Docker Remote API v1.8

发布于 2015-09-10 16:27:55 | 169 次阅读 | 评论: 0 | 来源: 网络整理

Table of Contents

Docker Remote API v1.8

1. Brief introduction ¶

The Remote API has replaced rcli
The daemon listens on unix:///var/run/docker.sock, but you can 绑定Docker到另一台主机/端口或Unix套接字.
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&size=1 HTTP/1.1

	

Example response:

	HTTP/1.1 200 OK
Content-Type: application/json

[
     {
             "Id": "8dfafdbc3a40",
             "Image": "base:latest",
             "Command": "echo 1",
             "Created": 1367854155,
             "Status": "Exit 0",
             "Ports":[{"PrivatePort": 2222, "PublicPort": 3333, "Type": "tcp"}],
             "SizeRw":12288,
             "SizeRootFs":0
     },
     {
             "Id": "9cd87474be90",
             "Image": "base:latest",
             "Command": "echo 222222",
             "Created": 1367854155,
             "Status": "Exit 0",
             "Ports":[],
             "SizeRw":12288,
             "SizeRootFs":0
     },
     {
             "Id": "3176a2479c92",
             "Image": "base:latest",
             "Command": "echo 3333333333333333",
             "Created": 1367854154,
             "Status": "Exit 0",
             "Ports":[],
             "SizeRw":12288,
             "SizeRootFs":0
     },
     {
             "Id": "4cb07b47f9fb",
             "Image": "base:latest",
             "Command": "echo 444444444444444444444444444444444",
             "Created": 1367854152,
             "Status": "Exit 0",
             "Ports":[],
             "SizeRw":12288,
             "SizeRootFs":0
     }
]

	

Query Parameters:

Query Parameters:
	all – 1/True/true or 0/False/false, Show all containers. Only running containers are shown by default limit – Show `limit` last 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. size – 1/True/true or 0/False/false, Show the containers sizes
Status Codes:	200 – no error 400 – bad parameter 500 – server error

all – 1/True/true or 0/False/false, Show all containers. Only running containers are shown by default
limit – Show limit last 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.
size – 1/True/true or 0/False/false, Show the containers sizes

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":"base",
     "Volumes":{
             "/tmp": {}
     },
     "VolumesFrom":"",
     "WorkingDir":"",
     "ExposedPorts":{
             "22/tcp": {}
     }
}

	

Example response:

	HTTP/1.1 201 OK
Content-Type: application/json

{
     "Id":"e90e34656806"
     "Warnings":[]
}

	

Json Parameters:
	config – the container’s configuration
Query Parameters:
	name – Assign the specified name to the container. Must match `/?[a-zA-Z0-9_-]+`.
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": "base",
                     "Volumes": {},
                     "VolumesFrom": "",
                     "WorkingDir":""

             },
             "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/dotcloud/docker/bin/docker",
             "ResolvConfPath": "/etc/resolv.conf",
             "Volumes": {},
             "HostConfig": {
                 "Binds": null,
                 "ContainerIDFile": "",
                 "LxcConf": [],
                 "Privileged": false,
                 "PortBindings": {
                    "80/tcp": [
                        {
                            "HostIp": "0.0.0.0",
                            "HostPort": "49153"
                        }
                    ]
                 },
                 "Links": null,
                 "PublishAllPorts": false
             }
}

	

Status Codes:	200 – no error 404 – no such container 500 – server error

List processes running inside a container ¶

GET /containers/(id)/top¶

List processes running inside the container id

Example request:

	GET /containers/4fa6e0f0c678/top HTTP/1.1

	

Example response:

	HTTP/1.1 200 OK
Content-Type: application/json

{
     "Titles":[
             "USER",
             "PID",
             "%CPU",
             "%MEM",
             "VSZ",
             "RSS",
             "TTY",
             "STAT",
             "START",
             "TIME",
             "COMMAND"
             ],
     "Processes":[
             ["root","20147","0.0","0.1","18060","1864","pts/4","S","10:06","0:00","bash"],
             ["root","20271","0.0","0.0","4312","352","pts/4","S+","10:07","0:00","sleep","10"]
     ]
}

	

Query Parameters:
	ps_args – ps arguments to use (eg. aux)
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

{{ 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/(id)/start HTTP/1.1
Content-Type: application/json

{
     "Binds":["/tmp:/tmp"],
     "LxcConf":{"lxc.utsname":"docker"},
     "PortBindings":{ "22/tcp": [{ "HostPort": "11022" }] },
     "PublishAllPorts":false,
     "Privileged":false
}

	

Example response:

	HTTP/1.1 204 No Content
Content-Type: text/plain

Json Parameters:
	hostConfig – the container’s host configuration (optional)
Status Codes:	204 – 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 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

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 OK

	

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:

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

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

Stream details:

When using the TTY setting is enabled in POST /containers/create, the stream is the raw data from the process PTY and client’s stdin. When the TTY is disabled, then the stream is multiplexed to separate stdout and stderr.

