01f9227ec9
Commit e98e4a7111 implemented API version
negotiation using the `/_ping` endpoint. In that change, URL validation for the
maximum supported API version was removed from the API server (validation for
the _minimum_ version was kept in place).
With this feature, clients that support version negotiation would negotiate the
maximum version supported by the daemon, and downgrade to an older API version
if the client's default API version is not supported.
However, clients that do _not_ support version negotiation can call API versions
that are higher than the maximum supported version. Due to the missing version
check, this is silently ignored, and the daemon's default API version is used.
This is a problem, because the actual API version in use is non-deterministic;
for example, calling `/v9999.9999/version` on a daemon that runs API v1.34 will
use API v1.34, but calling the same URL on an older daemon may use API version
v1.24.
This patch reverts the removal of the API check for maximum supported versions.
The documentation has been updated accordingly
Before this patch is applied, the daemon returns a 200 (success):
$ curl -v --unix-socket /var/run/docker.sock http://localhost/v9999.9999/version
* Trying /var/run/docker.sock...
* Connected to localhost (/Users/sebastiaan/Library/Containers/com.dock) port 80 (#0)
> GET /v9999.9999/version HTTP/1.1
> Host: localhost
> User-Agent: curl/7.54.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Api-Version: 1.32
< Content-Length: 240
< Content-Type: application/json
< Date: Tue, 10 Oct 2017 09:11:29 GMT
< Docker-Experimental: true
< Ostype: linux
< Server: Docker/17.09.0-ce (linux)
<
{"Version":"17.09.0-ce","ApiVersion":"1.32","MinAPIVersion":"1.12","GitCommit":"afdb6d4","GoVersion":"go1.8.3","Os":"linux","Arch":"amd64","KernelVersion":"4.9.49-moby","Experimental":true,"BuildTime":"2017-09-26T22:45:38.000000000+00:00"}
* Connection #0 to host localhost left intact
After this patch is applied, a 400 (Bad Request) is returned:
$ curl -v --unix-socket /var/run/docker.sock http://localhost/v9999.9999/version
* Trying /var/run/docker.sock...
* Connected to localhost (/var/run/docker.sock) port 80 (#0)
> GET /v9999.9999/info HTTP/1.1
> Host: localhost
> User-Agent: curl/7.52.1
> Accept: */*
>
< HTTP/1.1 400 Bad Request
< Content-Type: application/json
< Date: Tue, 10 Oct 2017 08:08:34 GMT
< Content-Length: 89
<
{"message":"client version 9999.9999 is too new. Maximim supported API version is 1.34"}
* Curl_http_done: called premature == 0
* Connection #0 to host localhost left intact
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
96 KiB
| title | description | keywords | redirect_from | ||
|---|---|---|---|---|---|
| Engine API v1.22 | API Documentation for Docker | API, Docker, rcli, REST, documentation |
|
1. Brief introduction
- The daemon listens on
unix:///var/run/docker.sockbut you can Bind Docker to another host/port or a Unix socket. - The API tends to be REST. However, for some complex commands, like
attachorpull, the HTTP connection is hijacked to transportstdout,stdinandstderr. - A
Content-Lengthheader should be present inPOSTrequests to endpoints that expect a body. - To lock to a specific version of the API, you prefix the URL with the version
of the API to use. For example,
/v1.18/info. If no version is included in the URL, the maximum supported API version is used. - If the API version specified in the URL is not supported by the daemon, a HTTP
400 Bad Requesterror message is returned.
2. Endpoints
2.1 Containers
List containers
GET /containers/json
List containers
Example request:
GET /v1.22/containers/json?all=1&before=8dfafdbc3a40&size=1 HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
[
{
"Id": "8dfafdbc3a40",
"Names":["/boring_feynman"],
"Image": "ubuntu:latest",
"ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
"Command": "echo 1",
"Created": 1367854155,
"Status": "Exit 0",
"Ports": [{"PrivatePort": 2222, "PublicPort": 3333, "Type": "tcp"}],
"Labels": {
"com.example.vendor": "Acme",
"com.example.license": "GPL",
"com.example.version": "1.0"
},
"SizeRw": 12288,
"SizeRootFs": 0,
"HostConfig": {
"NetworkMode": "default"
},
"NetworkSettings": {
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812",
"EndpointID": "2cdc4edb1ded3631c81f57966563e5c8525b81121bb3706a9a9a3ae102711f3f",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02"
}
}
}
},
{
"Id": "9cd87474be90",
"Names":["/coolName"],
"Image": "ubuntu:latest",
"ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
"Command": "echo 222222",
"Created": 1367854155,
"Status": "Exit 0",
"Ports": [],
"Labels": {},
"SizeRw": 12288,
"SizeRootFs": 0,
"HostConfig": {
"NetworkMode": "default"
},
"NetworkSettings": {
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812",
"EndpointID": "88eaed7b37b38c2a3f0c4bc796494fdf51b270c2d22656412a2ca5d559a64d7a",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.8",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:08"
}
}
}
},
{
"Id": "3176a2479c92",
"Names":["/sleepy_dog"],
"Image": "ubuntu:latest",
"ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
"Command": "echo 3333333333333333",
"Created": 1367854154,
"Status": "Exit 0",
"Ports":[],
"Labels": {},
"SizeRw":12288,
"SizeRootFs":0,
"HostConfig": {
"NetworkMode": "default"
},
"NetworkSettings": {
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812",
"EndpointID": "8b27c041c30326d59cd6e6f510d4f8d1d570a228466f956edf7815508f78e30d",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.6",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:06"
}
}
}
},
{
"Id": "4cb07b47f9fb",
"Names":["/running_cat"],
"Image": "ubuntu:latest",
"ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
"Command": "echo 444444444444444444444444444444444",
"Created": 1367854152,
"Status": "Exit 0",
"Ports": [],
"Labels": {},
"SizeRw": 12288,
"SizeRootFs": 0,
"HostConfig": {
"NetworkMode": "default"
},
"NetworkSettings": {
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812",
"EndpointID": "d91c7b2f0644403d7ef3095985ea0e2370325cd2332ff3a3225c4247328e66e9",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.5",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:05"
}
}
}
}
]
Query parameters:
- all – 1/True/true or 0/False/false, Show all containers. Only running containers are shown by default (i.e., this defaults to false)
- 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.
- size – 1/True/true or 0/False/false, Show the containers sizes
- filters - a JSON encoded value of the filters (a
map[string][]string) to process on the containers list. Available filters: exited=<int>; -- containers with exit code of<int>;status=(created|restarting|running|paused|exited|dead)label=keyorlabel="key=value"of a container labelisolation=(default|process|hyperv) (Windows daemon only)
Status codes:
- 200 – no error
- 400 – bad parameter
- 500 – server error
Create a container
POST /containers/create
Create a container
Example request:
POST /v1.22/containers/create HTTP/1.1
Content-Type: application/json
Content-Length: 12345
{
"Hostname": "",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": true,
"AttachStderr": true,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"FOO=bar",
"BAZ=quux"
],
"Cmd": [
"date"
],
"Entrypoint": null,
"Image": "ubuntu",
"Labels": {
"com.example.vendor": "Acme",
"com.example.license": "GPL",
"com.example.version": "1.0"
},
"Volumes": {
"/volumes/data": {}
},
"WorkingDir": "",
"NetworkDisabled": false,
"MacAddress": "12:34:56:78:9a:bc",
"ExposedPorts": {
"22/tcp": {}
},
"StopSignal": "SIGTERM",
"HostConfig": {
"Binds": ["/tmp:/tmp"],
"Tmpfs": { "/run": "rw,noexec,nosuid,size=65536k" },
"Links": ["redis3:redis"],
"Memory": 0,
"MemorySwap": 0,
"MemoryReservation": 0,
"KernelMemory": 0,
"CpuShares": 512,
"CpuPeriod": 100000,
"CpuQuota": 50000,
"CpusetCpus": "0,1",
"CpusetMems": "0,1",
"BlkioWeight": 300,
"BlkioWeightDevice": [{}],
"BlkioDeviceReadBps": [{}],
"BlkioDeviceReadIOps": [{}],
"BlkioDeviceWriteBps": [{}],
"BlkioDeviceWriteIOps": [{}],
"MemorySwappiness": 60,
"OomKillDisable": false,
"OomScoreAdj": 500,
"PidMode": "",
"PortBindings": { "22/tcp": [{ "HostPort": "11022" }] },
"PublishAllPorts": false,
"Privileged": false,
"ReadonlyRootfs": false,
"Dns": ["8.8.8.8"],
"DnsOptions": [""],
"DnsSearch": [""],
"ExtraHosts": null,
"VolumesFrom": ["parent", "other:ro"],
"CapAdd": ["NET_ADMIN"],
"CapDrop": ["MKNOD"],
"GroupAdd": ["newgroup"],
"RestartPolicy": { "Name": "", "MaximumRetryCount": 0 },
"NetworkMode": "bridge",
"Devices": [],
"Ulimits": [{}],
"LogConfig": { "Type": "json-file", "Config": {} },
"SecurityOpt": [],
"CgroupParent": "",
"VolumeDriver": "",
"ShmSize": 67108864
},
"NetworkingConfig": {
"EndpointsConfig": {
"isolated_nw" : {
"IPAMConfig": {
"IPv4Address":"172.20.30.33",
"IPv6Address":"2001:db8:abcd::3033"
},
"Links":["container_1", "container_2"],
"Aliases":["server_x", "server_y"]
}
}
}
}
Example response:
HTTP/1.1 201 Created
Content-Type: application/json
{
"Id":"e90e34656806",
"Warnings":[]
}
JSON parameters:
- Hostname - A string value containing the hostname to use for the container.
