Nomad exec driver causes Docker to fail

[michaelmcguinness]

Very interesting presentation. Inspired by your approach I wanted to run Fabio using the exec driver in Nomad. When I do I am not longer able to pull docker images on the Nomad client.

root@ip-10-75-70-20:~# docker pull nginx Using default tag: latest latest: Pulling from library/nginx 75a822cd7888: Extracting [==================================================>] 51.36 MB/51.36 MB 64f0219ba3ea: Download complete 325b624bee1c: Download complete failed to register layer: open /dev/mapper/docker-202:32-262145-66cc9c654f537691d81b2ca71a9037b47647db7ebb68c7bd5805d035de4529d8: no such file or directory
I originally though this was an issue with Fabio and raised the issue there where it goes into detail about the environment and test case.
fabiolb/fabio#192
I have used your job spec changing only the datacenters list and adding a region and have repeated the issue using the fabiotest code that the dev kindly posted and executing the Consul binary.
I was wondering if there was anything obvious I have missed here? Since I raised the issue I have bumped the Nomad and Docker versions to 0.5.1 and 1.12.5 respectively.

[michaelmcguinness]

Pretty certain that this issue is caused by a combination of kernel revision and LVM implementation. I don't see the issue with AUFS. I'd be interested to know the storage option you were using?