22 KiB
page_title: Remote API v1.0 page_description: API Documentation for Docker page_keywords: API, Docker, rcli, REST, documentation
Docker Remote API v1.0
1. Brief introduction
- The Remote API is replacing rcli
- Default port in the docker daemon is 2375
- The API tends to be REST, but for some complex commands, like attach or pull, the HTTP connection is hijacked to transport stdout stdin and stderr
2. Endpoints
2.1 Containers
List containers
GET /containers/json
List containers
Example request:
GET /containers/json?all=1&before=8dfafdbc3a40 HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
[
{
"Id": "8dfafdbc3a40",
"Image": "ubuntu:latest",
"Command": "echo 1",
"Created": 1367854155,
"Status": "Exit 0"
},
{
"Id": "9cd87474be90",
"Image": "ubuntu:latest",
"Command": "echo 222222",
"Created": 1367854155,
"Status": "Exit 0"
},
{
"Id": "3176a2479c92",
"Image": "centos:latest",
"Command": "echo 3333333333333333",
"Created": 1367854154,
"Status": "Exit 0"
},
{
"Id": "4cb07b47f9fb",
"Image": "fedora:latest",
"Command": "echo 444444444444444444444444444444444",
"Created": 1367854152,
"Status": "Exit 0"
}
]
Query Parameters:
- all – 1/True/true or 0/False/false, Show all containers. Only running containers are shown by default
- limit – Show
limitlast created containers, include non-running ones. - since – Show only containers created since Id, include non-running ones.
- before – Show only containers created before Id, include non-running ones.
Status Codes:
- 200 – no error
- 400 – bad parameter
- 500 – server error
Create a container
POST /containers/create
Create a container
Example request:
POST /containers/create HTTP/1.1
Content-Type: application/json
{
"Hostname":"",
"User":"",
"Memory":0,
"MemorySwap":0,
"AttachStdin":false,
"AttachStdout":true,
"AttachStderr":true,
"PortSpecs":null,
"Tty":false,
"OpenStdin":false,
"StdinOnce":false,
"Env":null,
"Cmd":[
"date"
],
"Dns":null,
"Image":"ubuntu",
"Volumes":{},
"VolumesFrom":""
}
Example response:
HTTP/1.1 201 Created
Content-Type: application/json
{
"Id":"e90e34656806"
"Warnings":[]
}
Json Parameters:
- config – the container's configuration
Status Codes:
- 201 – no error
- 404 – no such container
- 406 – impossible to attach (container not running)
- 500 – server error
Inspect a container
GET /containers/(id)/json
Return low-level information on the container id
Example request:
GET /containers/4fa6e0f0c678/json HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Id": "4fa6e0f0c6786287e131c3852c58a2e01cc697a68231826813597e4994f1d6e2",
"Created": "2013-05-07T14:51:42.041847+02:00",
"Path": "date",
"Args": [],
"Config": {
"Hostname": "4fa6e0f0c678",
"User": "",
"Memory": 0,
"MemorySwap": 0,
"AttachStdin": false,
"AttachStdout": true,
"AttachStderr": true,
"PortSpecs": null,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": null,
"Cmd": [
"date"
],
"Dns": null,
"Image": "ubuntu",
"Volumes": {},
"VolumesFrom": ""
},
"State": {
"Running": false,
"Pid": 0,
"ExitCode": 0,
"StartedAt": "2013-05-07T14:51:42.087658+02:01360",
"Ghost": false
},
"Image": "b750fe79269d2ec9a3c593ef05b4332b1d1a02a62b4accb2c21d589ff2f5f2dc",
"NetworkSettings": {
"IpAddress": "",
"IpPrefixLen": 0,
"Gateway": "",
"Bridge": "",
"PortMapping": null
},
"SysInitPath": "/home/kitty/go/src/github.com/docker/docker/bin/docker",
"ResolvConfPath": "/etc/resolv.conf",
"Volumes": {}
}
Status Codes:
- 200 – no error
- 404 – no such container
- 500 – server error
Inspect changes on a container's filesystem
GET /containers/(id)/changes
Inspect changes on container id's filesystem
Example request:
GET /containers/4fa6e0f0c678/changes HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
[
{
"Path": "/dev",
"Kind": 0
},
{
"Path": "/dev/kmsg",
"Kind": 1
},
{
"Path": "/test",
"Kind": 1
}
]
Status Codes:
- 200 – no error
- 404 – no such container
- 500 – server error
Export a container