- Domainname - A string value containing the domain name to use for the container.
- User - A string value specifying the user inside the container.
- AttachStdin - Boolean value, attaches to
stdin. - AttachStdout - Boolean value, attaches to
stdout. - AttachStderr - Boolean value, attaches to
stderr. - Tty - Boolean value, Attach standard streams to a
tty, includingstdinif it is not closed. - OpenStdin - Boolean value, opens
stdin, - StdinOnce - Boolean value, close
stdinafter the 1 attached client disconnects. - Env - A list of environment variables in the form of
["VAR=value", ...] - Labels - Adds a map of labels to a container. To specify a map:
{"key":"value", ... } - Cmd - Command to run specified as a string or an array of strings.
- Entrypoint - Set the entry point for the container as a string or an array of strings.
- Image - A string specifying the image name to use for the container.
- Volumes - An object mapping mount point paths (strings) inside the container to empty objects.
- WorkingDir - A string specifying the working directory for commands to run in.
- NetworkDisabled - Boolean value, when true disables networking for the container
- ExposedPorts - An object mapping ports to an empty object in the form of:
"ExposedPorts": { "<port>/<tcp|udp>: {}" } - StopSignal - Signal to stop a container as a string or unsigned integer.
SIGTERMby default. - HostConfig
- Binds – A list of volume bindings for this container. Each volume binding is a string in one of these forms:
host-src:container-destto bind-mount a host path into the container. Bothhost-src, andcontainer-destmust be an absolute path.host-src:container-dest:roto make the bind mount read-only inside the container. Bothhost-src, andcontainer-destmust be an absolute path.volume-name:container-destto bind-mount a volume managed by a volume driver into the container.container-destmust be an absolute path.volume-name:container-dest:roto mount the volume read-only inside the container.container-destmust be an absolute path.
- Tmpfs – A map of container directories which should be replaced by tmpfs mounts, and their corresponding
mount options. A JSON object in the form
{ "/run": "rw,noexec,nosuid,size=65536k" }. - Links - A list of links for the container. Each link entry should be
in the form of
container_name:alias. - Memory - Memory limit in bytes.
- MemorySwap - Total memory limit (memory + swap); set
-1to enable unlimited swap. You must use this withmemoryand make the swap value larger thanmemory. - MemoryReservation - Memory soft limit in bytes.
- KernelMemory - Kernel memory limit in bytes.
- CpuShares - An integer value containing the container's CPU Shares (ie. the relative weight vs other containers).
- CpuPeriod - The length of a CPU period in microseconds.
- CpuQuota - Microseconds of CPU time that the container can get in a CPU period.
- CpusetCpus - String value containing the
cgroups CpusetCpusto use. - CpusetMems - Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only effective on NUMA systems.
- BlkioWeight - Block IO weight (relative weight) accepts a weight value between 10 and 1000.
- BlkioWeightDevice - Block IO weight (relative device weight) in the form of:
"BlkioWeightDevice": [{"Path": "device_path", "Weight": weight}] - BlkioDeviceReadBps - Limit read rate (bytes per second) from a device in the form of:
"BlkioDeviceReadBps": [{"Path": "device_path", "Rate": rate}], for example:"BlkioDeviceReadBps": [{"Path": "/dev/sda", "Rate": "1024"}]" - BlkioDeviceWriteBps - Limit write rate (bytes per second) to a device in the form of:
"BlkioDeviceWriteBps": [{"Path": "device_path", "Rate": rate}], for example:"BlkioDeviceWriteBps": [{"Path": "/dev/sda", "Rate": "1024"}]" - BlkioDeviceReadIOps - Limit read rate (IO per second) from a device in the form of:
"BlkioDeviceReadIOps": [{"Path": "device_path", "Rate": rate}], for example:"BlkioDeviceReadIOps": [{"Path": "/dev/sda", "Rate": "1000"}] - BlkioDeviceWriteIOps - Limit write rate (IO per second) to a device in the form of:
"BlkioDeviceWriteIOps": [{"Path": "device_path", "Rate": rate}], for example:"BlkioDeviceWriteIOps": [{"Path": "/dev/sda", "Rate": "1000"}] - MemorySwappiness - Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
- OomKillDisable - Boolean value, whether to disable OOM Killer for the container or not.
- OomScoreAdj - An integer value containing the score given to the container in order to tune OOM killer preferences.
- PidMode - Set the PID (Process) Namespace mode for the container;
"container:<name|id>": joins another container's PID namespace"host": use the host's PID namespace inside the container - PortBindings - A map of exposed container ports and the host port they
should map to. A JSON object in the form
{ <port>/<protocol>: [{ "HostPort": "<port>" }] }Take note thatportis specified as a string and not an integer value. - PublishAllPorts - Allocates a random host port for all of a container's exposed ports. Specified as a boolean value.
- Privileged - Gives the container full access to the host. Specified as a boolean value.
- ReadonlyRootfs - Mount the container's root filesystem as read only. Specified as a boolean value.
- Dns - A list of DNS servers for the container to use.
- DnsOptions - A list of DNS options
- DnsSearch - A list of DNS search domains
- ExtraHosts - A list of hostnames/IP mappings to add to the
container's
/etc/hostsfile. Specified in the form["hostname:IP"]. - VolumesFrom - A list of volumes to inherit from another container.
Specified in the form
<container name>[:<ro|rw>] - CapAdd - A list of kernel capabilities to add to the container.
- Capdrop - A list of kernel capabilities to drop from the container.
- GroupAdd - A list of additional groups that the container process will run as
- RestartPolicy – The behavior to apply when the container exits. The
value is an object with a
Nameproperty of either"always"to always restart,"unless-stopped"to restart always except when user has manually stopped the container or"on-failure"to restart only when the container exit code is non-zero. Ifon-failureis used,MaximumRetryCountcontrols the number of times to retry before giving up. The default is not to restart. (optional) An ever increasing delay (double the previous delay, starting at 100mS) is added before each restart to prevent flooding the server. - NetworkMode - Sets the networking mode for the container. Supported
standard values are:
bridge,host,none, andcontainer:<name|id>. Any other value is taken as a custom network's name to which this container should connect to. - Devices - A list of devices to add to the container specified as a JSON object in the
form
{ "PathOnHost": "/dev/deviceName", "PathInContainer": "/dev/deviceName", "CgroupPermissions": "mrw"} - Ulimits - A list of ulimits to set in the container, specified as
{ "Name": <name>, "Soft": <soft limit>, "Hard": <hard limit> }, for example:Ulimits: { "Name": "nofile", "Soft": 1024, "Hard": 2048 } - SecurityOpt: A list of string values to customize labels for MLS systems, such as SELinux.
- LogConfig - Log configuration for the container, specified as a JSON object in the form
{ "Type": "<driver_name>", "Config": {"key1": "val1"}}. Available types:json-file,syslog,journald,gelf,awslogs,splunk,none.json-filelogging driver. - CgroupParent - Path to
cgroupsunder which the container'scgroupis created. If the path is not absolute, the path is considered to be relative to thecgroupspath of the init process. Cgroups are created if they do not already exist. - VolumeDriver - Driver that this container users to mount volumes.
- ShmSize - Size of
/dev/shmin bytes. The size must be greater than 0. If omitted the system uses 64MB.
- Binds – A list of volume bindings for this container. Each volume binding is a string in one of these forms:
Query parameters:
- name – Assign the specified name to the container. Must
match
/?[a-zA-Z0-9_-]+.
