asterisk failed to start under systemd

[god]

Installed asterisk from repo on 15.04 x86_64: Version: 1:13.1.0~dfsg-1ubuntu2
When started automatically on boot it's failing - no binding to ports 5060 for unknown reason.

Curiously when started manually (as root of course) asterisk is working just fine. So I guess it's hairy and ugly /etc/init.d/asterisk mess to blame and an ultimate fix would be to finally ship asterisk.service instead.

But in a meantime I'm looking for workaround to make this work.

systemctl status is 'degraded' after boot.
systemctl status asterisk
● asterisk.service - Asterisk PBX
   Loaded: loaded (/lib/systemd/system/asterisk.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2015-07-22 11:47:11 UTC; 1min 10s ago
     Docs: man:asterisk(8)
 Main PID: 1102 (asterisk)
   CGroup: /lxc/asterisk/system.slice/asterisk.service
           └─1102 /usr/sbin/asterisk -g -f -U asterisk

Jul 22 11:47:11 asterisk systemd[1]: Started Asterisk PBX.
Jul 22 11:47:11 asterisk systemd[1]: Starting Asterisk PBX...

does not report anything suspicious.

journalctl -a -u asterisk
-- Logs begin at Wed 2015-07-22 11:45:04 UTC, end at Wed 2015-07-22 11:47:12 UTC. --
Jul 22 11:47:11 asterisk systemd[1]: Started Asterisk PBX.
Jul 22 11:47:11 asterisk systemd[1]: Starting Asterisk PBX...

as well as journalctl.

Yet, no port binding:
"ss -tapn | grep 5060" - gives nothing.

ps aux|grep asterisk
asterisk 1102 0.0 0.3 1496976 29660 ? Ssl 11:47 0:01 /usr/sbin/asterisk -g -f -U asterisk

Although asterisk is running.

[god (humper)]

Attached are the only 2 modified configuration files.

[god (humper)]

My bad - turned out to be permission issue which prevented asterisk from reading it's config files. Nevertheless - having native .service file instead of legacy shell script would make this a bit easier to troubleshoot.