Where's the location to docker configuration file?

I've tried modifying /etc/sysconfig/docker with options:

DOCKER_OPTS="-s aufs --fixed-cidr= --bip="

docker info shows

Containers: 0
Images: 0
Storage Driver: devicemapper
 Pool Name: docker-253:1-2149483840-pool
 Pool Blocksize: 65.54 kB
 Data file: /mnt/ext4/docker/devicemapper/devicemapper/data
 Metadata file: /mnt/ext4/docker/devicemapper/devicemapper/metadata
 Data Space Used: 307.2 MB
 Data Space Total: 107.4 GB
 Metadata Space Used: 733.2 kB
 Metadata Space Total: 2.147 GB
 Library Version: 1.02.82-git (2013-10-04)
Execution Driver: native-0.2
Kernel Version: 3.10.0-123.el7.x86_64
Operating System: CentOS Linux 7 (Core)

How can I make Storage Driver: aufs? Please help. Thanks

  • 1
    You don't. (And you don't want to use aufs.) Just use devicemapper. But set it up for real instead of these testing-grade loopback files. Dec 9, 2014 at 12:38
  • device mappers are limited to 10gb, i've set up with btrfs to remove the limitations but i check that btrfs is slower than aufs and overlayfs so i think i'll go with ubuntu host and centos container
    – stashfree
    Dec 11, 2014 at 16:24
  • 2
    devicemapper is not limited to 10GB. I have no idea how you got that idea. And Ubuntu is not a very good platform for Docker overall...or anything else. Dec 11, 2014 at 17:08

1 Answer 1


You'll need to install a kernel that supports AUFS.

I maintain one here: https://github.com/bnied/rhel-aufs-kernel


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.