docker container failed to start on ubuntu 14.04 - permission denied

docker based murano app failed to start because of permission denied trying to execute startup script.

We hit a bug like https://github.com/docker/docker/issues/783 with aufs

Unprivileged user is trying to start script.sh and got Permission denied for no reason. Workaround for this is to move denied directory to different location, move it again and chown one more time. Then we could see successful start.

root@murano-irdstiqaw4pep1a-afcdbiqaw4hni2-t3pkvhixizf5:~# docker info
Containers: 1
Images: 21
Server Version: 1.9.1
Storage Driver: aufs
 Root Dir: /var/lib/docker/aufs
 Backing Filesystem: extfs
 Dirs: 23
 Dirperm1 Supported: false
Execution Driver: native-0.2
Logging Driver: json-file
Kernel Version: 3.13.0-71-generic
Operating System: Ubuntu 14.04.3 LTS
CPUs: 2
Total Memory: 3.861 GiB

1. overlayfs is not enabled in kernel
2. devmapper works fine in loop mode. But loop mode is slow and could not be run in production.
3. devmapper in lvm mode works fine.

We should change storage driver to more reliable.