Postgresql using lxd faild to find address

Hi I am using postgresql 9.5 in lxd container on Ubuntu. Using the stock
64bit 16.04 ubuntu image. Postgres is working just fine within the
container, but when I try to assign the ip address associated to the
container it fails to recognize it at boot. When I restart postgresql it
recognizes it just fine. So it seems like it is not getting the ip address,
maybe it is a little bit slower. Anyway to delay the boot time?

Steps to reproduce:
1. Setup lxd container
2. Install postgresql-9.5
3. Configure ip address in the config
4. restart container

Symptoms:
1. postgresql running fine
2. No ip address assigned to postgresql

Logs:
2016-10-10 14:40:33 UTC [143-1] LOG: could not bind IPv4 socket: Cannot
assign requested address
2016-10-10 14:40:33 UTC [143-2] HINT: Is another postmaster already
running on port 5432? If not, wait a few seconds and retry.
2016-10-10 14:40:33 UTC [143-3] WARNING: could not create listen socket
for "10.0.3.51"
2016-10-10 14:40:33 UTC [144-1] LOG: database system was shut down at
2016-10-07 23:05:34 UTC
2016-10-10 14:40:33 UTC [144-2] LOG: MultiXact member wraparound
protections are now enabled
2016-10-10 14:40:33 UTC [143-4] LOG: database system is ready to accept
connections
2016-10-10 14:40:33 UTC [148-1] LOG: autovacuum launcher started

#systemctl restart postgresql

2016-10-10 15:17:33 UTC [2353-1] LOG: database system was shut down at
2016-10-10 15:17:32 UTC
2016-10-10 15:17:33 UTC [2353-2] LOG: MultiXact member wraparound
protections are now enabled
2016-10-10 15:17:33 UTC [2352-1] LOG: database system is ready to accept
connections
2016-10-10 15:17:33 UTC [2357-1] LOG: autovacuum launcher started

Thanks