Docker check version

Hi, today I would like to show you how to check docker version from command line.

Quick solution:

$ docker -v

Practical example:

[root@localhost]# docker -v
Docker version 19.03.13, build 4484c46d9d

Docker version with all details

In order to see all details of docker version, we can use below commnad:

$ docker version

Practical example:

[root@localhost]# docker version
Client: Docker Engine - Community
 Version:           19.03.13
 API version:       1.40
 Go version:        go1.13.15
 Git commit:        4484c46d9d
 Built:             Wed Sep 16 17:03:45 2020
 OS/Arch:           linux/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.13
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       4484c46d9d
  Built:            Wed Sep 16 17:02:21 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.3.7
  GitCommit:        8fba4e9a7d01810a393d5d25a3621dc101981175
 runc:
  Version:          1.0.0-rc10
  GitCommit:        dc9208a3303feef5b3839f4323d9beb36df0a9dd
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683

Docker print only server version

Sometimes we just need to get only docker version:

$ docker version --format '{{.Server.Version}}'

It is useful when we create some automation and we need to ensure docker version is above some version.

Practical example:

[root@localhost]# docker version --format '{{.Server.Version}}'
19.03.13

Docker version print JSON

To show docker version in JSON format we can use:

$ docker version --format '{{json .}}'

Practical example:

[root@localhost]# docker version --format '{{json .}}'
{"Client":{"Platform":{"Name":"Docker Engine - Community"},"Version":"19.03.13","ApiVersion":"1.40","DefaultAPIVersion":"1.40","GitCommit":"4484c46d9d","GoVersion":"go1.13.15","Os":"linux","Arch":"amd64","BuildTime":"Wed Sep 16 17:03:45 2020","Experimental":false},"Server":{"Platform":{"Name":"Docker Engine - Community"},"Components":[{"Name":"Engine","Version":"19.03.13","Details":{"ApiVersion":"1.40","Arch":"amd64","BuildTime":"Wed Sep 16 17:02:21 2020","Experimental":"false","GitCommit":"4484c46d9d","GoVersion":"go1.13.15","KernelVersion":"3.10.0-693.el7.x86_64","MinAPIVersion":"1.12","Os":"linux"}},{"Name":"containerd","Version":"1.3.7","Details":{"GitCommit":"8fba4e9a7d01810a393d5d25a3621dc101981175"}},{"Name":"runc","Version":"1.0.0-rc10","Details":{"GitCommit":"dc9208a3303feef5b3839f4323d9beb36df0a9dd"}},{"Name":"docker-init","Version":"0.18.0","Details":{"GitCommit":"fec3683"}}],"Version":"19.03.13","ApiVersion":"1.40","MinAPIVersion":"1.12","GitCommit":"4484c46d9d","GoVersion":"go1.13.15","Os":"linux","Arch":"amd64","KernelVersion":"3.10.0-693.el7.x86_64","BuildTime":"2020-09-16T17:02:21.000000000+00:00"}}

If we want to print docker version json pretty formatted we can use python -m json.tool, command:

$ docker version --format '{{json .}}' | python -m json.tool

Docker version in json - pretty formatted:

[root@localhost]# docker version --format '{{json .}}' | python -m json.tool
{
    "Client": {
        "ApiVersion": "1.40",
        "Arch": "amd64",
        "BuildTime": "Wed Sep 16 17:03:45 2020",
        "DefaultAPIVersion": "1.40",
        "Experimental": false,
        "GitCommit": "4484c46d9d",
        "GoVersion": "go1.13.15",
        "Os": "linux",
        "Platform": {
            "Name": "Docker Engine - Community"
        },
        "Version": "19.03.13"
    },
    "Server": {
        "ApiVersion": "1.40",
        "Arch": "amd64",
        "BuildTime": "2020-09-16T17:02:21.000000000+00:00",
        "Components": [
            {
                "Details": {
                    "ApiVersion": "1.40",
                    "Arch": "amd64",
                    "BuildTime": "Wed Sep 16 17:02:21 2020",
                    "Experimental": "false",
                    "GitCommit": "4484c46d9d",
                    "GoVersion": "go1.13.15",
                    "KernelVersion": "3.10.0-693.el7.x86_64",
                    "MinAPIVersion": "1.12",
                    "Os": "linux"
                },
                "Name": "Engine",
                "Version": "19.03.13"
            },
            {
                "Details": {
                    "GitCommit": "8fba4e9a7d01810a393d5d25a3621dc101981175"
                },
                "Name": "containerd",
                "Version": "1.3.7"
            },
            {
                "Details": {
                    "GitCommit": "dc9208a3303feef5b3839f4323d9beb36df0a9dd"
                },
                "Name": "runc",
                "Version": "1.0.0-rc10"
            },
            {
                "Details": {
                    "GitCommit": "fec3683"
                },
                "Name": "docker-init",
                "Version": "0.18.0"
            }
        ],
        "GitCommit": "4484c46d9d",
        "GoVersion": "go1.13.15",
        "KernelVersion": "3.10.0-693.el7.x86_64",
        "MinAPIVersion": "1.12",
        "Os": "linux",
        "Platform": {
            "Name": "Docker Engine - Community"
        },
        "Version": "19.03.13"
    }
}

Docker version print help

If we want to print help for docker version:

$ docker version --help

Practical example:

[root@localhost]# docker version --help

Usage:  docker version [OPTIONS]

Show the Docker version information

Options:
  -f, --format string       Format the output using the given Go template
      --kubeconfig string   Kubernetes config file

References

• https://docs.docker.com/engine/reference/commandline/version/