Hi
Followed https://wiki.openstack.org/wiki/Docker + some extra steps, https://ask.openstack.org/en/question..., to install Docker on Kilo. Instantiated rastasheep/ubuntu-sshd:14.04 docker image, on a multinode setup, based on Ubuntu 14.04. Assigned a floating IP to the instance and am able to ping externally; however, cannot ssh to instance. Tried the following:
On the network node, can ping instance's private IP, via netns:

# ip netns exec  qdhcp-b2ef7455-4180-4c66-a12c-917b6dfa7814 ping 10.40.100.17
PING 10.40.100.17 (10.40.100.17) 56(84) bytes of data.
64 bytes from 10.40.100.17: icmp_seq=1 ttl=64 time=1.11 ms
64 bytes from 10.40.100.17: icmp_seq=2 ttl=64 time=0.638 ms
64 bytes from 10.40.100.17: icmp_seq=3 ttl=64 time=0.240 ms
...
# ip netns exec  qrouter-1b699d5a-aa76-4471-9215-589f8c6be39e ping 10.40.100.17
PING 10.40.100.17 (10.40.100.17) 56(84) bytes of data.
64 bytes from 10.40.100.17: icmp_seq=1 ttl=64 time=1.38 ms
64 bytes from 10.40.100.17: icmp_seq=2 ttl=64 time=0.269 ms
64 bytes from 10.40.100.17: icmp_seq=3 ttl=64 time=0.316 ms
...

Can also ping externally:

# neutron  floatingip-list
+--------------------------------------+------------------+---------------------+--------------------------------------+
| id                                   | fixed_ip_address | floating_ip_address | port_id                              |
+--------------------------------------+------------------+---------------------+--------------------------------------+
| f4dbb89f-b030-44c7-b0b6-097260270d47 | 10.40.100.17     | 10.4.50.54          | e3ff0376-8b02-4784-a2d9-f7a27ae982e6 |
+--------------------------------------+------------------+---------------------+--------------------------------------+
#
$ ping 10.4.50.54 
PING 10.4.50.54 (10.4.50.54) 56(84) bytes of data.
64 bytes from 10.4.50.54: icmp_seq=1 ttl=63 time=1.47 ms
64 bytes from 10.4.50.54: icmp_seq=2 ttl=63 time=0.912 ms
64 bytes from 10.4.50.54: icmp_seq=3 ttl=63 time=0.619 ms

Executing bash on the running instance, I can ssh and ping the instance:

# docker exec -it c2363ef4a783 /bin/bash
root@instance-00000016:/# ifconfig
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:51 errors:0 dropped:0 overruns:0 frame:0
          TX packets:51 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:8150 (8.1 KB)  TX bytes:8150 (8.1 KB)

nse3ff0376-8b Link encap:Ethernet  HWaddr fa:16:3e:31:c3:ed  
          inet addr:10.40.100.17  Bcast:0.0.0.0  Mask:255.255.255.0
          inet6 addr: fe80::f816:3eff:fe31:c3ed/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:297 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3085 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:32243 (32.2 KB)  TX bytes:365503 (365.5 KB)

root@instance-00000016:/# ping 10.40.100.17
PING 10.40.100.17 (10.40.100.17) 56(84) bytes of data.
64 bytes from 10.40.100.17: icmp_seq=1 ttl=64 time=0.046 ms
64 ...