moby/man/docker-inspect.1.md

% DOCKER(1) Docker User Manuals % Docker Community % JUNE 2014

NAME

docker-inspect - Return low-level information on a container or image

SYNOPSIS

docker inspect [--help] [-f|--format[=FORMAT]] CONTAINER|IMAGE [CONTAINER|IMAGE...]

DESCRIPTION

This displays all the information available in Docker for a given container or image. By default, this will render all results in a JSON array. If a format is specified, the given template will be executed for each result.

OPTIONS

--help Print usage statement

-f, --format="" Format the output using the given go template.

EXAMPLES

Getting information on a container

To get information on a container use its ID or instance name:

$ docker inspect 1eb5fabf5a03
[{
    "AppArmorProfile": "",
    "Args": [],
    "Config": {
        "AttachStderr": false,
        "AttachStdin": false,
        "AttachStdout": false,
        "Cmd": [
            "/usr/sbin/nginx"
        ],
        "Domainname": "",
        "Entrypoint": null,
        "Env": [
            "HOME=/",
            "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
        ],
        "ExposedPorts": {
            "80/tcp": {}
        },
        "Hostname": "1eb5fabf5a03",
        "Image": "summit/nginx",
        "Labels": {
            "com.example.vendor": "Acme",
            "com.example.license": "GPL",
            "com.example.version": "1.0"
        },
        "MacAddress": "",
        "NetworkDisabled": false,
        "OnBuild": null,
        "OpenStdin": false,
        "StdinOnce": false,
        "Tty": true,
        "User": "",
        "Volumes": null,
        "WorkingDir": "",
    },
    "Created": "2014-04-04T21:33:52.02361335Z",
    "Driver": "devicemapper",
    "ExecDriver": "native-0.1",
    "ExecIDs": null,
    "HostConfig": {
        "Binds": null,
        "CapAdd": null,
        "CapDrop": null,
        "CgroupParent": "",
        "ContainerIDFile": "",
        "CpuShares": 512,
        "CpusetCpus": "0,1",
        "CpusetMems": "",
        "Devices": [],
        "Dns": null,
        "DnsSearch": null,
        "ExtraHosts": null,
        "IpcMode": "",
        "Links": null,
        "LogConfig": {
            "Config": null,
            "Type": "json-file"
        },
        "LxcConf": null,
        "Memory": 16777216,
        "MemorySwap": -1,
        "NetworkMode": "",
        "PidMode": "",
        "PortBindings": {
            "80/tcp": [
                {
                    "HostIp": "0.0.0.0",
                    "HostPort": "80"
                }
            ]
        },
        "Privileged": false,
        "PublishAllPorts": false,
        "ReadonlyRootfs": false,
        "RestartPolicy": {
            "MaximumRetryCount": 0,
            "Name": ""
        },
        "SecurityOpt": null,
        "Ulimits": null,
        "VolumesFrom": null
    }
    "HostnamePath": "/var/lib/docker/containers/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b/hostname",
    "HostsPath": "/var/lib/docker/containers/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b/hosts",
    "ID": "1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b",
    "Image": "df53773a4390e25936f9fd3739e0c0e60a62d024ea7b669282b27e65ae8458e6",
    "LogPath": "/var/lib/docker/containers/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b-json.log",
    "MountLabel": "",
    "Name": "/ecstatic_ptolemy",
    "NetworkSettings": {
        "Bridge": "docker0",
        "Gateway": "172.17.42.1",
        "GlobalIPv6Address": "",
        "GlobalIPv6PrefixLen": 0,
        "IPAddress": "172.17.0.2",
        "IPPrefixLen": 16,
        "IPv6Gateway": "",
        "LinkLocalIPv6Address": "",
        "LinkLocalIPv6PrefixLen": 0,
        "MacAddress": "",
        "PortMapping": null,
        "Ports": {
            "80/tcp": [
                {
                    "HostIp": "0.0.0.0",
                    "HostPort": "80"
                }
            ]
        }
    },
    "Path": "/usr/sbin/nginx",
    "ProcessLabel": "",
    "ResolvConfPath": "/etc/resolv.conf",
    "RestartCount": 0,
    "State": {
        "Dead": false,
        "Error": "",
        "ExitCode": 0,
        "FinishedAt": "0001-01-01T00:00:00Z",
        "OOMKilled": false,
        "Paused": false,
        "Pid": 858,
        "Restarting": false,
        "Running": true,
        "StartedAt": "2014-04-04T21:33:54.16259207Z",
    },
    "Volumes": {},
    "VolumesRW": {},
}

