6.2 KiB
title | description | keywords |
---|---|---|
version | The version command description and usage | version, architecture, api |
version
Usage: docker version [OPTIONS]
Show the Docker version information
Options:
-f, --format string Format the output using the given Go template
--help Print usage
--kubeconfig string Kubernetes config file
Description
The version command prints the current version number for all independently
versioned Docker components. Use the --format
option to customize
the output.
The version command (docker version
) outputs the version numbers of Docker
components, while the --version
flag (docker --version
) outputs the version
number of the Docker CLI you are using.
Default output
The default output renders all version information divided into two sections; the "Client" section contains information about the Docker CLI and client components, and the "Server" section contains information about the Docker Engine and components used by the Engine, such as the "Containerd" and "Runc" OCI Runtimes.
The information shown may differ depending on how you installed Docker and what components are in use. The following example shows the output on a macOS machine running Docker Desktop:
$ docker version
Client:
Version: 20.10.16
API version: 1.41
Go version: go1.17.10
Git commit: aa7e414
Built: Thu May 12 09:17:28 2022
OS/Arch: darwin/amd64
Context: default
Server: Docker Desktop 4.8.2 (77141)
Engine:
Version: 20.10.16
API version: 1.41 (minimum version 1.12)
Go version: go1.17.10
Git commit: f756502
Built: Thu May 12 09:15:33 2022
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.6.4
GitCommit: 212e8b6fa2f44b9c21b2798135fc6fb7c53efc16
runc:
Version: 1.1.1
GitCommit: v1.1.1-0-g52de29d
docker-init:
Version: 0.19.0
GitCommit: de40ad0
Client and server versions
Docker uses a client/server architecture, which allows you to use the Docker CLI on your local machine to control a Docker Engine running on a remote machine, which can be (for example) a machine running in the Cloud or inside a Virtual Machine.
The following example switches the Docker CLI to use a context named "remote-test-server", which runs an older version of the Docker Engine on a Linux server:
$ docker context use remote-test-server
remote-test-server
$ docker version
Client:
Version: 20.10.16
API version: 1.40 (downgraded from 1.41)
Go version: go1.17.10
Git commit: aa7e414
Built: Thu May 12 09:17:28 2022
OS/Arch: darwin/amd64
Context: remote-test-server
Server: Docker Engine - Community
Engine:
Version: 19.03.8
API version: 1.40 (minimum version 1.12)
Go version: go1.12.17
Git commit: afacb8b
Built: Wed Mar 11 01:29:16 2020
OS/Arch: linux/amd64
containerd:
Version: v1.2.13
GitCommit: 7ad184331fa3e55e52b890ea95e65ba581ae3429
runc:
Version: 1.0.0-rc10
GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd
docker-init:
Version: 0.18.0
GitCommit: fec3683
Examples
Format the output (--format)
The formatting option (--format
) pretty-prints the output using a Go template,
which allows you to customize the output format, or to obtain specific information
from the output. Refer to the format command and log output
page for details of the format.
Get the server version
$ docker version --format '{{.Server.Version}}'
20.10.16
Dump raw JSON data
$ docker version --format '{{json .}}'
{"Client":{"Platform":{"Name":"Docker Engine - Community"},"Version":"19.03.8","ApiVersion":"1.40","DefaultAPIVersion":"1.40","GitCommit":"afacb8b","GoVersion":"go1.12.17","Os":"darwin","Arch":"amd64","BuildTime":"Wed Mar 11 01:21:11 2020","Experimental":true},"Server":{"Platform":{"Name":"Docker Engine - Community"},"Components":[{"Name":"Engine","Version":"19.03.8","Details":{"ApiVersion":"1.40","Arch":"amd64","BuildTime":"Wed Mar 11 01:29:16 2020","Experimental":"true","GitCommit":"afacb8b","GoVersion":"go1.12.17","KernelVersion":"4.19.76-linuxkit","MinAPIVersion":"1.12","Os":"linux"}},{"Name":"containerd","Version":"v1.2.13","Details":{"GitCommit":"7ad184331fa3e55e52b890ea95e65ba581ae3429"}},{"Name":"runc","Version":"1.0.0-rc10","Details":{"GitCommit":"dc9208a3303feef5b3839f4323d9beb36df0a9dd"}},{"Name":"docker-init","Version":"0.18.0","Details":{"GitCommit":"fec3683"}}],"Version":"19.03.8","ApiVersion":"1.40","MinAPIVersion":"1.12","GitCommit":"afacb8b","GoVersion":"go1.12.17","Os":"linux","Arch":"amd64","KernelVersion":"4.19.76-linuxkit","Experimental":true,"BuildTime":"2020-03-11T01:29:16.000000000+00:00"}}
Print the current context
The following example prints the currently used docker context
:
$ docker version --format='{{.Client.Context}}'
default
As an example, this output can be used to dynamically change your shell prompt to indicate your active context. The example below illustrates how this output could be used when using Bash as your shell.
Declare a function to obtain the current context in your ~/.bashrc
, and set
this command as your PROMPT_COMMAND
function docker_context_prompt() {
PS1="context: $(docker version --format='{{.Client.Context}}')> "
}
PROMPT_COMMAND=docker_context_prompt
After reloading the ~/.bashrc
, the prompt now shows the currently selected
docker context
:
$ source ~/.bashrc
context: default> docker context create --docker host=unix:///var/run/docker.sock my-context
my-context
Successfully created context "my-context"
context: default> docker context use my-context
my-context
Current context is now "my-context"
context: my-context> docker context use default
default
Current context is now "default"
context: default>
Refer to the docker context
section in the command line reference
for more information about docker context
.