Ignore route with ipv6 gateway

hyperstart_agent.go

@@ -143,6 +143,12 @@ func (h *hyper) processHyperRoute(route netlink.Route, deviceName string) *hyper
 	gateway := route.Gw.String()
 	if gateway == "<nil>" {
 		gateway = ""
+	} else if route.Gw.To4() == nil { // Skip IPv6 as it is not supported by hyperstart agent
+		h.Logger().WithFields(logrus.Fields{
+			"unsupported-route-type": "ipv6",
+			"gateway":                gateway,
+		}).Warn("unsupported route")
+		return nil
 	}
 
 	var destination string

kata_agent.go

@@ -375,7 +375,17 @@ func (k *kataAgent) generateInterfacesAndRoutes(networkNS NetworkNamespace) ([]*
 			}
 
 			if route.Gw != nil {
-				r.Gateway = route.Gw.String()
+				gateway := route.Gw.String()
+
+				if route.Gw.To4() == nil {
+					// Skip IPv6 because is is not supported
+					k.Logger().WithFields(logrus.Fields{
+						"unsupported-route-type": "ipv6",
+						"gateway":                gateway,
+					}).Warn("unsupported route")
+					continue
+				}
+				r.Gateway = gateway
 			}
 
 			if route.Src != nil {