[#1486] node: Introduce dual service support

* Register GRPC services for both neo.fs.v2 and frost.fs namespaces
* Use this temporary solution until all nodes are updated

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

cmd/frostfs-node/accounting.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"net"
+	"strings"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/balance"
 	accountingTransportGRPC "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network/transport/accounting/grpc"
@@ -30,5 +31,27 @@ func initAccountingService(ctx context.Context, c *cfg) {
 
 	c.cfgGRPC.performAndSave(func(_ string, _ net.Listener, s *grpc.Server) {
 		accountingGRPC.RegisterAccountingServiceServer(s, server)
+
+		// TODO(@aarifullin): #1487 remove the dual service support.
+		s.RegisterService(frostFSServiceDesc(accountingGRPC.AccountingService_ServiceDesc), server)
 	})
 }
+
+// frostFSServiceDesc creates a service descriptor with the new namespace for dual service support.
+func frostFSServiceDesc(sd grpc.ServiceDesc) *grpc.ServiceDesc {
+	sdLegacy := new(grpc.ServiceDesc)
+	*sdLegacy = sd
+
+	const (
+		legacyNamespace           = "neo.fs.v2"
+		apemanagerLegacyNamespace = "frostfs.v2"
+		newNamespace              = "frost.fs"
+	)
+
+	if strings.HasPrefix(sd.ServiceName, legacyNamespace) {
+		sdLegacy.ServiceName = strings.ReplaceAll(sd.ServiceName, legacyNamespace, newNamespace)
+	} else if strings.HasPrefix(sd.ServiceName, apemanagerLegacyNamespace) {
+		sdLegacy.ServiceName = strings.ReplaceAll(sd.ServiceName, apemanagerLegacyNamespace, newNamespace)
+	}
+	return sdLegacy
+}

cmd/frostfs-node/apemanager.go

@@ -26,5 +26,8 @@ func initAPEManagerService(c *cfg) {
 
 	c.cfgGRPC.performAndSave(func(_ string, _ net.Listener, s *grpc.Server) {
 		apemanager_grpc.RegisterAPEManagerServiceServer(s, server)
+
+		// TODO(@aarifullin): #1487 remove the dual service support.
+		s.RegisterService(frostFSServiceDesc(apemanager_grpc.APEManagerService_ServiceDesc), server)
 	})
 }

cmd/frostfs-node/container.go

@@ -64,6 +64,9 @@ func initContainerService(_ context.Context, c *cfg) {
 
 	c.cfgGRPC.performAndSave(func(_ string, _ net.Listener, s *grpc.Server) {
 		containerGRPC.RegisterContainerServiceServer(s, server)
+
+		// TODO(@aarifullin): #1487 remove the dual service support.
+		s.RegisterService(frostFSServiceDesc(containerGRPC.ContainerService_ServiceDesc), server)
 	})
 
 	c.cfgObject.cfgLocalStorage.localStorage.SetContainerSource(cnrRdr)

cmd/frostfs-node/netmap.go

@@ -166,6 +166,9 @@ func initNetmapService(ctx context.Context, c *cfg) {
 
 	c.cfgGRPC.performAndSave(func(_ string, _ net.Listener, s *grpc.Server) {
 		netmapGRPC.RegisterNetmapServiceServer(s, server)
+
+		// TODO(@aarifullin): #1487 remove the dual service support.
+		s.RegisterService(frostFSServiceDesc(netmapGRPC.NetmapService_ServiceDesc), server)
 	})
 
 	addNewEpochNotificationHandlers(c)

cmd/frostfs-node/object.go

@@ -218,6 +218,9 @@ func initObjectService(c *cfg) {
 
 	c.cfgGRPC.performAndSave(func(_ string, _ net.Listener, s *grpc.Server) {
 		objectGRPC.RegisterObjectServiceServer(s, server)
+
+		// TODO(@aarifullin): #1487 remove the dual service support.
+		s.RegisterService(frostFSServiceDesc(objectGRPC.ObjectService_ServiceDesc), server)
 	})
 }
 

cmd/frostfs-node/session.go

@@ -61,5 +61,8 @@ func initSessionService(c *cfg) {
 
 	c.cfgGRPC.performAndSave(func(_ string, _ net.Listener, s *grpc.Server) {
 		sessionGRPC.RegisterSessionServiceServer(s, server)
+
+		// TODO(@aarifullin): #1487 remove the dual service support.
+		s.RegisterService(frostFSServiceDesc(sessionGRPC.SessionService_ServiceDesc), server)
 	})
 }