Fix issue with reusing existing public and creating ephemeral IP addr…

…ess for all interfaces

examples/vpc_peering_common/main.tf

@@ -142,6 +142,7 @@ module "vmseries" {
       subnetwork       = module.vpc[v.vpc_network_key].subnetworks[v.subnetwork_key].self_link
       private_ip       = v.private_ip
       create_public_ip = try(v.create_public_ip, false)
+      public_ip        = try(v.public_ip, null)
   }]
 }
 

modules/vmseries/main.tf

@@ -7,7 +7,7 @@ locals {
       nat_ip                 = try(v.public_ip, google_compute_address.public[k].address, null)
       public_ptr_domain_name = try(v.public_ptr_domain_name, google_compute_address.public[k].public_ptr_domain_name, null)
     }
-    if can(v.public_ip) || local.create_public_ip[k]
+    if try(v.public_ip, null) != null || local.create_public_ip[k]
   }
 }