fix(region): fix default network on get desc (#21397)

pkg/compute/models/guest_actions.go

@@ -2794,10 +2794,22 @@ func (self *SGuest) PerformDetachnetwork(
 	return nil, nil
 }
 
-func (guest *SGuest) fixDefaultGateway(ctx context.Context, userCred mcclient.TokenCredential) error {
+func (guest *SGuest) fixDefaultGatewayByNics(ctx context.Context, userCred mcclient.TokenCredential, nics []SGuestnetwork) (bool, error) {
 	defaultGwCnt := 0
+	for i := range nics {
+		if nics[i].Virtual || len(nics[i].TeamWith) > 0 {
+			continue
+		}
+		if nics[i].IsDefault {
+			defaultGwCnt++
+		}
+	}
+
+	if defaultGwCnt == 1 {
+		return false, nil
+	}
+
 	nicList := netutils2.SNicInfoList{}
-	nics, _ := guest.GetNetworks("")
 	for i := range nics {
 		if nics[i].Virtual || len(nics[i].TeamWith) > 0 {
 			continue
@@ -2805,22 +2817,24 @@ func (guest *SGuest) fixDefaultGateway(ctx context.Context, userCred mcclient.To
 		net, _ := nics[i].GetNetwork()
 		if net != nil {
 			nicList = nicList.Add(nics[i].IpAddr, nics[i].MacAddr, net.GuestGateway)
-			if nics[i].IsDefault {
-				defaultGwCnt++
-			}
 		}
 	}
-	if defaultGwCnt != 1 {
-		gwMac, _ := nicList.FindDefaultNicMac()
-		if gwMac != "" {
-			err := guest.setDefaultGateway(ctx, userCred, gwMac)
-			if err != nil {
-				log.Errorf("setDefaultGateway fail %s", err)
-				return errors.Wrap(err, "setDefaultGateway")
-			}
+
+	gwMac, _ := nicList.FindDefaultNicMac()
+	if gwMac != "" {
+		err := guest.setDefaultGateway(ctx, userCred, gwMac)
+		if err != nil {
+			log.Errorf("setDefaultGateway fail %s", err)
+			return true, errors.Wrap(err, "setDefaultGateway")
 		}
 	}
-	return nil
+	return true, nil
+}
+
+func (guest *SGuest) fixDefaultGateway(ctx context.Context, userCred mcclient.TokenCredential) error {
+	nics, _ := guest.GetNetworks("")
+	_, err := guest.fixDefaultGatewayByNics(ctx, userCred, nics)
+	return err
 }
 
 func (self *SGuest) PerformAttachnetwork(

pkg/compute/models/guests.go

@@ -5211,6 +5211,10 @@ func (self *SGuest) GetJsonDescAtHypervisor(ctx context.Context, host *SHost) *a
 	// nics, domain
 	desc.Domain = options.Options.DNSDomain
 	nics, _ := self.GetNetworks("")
+	changed, _ := self.fixDefaultGatewayByNics(ctx, auth.AdminCredential(), nics)
+	if changed {
+		nics, _ = self.GetNetworks("")
+	}
 	for _, nic := range nics {
 		nicDesc := nic.getJsonDescAtHost(ctx, host)
 		desc.Nics = append(desc.Nics, nicDesc)
@@ -5320,6 +5324,7 @@ func (self *SGuest) GetJsonDescAtBaremetal(ctx context.Context, host *SHost) *ap
 
 	desc.DiskConfig = host.getDiskConfig()
 
+	self.fixDefaultGateway(ctx, auth.AdminCredential())
 	netifs := host.GetAllNetInterfaces()
 	desc.Domain = options.Options.DNSDomain
 

pkg/hostman/guestfs/fsdriver/linux.go

@@ -1317,6 +1317,11 @@ func getMainNic(nics []*types.SServerNic) *types.SServerNic {
 			return nics[i]
 		}
 	}
+	for i := range nics {
+		if len(nics[i].Gateway) > 0 {
+			return nics[i]
+		}
+	}
 	return nil
 }