Update initramfs when links change

In order to make the default link take effect initramfs needs to be
updated. This change also updates the default link to use the
recommended defaults from the systemd-networkd documentation.

Default link config:
- https://www.freedesktop.org/software/systemd/man/systemd.link.html#Examples

See this thread for bug info:
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=793374

Change-Id: I5430da4acad1e36b7593ad6791afbebf9e730bba
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

handlers/main.yml

@@ -22,3 +22,6 @@
     - systemd_run_networkd | bool
   tags:
     - systemd-networkd
+
+- name: Update initramfs
+  command: "{{ systemd_networkd_update_initramfs }}"

tasks/main.yml

@@ -57,6 +57,7 @@
     config_type: "ini"
   notify:
     - Restart systemd-networkd
+    - Update initramfs
   tags:
     - systemd-networkd
 

templates/systemd-network-link.j2

@@ -1,4 +1,5 @@
 # {{ ansible_managed }}
 
 [Link]
+NamePolicy=kernel database onboard slot path
 MACAddressPolicy=persistent

vars/redhat-7.yml

@@ -15,3 +15,5 @@
 
 systemd_networkd_distro_packages:
   - systemd-networkd
+
+systemd_networkd_update_initramfs: "dracut -f"

vars/suse-42.yml

@@ -0,0 +1,16 @@
+---
+# Copyright 2018, Rackspace US, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+systemd_networkd_update_initramfs: "dracut -f"

vars/ubuntu-16.04.yml

@@ -0,0 +1,16 @@
+---
+# Copyright 2018, Rackspace US, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+systemd_networkd_update_initramfs: "/usr/sbin/update-initramfs -u"