| DOCKER(1) | DOCKER(1) |
docker-system-info - Display system-wide information
docker system info [OPTIONS]
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.
Here is a sample output for a daemon running on Ubuntu, using the overlay2 storage driver:
$ docker -D info Containers: 14
Running: 3
Paused: 1
Stopped: 10 Images: 52 Server Version: 1.13.0 Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: false Logging Driver: json-file Cgroup Driver: cgroupfs Plugins:
Volume: local
Network: bridge host macvlan null overlay Swarm: active
NodeID: rdjq45w1op418waxlairloqbm
Is Manager: true
ClusterID: te8kdyw33n36fqiz74bfjeixd
Managers: 1
Nodes: 2
Orchestration:
Task History Retention Limit: 5
Raft:
Snapshot Interval: 10000
Number of Old Snapshots to Retain: 0
Heartbeat Tick: 1
Election Tick: 3
Dispatcher:
Heartbeat Period: 5 seconds
CA Configuration:
Expiry Duration: 3 months
Node Address: 172.16.66.128 172.16.66.129
Manager Addresses:
172.16.66.128:2477 Runtimes: runc Default Runtime: runc Init Binary: docker-init containerd version: 8517738ba4b82aff5662c97ca4627e7e4d03b531 runc version: ac031b5bf1cc92239461125f4c1ffb760522bbf2 init version: N/A (expected: v0.13.0) Security Options:
apparmor
seccomp
Profile: default Kernel Version: 4.4.0-31-generic Operating System: Ubuntu 16.04.1 LTS OSType: linux Architecture: x86_64 CPUs: 2 Total Memory: 1.937 GiB Name: ubuntu ID: H52R:7ZR6:EIIA:76JG:ORIY:BVKF:GSFU:HNPG:B5MK:APSC:SZ3Q:N326 Docker Root Dir: /var/lib/docker Debug Mode (client): true Debug Mode (server): true
File Descriptors: 30
Goroutines: 123
System Time: 2016-11-12T17:24:37.955404361-08:00
EventsListeners: 0 Http Proxy: http://test:test@proxy.example.com:8080 Https Proxy: https://test:test@proxy.example.com:8080 No Proxy: localhost,127.0.0.1,docker-registry.somecorporation.com Registry: https://index.docker.io/v1/ WARNING: No swap limit support Labels:
storage=ssd
staging=true Experimental: false Insecure Registries:
127.0.0.0/8 Registry Mirrors:
http://192.168.1.2/
http://registry-mirror.example.com:5000/ Live Restore Enabled: false
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: gordontheturtle 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, ...}
-f, --format=""
Format the output using the given Go template
-h, --help[=false]
help for info
| Feb 2021 | Docker Community |