Status codes:
- 201 – no error
- 400 – bad parameter
- 404 – no such container
- 406 – impossible to attach (container not running)
- 409 – conflict
- 500 – server error
Inspect a container
GET /containers/(id or name)/json
Return low-level information on the container id
Example request:
GET /v1.22/containers/4fa6e0f0c678/json HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"AppArmorProfile": "",
"Args": [
"-c",
"exit 9"
],
"Config": {
"AttachStderr": true,
"AttachStdin": false,
"AttachStdout": true,
"Cmd": [
"/bin/sh",
"-c",
"exit 9"
],
"Domainname": "",
"Entrypoint": null,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"ExposedPorts": null,
"Hostname": "ba033ac44011",
"Image": "ubuntu",
"Labels": {
"com.example.vendor": "Acme",
"com.example.license": "GPL",
"com.example.version": "1.0"
},
"MacAddress": "",
"NetworkDisabled": false,
"OnBuild": null,
"OpenStdin": false,
"StdinOnce": false,
"Tty": false,
"User": "",
"Volumes": {
"/volumes/data": {}
},
"WorkingDir": "",
"StopSignal": "SIGTERM"
},
"Created": "2015-01-06T15:47:31.485331387Z",
"Driver": "devicemapper",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"BlkioWeight": 0,
"BlkioWeightDevice": [{}],
"BlkioDeviceReadBps": [{}],
"BlkioDeviceWriteBps": [{}],
"BlkioDeviceReadIOps": [{}],
"BlkioDeviceWriteIOps": [{}],
"CapAdd": null,
"CapDrop": null,
"ContainerIDFile": "",
"CpusetCpus": "",
"CpusetMems": "",
"CpuShares": 0,
"CpuPeriod": 100000,
"Devices": [],
"Dns": null,
"DnsOptions": null,
"DnsSearch": null,
"ExtraHosts": null,
"IpcMode": "",
"Links": null,
"LxcConf": [],
"Memory": 0,
"MemorySwap": 0,
"MemoryReservation": 0,
"KernelMemory": 0,
"OomKillDisable": false,
"OomScoreAdj": 500,
"NetworkMode": "bridge",
"PidMode": "",
"PortBindings": {},
"Privileged": false,
"ReadonlyRootfs": false,
"PublishAllPorts": false,
"RestartPolicy": {
"MaximumRetryCount": 2,
"Name": "on-failure"
},
"LogConfig": {
"Config": null,
"Type": "json-file"
},
"SecurityOpt": null,
"VolumesFrom": null,
"Ulimits": [{}],
"VolumeDriver": "",
"ShmSize": 67108864
},
"HostnamePath": "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/hostname",
"HostsPath": "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/hosts",
"LogPath": "/var/lib/docker/containers/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b/1eb5fabf5a03807136561b3c00adcd2992b535d624d5e18b6cdc6a6844d9767b-json.log",
"Id": "ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39",
"Image": "04c5d3b7b0656168630d3ba35d8889bd0e9caafcaeb3004d2bfbc47e7c5d35d2",
"MountLabel": "",
"Name": "/boring_euclid",
"NetworkSettings": {
"Bridge": "",
"SandboxID": "",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": null,
"SandboxKey": "",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "",
"Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"MacAddress": "",
"Networks": {
"bridge": {
"NetworkID": "7ea29fc1412292a2d7bba362f9253545fecdfa8ce9a6e37dd10ba8bee7129812",
"EndpointID": "7587b82f0dada3656fda26588aee72630c6fab1536d36e394b2bfbcf898c971d",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:12:00:02"
}
}
},
"Path": "/bin/sh",
"ProcessLabel": "",
"ResolvConfPath": "/var/lib/docker/containers/ba033ac4401106a3b513bc9d639eee123ad78ca3616b921167cd74b20e25ed39/resolv.conf",
"RestartCount": 1,
"State": {
"Error": "",
"ExitCode": 9,
"FinishedAt": "2015-01-06T15:47:32.080254511Z",
"OOMKilled": false,
"Dead": false,
"Paused": false,
"Pid": 0,
"Restarting": false,
"Running": true,
"StartedAt": "2015-01-06T15:47:32.072697474Z",
"Status": "running"
},
"Mounts": [
{
"Name": "fac362...80535",
"Source": "/data",
"Destination": "/data",
"Driver": "local",
"Mode": "ro,Z",
"RW": false,
"Propagation": ""
}
]
}
Example request, with size information:
GET /v1.22/containers/4fa6e0f0c678/json?size=1 HTTP/1.1
Example response, with size information:
HTTP/1.1 200 OK
Content-Type: application/json
{
....
"SizeRw": 0,
"SizeRootFs": 972,
....
}
Query parameters:
- size – 1/True/true or 0/False/false, return container size information. Default is
false.
Status codes:
- 200 – no error
- 404 – no such container
- 500 – server error
List processes running inside a container
GET /containers/(id or name)/top
List processes running inside the container id. On Unix systems this
is done by running the ps command. This endpoint is not
supported on Windows.
Example request:
GET /v1.22/containers/4fa6e0f0c678/top HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Titles" : [
"UID", "PID", "PPID", "C", "STIME", "TTY", "TIME", "CMD"
],
"Processes" : [
[
"root", "13642", "882", "0", "17:03", "pts/0", "00:00:00", "/bin/bash"
],
[
"root", "13735", "13642", "0", "17:06", "pts/0", "00:00:00", "sleep 10"
]
]
}
Example request:
GET /v1.22/containers/4fa6e0f0c678/top?ps_args=aux 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","13642","0.0","0.1","18172","3184","pts/0","Ss","17:03","0:00","/bin/bash"
],
[
"root","13895","0.0","0.0","4348","692","pts/0","S+","17:15","0:00","sleep 10"
]
],
}
Query parameters:
- ps_args –
psarguments to use (e.g.,aux), defaults to-ef
Status codes:
- 200 – no error
- 404 – no such container
- 500 – server error
Get container logs
GET /containers/(id or name)/logs
Get stdout and stderr logs from the container id
Note
: This endpoint works only for containers with the
json-fileorjournaldlogging drivers.
Example request:
GET /v1.22/containers/4fa6e0f0c678/logs?stderr=1&stdout=1×tamps=1&follow=1&tail=10&since=1428990821 HTTP/1.1
Example response:
HTTP/1.1 101 UPGRADED
Content-Type: application/vnd.docker.raw-stream
Connection: Upgrade
Upgrade: tcp
{% raw %}
{{ STREAM }}
{% endraw %}
Query parameters:
- follow – 1/True/true or 0/False/false, return stream. Default
false. - stdout – 1/True/true or 0/False/false, show
stdoutlog. Defaultfalse. - stderr – 1/True/true or 0/False/false, show
stderrlog. Defaultfalse. - since – UNIX timestamp (integer) to filter logs. Specifying a timestamp will only output log-entries since that timestamp. Default: 0 (unfiltered)
- timestamps – 1/True/true or 0/False/false, print timestamps for
every log line. Default
false. - tail – Output specified number of lines at the end of logs:
allor<number>. Default all.
Status codes:
- 101 – no error, hints proxy about hijacking
- 200 – no error, no upgrade header found
- 404 – no such container
- 500 – server error
Inspect changes on a container's filesystem
GET /containers/(id or name)/changes
Inspect changes on container id's filesystem
Example request:
GET /v1.22/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
}
]
Values for Kind:
0: Modify1: Add2: Delete
Status codes:
- 200 – no error
- 404 – no such container
- 500 – server error
Export a container
GET /containers/(id or name)/export
Export the contents of container id
Example request:
GET /v1.22/containers/4fa6e0f0c678/export HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/octet-stream
{% raw %}
{{ TAR STREAM }}
{% endraw %}
Status codes:
- 200 – no error
- 404 – no such container
- 500 – server error
Get container stats based on resource usage
GET /containers/(id or name)/stats
This endpoint returns a live stream of a container's resource usage statistics.
Example request:
GET /v1.22/containers/redis1/stats HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"read" : "2015-01-08T22:57:31.547920715Z",
"networks": {
"eth0": {
"rx_bytes": 5338,
"rx_dropped": 0,
"rx_errors": 0,
"rx_packets": 36,
"tx_bytes": 648,
"tx_dropped": 0,
"tx_errors": 0,
"tx_packets": 8
},
"eth5": {
"rx_bytes": 4641,
"rx_dropped": 0,
"rx_errors": 0,
"rx_packets": 26,
"tx_bytes": 690,
"tx_dropped": 0,
"tx_errors": 0,
"tx_packets": 9
}
},
"memory_stats" : {
"stats" : {
"total_pgmajfault" : 0,
"cache" : 0,
"mapped_file" : 0,
"total_inactive_file" : 0,
"pgpgout" : 414,
"rss" : 6537216,
"total_mapped_file" : 0,
"writeback" : 0,
"unevictable" : 0,
"pgpgin" : 477,
"total_unevictable" : 0,
"pgmajfault" : 0,
"total_rss" : 6537216,
"total_rss_huge" : 6291456,
"total_writeback" : 0,
"total_inactive_anon" : 0,
"rss_huge" : 6291456,
"hierarchical_memory_limit" : 67108864,
"total_pgfault" : 964,
"total_active_file" : 0,
"active_anon" : 6537216,
"total_active_anon" : 6537216,
"total_pgpgout" : 414,
"total_cache" : 0,
"inactive_anon" : 0,
"active_file" : 0,
"pgfault" : 964,
"inactive_file" : 0,
"total_pgpgin" : 477
},
"max_usage" : 6651904,
"usage" : 6537216,
"failcnt" : 0,
"limit" : 67108864
},
"blkio_stats" : {},
"cpu_stats" : {
"cpu_usage" : {
"percpu_usage" : [
8646879,
24472255,
36438778,
30657443
],
"usage_in_usermode" : 50000000,
"total_usage" : 100215355,
"usage_in_kernelmode" : 30000000
},
"system_cpu_usage" : 739306590000000,
"throttling_data" : {"periods":0,"throttled_periods":0,"throttled_time":0}
},
"precpu_stats" : {
"cpu_usage" : {
"percpu_usage" : [
8646879,
24350896,
36438778,
30657443
],
"usage_in_usermode" : 50000000,
"total_usage" : 100093996,
"usage_in_kernelmode" : 30000000
},
"system_cpu_usage" : 9492140000000,
"throttling_data" : {"periods":0,"throttled_periods":0,"throttled_time":0}
}
}
The precpu_stats is the cpu statistic of last read, which is used for calculating the cpu usage percent. It is not the exact copy of the cpu_stats field.
Query parameters:
- stream – 1/True/true or 0/False/false, pull stats once then disconnect. Default
true.
