Increase container volume(disk) size

dvohra · May 27, 2016, 10:37am

–storage-driver=devicemapper --storage-opt dm.basesize=20G

snitm/docker/blob/master/daemon/graphdriver/devmapper/README.md

## devicemapper - a storage backend based on Device Mapper

### Theory of operation

The device mapper graphdriver uses the device mapper thin provisioning
module (dm-thinp) to implement CoW snapshots. For each devicemapper
graph location (typically `/var/lib/docker/devicemapper`, $graph below)
a thin pool is created based on two block devices, one for data and
one for metadata.  By default these block devices are created
automatically by using loopback mounts of automatically creates sparse
files.

The default loopback files used are `$graph/devicemapper/data` and
`$graph/devicemapper/metadata`. Additional metadata required to map
from docker entities to the corresponding devicemapper volumes is
stored in the `$graph/devicemapper/json` file (encoded as Json).

In order to support multiple devicemapper graphs on a system the thin
pool will be named something like: `docker-0:33-19478248-pool`, where
the `0:30` part is the minor/major device nr and `19478248` is the

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Increase container volume(disk) size

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