Docker Remote API v1.24

1. Brief introduction

  • The Remote API has replaced rcli.
  • The daemon listens on unix:///var/run/docker.sock but you can Bind Docker to another host/port or a Unix socket.
  • The API tends to be REST. However, for some complex commands, like attach or pull, the HTTP connection is hijacked to transport stdout, stdin and stderr.
  • When the client API version is newer than the daemon’s, these calls return an HTTP 400 Bad Request error message.

2. Errors

The Remote API uses standard HTTP status codes to indicate the success or failure of the API call. The body of the response will be JSON in the following format:

{
    "message": "page not found"
}

The status codes that are returned for each endpoint are specified in the endpoint documentation below.

3. Endpoints

3.1 Containers

List containers

GET /containers/json

List containers

Запрос:

GET /containers/json?all=1&before=8dfafdbc3a40&size=1 HTTP/1.1

Ответ:

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

[
     {
             "Id": "8dfafdbc3a40",
             "Names":["/boring_feynman"],
             "Image": "ubuntu:latest",
             "ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
             "Command": "echo 1",
             "Created": 1367854155,
             "State": "Exited",
             "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"
                              }
                     }
             },
             "Mounts": [
                     {
                              "Name": "fac362...80535",
                              "Source": "/data",
                              "Destination": "/data",
                              "Driver": "local",
                              "Mode": "ro,Z",
                              "RW": false,
                              "Propagation": ""
                     }
             ]
     },
     {
             "Id": "9cd87474be90",
             "Names":["/coolName"],
             "Image": "ubuntu:latest",
             "ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
             "Command": "echo 222222",
             "Created": 1367854155,
             "State": "Exited",
             "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"
                              }
                     }
             },
             "Mounts": []
     },
     {
             "Id": "3176a2479c92",
             "Names":["/sleepy_dog"],
             "Image": "ubuntu:latest",
             "ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
             "Command": "echo 3333333333333333",
             "Created": 1367854154,
             "State": "Exited",
             "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"
                              }
                     }
             },
             "Mounts": []
     },
     {
             "Id": "4cb07b47f9fb",
             "Names":["/running_cat"],
             "Image": "ubuntu:latest",
             "ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
             "Command": "echo 444444444444444444444444444444444",
             "Created": 1367854152,
             "State": "Exited",
             "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"
                              }
                     }
             },
             "Mounts": []
     }
]

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 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
  • 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=key or label="key=value" of a container label
    • isolation=(default|process|hyperv) (Windows daemon only)
    • ancestor=(<image-name>[:<tag>], <image id> or <image@digest>)
    • before=(<container id> or <container name>)
    • since=(<container id> or <container name>)
    • volume=(<volume name> or <mount point destination>)
    • network=(<network id> or <network name>)

Status codes:

  • 200 – no error
  • 400 – bad parameter
  • 500 – server error

Create a container

POST /containers/create

Create a container

Запрос:

POST /containers/create HTTP/1.1
Content-Type: application/json

{
       "Hostname": "",
       "Domainname": "",
       "User": "",
       "AttachStdin": false,
       "AttachStdout": true,
       "AttachStderr": true,
       "Tty": false,
       "OpenStdin": false,
       "StdinOnce": false,
       "Env": [
               "FOO=bar",
               "BAZ=quux"
       ],
       "Cmd": [
               "date"
       ],
       "Entrypoint": "",
       "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"],
         "Links": ["redis3:redis"],
         "Memory": 0,
         "MemorySwap": 0,
         "MemoryReservation": 0,
         "KernelMemory": 0,
         "CpuPercent": 80,
         "CpuShares": 512,
         "CpuPeriod": 100000,
         "CpuQuota": 50000,
         "CpusetCpus": "0,1",
         "CpusetMems": "0,1",
         "MaximumIOps": 0,
         "MaximumIOBps": 0,
         "BlkioWeight": 300,
         "BlkioWeightDevice": [{}],
         "BlkioDeviceReadBps": [{}],
         "BlkioDeviceReadIOps": [{}],
         "BlkioDeviceWriteBps": [{}],
         "BlkioDeviceWriteIOps": [{}],
         "MemorySwappiness": 60,
         "OomKillDisable": false,
         "OomScoreAdj": 500,
         "PidMode": "",
         "PidsLimit": -1,
         "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": [],
         "Sysctls": { "net.ipv4.ip_forward": "1" },
         "Ulimits": [{}],
         "LogConfig": { "Type": "json-file", "Config": {} },
         "SecurityOpt": [],
         "StorageOpt": {},
         "CgroupParent": "",
         "VolumeDriver": "",
         "ShmSize": 67108864
      },
      "NetworkingConfig": {
          "EndpointsConfig": {
              "isolated_nw" : {
                  "IPAMConfig": {
                      "IPv4Address":"172.20.30.33",
                      "IPv6Address":"2001:db8:abcd::3033",
                      "LinkLocalIPs":["169.254.34.68", "fe80::3468"]
                  },
                  "Links":["container_1", "container_2"],
                  "Aliases":["server_x", "server_y"]
              }
          }
      }
  }