Status codes:
- 200 – no error
- 404 – no such container
- 500 – server error
Resize a container TTY
POST /containers/(id or name)/resize
Resize the TTY for container with id. The unit is number of characters. You must restart the container for the resize to take effect.
Example request:
POST /v1.22/containers/4fa6e0f0c678/resize?h=40&w=80 HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Length: 0
Content-Type: text/plain; charset=utf-8
Query parameters:
- h – height of
ttysession - w – width
Status codes:
- 200 – no error
- 404 – No such container
- 500 – Cannot resize container
Start a container
POST /containers/(id or name)/start
Start the container id
Note
: For backwards compatibility, this endpoint accepts a
HostConfigas JSON-encoded request body. See create a container for details.
Example request:
POST /v1.22/containers/e90e34656806/start HTTP/1.1
Example response:
HTTP/1.1 204 No Content
Query parameters:
- detachKeys – Override the key sequence for detaching a
container. Format is a single character
[a-Z]orctrl-<value>where<value>is one of:a-z,@,^,[,,or_.
Status codes:
- 204 – no error
- 304 – container already started
- 404 – no such container
- 500 – server error
Stop a container
POST /containers/(id or name)/stop
Stop the container id
Example request:
POST /v1.22/containers/e90e34656806/stop?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
- 304 – container already stopped
- 404 – no such container
- 500 – server error
Restart a container
POST /containers/(id or name)/restart
Restart the container id
Example request:
POST /v1.22/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 or name)/kill
Kill the container id
Example request:
POST /v1.22/containers/e90e34656806/kill HTTP/1.1
Example response:
HTTP/1.1 204 No Content
Query parameters:
- signal - Signal to send to the container: integer or string like
SIGINT. When not set,SIGKILLis assumed and the call waits for the container to exit.
Status codes:
- 204 – no error
- 404 – no such container
- 500 – server error
Update a container
POST /containers/(id or name)/update
Update resource configs of one or more containers.
Example request:
POST /v1.22/containers/e90e34656806/update HTTP/1.1
Content-Type: application/json
{
"BlkioWeight": 300,
"CpuShares": 512,
"CpuPeriod": 100000,
"CpuQuota": 50000,
"CpusetCpus": "0,1",
"CpusetMems": "0",
"Memory": 314572800,
"MemorySwap": 514288000,
"MemoryReservation": 209715200,
"KernelMemory": 52428800
}
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Warnings": []
}
Status codes:
- 200 – no error
- 400 – bad parameter
- 404 – no such container
- 500 – server error
Rename a container
POST /containers/(id or name)/rename
Rename the container id to a new_name
Example request:
POST /v1.22/containers/e90e34656806/rename?name=new_name HTTP/1.1
Example response:
HTTP/1.1 204 No Content
Query parameters:
- name – new name for the container
Status codes:
- 204 – no error
- 404 – no such container
- 409 - conflict name already assigned
- 500 – server error
Pause a container
POST /containers/(id or name)/pause
Pause the container id
Example request:
POST /v1.22/containers/e90e34656806/pause HTTP/1.1
Example response:
HTTP/1.1 204 No Content
Status codes:
- 204 – no error
- 404 – no such container
- 500 – server error
Unpause a container
POST /containers/(id or name)/unpause
Unpause the container id
Example request:
POST /v1.22/containers/e90e34656806/unpause 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 or name)/attach
Attach to the container id
Example request:
POST /v1.22/containers/16253994b7c4/attach?logs=1&stream=0&stdout=1 HTTP/1.1
Example response:
HTTP/1.1 101 UPGRADED
Content-Type: application/vnd.docker.raw-stream
Connection: Upgrade
Upgrade: tcp
{% raw %}
{{ STREAM }}
{% endraw %}
Query parameters:
- detachKeys – Override the key sequence for detaching a
container. Format is a single character
[a-Z]orctrl-<value>where<value>is one of:a-z,@,^,[,,or_. - 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 tostdin. Defaultfalse. - stdout – 1/True/true or 0/False/false, if
logs=true, returnstdoutlog, ifstream=true, attach tostdout. Defaultfalse. - stderr – 1/True/true or 0/False/false, if
logs=true, returnstderrlog, ifstream=true, attach tostderr. Defaultfalse.
Status codes:
- 101 – no error, hints proxy about hijacking
- 200 – no error, no upgrade header found
- 400 – bad parameter
- 404 – no such container
- 409 - container is paused
- 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 contains the information which the stream writes (stdout or
stderr). It also contains the size of the associated frame encoded in the
last four bytes (uint32).
It is encoded on the first eight bytes like this:
header := [8]byte{STREAM_TYPE, 0, 0, 0, SIZE1, SIZE2, SIZE3, SIZE4}
STREAM_TYPE can be:
- 0:
stdin(is written onstdout) - 1:
stdout - 2:
stderr
SIZE1, SIZE2, SIZE3, SIZE4 are the four 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:
1. Read eight bytes.
2. Choose `stdout` or `stderr` depending on the first byte.
3. Extract the frame size from the last four bytes.
4. Read the extracted size and output it on the correct output.
5. Goto 1.
Attach to a container (websocket)
GET /containers/(id or name)/attach/ws
Attach to the container id via websocket
Implements websocket protocol handshake according to RFC 6455
Example request
GET /v1.22/containers/e90e34656806/attach/ws?logs=0&stream=1&stdin=1&stdout=1&stderr=1 HTTP/1.1
Example response
{% raw %}
{{ STREAM }}
{% endraw %}
Query parameters:
- detachKeys – Override the key sequence for detaching a
container. Format is a single character
[a-Z]orctrl-<value>where<value>is one of:a-z,@,^,[,,or_. - 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 tostdin. Defaultfalse. - stdout – 1/True/true or 0/False/false, if
logs=true, returnstdoutlog, ifstream=true, attach tostdout. Defaultfalse. - stderr – 1/True/true or 0/False/false, if
logs=true, returnstderrlog, ifstream=true, attach tostderr. Defaultfalse.
Status codes:
- 200 – no error
- 400 – bad parameter
- 404 – no such container
- 500 – server error
Wait a container
POST /containers/(id or name)/wait
Block until container id stops, then returns the exit code
Example request:
POST /v1.22/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 or name)
Remove the container id from the filesystem
Example request:
DELETE /v1.22/containers/16253994b7c4?v=1 HTTP/1.1
Example response:
HTTP/1.1 204 No Content
Query parameters:
- v – 1/True/true or 0/False/false, Remove the volumes
associated to the container. Default
false. - force - 1/True/true or 0/False/false, Kill then remove the container.
Default
false. - link - 1/True/true or 0/False/false, Remove the specified
link associated to the container. Default
false.
Status codes:
- 204 – no error
- 400 – bad parameter
- 404 – no such container
- 409 – conflict
- 500 – server error
Copy files or folders from a container
POST /containers/(id or name)/copy
Copy files or folders of container id
Deprecated in favor of the archive endpoint below.
Example request:
POST /v1.22/containers/4fa6e0f0c678/copy HTTP/1.1
Content-Type: application/json
Content-Length: 12345
{
"Resource": "test.txt"
}
Example response:
HTTP/1.1 200 OK
Content-Type: application/x-tar
{% raw %}
{{ TAR STREAM }}
{% endraw %}
Status codes:
- 200 – no error
- 404 – no such container
- 500 – server error
Retrieving information about files and folders in a container
HEAD /containers/(id or name)/archive
See the description of the X-Docker-Container-Path-Stat header in the
following section.
Get an archive of a filesystem resource in a container
GET /containers/(id or name)/archive
Get a tar archive of a resource in the filesystem of container id.
Query parameters:
-
path - resource in the container's filesystem to archive. Required.
If not an absolute path, it is relative to the container's root directory. The resource specified by path must exist. To assert that the resource is expected to be a directory, path should end in
/or/.(assuming a path separator of/). If path ends in/.then this indicates that only the contents of the path directory should be copied. A symlink is always resolved to its target.Note
: It is not possible to copy certain system files such as resources under
/proc,/sys,/dev, and mounts created by the user in the container.
Example request:
GET /v1.22/containers/8cce319429b2/archive?path=/root HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/x-tar
X-Docker-Container-Path-Stat: eyJuYW1lIjoicm9vdCIsInNpemUiOjQwOTYsIm1vZGUiOjIxNDc0ODQwOTYsIm10aW1lIjoiMjAxNC0wMi0yN1QyMDo1MToyM1oiLCJsaW5rVGFyZ2V0IjoiIn0=
{% raw %}
{{ TAR STREAM }}
{% endraw %}
On success, a response header X-Docker-Container-Path-Stat will be set to a
base64-encoded JSON object containing some filesystem header information about
the archived resource. The above example value would decode to the following
JSON object (whitespace added for readability):
{
"name": "root",
"size": 4096,
"mode": 2147484096,
"mtime": "2014-02-27T20:51:23Z",
"linkTarget": ""
}
A HEAD request can also be made to this endpoint if only this information is
desired.
Status codes:
- 200 - success, returns archive of copied resource
- 400 - client error, bad parameter, details in JSON response body, one of:
- must specify path parameter (path cannot be empty)
- not a directory (path was asserted to be a directory but exists as a file)
- 404 - client error, resource not found, one of:
– no such container (container
iddoes not exist)- no such file or directory (path does not exist)
- 500 - server error
Extract an archive of files or folders to a directory in a container
PUT /containers/(id or name)/archive
Upload a tar archive to be extracted to a path in the filesystem of container
id.
