% DOCKER(1) Docker User Manuals % William Henry % APRIL 2014 # NAME docker-inspect - Return low-level information on a container/image # SYNOPSIS **docker inspect** [**-f**|**--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 **-f**, **--format**="" The text/template package of Go describes all the details of the format. See examples section # EXAMPLES ## Getting information on a container To get information on a container use it's ID or instance name: #docker inspect 1eb5fabf5a03 [{ "ID": "1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b", "Created": "2014-04-04T21:33:52.02361335Z", "Path": "/usr/sbin/nginx", "Args": [], "Config": { "Hostname": "1eb5fabf5a03", "Domainname": "", "User": "", "Memory": 0, "MemorySwap": 0, "CpuShares": 0, "AttachStdin": false, "AttachStdout": false, "AttachStderr": false, "PortSpecs": null, "ExposedPorts": { "80/tcp": {} }, "Tty": true, "OpenStdin": false, "StdinOnce": false, "Env": [ "HOME=/", "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" ], "Cmd": [ "/usr/sbin/nginx" ], "Dns": null, "DnsSearch": null, "Image": "summit/nginx", "Volumes": null, "VolumesFrom": "", "WorkingDir": "", "Entrypoint": null, "NetworkDisabled": false, "OnBuild": null, "Context": { "mount_label": "system_u:object_r:svirt_sandbox_file_t:s0:c0,c650", "process_label": "system_u:system_r:svirt_lxc_net_t:s0:c0,c650" } }, "State": { "Running": true, "Pid": 858, "ExitCode": 0, "StartedAt": "2014-04-04T21:33:54.16259207Z", "FinishedAt": "0001-01-01T00:00:00Z", "Ghost": false }, "Image": "df53773a4390e25936f9fd3739e0c0e60a62d024ea7b669282b27e65ae8458e6", "NetworkSettings": { "IPAddress": "172.17.0.2", "IPPrefixLen": 16, "Gateway": "172.17.42.1", "Bridge": "docker0", "PortMapping": null, "Ports": { "80/tcp": [ { "HostIp": "0.0.0.0", "HostPort": "80" } ] } }, "ResolvConfPath": "/etc/resolv.conf", "HostnamePath": "/var/lib/docker/containers/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b/hostname", "HostsPath": "/var/lib/docker/containers/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b/hosts", "Name": "/ecstatic_ptolemy", "Driver": "devicemapper", "ExecDriver": "native-0.1", "Volumes": {}, "VolumesRW": {}, "HostConfig": { "Binds": null, "ContainerIDFile": "", "LxcConf": [], "Privileged": false, "PortBindings": { "80/tcp": [ { "HostIp": "0.0.0.0", "HostPort": "80" } ] }, "Links": null, "PublishAllPorts": false, "DriverOptions": { "lxc": null }, "CliAddress": "" } ## 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 ## Getting information on an image Use an image's ID or name (e.g. repository/name[:tag]) to get information on it. # docker inspect 58394af37342 [{ "id": "58394af373423902a1b97f209a31e3777932d9321ef10e64feaaa7b4df609cf9", "parent": "8abc22bad04266308ff408ca61cb8f6f4244a59308f7efc64e54b08b496c58db", "created": "2014-02-03T16:10:40.500814677Z", "container": "f718f19a28a5147da49313c54620306243734bafa63c76942ef6f8c4b4113bc5", "container_config": { "Hostname": "88807319f25e", "Domainname": "", "User": "", "Memory": 0, "MemorySwap": 0, "CpuShares": 0, "AttachStdin": false, "AttachStdout": false, "AttachStderr": false, "PortSpecs": null, "ExposedPorts": null, "Tty": false, "OpenStdin": false, "StdinOnce": false, "Env": [ "HOME=/", "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" ], "Cmd": [ "/bin/sh", "-c", "#(nop) ADD fedora-20-dummy.tar.xz in /" ], "Dns": null, "DnsSearch": null, "Image": "8abc22bad04266308ff408ca61cb8f6f4244a59308f7efc64e54b08b496c58db", "Volumes": null, "VolumesFrom": "", "WorkingDir": "", "Entrypoint": null, "NetworkDisabled": false, "OnBuild": null, "Context": null }, "docker_version": "0.6.3", "author": "I P Babble \u003clsm5@ipbabble.com\u003e - ./buildcontainers.sh", "config": { "Hostname": "88807319f25e", "Domainname": "", "User": "", "Memory": 0, "MemorySwap": 0, "CpuShares": 0, "AttachStdin": false, "AttachStdout": false, "AttachStderr": false, "PortSpecs": null, "ExposedPorts": null, "Tty": false, "OpenStdin": false, "StdinOnce": false, "Env": [ "HOME=/", "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" ], "Cmd": null, "Dns": null, "DnsSearch": null, "Image": "8abc22bad04266308ff408ca61cb8f6f4244a59308f7efc64e54b08b496c58db", "Volumes": null, "VolumesFrom": "", "WorkingDir": "", "Entrypoint": null, "NetworkDisabled": false, "OnBuild": null, "Context": null }, "architecture": "x86_64", "Size": 385520098 }] # HISTORY April 2014, Originally compiled by William Henry (whenry at redhat dot com) based on docker.io source material and internal work.