GET /containers/(id)/export
Export the contents of container id
Example request:
GET /containers/4fa6e0f0c678/export HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/octet-stream
{{ TAR STREAM }}
Status Codes:
- 200 – no error
- 404 – no such container
- 500 – server error
Start a container
POST /containers/(id)/start
Start the container id
Example request:
POST /containers/e90e34656806/start HTTP/1.1
Example response:
HTTP/1.1 200 OK
Status Codes:
- 200 – no error
- 404 – no such container
- 500 – server error
Stop a container
POST /containers/(id)/stop
Stop the container id
Example request:
POST /containers/e90e34656806/stop?t=5 HTTP/1.1
Example response:
HTTP/1.1 204 OK
Query Parameters:
- t – number of seconds to wait before killing the container
Status Codes:
- 204 – no error
- 404 – no such container
- 500 – server error
Restart a container
POST /containers/(id)/restart
Restart the container id
Example request:
POST /containers/e90e34656806/restart?t=5 HTTP/1.1
Example response:
HTTP/1.1 204 No Content
Query Parameters:
- t – number of seconds to wait before killing the container
Status Codes:
- 204 – no error
- 404 – no such container
- 500 – server error
Kill a container
POST /containers/(id)/kill
Kill the container id
Example request:
POST /containers/e90e34656806/kill HTTP/1.1
Example response:
HTTP/1.1 204 No Content
Status Codes:
- 204 – no error
- 404 – no such container
- 500 – server error
Attach to a container
POST /containers/(id)/attach
Attach to the container id
Example request:
POST /containers/16253994b7c4/attach?logs=1&stream=0&stdout=1 HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/vnd.docker.raw-stream
{{ STREAM }}
Query Parameters:
- logs – 1/True/true or 0/False/false, return logs. Defaul false
- stream – 1/True/true or 0/False/false, return stream. Default false
- stdin – 1/True/true or 0/False/false, if stream=true, attach to stdin. Default false
- stdout – 1/True/true or 0/False/false, if logs=true, return stdout log, if stream=true, attach to stdout. Default false
- stderr – 1/True/true or 0/False/false, if logs=true, return stderr log, if stream=true, attach to stderr. Default false
Status Codes:
- 200 – no error
- 400 – bad parameter
- 404 – no such container
- 500 – server error
Attach to a container (websocket)
GET /containers/(id)/attach/ws
Attach to the container id via websocket
Implements websocket protocol handshake according to RFC 6455
Example request
GET /containers/e90e34656806/attach/ws?logs=0&stream=1&stdin=1&stdout=1&stderr=1 HTTP/1.1
Example response
{{ STREAM }}
Query Parameters:
- logs – 1/True/true or 0/False/false, return logs. Default false
- stream – 1/True/true or 0/False/false, return stream. Default false
- stdin – 1/True/true or 0/False/false, if stream=true, attach to stdin. Default false
- stdout – 1/True/true or 0/False/false, if logs=true, return stdout log, if stream=true, attach to stdout. Default false
- stderr – 1/True/true or 0/False/false, if logs=true, return stderr log, if stream=true, attach to stderr. Default false
Status Codes:
- 200 – no error
- 400 – bad parameter
- 404 – no such container
- 500 – server error
Wait a container
POST /containers/(id)/wait
Block until container id stops, then returns the exit code
Example request:
POST /containers/16253994b7c4/wait HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{"StatusCode": 0}
Status Codes:
- 200 – no error
- 404 – no such container
- 500 – server error
Remove a container
DELETE /containers/(id)
Remove the container id from the filesystem
Example request:
DELETE /containers/16253994b7c4?v=1 HTTP/1.1
Example response:
HTTP/1.1 204 OK
Query Parameters:
- v – 1/True/true or 0/False/false, Remove the volumes associated to the container. Default false
Status Codes:
- 204 – no error
- 400 – bad parameter
- 404 – no such container
- 500 – server error
2.2 Images
