                                                         |
+| `balancer`       | `string`   | ""            | Balancer to select network interfaces, allowed values are "" (no balancing, use first suitable interface) or "roundrobin". |
+| `restrict`       | `bool`     | false         | If `true` then any requests that do not match `subnets` will fail.                                                         |
+| `fallback_delay` | `duration` | 350ms         | Delay before fallback to secondary IP addresses in case of hostname resolve.                                               |

go.mod

@@ -11,6 +11,7 @@ require (
 	git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20240909114314-666d326cc573
 	git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20241010110344-99c5c5836509
 	git.frostfs.info/TrueCloudLab/hrw v1.2.1
+	git.frostfs.info/TrueCloudLab/multinet v0.0.0-20241015075604-6cb0d80e0972
 	git.frostfs.info/TrueCloudLab/policy-engine v0.0.0-20240814080254-96225afacb88
 	git.frostfs.info/TrueCloudLab/tzhash v1.8.0
 	git.frostfs.info/TrueCloudLab/zapjournald v0.0.0-20240124114243-cb2e66427d02
@@ -132,4 +133,4 @@ require (
 	rsc.io/tmplfunc v0.0.3 // indirect
 )
 
-replace github.com/nspcc-dev/neo-go => git.frostfs.info/TrueCloudLab/neoneo-go v0.106.1-0.20240726093631-5481339d6928
+replace github.com/nspcc-dev/neo-go => git.frostfs.info/TrueCloudLab/neoneo-go v0.106.1-0.20241015133823-8aee80dbdc07

internal/logs/logs.go

@@ -523,4 +523,5 @@ const (
 	WritecacheShrinkSkippedNotEmpty                                      = "writecache shrink skipped: not empty"
 	BlobovniczatreeFailedToRemoveRebuildTempFile                         = "failed to remove rebuild temp file"
 	WritecacheCantGetObject                                              = "can't get an object from fstree"
+	FailedToUpdateMultinetConfiguration                                  = "failed to update multinet configuration"
 )

internal/metrics/consts.go

@@ -22,6 +22,7 @@ const (
 	grpcServerSubsystem      = "grpc_server"
 	policerSubsystem         = "policer"
 	commonCacheSubsystem     = "common_cache"
+	multinetSubsystem        = "multinet"
 
 	successLabel          = "success"
 	shardIDLabel          = "shard_id"
@@ -41,6 +42,7 @@ const (
 	endpointLabel         = "endpoint"
 	hitLabel              = "hit"
 	cacheLabel            = "cache"
+	sourceIPLabel         = "source_ip"
 
 	readWriteMode = "READ_WRITE"
 	readOnlyMode  = "READ_ONLY"

internal/metrics/innerring.go

@@ -17,6 +17,7 @@ type InnerRingServiceMetrics struct {
 	eventDuration     *prometheus.HistogramVec
 	morphCacheMetrics *morphCacheMetrics
 	logMetrics        logger.LogMetrics
+	multinet          *multinetMetrics
 	// nolint: unused
 	appInfo *ApplicationInfo
 }
@@ -51,6 +52,7 @@ func NewInnerRingMetrics() *InnerRingServiceMetrics {
 		morphCacheMetrics: newMorphCacheMetrics(innerRingNamespace),
 		appInfo:           NewApplicationInfo(misc.Version),
 		logMetrics:        logger.NewLogMetrics(innerRingNamespace),
+		multinet:          newMultinetMetrics(innerRingNamespace),
 	}
 }
 
@@ -78,3 +80,7 @@ func (m *InnerRingServiceMetrics) MorphCacheMetrics() MorphCacheMetrics {
 func (m *InnerRingServiceMetrics) LogMetrics() logger.LogMetrics {
 	return m.logMetrics
 }
+
+func (m *InnerRingServiceMetrics) Multinet() MultinetMetrics {
+	return m.multinet
+}