Getting the IP address of a container instance

To get the IP address of a container use:

$ docker inspect --format='{{.NetworkSettings.IPAddress}}' 1eb5fabf5a03
172.17.0.2

Listing all port bindings

One can loop over arrays and maps in the results to produce simple text output:

$ docker inspect --format='{{range $p, $conf := .NetworkSettings.Ports}} \
  {{$p}} -> {{(index $conf 0).HostPort}} {{end}}' 1eb5fabf5a03
  80/tcp -> 80

You can get more information about how to write a go template from: http://golang.org/pkg/text/template/.

Getting information on an image

Use an image's ID or name (e.g., repository/name[:tag]) to get information on it.

$ docker inspect fc1203419df2
[{
    "Architecture": "amd64",
    "Author": "",
    "Comment": "",
    "Config": {
        "AttachStderr": false,
        "AttachStdin": false,
        "AttachStdout": false,
        "Cmd": [
            "make",
            "direct-test"
        ],
        "Domainname": "",
        "Entrypoint": [
            "/dind"
        ],
        "Env": [
            "PATH=/go/bin:/usr/src/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
        ],
        "ExposedPorts": null,
        "Hostname": "242978536a06",
        "Image": "c2b774c744afc5bea603b5e6c5218539e506649326de3ea0135182f299d0519a",
        "Labels": {},
        "MacAddress": "",
        "NetworkDisabled": false,
        "OnBuild": [],
        "OpenStdin": false,
        "StdinOnce": false,
        "Tty": false,
        "User": "",
        "Volumes": null,
        "WorkingDir": "/go/src/github.com/docker/libcontainer"
    },
    "Container": "1c00417f3812a96d3ebc29e7fdee69f3d586d703ab89c8233fd4678d50707b39",
    "ContainerConfig": {
        "AttachStderr": false,
        "AttachStdin": false,
        "AttachStdout": false,
        "Cmd": [
            "/bin/sh",
            "-c",
            "#(nop) CMD [\"make\" \"direct-test\"]"
        ],
        "Domainname": "",
        "Entrypoint": [
            "/dind"
        ],
        "Env": [
            "PATH=/go/bin:/usr/src/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
        ],
        "ExposedPorts": null,
        "Hostname": "242978536a06",
        "Image": "c2b774c744afc5bea603b5e6c5218539e506649326de3ea0135182f299d0519a",
        "Labels": {},
        "MacAddress": "",
        "NetworkDisabled": false,
        "OnBuild": [],
        "OpenStdin": false,
        "StdinOnce": false,
        "Tty": false,
        "User": "",
        "Volumes": null,
        "WorkingDir": "/go/src/github.com/docker/libcontainer"
    },
    "Created": "2015-04-07T05:34:39.079489206Z",
    "DockerVersion": "1.5.0-dev",
    "Id": "fc1203419df26ca82cad1dd04c709cb1b8a8a947bd5bcbdfbef8241a76f031db",
    "Os": "linux",
    "Parent": "c2b774c744afc5bea603b5e6c5218539e506649326de3ea0135182f299d0519a",
    "Size": 0,
    "VirtualSize": 613136466
}]

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 April 2015, updated by Qiang Huang h.huangqiang@huawei.com