The format is a Header and a Payload (frame).

HEADER

The header will contain the information on which stream write the stream (stdout or stderr). It also contain the size of the associated frame encoded on the last 4 bytes (uint32).

It is encoded on the first 8 bytes like this:

header := [8]byte{STREAM_TYPE, 0, 0, 0, SIZE1, SIZE2, SIZE3, SIZE4}

STREAM_TYPE can be:

0: stdin (will be writen on stdout)
1: stdout
2: stderr

SIZE1, SIZE2, SIZE3, SIZE4 are the 4 bytes of the uint32 size encoded as big endian.

PAYLOAD

The payload is the raw stream.

IMPLEMENTATION

The simplest way to implement the Attach protocol is the following:

Read 8 bytes
chose stdout or stderr depending on the first byte
Extract the frame size from the last 4 byets
Read the extracted size and output it on the correct output
Goto 1)

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

Copy files or folders from a container ¶

POST /containers/(id)/copy¶

Copy files or folders of container id

Example request:

	POST /containers/4fa6e0f0c678/copy HTTP/1.1
Content-Type: application/json

{
     "Resource":"test.txt"
}

	

Example response:

	HTTP/1.1 200 OK
Content-Type: application/octet-stream

{{ STREAM }}

Status Codes:	200 – no error 404 – no such container 500 – server error

2.2 Images ¶

List Images ¶

GET /images/json¶

Example request:

	GET /images/json?all=0 HTTP/1.1

	

Example response:

	HTTP/1.1 200 OK
Content-Type: application/json

[
  {
     "RepoTags": [
       "ubuntu:12.04",
       "ubuntu:precise",
       "ubuntu:latest"
     ],
     "Id": "8dbd9e392a964056420e5d58ca5cc376ef18e2de93b5cc90e868a1bbc8318c1c",
     "Created": 1365714795,
     "Size": 131506275,
     "VirtualSize": 131506275
  },
  {
     "RepoTags": [
       "ubuntu:12.10",
       "ubuntu:quantal"
     ],
     "ParentId": "27cf784147099545",
     "Id": "b750fe79269d2ec9a3c593ef05b4332b1d1a02a62b4accb2c21d589ff2f5f2dc",
     "Created": 1364102658,
     "Size": 24653,
     "VirtualSize": 180116135
  }
]

	

Create an image ¶

POST /images/create¶

Create an image, either by pull it from the registry or by importing it

Example request:

	POST /images/create?fromImage=base HTTP/1.1

	

Example response:

	HTTP/1.1 200 OK
Content-Type: application/json

{"status":"Pulling..."}
{"status":"Pulling", "progress":"1 B/ 100 B", "progressDetail":{"current":1, "total":100}}
{"error":"Invalid..."}
...

	

When using this endpoint to pull an image from the registry, the X-Registry-Auth header can be used to include a base64-encoded AuthConfig object.

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
Request Headers:
	X-Registry-Auth – base64-encoded AuthConfig object
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
Content-Type: application/json

{"status":"Inserting..."}
{"status":"Inserting", "progress":"1/? (n/a)", "progressDetail":{"current":1}}
{"error":"Invalid..."}
...

	

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/base/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":"base",
                     "Volumes":null,
                     "VolumesFrom":"",
                     "WorkingDir":""
             },
     "Size": 6824592
}

	

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/base/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/json

{"status":"Pushing..."}
{"status":"Pushing", "progress":"1/? (n/a)", "progressDetail":{"current":1}}}
{"error":"Invalid..."}
...

