Hi,

We are moving our openstack installation to pike and followed the steps provided at the site for single node deployment : https://docs.openstack.org/kolla-ansi...

On adding the changes for mtu in kolla.conf and restarting docker I keep getting the following error:

Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.

And on inspecting systemctl status docker.service the logs are:

* docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
  Drop-In: /etc/systemd/system/docker.service.d
           `-http-proxy.conf, kolla.conf
   Active: inactive (dead) (Result: exit-code) since Thu 2017-08-31 06:47:23 EDT; 9s ago
     Docs: https://docs.docker.com
      Process: 11559 ExecStart=/usr/bin/docker daemon -H fd:// --mtu 1400 (code=exited, status=1/FAILURE)
     Main PID: 11559 (code=exited, status=1/FAILURE)

    Aug 31 06:47:23 kickseed systemd[1]: Failed to start Docker Application Container Engine.
    Aug 31 06:47:23 kickseed systemd[1]: docker.service: Unit entered failed state.
Aug 31 06:47:23 kickseed systemd[1]: docker.service: Failed with result 'exit-code'.
Aug 31 06:47:23 kickseed systemd[1]: docker.service: Service hold-off time over, scheduling restart.
Aug 31 06:47:23 kickseed systemd[1]: Stopped Docker Application Container Engine.
Aug 31 06:47:23 kickseed systemd[1]: docker.service: Start request repeated too quickly.
Aug 31 06:47:23 kickseed systemd[1]: Failed to start Docker Application Container Engine.