internal/metrics/multinet.go

@@ -0,0 +1,35 @@
+package metrics
+
+import (
+	"strconv"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-observability/metrics"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type multinetMetrics struct {
+	dials *prometheus.GaugeVec
+}
+
+type MultinetMetrics interface {
+	Dial(sourceIP string, success bool)
+}
+
+func newMultinetMetrics(ns string) *multinetMetrics {
+	return &multinetMetrics{
+		dials: metrics.NewGaugeVec(
+			prometheus.GaugeOpts{
+				Namespace: ns,
+				Subsystem: multinetSubsystem,
+				Name:      "dial_count",
+				Help:      "Dials count performed by multinet",
+			}, []string{sourceIPLabel, successLabel}),
+	}
+}
+
+func (m *multinetMetrics) Dial(sourceIP string, success bool) {
+	m.dials.With(prometheus.Labels{
+		sourceIPLabel: sourceIP,
+		successLabel:  strconv.FormatBool(success),
+	}).Inc()
+}

internal/metrics/node.go

@@ -25,6 +25,7 @@ type NodeMetrics struct {
 	morphClient   *morphClientMetrics
 	morphCache    *morphCacheMetrics
 	log           logger.LogMetrics
+	multinet      *multinetMetrics
 	// nolint: unused
 	appInfo *ApplicationInfo
 }
@@ -53,6 +54,7 @@ func NewNodeMetrics() *NodeMetrics {
 		morphCache:   newMorphCacheMetrics(namespace),
 		log:          logger.NewLogMetrics(namespace),
 		appInfo:      NewApplicationInfo(misc.Version),
+		multinet:     newMultinetMetrics(namespace),
 	}
 }
 
@@ -120,3 +122,7 @@ func (m *NodeMetrics) MorphCacheMetrics() MorphCacheMetrics {
 func (m *NodeMetrics) LogMetrics() logger.LogMetrics {
 	return m.log
 }
+
+func (m *NodeMetrics) MultinetMetrics() MultinetMetrics {
+	return m.multinet
+}

internal/net/config.go

@@ -0,0 +1,69 @@
+package net
+
+import (
+	"errors"
+	"fmt"
+	"net/netip"
+	"slices"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/metrics"
+	"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
+	Metrics       metrics.MultinetMetrics
+}
+
+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:        newDefaulDialer(),
+		EventHandler:  newEventHandler(c.Metrics),
+	}, 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
+}

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
+}

internal/net/dialer.go

@@ -0,0 +1,39 @@
+package net
+
+import (
+	"context"
+	"net"
+	"syscall"
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+type Dialer interface {
+	DialContext(ctx context.Context, network, address string) (net.Conn, error)
+}
+
+func DialContextTCP(ctx context.Context, address string, d Dialer) (net.Conn, error) {
+	return d.DialContext(ctx, "tcp", address)
+}
+
+func newDefaulDialer() 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
+	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)
+			})
+		},
+	}
+}

internal/net/dialer_source.go

@@ -0,0 +1,83 @@
+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
+}
+
+// NetContextDialer returns net.DialContext dial function.
+// Returns nil if multinet disabled.
+func (s *DialerSource) NetContextDialer() func(context.Context, string, string) (net.Conn, error) {
+	s.guard.RLock()
+	defer s.guard.RUnlock()
+
+	if s.c.Enabled {
+		return func(ctx context.Context, network, address string) (net.Conn, error) {
+			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)
+}

internal/net/event_handler.go

@@ -0,0 +1,29 @@
+package net
+
+import (
+	"net"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/metrics"
+	"git.frostfs.info/TrueCloudLab/multinet"
+)
+
+var _ multinet.EventHandler = (*metricsEventHandler)(nil)
+
+type metricsEventHandler struct {
+	m metrics.MultinetMetrics
+}
+
+func (m *metricsEventHandler) DialPerformed(sourceIP net.Addr, _ string, _ string, err error) {
+	sourceIPString := "undefined"
+	if sourceIP != nil {
+		sourceIPString = sourceIP.Network() + "://" + sourceIP.String()
+	}
+	m.m.Dial(sourceIPString, err == nil)
+}
+
+func newEventHandler(m metrics.MultinetMetrics) multinet.EventHandler {
+	if m == nil {
+		return nil
+	}
+	return &metricsEventHandler{m: m}
+}

pkg/innerring/initialization.go

@@ -463,6 +463,7 @@ func (s *Server) initMorph(ctx context.Context, cfg *viper.Viper, errChan chan<-
 		name:             morphPrefix,
 		from:             fromSideChainBlock,
 		morphCacheMetric: s.irMetrics.MorphCacheMetrics(),
+		multinetMetrics:  s.irMetrics.Multinet(),
 	}
 