List Images
GET /images/(format)
List images format could be json or viz (json default)
Example request:
GET /images/json?all=0 HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
[
{
"Repository":"ubuntu",
"Tag":"precise",
"Id":"b750fe79269d",
"Created":1364102658
},
{
"Repository":"ubuntu",
"Tag":"12.04",
"Id":"b750fe79269d",
"Created":1364102658
}
]
Example request:
GET /images/viz HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: text/plain
digraph docker {
"d82cbacda43a" -> "074be284591f"
"1496068ca813" -> "08306dc45919"
"08306dc45919" -> "0e7893146ac2"
"b750fe79269d" -> "1496068ca813"
base -> "27cf78414709" [style=invis]
"f71189fff3de" -> "9a33b36209ed"
"27cf78414709" -> "b750fe79269d"
"0e7893146ac2" -> "d6434d954665"
"d6434d954665" -> "d82cbacda43a"
base -> "e9aa60c60128" [style=invis]
"074be284591f" -> "f71189fff3de"
"b750fe79269d" [label="b750fe79269d\nubuntu",shape=box,fillcolor="paleturquoise",style="filled,rounded"];
"e9aa60c60128" [label="e9aa60c60128\ncentos",shape=box,fillcolor="paleturquoise",style="filled,rounded"];
"9a33b36209ed" [label="9a33b36209ed\nfedora",shape=box,fillcolor="paleturquoise",style="filled,rounded"];
base [style=invisible]
}
Query Parameters:
- all – 1/True/true or 0/False/false, Show all containers. Only running containers are shown by defaul
Status Codes:
- 200 – no error
- 400 – bad parameter
- 500 – server error
Create an image
POST /images/create
Create an image, either by pull it from the registry or by importing i
Example request:
POST /images/create?fromImage=ubuntu HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/vnd.docker.raw-stream
{{ STREAM }}
Query Parameters:
- fromImage – name of the image to pull
- fromSrc – source to import, - means stdin
- repo – repository
- tag – tag
- registry – the registry to pull from
Status Codes:
- 200 – no error
- 500 – server error
Insert a file in an image
POST /images/(name)/insert
Insert a file from url in the image name at path
Example request:
POST /images/test/insert?path=/usr&url=myurl HTTP/1.1
Example response:
HTTP/1.1 200 OK
{{ TAR STREAM }}
Query Parameters:
- url – The url from where the file is taken
- path – The path where the file is stored
Status Codes:
- 200 – no error
- 500 – server error
Inspect an image
GET /images/(name)/json
Return low-level information on the image name
Example request:
GET /images/centos/json HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"id":"b750fe79269d2ec9a3c593ef05b4332b1d1a02a62b4accb2c21d589ff2f5f2dc",
"parent":"27cf784147099545",
"created":"2013-03-23T22:24:18.818426-07:00",
"container":"3d67245a8d72ecf13f33dffac9f79dcdf70f75acb84d308770391510e0c23ad0",
"container_config":
{
"Hostname":"",
"User":"",
"Memory":0,
"MemorySwap":0,
"AttachStdin":false,
"AttachStdout":false,
"AttachStderr":false,
"PortSpecs":null,
"Tty":true,
"OpenStdin":true,
"StdinOnce":false,
"Env":null,
"Cmd": ["/bin/bash"],
"Dns":null,
"Image":"centos",
"Volumes":null,
"VolumesFrom":""
}
}
Status Codes:
- 200 – no error
- 404 – no such image
- 500 – server error
Get the history of an image
GET /images/(name)/history
Return the history of the image name
Example request:
GET /images/fedora/history HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
[
{
"Id": "b750fe79269d",
"Created": 1364102658,
"CreatedBy": "/bin/bash"
},
{
"Id": "27cf78414709",
"Created": 1364068391,
"CreatedBy": ""
}
]
Status Codes:
- 200 – no error
- 404 – no such image
- 500 – server error
Push an image on the registry
POST /images/(name)/push
Push the image name on the registry
> **Example request**:
>
> POST /images/test/push HTTP/1.1
>
> **Example response**:
HTTP/1.1 200 OK
Content-Type: application/vnd.docker.raw-stream
{{ STREAM }}
Status Codes:
- 200 – no error
- 404 – no such image
- 500 – server error
Tag an image into a repository
POST /images/(name)/tag
Tag the image name into a repository
Example request:
