Networkd multi-address support/fix (#1685)

Fix that given a cloud-init network config with multiple addresses for
an interface the networkd backend outputs an invalid networkd service
config. According to the `man` page of `systemd-networkd` only one
`Address=` field per `[Address]` section is allowed.

1 files changed, 10 insertions, 4 deletions

diff --git a/cloudinit/net/networkd.py b/cloudinit/net/networkd.py
index 4a52d5dd..abfc1037 100644
--- a/cloudinit/net/networkd.py
+++ b/cloudinit/net/networkd.py
@@ -46,10 +46,16 @@ class CfgParser:
         for k, v in sorted(self.conf_dict.items()):
             if not v:
                 continue
-            contents += "[" + k + "]\n"
-            for e in sorted(v):
-                contents += e + "\n"
-            contents += "\n"
+            if k == "Address":
+                for e in sorted(v):
+                    contents += "[" + k + "]\n"
+                    contents += e + "\n"
+                    contents += "\n"
+            else:
+                contents += "[" + k + "]\n"
+                for e in sorted(v):
+                    contents += e + "\n"
+                contents += "\n"
 
         return contents