feat: add next_hop_ilb to routes module (#241)

Author: bharathkkb

modules/routes/README.md

@@ -73,4 +73,5 @@ The routes list contains maps, where each object represents a route. For the nex
 | next\_hop\_instance |  URL or name of an instance that should handle matching packets. If just name is specified "next\_hop\_instance\_zone" is required | string | - | yes |
 | next\_hop\_instance\_zone |  The zone of the instance specified in next\_hop\_instance. Only required if next\_hop\_instance is specified as a name | string | - | no |
 | next\_hop\_vpn\_tunnel | URL to a VpnTunnel that should handle matching packets | string | - | yes |
+| next\_hop\_ilb | The URL to a forwarding rule of type loadBalancingScheme=INTERNAL that should handle matching packets. | string | - | no |
 | priority | The priority of this route. Priority is used to break ties in cases where there is more than one matching route of equal prefix length. In the case of two routes with equal prefix length, the one with the lowest-numbered priority value wins | string | `"1000"` | yes |

modules/routes/main.tf

@@ -39,6 +39,7 @@ resource "google_compute_route" "route" {
   next_hop_instance      = lookup(each.value, "next_hop_instance", null)
   next_hop_instance_zone = lookup(each.value, "next_hop_instance_zone", null)
   next_hop_vpn_tunnel    = lookup(each.value, "next_hop_vpn_tunnel", null)
+  next_hop_ilb           = lookup(each.value, "next_hop_ilb", null)
   priority               = lookup(each.value, "priority", null)
 
   depends_on = [var.module_depends_on]