Docker device-mapper Storage Backend: Difference between revisions

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Device-mapper driver metadata is stored in /var/lib/docker/devicemapper/metadata. Docker state can be reset by stopping docker and by removing /var/lib/docker/devicemapper/metadata directory. This will destroy existing docker images and containers and all the docker metadata.
Device-mapper driver metadata is stored in /var/lib/docker/devicemapper/metadata. Docker state can be reset by stopping docker and by removing /var/lib/docker/devicemapper/metadata directory. This will destroy existing docker images and containers and all the docker metadata.
=Info=
docker info
Storage Driver: devicemapper
  Pool Name: docker_vg-container--thinpool
  Pool Blocksize: 524.3 kB
  Base Device Size: 10.74 GB
  Backing Filesystem: xfs
  Data file:
  Metadata file:
  Data Space Used: 16.81 GB
  Data Space Total: 53.57 GB
  Data Space Available: 36.76 GB
  Metadata Space Used: 3.338 MB
  Metadata Space Total: 54.53 MB
  Metadata Space Available: 51.19 MB
  Thin Pool Minimum Free Space: 5.357 GB
  Udev Sync Supported: true
  Deferred Removal Enabled: true
  Deferred Deletion Enabled: true
  Deferred Deleted Device Count: 0
  Library Version: 1.02.140-RHEL7 (2017-05-03)
  ...

Revision as of 17:41, 13 February 2018

External

Internal

Overview

Device-mapper driver metadata is stored in /var/lib/docker/devicemapper/metadata. Docker state can be reset by stopping docker and by removing /var/lib/docker/devicemapper/metadata directory. This will destroy existing docker images and containers and all the docker metadata.

Info

docker info
Storage Driver: devicemapper
 Pool Name: docker_vg-container--thinpool
 Pool Blocksize: 524.3 kB
 Base Device Size: 10.74 GB
 Backing Filesystem: xfs
 Data file:
 Metadata file:
 Data Space Used: 16.81 GB
 Data Space Total: 53.57 GB
 Data Space Available: 36.76 GB
 Metadata Space Used: 3.338 MB
 Metadata Space Total: 54.53 MB
 Metadata Space Available: 51.19 MB
 Thin Pool Minimum Free Space: 5.357 GB
 Udev Sync Supported: true
 Deferred Removal Enabled: true
 Deferred Deletion Enabled: true
 Deferred Deleted Device Count: 0
 Library Version: 1.02.140-RHEL7 (2017-05-03)
 ...