	

Query Parameters:
	registry – the registry you wan to push, optional
Request Headers:
	X-Registry-Auth – include a base64-encoded AuthConfig object.
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 HTTP/1.1

	

Example response:

	HTTP/1.1 200 OK

	

Query Parameters:
	repo – The repository to tag in force – 1/True/true or 0/False/false, default false
Status Codes:	200 – no error 400 – bad parameter 404 – no such image 409 – conflict 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/1.1 200 OK
Content-type: application/json

[
 {"Untagged":"3e2f21a89f"},
 {"Deleted":"3e2f21a89f"},
 {"Deleted":"53b4f83ac9"}
]

	

Status Codes:	200 – no error 404 – no such image 409 – conflict 500 – server error

Search images ¶

GET /images/search¶

Search for an image in the docker index.

注解

The response keys have changed from API v1.6 to reflect the JSON sent by the registry server to the docker daemon’s request.

Example request:

	GET /images/search?term=sshd HTTP/1.1

	

Example response:

	HTTP/1.1 200 OK
Content-Type: application/json

[
        {
            "description": "",
            "is_official": false,
            "is_trusted": false,
            "name": "wma55/u1210sshd",
            "star_count": 0
        },
        {
            "description": "",
            "is_official": false,
            "is_trusted": false,
            "name": "jdswinbank/sshd",
            "star_count": 0
        },
        {
            "description": "",
            "is_official": false,
            "is_trusted": false,
            "name": "vgauthier/sshd",
            "star_count": 0
        }
...
]

	

Query Parameters:
	term – term to search
Status Codes:	200 – no error 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

{{ STREAM }}

Example response:

	HTTP/1.1 200 OK
Content-Type: application/json

{"stream":"Step 1..."}
{"stream":"..."}
{"error":"Error...", "errorDetail":{"code": 123, "message": "Error..."}}

	

The stream must be a tar archive compressed with one of the following algorithms: identity (no compression), gzip, bzip2, xz.

The archive must include a file called Dockerfile at its root. It may include any number of other files, which will be accessible in the build context (See the ADD build command).

Query Parameters:
	t – repository name (and optionally a tag) to be applied to the resulting image in case of success q – suppress verbose build output nocache – do not use the cache when building the image
Request Headers:
	Content-type – should be set to `"application/tar"`. X-Registry-Auth – base64-encoded AuthConfig object
Status Codes:	200 – no error 500 – server error

Check auth configuration ¶

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",
     "serveraddress":"https://index.docker.io/v1/"
}

	

Example response:

	HTTP/1.1 200 OK

	

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,
     "IPv4Forwarding":true
}

	

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

	

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 (eg. “John Hannibal Smith <hannibal@a-team.com>”) run – config automatically applied when the image is run. (ex: {“Cmd”: [“cat”, “/world”], “PortSpecs”:[“22”]})
Status Codes:	201 – no error 404 – no such container 500 – server error

Monitor Docker’s events ¶

GET /events¶

Get events from docker, either in real time via streaming, or via polling (using since)

Example request:

GET /events?since=1374067924

Example response:

	HTTP/1.1 200 OK
Content-Type: application/json

{"status":"create","id":"dfdf82bd3881","from":"base:latest","time":1374067924}
{"status":"start","id":"dfdf82bd3881","from":"base:latest","time":1374067924}
{"status":"stop","id":"dfdf82bd3881","from":"base:latest","time":1374067966}
{"status":"destroy","id":"dfdf82bd3881","from":"base:latest","time":1374067970}

	

Query Parameters:
	since – timestamp used for polling
Status Codes:	200 – no error 500 – server error

Get a tarball containing all images and tags in a repository ¶

GET /images/(name)/get¶

Get a tarball containing all images and metadata for the repository specified by name.

Example request

GET /images/ubuntu/get

Example response:

	HTTP/1.1 200 OK
Content-Type: application/x-tar

Binary data stream

Status Codes:	200 – no error 500 – server error

Load a tarball with a set of images and tags into docker ¶

POST /images/load¶

Load a set of images and tags into the docker repository.

Example request

	POST /images/load

Tarball in body

Example response:

	HTTP/1.1 200 OK

	

Status Codes:	200 – no error 500 – server error

3. Going further ¶

3.1 Inside ‘docker run’¶

Here are the steps of ‘docker run’ :

Create the container
If the status code is 404, it means the image doesn’t exists:
- 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 id

3.2 Hijacking ¶

In this version of the API, /attach, uses hijacking to transport stdin, stdout and stderr on the same socket. This might change in the future.

3.3 CORS Requests ¶

To enable cross origin requests to the remote api add the flag “-api-enable-cors” when running docker in daemon mode.

docker -d -H="192.168.1.9:4243" -api-enable-cors

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