Issue #121 Investigate failures on CI

[coolbrg]

retest this please

[coolbrg]

@gbraad

Error logs :

-- Logs begin at Wed 2017-08-23 10:25:53 EDT, end at Wed 2017-08-23 10:36:56 EDT. 
--
Aug 23 10:26:09 localhost.localdomain systemd[1]: Starting Docker Application Container 
Engine...
Aug 23 10:26:11 localhost.localdomain dockerd-current[1265]: time="2017-08-
23T10:26:11.077053417-04:00" level=info msg="libcontainerd: new containerd process, pid: 2323"
Aug 23 
10:26:12 localhost.localdomain dockerd-current[1265]: time="2017-08-23T10:26:12.332802978-04:00" 
level=warning msg="devmapper: Usage of loopback devices is strongly discouraged for production use. 
Please use `--storage-opt dm.thinpooldev` or use `man docker` to refer to dm.thinpooldev section."
Aug 23 
10:26:12 localhost.localdomain dockerd-current[1265]: time="2017-08-23T10:26:12.398484213-04:00" 
level=warning msg="devmapper: Base device already exists and has filesystem xfs on it. User specified 
filesystem  will be ignored."
Aug 23 10:26:12 localhost.localdomain dockerd-current[1265]: time="2017-08-
23T10:26:12.542015115-04:00" level=fatal msg="Error starting daemon: layer does not exist"
Aug 23 
10:26:12 localhost.localdomain systemd[1]: docker.service: main process exited, code=exited, 
status=1/FAILURE
Aug 23 10:26:12 localhost.localdomain systemd[1]: Failed to start Docker Application 
Container Engine.
Aug 23 10:26:12 localhost.localdomain systemd[1]: Unit docker.service entered failed 
state.
Aug 23 10:26:12 localhost.localdomain systemd[1]: docker.service failed.
'

which is similar to here https://github.com/moby/moby/issues/22685.

[gbraad]

This is interesting and should be checked: https://github.com/moby/moby/issues/22685#issuecomment-281202112

this can be done with minishift ssh -- cat /etc/systemd/system/docker.service.d/10-machine.conf IIRC