Ответ:

  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. This must be a valid RFC 1123 hostname.
  • 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, including stdin if it is not closed.
  • OpenStdin - Boolean value, opens stdin,
  • StdinOnce - Boolean value, close stdin after the 1 attached client disconnects.
  • Env - A list of environment variables in the form of ["VAR=value"[,"VAR2=value2"]]
  • Labels - Adds a map of labels to a container. To specify a map: {"key":"value"[,"key2":"value2"]}
  • 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. SIGTERM by default.
  • HostConfig
    • Binds – A list of volume bindings for this container. Each volume binding is a string in one of these forms:
      • host_path:container_path to bind-mount a host path into the container
      • host_path:container_path:ro to make the bind-mount read-only inside the container.
      • volume_name:container_path to bind-mount a volume managed by a volume plugin into the container.
      • volume_name:container_path:ro to make the bind mount read-only inside the container.
    • 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 -1 to enable unlimited swap. You must use this with memory and make the swap value larger than memory.
    • MemoryReservation - Memory soft limit in bytes.
    • KernelMemory - Kernel memory limit in bytes.
    • CpuPercent - An integer value containing the usable percentage of the available CPUs. (Windows daemon only)
    • 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 CpusetCpus to use.
    • CpusetMems - Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only effective on NUMA systems.
    • MaximumIOps - Maximum IO absolute rate in terms of IOps.
    • MaximumIOBps - Maximum IO absolute rate in terms of bytes per second.
    • 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"}]
    • BlkioDeviceWiiteIOps - 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
    • PidsLimit - Tune a container’s pids limit. Set -1 for unlimited.
    • 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 that port is 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/hosts file. 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 Name property 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. If on-failure is used, MaximumRetryCount controls 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.
    • UsernsMode - Sets the usernamespace mode for the container when usernamespace remapping option is enabled. supported values are: host.
    • NetworkMode - Sets the networking mode for the container. Supported standard values are: bridge, host, none, and container:<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 }
    • Sysctls - A list of kernel parameters (sysctls) to set in the container, specified as { <name>: <Value> }, for example: { "net.ipv4.ip_forward": "1" }
    • SecurityOpt: A list of string values to customize labels for MLS systems, such as SELinux.
    • StorageOpt: Storage driver options per container. Options can be passed in the form {"size":"120G"}
    • 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, fluentd, awslogs, splunk, etwlogs, none. json-file logging driver.
    • CgroupParent - Path to cgroups under which the container’s cgroup is created. If the path is not absolute, the path is considered to be relative to the cgroups path 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/shm in bytes. The size must be greater than 0. If omitted the system uses 64MB.

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

Запрос:

  GET /containers/4fa6e0f0c678/json HTTP/1.1

Ответ:

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,
        "MaximumIOps": 0,
        "MaximumIOBps": 0,
        "BlkioWeight": 0,
        "BlkioWeightDevice": [{}],
        "BlkioDeviceReadBps": [{}],
        "BlkioDeviceWriteBps": [{}],
        "BlkioDeviceReadIOps": [{}],
        "BlkioDeviceWriteIOps": [{}],
        "CapAdd": null,
        "CapDrop": null,
        "ContainerIDFile": "",
        "CpusetCpus": "",
        "CpusetMems": "",
        "CpuPercent": 80,
        "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,
        "Sysctls": {
                "net.ipv4.ip_forward": "1"
        },
        "StorageOpt": 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 /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.

