From: Dermot Bradley <dermot_bradley@yahoo.com>
Date: Thu, 15 Oct 2020 00:17 +0100
Subject: [PATCH] cloud-init: Make wakeonlan setting actually work

The "wakeonlan" option in cloud-init Network Config v2 YAML files did
not actually do anything on Linux systems using /etc/network/interfaces
files (i.e. Alpine and Debian).

This patch ensures that when "wakeonlan: true" is present in a
Network Config v2 YAML file that the equivalent entry will be written
to /e/n/i.

This change has already been submitted upstream as PR #626, therefore
this patch can be (hopefully) removed upon the next upstream release.

---

diff -aur a/cloudinit/net/eni.py b/cloudinit/net/eni.py
--- a/cloudinit/net/eni.py
+++ b/cloudinit/net/eni.py
@@ -401,6 +401,10 @@
         sections = []
         subnets = iface.get('subnets', {})
         accept_ra = iface.pop('accept-ra', None)
+        ethernet_wol = iface.pop('wakeonlan', None)
+        if ethernet_wol is not None:
+            # Specify WOL setting 'g' for using "Magic Packet"
+            iface['ethernet-wol'] = 'g'
         if subnets:
             for index, subnet in enumerate(subnets):
                 ipv4_subnet_mtu = None
diff -aur a/cloudinit/net/network_state.py b/cloudinit/net/network_state.py
--- a/cloudinit/net/network_state.py
+++ b/cloudinit/net/network_state.py
@@ -369,6 +369,9 @@
         accept_ra = command.get('accept-ra', None)
         if accept_ra is not None:
             accept_ra = util.is_true(accept_ra)
+        wakeonlan = command.get('wakeonlan', None)
+        if wakeonlan is not None:
+            wakeonlan = util.is_true(wakeonlan)
         iface.update({
             'name': command.get('name'),
             'type': command.get('type'),
@@ -379,7 +382,8 @@
             'address': None,
             'gateway': None,
             'subnets': subnets,
-            'accept-ra': accept_ra
+            'accept-ra': accept_ra,
+            'wakeonlan': wakeonlan
         })
         self._network_state['interfaces'].update({command.get('name'): iface})
         self.dump_network_state()