% 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