4.9 KiB
% DOCKER(1) Docker User Manuals % Docker Community % JUNE 2014
NAME
docker-info - Display system-wide information
SYNOPSIS
docker info [--help] [-f|--format[=FORMAT]]
DESCRIPTION
This command displays system wide information regarding the Docker installation. Information displayed includes the kernel version, number of containers and images. The number of images shown is the number of unique images. The same image tagged under different names is counted only once.
If a format is specified, the given template will be executed instead of the default format. Go's text/template package describes all the details of the format.
Depending on the storage driver in use, additional information can be shown, such as pool name, data file, metadata file, data space used, total data space, metadata space used, and total metadata space.
The data file is where the images are stored and the metadata file is where the
meta data regarding those images are stored. When run for the first time Docker
allocates a certain amount of data space and meta data space from the space
available on the volume where /var/lib/docker is mounted.
OPTIONS
--help Print usage statement
-f, --format="" Format the output using the given Go template
EXAMPLES
Display Docker system information
Here is a sample output for a daemon running on Ubuntu, using the overlay storage driver:
$ docker -D info
Containers: 14
Running: 3
Paused: 1
Stopped: 10
Images: 52
Server Version: 1.12.0-dev
Storage Driver: overlay
Backing Filesystem: extfs
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge null host overlay
Swarm:
NodeID: 0gac67oclbxq7
IsManager: YES
Managers: 2
Nodes: 2
Runtimes: default
Default Runtime: default
Security Options: apparmor seccomp
Kernel Version: 4.4.0-21-generic
Operating System: Ubuntu 16.04 LTS
OSType: linux
Architecture: x86_64
CPUs: 24
Total Memory: 62.86 GiB
Name: docker
ID: I54V:OLXT:HVMM:TPKO:JPHQ:CQCD:JNLC:O3BZ:4ZVJ:43XJ:PFHZ:6N2S
Docker Root Dir: /var/lib/docker
Debug mode (client): true
Debug mode (server): true
File Descriptors: 59
Goroutines: 159
System Time: 2016-04-26T10:04:06.14689342-04:00
EventsListeners: 0
Http Proxy: http://test:test@localhost:8080
Https Proxy: https://test:test@localhost:8080
No Proxy: localhost,127.0.0.1,docker-registry.somecorporation.com
Username: svendowideit
Registry: https://index.docker.io/v1/
WARNING: No swap limit support
Labels:
storage=ssd
staging=true
Insecure registries:
myinsecurehost:5000
127.0.0.0/8
The global -D option tells all docker commands to output debug information.
The example below shows the output for a daemon running on Red Hat Enterprise Linux, using the devicemapper storage driver. As can be seen in the output, additional information about the devicemapper storage driver is shown:
$ docker info
Containers: 14
Running: 3
Paused: 1
Stopped: 10
Untagged Images: 52
Server Version: 1.10.3
Storage Driver: devicemapper
Pool Name: docker-202:2-25583803-pool
Pool Blocksize: 65.54 kB
Base Device Size: 10.74 GB
Backing Filesystem: xfs
Data file: /dev/loop0
Metadata file: /dev/loop1
Data Space Used: 1.68 GB
Data Space Total: 107.4 GB
Data Space Available: 7.548 GB
Metadata Space Used: 2.322 MB
Metadata Space Total: 2.147 GB
Metadata Space Available: 2.145 GB
Udev Sync Supported: true
Deferred Removal Enabled: false
Deferred Deletion Enabled: false
Deferred Deleted Device Count: 0
Data loop file: /var/lib/docker/devicemapper/devicemapper/data
Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
Library Version: 1.02.107-RHEL7 (2015-12-01)
Execution Driver: native-0.2
Logging Driver: json-file
Plugins:
Volume: local
Network: null host bridge
Kernel Version: 3.10.0-327.el7.x86_64
Operating System: Red Hat Enterprise Linux Server 7.2 (Maipo)
OSType: linux
Architecture: x86_64
CPUs: 1
Total Memory: 991.7 MiB
Name: ip-172-30-0-91.ec2.internal
ID: I54V:OLXT:HVMM:TPKO:JPHQ:CQCD:JNLC:O3BZ:4ZVJ:43XJ:PFHZ:6N2S
Docker Root Dir: /var/lib/docker
Debug mode (client): false
Debug mode (server): false
Username: xyz
Registry: https://index.docker.io/v1/
Insecure registries:
myinsecurehost:5000
127.0.0.0/8
You can also specify the output format:
$ docker info --format '{{json .}}'
{"ID":"I54V:OLXT:HVMM:TPKO:JPHQ:CQCD:JNLC:O3BZ:4ZVJ:43XJ:PFHZ:6N2S","Containers":14, ...}
HISTORY
April 2014, Originally compiled by William Henry (whenry at redhat dot com) based on docker.com source material and internal work. June 2014, updated by Sven Dowideit SvenDowideit@home.org.au