/etc/default/docker

DOCKER_OPTS="--storage-driver=devicemapper --storage-opt dm.basesize=20G"

Pensez à sauvegarder, ici tous les conteneurs seront effacé !!

systemctl stop docker
rm /var/lib/docker/*
systemctl start docker

docker info

Containers: 1
Images: 18
Storage Driver: devicemapper
 Pool Name: docker-254:2-183267-pool
 Pool Blocksize: 65.54 kB
 Backing Filesystem: extfs
 Data file: /dev/loop0
 Metadata file: /dev/loop1
 Data Space Used: 1.048 GB
 Data Space Total: 107.4 GB
 Data Space Available: 10.41 GB
 Metadata Space Used: 1.696 MB
 Metadata Space Total: 2.147 GB
 Metadata Space Available: 2.146 GB
 Udev Sync Supported: true
 Data loop file: /var/lib/docker/devicemapper/devicemapper/data
 Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
 Library Version: 1.02.90 (2014-09-01)
Execution Driver: native-0.2
Kernel Version: 3.16.0-4-amd64
Operating System: Debian GNU/Linux 8 (jessie)
CPUs: 1
Total Memory: 1.963 GiB
Name: debian2.localdomain
ID: LJES:6FKX:7X2A:ZV4E:SEOG:7QIT:Z4FG:M6Y6:A5JG:ILBK:KPVR:NSNW
WARNING: No memory limit support
WARNING: No swap limit support