 	// create morph client

pkg/innerring/innerring.go

@@ -9,6 +9,7 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/metrics"
+	internalNet "git.frostfs.info/TrueCloudLab/frostfs-node/internal/net"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/config"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/processors/alphabet"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/processors/governance"
@@ -116,6 +117,7 @@ type (
 		sgn              *transaction.Signer
 		from             uint32 // block height
 		morphCacheMetric metrics.MorphCacheMetrics
+		multinetMetrics  metrics.MultinetMetrics
 	}
 )
 
@@ -486,6 +488,12 @@ func createClient(ctx context.Context, p *chainParams, errChan chan<- error) (*c
 		return nil, fmt.Errorf("%s chain client endpoints not provided", p.name)
 	}
 
+	nc := parseMultinetConfig(p.cfg, p.multinetMetrics)
+	ds, err := internalNet.NewDialerSource(nc)
+	if err != nil {
+		return nil, fmt.Errorf("dialer source: %w", err)
+	}
+
 	return client.New(
 		ctx,
 		p.key,
@@ -498,6 +506,7 @@ func createClient(ctx context.Context, p *chainParams, errChan chan<- error) (*c
 		}),
 		client.WithSwitchInterval(p.cfg.GetDuration(p.name+".switch_interval")),
 		client.WithMorphCacheMetrics(p.morphCacheMetric),
+		client.WithDialerSource(ds),
 	)
 }
 
@@ -542,6 +551,28 @@ func parseWalletAddressesFromStrings(wallets []string) ([]util.Uint160, error) {
 	return extraWallets, nil
 }
 
+func parseMultinetConfig(cfg *viper.Viper, m metrics.MultinetMetrics) internalNet.Config {
+	nc := internalNet.Config{
+		Enabled:       cfg.GetBool("multinet.enabled"),
+		Balancer:      cfg.GetString("multinet.balancer"),
+		Restrict:      cfg.GetBool("multinet.restrict"),
+		FallbackDelay: cfg.GetDuration("multinet.fallback_delay"),
+		Metrics:       m,
+	}
+	for i := 0; ; i++ {
+		mask := cfg.GetString(fmt.Sprintf("multinet.subnets.%d.mask", i))
+		if mask == "" {
+			break
+		}
+		sourceIPs := cfg.GetStringSlice(fmt.Sprintf("multinet.subnets.%d.source_ips", i))
+		nc.Subnets = append(nc.Subnets, internalNet.Subnet{
+			Prefix:    mask,
+			SourceIPs: sourceIPs,
+		})
+	}
+	return nc
+}
+
 func (s *Server) initConfigFromBlockchain() error {
 	// get current epoch
 	epoch, err := s.netmapClient.Epoch()

pkg/morph/client/constructor.go

@@ -8,6 +8,7 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/metrics"
+	internalNet "git.frostfs.info/TrueCloudLab/frostfs-node/internal/net"
 	morphmetrics "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
 	lru "github.com/hashicorp/golang-lru/v2"
@@ -41,13 +42,13 @@ type cfg struct {
 
 	endpoints []Endpoint
 
-	singleCli *rpcclient.WSClient // neo-go client for single client mode
-
 	inactiveModeCb Callback
 
 	switchInterval time.Duration
 
 	morphCacheMetrics metrics.MorphCacheMetrics
+
+	dialerSource *internalNet.DialerSource
 }
 
 const (
@@ -124,40 +125,24 @@ func New(ctx context.Context, key *keys.PrivateKey, opts ...Option) (*Client, er
 
