Refactor network module to accept free-form config maps

Replace hypervisor_parent/witness_parent strings with hypervisor_config
and witness_config map(string) variables, matching the pattern already
used by the storage module. incus_networks in the root module is updated
from map(number) to map(object) carrying type and the two config maps.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

incus/modules/network/main.tf

@@ -11,9 +11,7 @@ resource "incus_network" "hypervisor" {
   name     = var.name
   target   = each.key
   type     = var.type
-  config = {
-    "parent" = var.hypervisor_parent
-  }
+  config = var.hypervisor_config
 }
 
 resource "incus_network" "witness" {
@@ -21,9 +19,7 @@ resource "incus_network" "witness" {
   name     = var.name
   target   = each.key
   type     = var.type
-  config = {
-    "parent" = var.witness_parent
-  }
+  config   = var.witness_config
 }
 
 resource "incus_network" "this" {

incus/modules/network/variables.tf

@@ -15,12 +15,12 @@ variable "witnesses" {
   type = set(string)
 }
 
-variable "hypervisor_parent" {
-  type    = string
-  default = "br0"
+variable "hypervisor_config" {
+  type    = map(string)
+  default = {}
 }
 
-variable "witness_parent" {
-  type    = string
-  default = "dummy0"
+variable "witness_config" {
+  type    = map(string)
+  default = {}
 }

incus/network.auto.tfvars

@@ -1,3 +1,11 @@
 incus_networks = {
-  "main" = 0
+  "main" = {
+    type = "physical"
+    hypervisor_config = {
+      "parent" = "br0"
+    }
+    witness_config = {
+      "parent" = "dummy0"
+    }
+  }
 }

incus/network.tf

@@ -2,7 +2,10 @@ module "network" {
   source            = "./modules/network"
   for_each          = var.incus_networks
   name              = each.key
+  type              = each.value.type
   hypervisors       = toset(keys(var.incus_hypervisors))
   witnesses         = toset(keys(var.incus_witnesses))
+  hypervisor_config = each.value.hypervisor_config
+  witness_config    = each.value.witness_config
 }
 

incus/variables.tf

@@ -13,7 +13,11 @@ variable "incus_token" {
 }
 
 variable "incus_networks" {
-  type = map(number)
+  type = map(object({
+    type              = string
+    hypervisor_config = map(string)
+    witness_config    = map(string)
+  }))
 }
 
 variable "incus_storage_pools" {