Docker 1.8pre on btrfs with RHEL7 kernel

gistfile1.txt

[root@tpad-rh7 btrt]# docker build .
Sending build context to Docker daemon 2.048 kB
Sending build context to Docker daemon 
Step 0 : FROM ubuntu:14.04
 ---> 8251da35e7a7
Step 1 : RUN echo deb http://ppa.launchpad.net/zfs-native/stable/ubuntu trusty main > /etc/apt/sources.list.d/zfs.list
 ---> Running in 9abf6fdbe269
 ---> ccd977ffd4f5
Removing intermediate container 9abf6fdbe269
Step 2 : RUN ls -l /etc/apt/sources.list.d/zfs.list; cat /etc/apt/sources.list.d/zfs.list
 ---> Running in c6f7fec07330
ls: cannot access /etc/apt/sources.list.d/zfs.list: No such file or directory
cat: /etc/apt/sources.list.d/zfs.list: No such file or directory
INFO[0000] The command '/bin/sh -c ls -l /etc/apt/sources.list.d/zfs.list; cat /etc/apt/sources.list.d/zfs.list' returned a non-zero code: 1 

[root@tpad-rh7 btrt]# docker info
Containers: 1
Images: 5
Storage Driver: btrfs
Execution Driver: native-0.2
Kernel Version: 3.10.0-123.1.2.vz7.5.29
Operating System: CloudLinux 7.1 (Vladimir Komarov)
CPUs: 4
Total Memory: 3.699 GiB
Name: tpad-rh7
ID: 42ZR:DOQN:57ZB:GAEI:YR7W:IJVH:OSUJ:EBLJ:4TEP:WHTD:RVCJ:KHT2
Http Proxy: 
Https Proxy: 
No Proxy: 
[root@tpad-rh7 btrt]# docker version
Client version: 1.6.2.el7
Client API version: 1.18
Go version (client): go1.4.2
Git commit (client): c3ca5bb/1.6.2
OS/Arch (client): linux/amd64
Server version: 1.8.0-dev
Server API version: 1.21
Go version (server): go1.4.2
Git commit (server): beab255-dirty
OS/Arch (server): linux/amd64