 	var err error
 	var act *actor.Actor
-	if cfg.singleCli != nil {
+	var endpoint Endpoint
-		// return client in single RPC node mode that uses
+	for cli.endpoints.curr, endpoint = range cli.endpoints.list {
-		// predefined WS client
+		cli.client, act, err = cli.newCli(ctx, endpoint)
-		//
-		// in case of the closing web socket connection:
-		// if extra endpoints were provided via options,
-		// they will be used in switch process, otherwise
-		// inactive mode will be enabled
-		cli.client = cfg.singleCli
-
-		act, err = newActor(cfg.singleCli, acc, *cfg)
 		if err != nil {
-			return nil, fmt.Errorf("could not create RPC actor: %w", err)
+			cli.logger.Warn(logs.FrostFSIRCouldntCreateRPCClientForEndpoint,
-		}
+				zap.Error(err), zap.String("endpoint", endpoint.Address))
-	} else {
+		} else {
-		var endpoint Endpoint
+			cli.logger.Info(logs.FrostFSIRCreatedRPCClientForEndpoint,
-		for cli.endpoints.curr, endpoint = range cli.endpoints.list {
+				zap.String("endpoint", endpoint.Address))
-			cli.client, act, err = cli.newCli(ctx, endpoint)
+			if cli.endpoints.curr > 0 && cli.cfg.switchInterval != 0 {
-			if err != nil {
+				cli.switchIsActive.Store(true)
-				cli.logger.Warn(logs.FrostFSIRCouldntCreateRPCClientForEndpoint,
+				go cli.switchToMostPrioritized(ctx)
-					zap.Error(err), zap.String("endpoint", endpoint.Address))
-			} else {
-				cli.logger.Info(logs.FrostFSIRCreatedRPCClientForEndpoint,
-					zap.String("endpoint", endpoint.Address))
-				if cli.endpoints.curr > 0 && cli.cfg.switchInterval != 0 {
-					cli.switchIsActive.Store(true)
-					go cli.switchToMostPrioritized(ctx)
-				}
-				break
 			}
+			break
 		}
-		if cli.client == nil {
+	}
-			return nil, ErrNoHealthyEndpoint
+	if cli.client == nil {
-		}
+		return nil, ErrNoHealthyEndpoint
 	}
 	cli.setActor(act)
 
@@ -175,6 +160,7 @@ func (c *Client) newCli(ctx context.Context, endpoint Endpoint) (*rpcclient.WSCl
 		Options: rpcclient.Options{
 			DialTimeout:     c.cfg.dialTimeout,
 			TLSClientConfig: cfg,
+			NetDialContext:  c.cfg.dialerSource.NetContextDialer(),
 		},
 	})
 	if err != nil {
@@ -285,17 +271,6 @@ func WithEndpoints(endpoints ...Endpoint) Option {
 	}
 }
 
-// WithSingleClient returns a client constructor option
-// that specifies single neo-go client and forces Client
-// to use it for requests.
-//
-// Passed client must already be initialized.
-func WithSingleClient(cli *rpcclient.WSClient) Option {
-	return func(c *cfg) {
-		c.singleCli = cli
-	}
-}
-
 // WithConnLostCallback return a client constructor option
 // that specifies a callback that is called when Client
 // unsuccessfully tried to connect to all the specified
@@ -320,3 +295,9 @@ func WithMorphCacheMetrics(morphCacheMetrics metrics.MorphCacheMetrics) Option {
 		c.morphCacheMetrics = morphCacheMetrics
 	}
 }
+
+func WithDialerSource(ds *internalNet.DialerSource) Option {
+	return func(c *cfg) {
+		c.dialerSource = ds
+	}
+}

pkg/network/cache/client.go

@@ -5,6 +5,7 @@ import (
 	"sync"
 	"time"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/net"
 	clientcore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/client"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
 )
@@ -25,6 +26,7 @@ type (
 		Key              *ecdsa.PrivateKey
 		ResponseCallback func(client.ResponseMetaInfo) error
 		AllowExternal    bool
+		DialerSource     *net.DialerSource
 	}
 )
 

pkg/network/cache/multi.go

@@ -60,18 +60,21 @@ func (x *multiClient) createForAddress(ctx context.Context, addr network.Address
 		prmInit.Key = *x.opts.Key
 	}
 