Query parameters:
-
path - path to a directory in the container to extract the archive's contents into. Required.
If not an absolute path, it is relative to the container's root directory. The path resource must exist.
-
noOverwriteDirNonDir - If "1", "true", or "True" then it will be an error if unpacking the given content would cause an existing directory to be replaced with a non-directory and vice versa.
Example request:
PUT /v1.22/containers/8cce319429b2/archive?path=/vol1 HTTP/1.1
Content-Type: application/x-tar
{% raw %}
{{ TAR STREAM }}
{% endraw %}
Example response:
HTTP/1.1 200 OK
Status codes:
- 200 – the content was extracted successfully
- 400 - client error, bad parameter, details in JSON response body, one of:
- must specify path parameter (path cannot be empty)
- not a directory (path should be a directory but exists as a file)
- unable to overwrite existing directory with non-directory (if noOverwriteDirNonDir)
- unable to overwrite existing non-directory with directory (if noOverwriteDirNonDir)
- 403 - client error, permission denied, the volume or container rootfs is marked as read-only.
- 404 - client error, resource not found, one of:
– no such container (container
iddoes not exist)- no such file or directory (path resource does not exist)
- 500 – server error
2.2 Images
List Images
GET /images/json
Example request:
GET /v1.22/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,
"Labels": {}
},
{
"RepoTags": [
"ubuntu:12.10",
"ubuntu:quantal"
],
"ParentId": "27cf784147099545",
"Id": "b750fe79269d2ec9a3c593ef05b4332b1d1a02a62b4accb2c21d589ff2f5f2dc",
"Created": 1364102658,
"Size": 24653,
"VirtualSize": 180116135,
"Labels": {
"com.example.version": "v1"
}
}
]
Example request, with digest information:
GET /v1.22/images/json?digests=1 HTTP/1.1
Example response, with digest information:
HTTP/1.1 200 OK
Content-Type: application/json
[
{
"Created": 1420064636,
"Id": "4986bf8c15363d1c5d15512d5266f8777bfba4974ac56e3270e7760f6f0a8125",
"ParentId": "ea13149945cb6b1e746bf28032f02e9b5a793523481a0a18645fc77ad53c4ea2",
"RepoDigests": [
"localhost:5000/test/busybox@sha256:cbbf2f9a99b47fc460d422812b6a5adff7dfee951d8fa2e4a98caa0382cfbdbf"
],
"RepoTags": [
"localhost:5000/test/busybox:latest",
"playdate:latest"
],
"Size": 0,
"VirtualSize": 2429728,
"Labels": {}
}
]
The response shows a single image Id associated with two repositories
(RepoTags): localhost:5000/test/busybox: and playdate. A caller can use
either of the RepoTags values localhost:5000/test/busybox:latest or
playdate:latest to reference the image.
You can also use RepoDigests values to reference an image. In this response,
the array has only one reference and that is to the
localhost:5000/test/busybox repository; the playdate repository has no
digest. You can reference this digest using the value:
localhost:5000/test/busybox@sha256:cbbf2f9a99b47fc460d...
See the docker run and docker build commands for examples of digest and tag
references on the command line.
Query parameters:
- all – 1/True/true or 0/False/false, default false
- filters – a JSON encoded value of the filters (a map[string][]string) to process on the images list. Available filters:
dangling=truelabel=keyorlabel="key=value"of an image label- filter - only return images with the specified name
Build image from a Dockerfile
POST /build
Build an image from a Dockerfile
Example request:
POST /v1.22/build HTTP/1.1
Content-Type: application/x-tar
{% raw %}
{{ TAR STREAM }}
{% endraw %}
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{"stream": "Step 1/5..."}
{"stream": "..."}
{"error": "Error...", "errorDetail": {"code": 123, "message": "Error..."}}
The input stream must be a tar archive compressed with one of the
following algorithms: identity (no compression), gzip, bzip2, xz.
The archive must include a build instructions file, typically called
Dockerfile at the archive's root. The dockerfile parameter may be
used to specify a different build instructions file. To do this, its value must be
the path to the alternate build instructions file to use.
The archive may include any number of other files, which are accessible in the build context (See the ADD build command).
The Docker daemon performs a preliminary validation of the Dockerfile before
starting the build, and returns an error if the syntax is incorrect. After that,
each instruction is run one-by-one until the ID of the new image is output.
The build is canceled if the client drops the connection by quitting or being killed.
Query parameters:
- dockerfile - Path within the build context to the
Dockerfile. This is ignored ifremoteis specified and points to an externalDockerfile. - t – A name and optional tag to apply to the image in the
name:tagformat. If you omit thetagthe defaultlatestvalue is assumed. You can provide one or moretparameters. - remote – A Git repository URI or HTTP/HTTPS context URI. If the
URI points to a single text file, the file's contents are placed into
a file called
Dockerfileand the image is built from that file. If the URI points to a tarball, the file is downloaded by the daemon and the contents therein used as the context for the build. If the URI points to a tarball and thedockerfileparameter is also specified, there must be a file with the corresponding path inside the tarball. - q – Suppress verbose build output.
- nocache – Do not use the cache when building the image.
- pull - Attempt to pull the image even if an older image exists locally.
- rm - Remove intermediate containers after a successful build (default behavior).
- forcerm - Always remove intermediate containers (includes
rm). - memory - Set memory limit for build.
- memswap - Total memory (memory + swap),
-1to enable unlimited swap. - cpushares - CPU shares (relative weight).
- cpusetcpus - CPUs in which to allow execution (e.g.,
0-3,0,1). - cpuperiod - The length of a CPU period in microseconds.
- cpuquota - Microseconds of CPU time that the container can get in a CPU period.
- buildargs – JSON map of string pairs for build-time variables. Users pass
these values at build-time. Docker uses the
buildargsas the environment context for command(s) run via the Dockerfile'sRUNinstruction or for variable expansion in other Dockerfile instructions. This is not meant for passing secret values. Read more about the buildargs instruction - shmsize - Size of
/dev/shmin bytes. The size must be greater than 0. If omitted the system uses 64MB.
Request Headers:
-
Content-type – Set to
"application/x-tar". -
X-Registry-Config – A base64-url-safe-encoded Registry Auth Config JSON object with the following structure:
{ "docker.example.com": { "username": "janedoe", "password": "hunter2" }, "https://index.docker.io/v1/": { "username": "mobydock", "password": "conta1n3rize14" } }This object maps the hostname of a registry to an object containing the "username" and "password" for that registry. Multiple registries may be specified as the build may be based on an image requiring authentication to pull from any arbitrary registry. Only the registry domain name (and port if not the default "443") are required. However (for legacy reasons) the "official" Docker, Inc. hosted registry must be specified with both a "https://" prefix and a "/v1/" suffix even though Docker will prefer to use the v2 registry API.
Status codes:
- 200 – no error
- 500 – server error
Create an image
POST /images/create
Create an image either by pulling it from the registry or by importing it
Example request:
POST /v1.22/images/create?fromImage=busybox&tag=latest 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. The name may include a tag or digest. This parameter may only be used when pulling an image. The pull is cancelled if the HTTP connection is closed.
- fromSrc – Source to import. The value may be a URL from which the image
can be retrieved or
-to read the image from the request body. This parameter may only be used when importing an image. - repo – Repository name given to an image when it is imported. The repo may include a tag. This parameter may only be used when importing an image.
- tag – Tag or digest. If empty when pulling an image, this causes all tags for the given image to be pulled.