POST /images/test/tag?repo=myrepo&force=0&tag=v42 HTTP/1.1
Example response:
HTTP/1.1 201 OK
Query Parameters:
- repo – The repository to tag in
- force – 1/True/true or 0/False/false, default false
- tag - The new tag name
Status Codes:
- 201 – no error
- 400 – bad parameter
- 404 – no such image
- 500 – server error
Remove an image
DELETE /images/(name)
Remove the image name from the filesystem
Example request:
DELETE /images/test HTTP/1.1
Example response:
HTTP/1.1 204 No Content
Status Codes:
- 204 – no error
- 404 – no such image
- 500 – server error
Search images
GET /images/search
Search for an image on Docker Hub
Example request:
GET /images/search?term=sshd HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
[
{
"Name":"cespare/sshd",
"Description":""
},
{
"Name":"johnfuller/sshd",
"Description":""
},
{
"Name":"dhrp/mongodb-sshd",
"Description":""
}
]
:query term: term to search
:statuscode 200: no error
:statuscode 500: server error
2.3 Misc
Build an image from Dockerfile via stdin
POST /build
Build an image from Dockerfile via stdin
Example request:
POST /build HTTP/1.1
{{ TAR STREAM }}
Example response:
HTTP/1.1 200 OK
{{ STREAM }}
Query Parameters:
- t – repository name to be applied to the resulting image in case of success
Status Codes:
- 200 – no error
- 500 – server error
Get default username and email
GET /auth
Get the default username and email
Example request:
GET /auth HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"username":"hannibal",
"email":"hannibal@a-team.com"
}
Status Codes:
- 200 – no error
- 500 – server error
Check auth configuration and store i
POST /auth
Get the default username and email
Example request:
POST /auth HTTP/1.1
Content-Type: application/json
{
"username":"hannibal",
"password:"xxxx",
"email":"hannibal@a-team.com"
}
Example response:
HTTP/1.1 200 OK
Content-Type: text/plain
Status Codes:
- 200 – no error
- 204 – no error
- 500 – server error
Display system-wide information
GET /info
Display system-wide information
Example request:
GET /info HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Containers":11,
"Images":16,
"Debug":false,
"NFd": 11,
"NGoroutines":21,
"MemoryLimit":true,
"SwapLimit":false
}
Status Codes:
- 200 – no error
- 500 – server error
Show the docker version information
GET /version
Show the docker version information
Example request:
GET /version HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Version":"0.2.2",
"GitCommit":"5a2a5cc+CHANGES",
"GoVersion":"go1.0.3"
}
Status Codes:
- 200 – no error
- 500 – server error
Create a new image from a container's changes
POST /commit
Create a new image from a container's changes > > Example request:
POST /commit?container=44c004db4b17&m=message&repo=myrepo HTTP/1.1
Content-Type: application/json
{
"Cmd": ["cat", "/world"],
"PortSpecs":["22"]
}
Example response:
HTTP/1.1 201 OK
Content-Type: application/vnd.docker.raw-stream
{"Id": "596069db4bf5"}
Query Parameters:
- container – source container
- repo – repository
- tag – tag
- m – commit message
- author – author (e.g., "John Hannibal Smith <hannibal@a-team.com>")
Status Codes:
- 201 – no error
- 404 – no such container
- 500 – server error
3. Going further
3.1 Inside docker run
As an example, the docker run command line makes the following API calls:
-
Create the container
-
If the status code is 404, it means the image doesn't exist:
- Try to pull it
- Then retry to create the container
-
Start the container
-
If you are not in detached mode:
- Attach to the container, using logs=1 (to have stdout and stderr from the container's start) and stream=1
-
If in detached mode or only stdin is attached:
- Display the container's
3.2 Hijacking
In this first version of the API, some of the endpoints, like /attach, /pull or /push uses hijacking to transport stdin, stdout and stderr on the same socket. This might change in the future.