+	grpcOpts := []grpc.DialOption{
+		grpc.WithChainUnaryInterceptor(
+			metrics.NewUnaryClientInterceptor(),
+			tracing.NewUnaryClientInteceptor(),
+		),
+		grpc.WithChainStreamInterceptor(
+			metrics.NewStreamClientInterceptor(),
+			tracing.NewStreamClientInterceptor(),
+		),
+		grpc.WithContextDialer(x.opts.DialerSource.GrpcContextDialer()),
+	}
+
 	prmDial := client.PrmDial{
-		Endpoint: addr.URIAddr(),
+		Endpoint:        addr.URIAddr(),
-		GRPCDialOptions: []grpc.DialOption{
+		GRPCDialOptions: grpcOpts,
-			grpc.WithChainUnaryInterceptor(
-				metrics.NewUnaryClientInterceptor(),
-				tracing.NewUnaryClientInteceptor(),
-			),
-			grpc.WithChainStreamInterceptor(
-				metrics.NewStreamClientInterceptor(),
-				tracing.NewStreamClientInterceptor(),
-			),
-		},
 	}
 	if x.opts.DialTimeout > 0 {
 		prmDial.DialTimeout = x.opts.DialTimeout

pkg/services/tree/cache.go

@@ -8,6 +8,7 @@ import (
 	"sync"
 	"time"
 
+	internalNet "git.frostfs.info/TrueCloudLab/frostfs-node/internal/net"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network"
 	metrics "git.frostfs.info/TrueCloudLab/frostfs-observability/metrics/grpc"
 	tracing "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing/grpc"
@@ -21,6 +22,7 @@ type clientCache struct {
 	sync.Mutex
 	simplelru.LRU[string, cacheItem]
 	key *ecdsa.PrivateKey
+	ds  *internalNet.DialerSource
 }
 
 type cacheItem struct {
@@ -36,7 +38,7 @@ const (
 
 var errRecentlyFailed = errors.New("client has recently failed")
 
-func (c *clientCache) init(pk *ecdsa.PrivateKey) {
+func (c *clientCache) init(pk *ecdsa.PrivateKey, ds *internalNet.DialerSource) {
 	l, _ := simplelru.NewLRU(defaultClientCacheSize, func(_ string, value cacheItem) {
 		if conn := value.cc; conn != nil {
 			_ = conn.Close()
@@ -44,6 +46,7 @@ func (c *clientCache) init(pk *ecdsa.PrivateKey) {
 	})
 	c.LRU = *l
 	c.key = pk
+	c.ds = ds
 }
 
 func (c *clientCache) get(ctx context.Context, netmapAddr string) (TreeServiceClient, error) {
@@ -99,6 +102,7 @@ func (c *clientCache) dialTreeService(ctx context.Context, netmapAddr string) (*
 			metrics.NewStreamClientInterceptor(),
 			tracing.NewStreamClientInterceptor(),
 		),
+		grpc.WithContextDialer(c.ds.GrpcContextDialer()),
 	}
 
 	if !netAddr.IsTLSEnabled() {

pkg/services/tree/options.go

@@ -4,6 +4,7 @@ import (
 	"crypto/ecdsa"
 	"time"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/net"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
 	frostfsidcore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/frostfsid"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
@@ -45,6 +46,7 @@ type cfg struct {
 	morphChainStorage    policyengine.MorphRuleChainStorageReader
 
 	metrics MetricsRegister
+	ds      *net.DialerSource
 }
 
 // Option represents configuration option for a tree service.
@@ -161,3 +163,9 @@ func WithNetmapState(state netmap.State) Option {
 		c.state = state
 	}
 }
+
+func WithDialerSource(ds *net.DialerSource) Option {
+	return func(c *cfg) {
+		c.ds = ds
+	}
+}

pkg/services/tree/service.go

@@ -65,7 +65,7 @@ func New(opts ...Option) *Service {
 		s.log = &logger.Logger{Logger: zap.NewNop()}
 	}
 
-	s.cache.init(s.key)
+	s.cache.init(s.key, s.ds)
 	s.closeCh = make(chan struct{})
 	s.replicateCh = make(chan movePair, s.replicatorChannelCapacity)
 	s.replicateLocalCh = make(chan applyOp)