Request Headers:
-
X-Registry-Auth – base64-encoded AuthConfig object, containing either login information, or a token
-
Credential based login:
{ "username": "jdoe", "password": "secret", "email": "jdoe@acme.com" } ```
-
Token based login:
{ "registrytoken": "9cbaf023786cd7..." } ```
-
Status codes:
- 200 – no error
- 404 - repository does not exist or no read access
- 500 – server error
Inspect an image
GET /images/(name)/json
Return low-level information on the image name
Example request:
GET /v1.22/images/example/json HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Id" : "85f05633ddc1c50679be2b16a0479ab6f7637f8884e0cfe0f4d20e1ebb3d6e7c",
"Container" : "cb91e48a60d01f1e27028b4fc6819f4f290b3cf12496c8176ec714d0d390984a",
"Comment" : "",
"Os" : "linux",
"Architecture" : "amd64",
"Parent" : "91e54dfb11794fad694460162bf0cb0a4fa710cfa3f60979c177d920813e267c",
"ContainerConfig" : {
"Tty" : false,
"Hostname" : "e611e15f9c9d",
"Volumes" : null,
"Domainname" : "",
"AttachStdout" : false,
"PublishService" : "",
"AttachStdin" : false,
"OpenStdin" : false,
"StdinOnce" : false,
"NetworkDisabled" : false,
"OnBuild" : [],
"Image" : "91e54dfb11794fad694460162bf0cb0a4fa710cfa3f60979c177d920813e267c",
"User" : "",
"WorkingDir" : "",
"Entrypoint" : null,
"MacAddress" : "",
"AttachStderr" : false,
"Labels" : {
"com.example.license" : "GPL",
"com.example.version" : "1.0",
"com.example.vendor" : "Acme"
},
"Env" : [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"ExposedPorts" : null,
"Cmd" : [
"/bin/sh",
"-c",
"#(nop) LABEL com.example.vendor=Acme com.example.license=GPL com.example.version=1.0"
]
},
"DockerVersion" : "1.9.0-dev",
"VirtualSize" : 188359297,
"Size" : 0,
"Author" : "",
"Created" : "2015-09-10T08:30:53.26995814Z",
"GraphDriver" : {
"Name" : "aufs",
"Data" : null
},
"RepoDigests" : [
"localhost:5000/test/busybox/example@sha256:cbbf2f9a99b47fc460d422812b6a5adff7dfee951d8fa2e4a98caa0382cfbdbf"
],
"RepoTags" : [
"example:1.0",
"example:latest",
"example:stable"
],
"Config" : {
"Image" : "91e54dfb11794fad694460162bf0cb0a4fa710cfa3f60979c177d920813e267c",
"NetworkDisabled" : false,
"OnBuild" : [],
"StdinOnce" : false,
"PublishService" : "",
"AttachStdin" : false,
"OpenStdin" : false,
"Domainname" : "",
"AttachStdout" : false,
"Tty" : false,
"Hostname" : "e611e15f9c9d",
"Volumes" : null,
"Cmd" : [
"/bin/bash"
],
"ExposedPorts" : null,
"Env" : [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Labels" : {
"com.example.vendor" : "Acme",
"com.example.version" : "1.0",
"com.example.license" : "GPL"
},
"Entrypoint" : null,
"MacAddress" : "",
"AttachStderr" : false,
"WorkingDir" : "",
"User" : ""
}
}
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 /v1.22/images/ubuntu/history HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
[
{
"Id": "3db9c44f45209632d6050b35958829c3a2aa256d81b9a7be45b362ff85c54710",
"Created": 1398108230,
"CreatedBy": "/bin/sh -c #(nop) ADD file:eb15dbd63394e063b805a3c32ca7bf0266ef64676d5a6fab4801f2e81e2a5148 in /",
"Tags": [
"ubuntu:lucid",
"ubuntu:10.04"
],
"Size": 182964289,
"Comment": ""
},
{
"Id": "6cfa4d1f33fb861d4d114f43b25abd0ac737509268065cdfd69d544a59c85ab8",
"Created": 1398108222,
"CreatedBy": "/bin/sh -c #(nop) MAINTAINER Tianon Gravi <admwiggin@gmail.com> - mkimage-debootstrap.sh -i iproute,iputils-ping,ubuntu-minimal -t lucid.tar.xz lucid http://archive.ubuntu.com/ubuntu/",
"Tags": null,
"Size": 0,
"Comment": ""
},
{
"Id": "511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158",
"Created": 1371157430,
"CreatedBy": "",
"Tags": [
"scratch12:latest",
"scratch:latest"
],
"Size": 0,
"Comment": "Imported from -"
}
]
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 /v1.22/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..."}
...
If you wish to push an image on to a private registry, that image must already have a tag
into a repository which references that registry hostname and port. This repository name should
then be used in the URL. This duplicates the command line's flow.
The push is cancelled if the HTTP connection is closed.
Example request:
POST /v1.22/images/registry.acme.com:5000/test/push HTTP/1.1
Query parameters:
- tag – The tag to associate with the image on the registry. This is optional.
Request Headers:
-
X-Registry-Auth – base64-encoded AuthConfig object, containing either login information, or a token
-
Credential based login:
{ "username": "jdoe", "password": "secret", "email": "jdoe@acme.com", } ```
-
Token based login:
{ "registrytoken": "9cbaf023786cd7..." } ```
-
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 /v1.22/images/test/tag?repo=myrepo&force=0&tag=v42 HTTP/1.1
Example response:
HTTP/1.1 201 Created
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
- 409 – conflict
- 500 – server error
Remove an image
DELETE /images/(name)
Remove the image name from the filesystem
Example request:
DELETE /v1.22/images/test HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-type: application/json
[
{"Untagged": "3e2f21a89f"},
{"Deleted": "3e2f21a89f"},
{"Deleted": "53b4f83ac9"}
]
Query parameters:
- force – 1/True/true or 0/False/false, default false
- noprune – 1/True/true or 0/False/false, default false
Status codes:
- 200 – no error
- 404 – no such image
- 409 – conflict
- 500 – server error
Search images
GET /images/search
Search for an image on Docker Hub.
Note
: 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 /v1.22/images/search?term=sshd HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
[
{
"description": "",
"is_official": false,
"is_automated": false,
"name": "wma55/u1210sshd",
"star_count": 0
},
{
"description": "",
"is_official": false,
"is_automated": false,
"name": "jdswinbank/sshd",
"star_count": 0
},
{
"description": "",
"is_official": false,
"is_automated": false,
"name": "vgauthier/sshd",
"star_count": 0
}
...
]
Query parameters:
- term – term to search
Status codes:
- 200 – no error
- 500 – server error
2.3 Misc
Check auth configuration
POST /auth
Get the default username and email
Example request:
POST /v1.22/auth HTTP/1.1
Content-Type: application/json
Content-Length: 12345
{
"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 /v1.22/info HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Architecture": "x86_64",
"ClusterStore": "etcd://localhost:2379",
"Containers": 11,
"ContainersRunning": 7,
"ContainersStopped": 3,
"ContainersPaused": 1,
"CpuCfsPeriod": true,
"CpuCfsQuota": true,
"Debug": false,
"DockerRootDir": "/var/lib/docker",
"Driver": "btrfs",
"DriverStatus": [[""]],
"ExecutionDriver": "native-0.1",
"ExperimentalBuild": false,
"HttpProxy": "http://test:test@localhost:8080",
"HttpsProxy": "https://test:test@localhost:8080",
"ID": "7TRN:IPZB:QYBB:VPBQ:UMPP:KARE:6ZNR:XE6T:7EWV:PKF4:ZOJD:TPYS",
"IPv4Forwarding": true,
"Images": 16,
"IndexServerAddress": "https://index.docker.io/v1/",
"InitPath": "/usr/bin/docker",
"InitSha1": "",
"KernelVersion": "3.12.0-1-amd64",
"Labels": [
"storage=ssd"
],
"MemTotal": 2099236864,
"MemoryLimit": true,
"NCPU": 1,
"NEventsListener": 0,
"NFd": 11,
"NGoroutines": 21,
"Name": "prod-server-42",
"NoProxy": "9.81.1.160",
"OomKillDisable": true,
"OSType": "linux",
"OperatingSystem": "Boot2Docker",
"Plugins": {
"Volume": [
"local"
],
"Network": [
"null",
"host",
"bridge"
]
},
"RegistryConfig": {
"IndexConfigs": {
"docker.io": {
"Mirrors": null,
"Name": "docker.io",
"Official": true,
"Secure": true
}
},
"InsecureRegistryCIDRs": [
"127.0.0.0/8"
]
},
"ServerVersion": "1.9.0",
"SwapLimit": false,
"SystemStatus": [["State", "Healthy"]],
"SystemTime": "2015-03-10T11:11:23.730591467-07:00"
}
Status codes:
- 200 – no error
- 500 – server error
Show the docker version information
GET /version
Show the docker version information
Example request:
GET /v1.22/version HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Version": "1.10.0",
"Os": "linux",
"KernelVersion": "3.19.0-23-generic",
"GoVersion": "go1.4.2",
"GitCommit": "e75da4b",
"Arch": "amd64",
"ApiVersion": "1.22",
"BuildTime": "2015-12-01T07:09:13.444803460+00:00",
"Experimental": true
}
Status codes:
- 200 – no error
- 500 – server error
Ping the docker server
GET /_ping
Ping the docker server
Example request:
GET /v1.22/_ping HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: text/plain
OK
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 /v1.22/commit?container=44c004db4b17&comment=message&repo=myrepo HTTP/1.1
Content-Type: application/json
Content-Length: 12345
{
"Hostname": "",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": true,
"AttachStderr": true,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": null,
"Cmd": [
"date"
],
"Mounts": [
{
"Source": "/data",
"Destination": "/data",
"Mode": "ro,Z",
"RW": false
}
],
"Labels": {
"key1": "value1",
"key2": "value2"
},
"WorkingDir": "",
"NetworkDisabled": false,
"ExposedPorts": {
"22/tcp": {}
}
}
Example response:
HTTP/1.1 201 Created
Content-Type: application/json
{"Id": "596069db4bf5"}
JSON parameters:
- config - the container's configuration
Query parameters:
- container – source container
- repo – repository
- tag – tag
- comment – commit message
- author – author (e.g., "John Hannibal Smith <hannibal@a-team.com>")
- pause – 1/True/true or 0/False/false, whether to pause the container before committing
- changes – Dockerfile instructions to apply while committing
Status codes:
- 201 – no error
- 404 – no such container
- 500 – server error
Monitor Docker's events
GET /events
Get container events from docker, in real time via streaming.
