Always ensure the correct services are enabled/disabled

README.md

@@ -5,6 +5,9 @@ configuration.
 "systemd-networkd is a system service that manages networks".
 For DNS resolution, you can choose between systemd-resolved and resolvconf.
 
+The legacy `networking.service` can optionally be enabled, see
+[`systemd_network_enable_legacy_networking`](#role-variable-defaults).
+
 ## Requirements
 
 An apt based system that has systemd-networkd preinstalled,
@@ -276,9 +279,10 @@ systemd_network_networks:
 
 ## Role variable defaults
 
-| Name                           | Default            | Description                                    |
-| :----------------------------- | :----------------- | :--------------------------------------------- |
-| `systemd_network_netdevs`      | `{}`               | [#detailed-description](#detailed-description) |
-| `systemd_network_networks`     | `{}`               | [#detailed-description](#detailed-description) |
-| `systemd_network_copy_files`   | `[]`               | [#upload-extra-files](#upload-extra-files)     |
-| `systemd_network_dns_resolver` | `systemd-resolved` | [#dns-resolver](#dns-resolver)                 |
+| Name                                       | Default              | Description                                    |
+| :----------------------------------------- | :------------------- | :--------------------------------------------- |
+| `systemd_network_netdevs`                  | `{}`                 | [#detailed-description](#detailed-description) |
+| `systemd_network_networks`                 | `{}`                 | [#detailed-description](#detailed-description) |
+| `systemd_network_copy_files`               | `[]`                 | [#upload-extra-files](#upload-extra-files)     |
+| `systemd_network_dns_resolver`             | `"systemd-resolved"` | [#dns-resolver](#dns-resolver)                 |
+| `systemd_network_enable_legacy_networking` | `False`              | Whether to enable `networking.service`         |

defaults/main.yml

@@ -3,3 +3,4 @@ systemd_network_netdevs: {}
 systemd_network_networks: {}
 systemd_network_copy_files: []
 systemd_network_dns_resolver: systemd-resolved
+systemd_network_enable_legacy_networking: False

handlers/main.yml

@@ -8,18 +8,3 @@
     name: systemd-networkd
     enabled: True
     state: restarted
-
-- name: Disable unwanted resolvers
-  service:
-    name: "{{ item }}"
-    enabled: False
-    state: stopped
-  loop: "{{ _systemd_network_resolv_conf_paths.keys() | difference([systemd_network_dns_resolver]) }}"
-  listen: Configure resolver
-
-- name: Enable wanted resolver
-  service:
-    name: "{{ systemd_network_dns_resolver }}"
-    enabled: True
-    state: started
-  listen: Configure resolver

tasks/main.yml

@@ -42,5 +42,28 @@
     state: link
     src: "{{ _systemd_network_resolv_conf_paths[systemd_network_dns_resolver] }}"
     force: True
-  notify:
-    - Configure resolver
+
+- name: Disable unwanted resolvers
+  service:
+    name: "{{ item }}"
+    enabled: False
+    state: stopped
+  loop: "{{ _systemd_network_resolv_conf_paths.keys() | difference([systemd_network_dns_resolver]) }}"
+
+- name: Enable wanted resolver
+  service:
+    name: "{{ systemd_network_dns_resolver }}"
+    enabled: True
+    state: started
+
+- name: Configure legacy networking
+  service:
+    name: networking
+    enabled: "{{ systemd_network_enable_legacy_networking }}"
+    state: "{% if systemd_network_enable_legacy_networking %}started{% else %}stopped{% endif %}"
+
+- name: Enable systemd-networkd
+  service:
+    name: systemd-networkd
+    enabled: True
+    state: started