feat: add incus image host (#254)

- add role
- add consul service + checks
- manage the datavol as zfs
- insure the incus fact exists before attempting to read it

Reviewed-on: https://git.query.consul/unkinben/puppet-prod/pulls/254

modules/incus/manifests/init.pp

@@ -9,6 +9,7 @@ class incus (
   String        $bridge       = 'incusbr0',
   Stdlib::Port        $server_port = 8443,
   Stdlib::IP::Address $server_addr = $facts['networking']['ip'],
+  Optional[String] $storage_images_volume = undef,
 ) {
 
   package { $packages:
@@ -55,11 +56,22 @@ class incus (
     }
   }
 
-  # set core.https_address
-  if $facts['incus']['config']['core.https_address'] != "${server_addr}:${server_port}" {
-    exec { 'incus_config_set_core_https_address':
-      path    => ['/bin', '/usr/bin'],
-      command => "incus config set core.https_address ${server_addr}:${server_port}",
+  if $facts['incus'] and $facts['incus']['config'] {
+    # set core.https_address
+    if $facts['incus']['config']['core.https_address'] != "${server_addr}:${server_port}" {
+      exec { 'incus_config_set_core_https_address':
+        path    => ['/bin', '/usr/bin'],
+        command => "incus config set core.https_address ${server_addr}:${server_port}",
+      }
+    }
+    # set storage.images_volume # path to store images
+    if $storage_images_volume {
+      if $facts['incus']['config']['storage.images_volume'] != $storage_images_volume {
+        exec { 'incus_config_set_storage_images_volume':
+          path    => ['/bin', '/usr/bin'],
+          command => "incus config set storage.images_volume ${storage_images_volume}",
+        }
+      }
     }
   }
 }