Docker containers report the following events:
attach, commit, copy, create, destroy, die, exec_create, exec_start, export, kill, oom, pause, rename, resize, restart, start, stop, top, unpause, update
Docker images report the following events:
delete, import, pull, push, tag, untag
Docker volumes report the following events:
create, mount, unmount, destroy
Docker networks report the following events:
create, connect, disconnect, destroy
Example request:
GET /v1.22/events?since=1374067924
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
Server: Docker/1.10.0 (linux)
Date: Fri, 29 Apr 2016 15:18:06 GMT
Transfer-Encoding: chunked
{
"status": "pull",
"id": "alpine:latest",
"Type": "image",
"Action": "pull",
"Actor": {
"ID": "alpine:latest",
"Attributes": {
"name": "alpine"
}
},
"time": 1461943101,
"timeNano": 1461943101301854122
}
{
"status": "create",
"id": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"from": "alpine",
"Type": "container",
"Action": "create",
"Actor": {
"ID": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"Attributes": {
"com.example.some-label": "some-label-value",
"image": "alpine",
"name": "my-container"
}
},
"time": 1461943101,
"timeNano": 1461943101381709551
}
{
"status": "attach",
"id": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"from": "alpine",
"Type": "container",
"Action": "attach",
"Actor": {
"ID": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"Attributes": {
"com.example.some-label": "some-label-value",
"image": "alpine",
"name": "my-container"
}
},
"time": 1461943101,
"timeNano": 1461943101383858412
}
{
"Type": "network",
"Action": "connect",
"Actor": {
"ID": "7dc8ac97d5d29ef6c31b6052f3938c1e8f2749abbd17d1bd1febf2608db1b474",
"Attributes": {
"container": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"name": "bridge",
"type": "bridge"
}
},
"time": 1461943101,
"timeNano": 1461943101394865557
}
{
"status": "start",
"id": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"from": "alpine",
"Type": "container",
"Action": "start",
"Actor": {
"ID": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"Attributes": {
"com.example.some-label": "some-label-value",
"image": "alpine",
"name": "my-container"
}
},
"time": 1461943101,
"timeNano": 1461943101607533796
}
{
"status": "resize",
"id": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"from": "alpine",
"Type": "container",
"Action": "resize",
"Actor": {
"ID": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"Attributes": {
"com.example.some-label": "some-label-value",
"height": "46",
"image": "alpine",
"name": "my-container",
"width": "204"
}
},
"time": 1461943101,
"timeNano": 1461943101610269268
}
{
"status": "die",
"id": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"from": "alpine",
"Type": "container",
"Action": "die",
"Actor": {
"ID": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"Attributes": {
"com.example.some-label": "some-label-value",
"exitCode": "0",
"image": "alpine",
"name": "my-container"
}
},
"time": 1461943105,
"timeNano": 1461943105079144137
}
{
"Type": "network",
"Action": "disconnect",
"Actor": {
"ID": "7dc8ac97d5d29ef6c31b6052f3938c1e8f2749abbd17d1bd1febf2608db1b474",
"Attributes": {
"container": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"name": "bridge",
"type": "bridge"
}
},
"time": 1461943105,
"timeNano": 1461943105230860245
}
{
"status": "destroy",
"id": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"from": "alpine",
"Type": "container",
"Action": "destroy",
"Actor": {
"ID": "ede54ee1afda366ab42f824e8a5ffd195155d853ceaec74a927f249ea270c743",
"Attributes": {
"com.example.some-label": "some-label-value",
"image": "alpine",
"name": "my-container"
}
},
"time": 1461943105,
"timeNano": 1461943105338056026
}
Query parameters:
- since – Timestamp. Show all events created since timestamp and then stream
- until – Timestamp. Show events created until given timestamp and stop streaming
- filters – A json encoded value of the filters (a map[string][]string) to process on the event list. Available filters:
container=<string>; -- container to filterevent=<string>; -- event to filterimage=<string>; -- image to filterlabel=<string>; -- image and container label to filtertype=<string>; -- eithercontainerorimageorvolumeornetworkvolume=<string>; -- volume to filternetwork=<string>; -- network to filter
Status codes:
- 200 – no error
- 500 – server error
Get a tarball containing all images in a repository
GET /images/(name)/get
Get a tarball containing all images and metadata for the repository specified
by name.
If name is a specific name and tag (e.g. ubuntu:latest), then only that image
(and its parents) are returned. If name is an image ID, similarly only that
image (and its parents) are returned, but with the exclusion of the
'repositories' file in the tarball, as there were no image names referenced.
See the image tarball format for more details.
Example request
GET /v1.22/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
Get a tarball containing all images
GET /images/get
Get a tarball containing all images and metadata for one or more repositories.
For each value of the names parameter: if it is a specific name and tag (e.g.
ubuntu:latest), then only that image (and its parents) are returned; if it is
an image ID, similarly only that image (and its parents) are returned and there
would be no names referenced in the 'repositories' file for this image ID.
See the image tarball format for more details.
Example request
GET /v1.22/images/get?names=myname%2Fmyapp%3Alatest&names=busybox
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 a Docker repository. See the image tarball format for more details.
Example request
POST /v1.22/images/load
Content-Type: application/x-tar
Content-Length: 12345
Tarball in body
Example response:
HTTP/1.1 200 OK
Status codes:
- 200 – no error
- 500 – server error
Image tarball format
An image tarball contains one directory per image layer (named using its long ID), each containing these files:
VERSION: currently1.0- the file format versionjson: detailed layer information, similar todocker inspect layer_idlayer.tar: A tarfile containing the filesystem changes in this layer
The layer.tar file contains aufs style .wh..wh.aufs files and directories
for storing attribute changes and deletions.
If the tarball defines a repository, the tarball should also include a repositories file at
the root that contains a list of repository and tag names mapped to layer IDs.
{"hello-world":
{"latest": "565a9d68a73f6706862bfe8409a7f659776d4d60a8d096eb4a3cbce6999cc2a1"}
}
Exec Create
POST /containers/(id or name)/exec
Sets up an exec instance in a running container id
Example request:
POST /v1.22/containers/e90e34656806/exec HTTP/1.1
Content-Type: application/json
Content-Length: 12345
{
"AttachStdin": true,
"AttachStdout": true,
"AttachStderr": true,
"Cmd": ["sh"],
"DetachKeys": "ctrl-p,ctrl-q",
"Privileged": true,
"Tty": true,
"User": "123:456"
}
Example response:
HTTP/1.1 201 Created
Content-Type: application/json
{
"Id": "f90e34656806",
"Warnings":[]
}
JSON parameters:
- AttachStdin - Boolean value, attaches to
stdinof theexeccommand. - AttachStdout - Boolean value, attaches to
stdoutof theexeccommand. - AttachStderr - Boolean value, attaches to
stderrof theexeccommand. - DetachKeys – Override the key sequence for detaching a
container. Format is a single character
[a-Z]orctrl-<value>where<value>is one of:a-z,@,^,[,,or_. - Tty - Boolean value to allocate a pseudo-TTY.
- Cmd - Command to run specified as a string or an array of strings.
- Privileged - Boolean value, runs the exec process with extended privileges.
- User - A string value specifying the user, and optionally, group to run
the exec process inside the container. Format is one of:
"user","user:group","uid", or"uid:gid".
Status codes:
- 201 – no error
- 404 – no such container
- 409 - container is paused
- 500 - server error
Exec Start
POST /exec/(id)/start
Starts a previously set up exec instance id. If detach is true, this API
returns after starting the exec command. Otherwise, this API sets up an
interactive session with the exec command.
Example request:
POST /v1.22/exec/e90e34656806/start HTTP/1.1
Content-Type: application/json
Content-Length: 12345
{
"Detach": false,
"Tty": false
}
Example response:
HTTP/1.1 200 OK
Content-Type: application/vnd.docker.raw-stream
{% raw %}
{{ STREAM }}
{% endraw %}
JSON parameters:
- Detach - Detach from the
execcommand. - Tty - Boolean value to allocate a pseudo-TTY.
Status codes:
- 200 – no error
- 404 – no such exec instance
- 409 - container is paused
Stream details:
Similar to the stream behavior of POST /containers/(id or name)/attach API
Exec Resize
POST /exec/(id)/resize
Resizes the tty session used by the exec command id. The unit is number of characters.
This API is valid only if tty was specified as part of creating and starting the exec command.
Example request:
POST /v1.22/exec/e90e34656806/resize?h=40&w=80 HTTP/1.1
Content-Type: text/plain
Example response:
HTTP/1.1 201 Created
Content-Type: text/plain
Query parameters:
- h – height of
ttysession - w – width
Status codes:
- 201 – no error
- 404 – no such exec instance
Exec Inspect
GET /exec/(id)/json
Return low-level information about the exec command id.
