Allow networkd filename override

- Allow configuring the default filename format
- Allow configuring a filename override on a per netdev/network
  basis.

Change-Id: I801fe5604d543ae36daf5bd1764ef1035644ea44

defaults/main.yml

@@ -19,6 +19,10 @@ systemd_interface_cleanup: false
 # Enable systemd-networkd and (re)start the service
 systemd_run_networkd: false
 
+# Default filename formatting
+systemd_networkd_netdev_filename: "{{ item.0 }}-{{ item.1.NetDev.Name }}.netdev"
+systemd_networkd_network_filename: "{{ item.0 }}-{{ item.1.interface }}.network"
+
 # The `systemd_link_config_overrides` option can be used on the default link.
 #  See the following link for all available options:
 #   https://www.freedesktop.org/software/systemd/man/systemd.link.html
@@ -41,6 +45,7 @@ systemd_link_config_overrides: {}
 #   - NetDev:
 #       Name: dummy1
 #       Kind: dummy
+#     filename: "{{ item.1.NetDev.Name }}.netdev"
 #   - NetDev:
 #       Name: bond0
 #       Kind: bond
@@ -84,6 +89,7 @@ systemd_netdevs: []
 #     bridge: "bond0"
 #     mtu: 9000
 #   - interface: "dummy1"
+#     filename: "{{ item.1.interface }}.network"
 #     bridge: "bond0"
 #     mtu: 9000
 #   - interface: "bond0"

tasks/main.yml

@@ -55,7 +55,7 @@
 - name: Create systemd-networkd network device(s)
   template:
     src: "systemd-netdev.j2"
-    dest: "/etc/systemd/network/{{ item.0 }}-{{ item.1.NetDev.Name }}.netdev"
+    dest: "/etc/systemd/network/{{ item.1.filename | default(systemd_networkd_netdev_filename) }}"
     owner: "root"
     group: "root"
     mode: "0644"
@@ -66,7 +66,7 @@
 - name: Create systemd-networkd network(s)
   config_template:
     src: "systemd-network.j2"
-    dest: "/etc/systemd/network/{{ item.0 }}-{{ item.1.interface }}.network"
+    dest: "/etc/systemd/network/{{ item.1.filename | default(systemd_networkd_network_filename) }}"
     owner: "root"
     group: "root"
     mode: "0644"

templates/systemd-netdev.j2

@@ -1,9 +1,12 @@
 # {{ ansible_managed }}
 
+{% set _ignored_sections = ['filename'] %}
 {% for key, values in item.1.items() %}
+{%   if key not in _ignored_sections %}
 [{{ key }}]
 {%     for k, v in values.items() %}
 {{ k }}={{ v }}
 {%     endfor %}
+{%   endif %}
 
 {% endfor %}