Example request:
GET /v1.22/exec/11fb006128e8ceb3942e7c58d77750f24210e35f879dd204ac975c184b820b39/json HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"CanRemove": false,
"ContainerID": "b53ee82b53a40c7dca428523e34f741f3abc51d9f297a14ff874bf761b995126",
"DetachKeys": "",
"ExitCode": 2,
"ID": "f33bbfb39f5b142420f4759b2348913bd4a8d1a6d7fd56499cb41a1bb91d7b3b",
"OpenStderr": true,
"OpenStdin": true,
"OpenStdout": true,
"ProcessConfig": {
"arguments": [
"-c",
"exit 2"
],
"entrypoint": "sh",
"privileged": false,
"tty": true,
"user": "1000"
},
"Running": false
}
Status codes:
- 200 – no error
- 404 – no such exec instance
- 500 - server error
2.4 Volumes
List volumes
GET /volumes
Example request:
GET /v1.22/volumes HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Volumes": [
{
"Name": "tardis",
"Driver": "local",
"Mountpoint": "/var/lib/docker/volumes/tardis"
}
],
"Warnings": []
}
Query parameters:
- filters - JSON encoded value of the filters (a
map[string][]string) to process on the volumes list. There is one available filter:dangling=true
Status codes:
- 200 - no error
- 500 - server error
Create a volume
POST /volumes/create
Create a volume
Example request:
POST /v1.22/volumes/create HTTP/1.1
Content-Type: application/json
Content-Length: 12345
{
"Name": "tardis"
}
Example response:
HTTP/1.1 201 Created
Content-Type: application/json
{
"Name": "tardis",
"Driver": "local",
"Mountpoint": "/var/lib/docker/volumes/tardis"
}
Status codes:
- 201 - no error
- 500 - server error
JSON parameters:
- Name - The new volume's name. If not specified, Docker generates a name.
- Driver - Name of the volume driver to use. Defaults to
localfor the name. - DriverOpts - A mapping of driver options and values. These options are passed directly to the driver and are driver specific.
Inspect a volume
GET /volumes/(name)
Return low-level information on the volume name
Example request:
GET /volumes/tardis
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Name": "tardis",
"Driver": "local",
"Mountpoint": "/var/lib/docker/volumes/tardis"
}
Status codes:
- 200 - no error
- 404 - no such volume
- 500 - server error
Remove a volume
DELETE /volumes/(name)
Instruct the driver to remove the volume (name).
Example request:
DELETE /v1.22/volumes/tardis HTTP/1.1
Example response:
HTTP/1.1 204 No Content
Status codes:
- 204 - no error
- 404 - no such volume or volume driver
- 409 - volume is in use and cannot be removed
- 500 - server error
2.5 Networks
List networks
GET /networks
Example request:
GET /v1.22/networks?filters={"type":{"custom":true}} HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
[
{
"Name": "bridge",
"Id": "f2de39df4171b0dc801e8002d1d999b77256983dfc63041c0f34030aa3977566",
"Scope": "local",
"Driver": "bridge",
"IPAM": {
"Driver": "default",
"Config": [
{
"Subnet": "172.17.0.0/16"
}
]
},
"Containers": {
"39b69226f9d79f5634485fb236a23b2fe4e96a0a94128390a7fbbcc167065867": {
"EndpointID": "ed2419a97c1d9954d05b46e462e7002ea552f216e9b136b80a7db8d98b442eda",
"MacAddress": "02:42:ac:11:00:02",
"IPv4Address": "172.17.0.2/16",
"IPv6Address": ""
}
},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
}
},
{
"Name": "none",
"Id": "e086a3893b05ab69242d3c44e49483a3bbbd3a26b46baa8f61ab797c1088d794",
"Scope": "local",
"Driver": "null",
"IPAM": {
"Driver": "default",
"Config": []
},
"Containers": {},
"Options": {}
},
{
"Name": "host",
"Id": "13e871235c677f196c4e1ecebb9dc733b9b2d2ab589e30c539efeda84a24215e",
"Scope": "local",
"Driver": "host",
"IPAM": {
"Driver": "default",
"Config": []
},
"Containers": {},
"Options": {}
}
]
Query parameters:
- filters - JSON encoded network list filter. The filter value is one of:
id=<network-id>Matches all or part of a network id.name=<network-name>Matches all or part of a network name.type=["custom"|"builtin"]Filters networks by type. Thecustomkeyword returns all user-defined networks.
Status codes:
- 200 - no error
- 500 - server error
Inspect network
GET /networks/(id or name)
Return low-level information on the network id
Example request:
GET /v1.22/networks/7d86d31b1478e7cca9ebed7e73aa0fdeec46c5ca29497431d3007d2d9e15ed99 HTTP/1.1
Example response:
HTTP/1.1 200 OK
Content-Type: application/json
{
"Name": "net01",
"Id": "7d86d31b1478e7cca9ebed7e73aa0fdeec46c5ca29497431d3007d2d9e15ed99",
"Scope": "local",
"Driver": "bridge",
"IPAM": {
"Driver": "default",
"Config": [
{
"Subnet": "172.19.0.0/16",
"Gateway": "172.19.0.1/16"
}
],
"Options": {
"foo": "bar"
}
},
"Containers": {
"19a4d5d687db25203351ed79d478946f861258f018fe384f229f2efa4b23513c": {
"Name": "test",
"EndpointID": "628cadb8bcb92de107b2a1e516cbffe463e321f548feb37697cce00ad694f21a",
"MacAddress": "02:42:ac:13:00:02",
"IPv4Address": "172.19.0.2/16",
"IPv6Address": ""
}
},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
}
}
Status codes:
- 200 - no error
- 404 - network not found
- 500 - server error
Create a network
POST /networks/create
Create a network
Example request:
POST /v1.22/networks/create HTTP/1.1
Content-Type: application/json
Content-Length: 12345
{
"Name":"isolated_nw",
"CheckDuplicate":true,
"Driver":"bridge",
"IPAM":{
"Driver": "default",
"Config":[
{
"Subnet":"172.20.0.0/16",
"IPRange":"172.20.10.0/24",
"Gateway":"172.20.10.11"
},
{
"Subnet":"2001:db8:abcd::/64",
"Gateway":"2001:db8:abcd::1011"
}
],
"Options": {
"foo": "bar"
}
},
"Internal":true
}
Example response:
HTTP/1.1 201 Created
Content-Type: application/json
{
"Id": "22be93d5babb089c5aab8dbc369042fad48ff791584ca2da2100db837a1c7c30",
"Warning": ""
}
Status codes:
- 201 - no error
- 404 - plugin not found
- 500 - server error
JSON parameters:
- Name - The new network's name. this is a mandatory field
- CheckDuplicate - Requests daemon to check for networks with same name. Defaults to
false. Since Network is primarily keyed based on a random ID and not on the name, and network name is strictly a user-friendly alias to the network which is uniquely identified using ID, there is no guaranteed way to check for duplicates. This parameter CheckDuplicate is there to provide a best effort checking of any networks which has the same name but it is not guaranteed to catch all name collisions. - Driver - Name of the network driver plugin to use. Defaults to
bridgedriver - IPAM - Optional custom IP scheme for the network
- Driver - Name of the IPAM driver to use. Defaults to
defaultdriver - Config - List of IPAM configuration options, specified as a map:
{"Subnet": <CIDR>, "IPRange": <CIDR>, "Gateway": <IP address>, "AuxAddress": <device_name:IP address>} - Options - Driver-specific options, specified as a map:
{"option":"value" [,"option2":"value2"]}
- Driver - Name of the IPAM driver to use. Defaults to
- Options - Network specific options to be used by the drivers
Connect a container to a network
POST /networks/(id or name)/connect
Connect a container to a network
Example request:
POST /v1.22/networks/22be93d5babb089c5aab8dbc369042fad48ff791584ca2da2100db837a1c7c30/connect HTTP/1.1
Content-Type: application/json
Content-Length: 12345
{
"Container":"3613f73ba0e4",
"EndpointConfig": {
"IPAMConfig": {
"IPv4Address":"172.24.56.89",
"IPv6Address":"2001:db8::5689"
}
}
}
Example response:
HTTP/1.1 200 OK
Status codes:
- 200 - no error
- 404 - network or container is not found
- 500 - Internal Server Error
JSON parameters:
- container - container-id/name to be connected to the network
Disconnect a container from a network
POST /networks/(id or name)/disconnect
Disconnect a container from a network
Example request:
POST /v1.22/networks/22be93d5babb089c5aab8dbc369042fad48ff791584ca2da2100db837a1c7c30/disconnect HTTP/1.1
Content-Type: application/json
Content-Length: 12345
{
"Container":"3613f73ba0e4",
"Force":false
}
Example response:
HTTP/1.1 200 OK
Status codes:
- 200 - no error
- 404 - network or container not found
- 500 - Internal Server Error
JSON parameters:
- Container - container-id/name to be disconnected from a network
- Force - Force the container to disconnect from a network
Remove a network
DELETE /networks/(id or name)
Instruct the driver to remove the network (id).
Example request:
DELETE /v1.22/networks/22be93d5babb089c5aab8dbc369042fad48ff791584ca2da2100db837a1c7c30 HTTP/1.1
Example response:
HTTP/1.1 200 OK
Status codes:
- 200 - no error
- 403 - operation not supported for pre-defined networks
- 404 - no such network
- 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 havestdoutandstderrfrom the container's start) andstream=1 -
If in detached mode or only
stdinis 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.
To hint potential proxies about connection hijacking, Docker client sends connection upgrade headers similarly to websocket.
Upgrade: tcp
Connection: Upgrade
When Docker daemon detects the Upgrade header, it switches its status code
from 200 OK to 101 UPGRADED and resends the same headers.
3.3 CORS Requests
To set cross origin requests to the Engine API please give values to
--api-cors-header when running Docker in daemon mode. Set * (asterisk) allows all,
default or blank means CORS disabled
$ dockerd -H="192.168.1.9:2375" --api-cors-header="http://foo.bar"