Запрос:

GET /containers/4fa6e0f0c678/top HTTP/1.1

Ответ:

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"
     ]
   ]
}

Запрос:

GET /containers/4fa6e0f0c678/top?ps_args=aux HTTP/1.1

Ответ:

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 – ps arguments 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-file or journald logging drivers.

Запрос:

 GET /containers/4fa6e0f0c678/logs?stderr=1&stdout=1&timestamps=1&follow=1&tail=10&since=1428990821 HTTP/1.1

Ответ:

 HTTP/1.1 101 UPGRADED
 Content-Type: application/vnd.docker.raw-stream
 Connection: Upgrade
 Upgrade: tcp

 {{ STREAM }}

Query parameters:

  • details - 1/True/true or 0/False/flase, Show extra details provided to logs. Default false.
  • follow – 1/True/true or 0/False/false, return stream. Default false.
  • stdout – 1/True/true or 0/False/false, show stdout log. Default false.
  • stderr – 1/True/true or 0/False/false, show stderr log. Default false.
  • 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: all or <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

Запрос:

GET /containers/4fa6e0f0c678/changes HTTP/1.1

Ответ:

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: Modify
  • 1: Add
  • 2: 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

Запрос:

GET /containers/4fa6e0f0c678/export HTTP/1.1

Ответ:

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

{{ TAR STREAM }}

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.

Запрос:

GET /containers/redis1/stats HTTP/1.1

Ответ:

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

  {
     "read" : "2015-01-08T22:57:31.547920715Z",
     "pids_stats": {
        "current": 3
     },
     "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.

Запрос:

  POST /containers/4fa6e0f0c678/resize?h=40&w=80 HTTP/1.1

Ответ:

  HTTP/1.1 200 OK
  Content-Length: 0
  Content-Type: text/plain; charset=utf-8

Query parameters:

  • h – height of tty session
  • 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

Запрос:

POST /containers/e90e34656806/start HTTP/1.1

Ответ:

HTTP/1.1 204 No Content

Query parameters:

  • detachKeys – Override the key sequence for detaching a container. Format is a single character [a-Z] or ctrl-<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

Запрос:

POST /containers/e90e34656806/stop?t=5 HTTP/1.1

Ответ:

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

Запрос:

POST /containers/e90e34656806/restart?t=5 HTTP/1.1

Ответ:

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

Запрос:

POST /containers/e90e34656806/kill HTTP/1.1

Ответ:

HTTP/1.1 204 No Content

Query parameters:

  • signal - Signal to send to the container: integer or string like SIGINT. When not set, SIGKILL is 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 configuration of one or more containers.

Запрос:

   POST /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,
     "RestartPolicy": {
       "MaximumRetryCount": 4,
       "Name": "on-failure"
     },
   }

Ответ:

   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

Запрос:

POST /containers/e90e34656806/rename?name=new_name HTTP/1.1

Ответ:

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

Запрос:

POST /containers/e90e34656806/pause HTTP/1.1

Ответ:

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

Запрос:

POST /containers/e90e34656806/unpause HTTP/1.1

Ответ:

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

Запрос:

POST /containers/16253994b7c4/attach?logs=1&stream=0&stdout=1 HTTP/1.1

Ответ:

HTTP/1.1 101 UPGRADED
Content-Type: application/vnd.docker.raw-stream
Connection: Upgrade
Upgrade: tcp

{{ STREAM }}

Query parameters:

  • detachKeys – Override the key sequence for detaching a container. Format is a single character [a-Z] or ctrl-<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 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:

  • 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 on stdout)

  • 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 /containers/e90e34656806/attach/ws?logs=0&stream=1&stdin=1&stdout=1&stderr=1 HTTP/1.1

Example response

{{ STREAM }}

Query parameters:

  • detachKeys – Override the key sequence for detaching a container. Format is a single character [a-Z] or ctrl-<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 to stdin. Default false.
  • stdout – 1/True/true or 0/False/false, if logs=true, return stdout log, if stream=true, attach to stdout. Default false.
  • stderr – 1/True/true or 0/False/false, if logs=true, return stderr log, if stream=true, attach to stderr. Default false.

Status codes:

  • 200 – no error
  • 400 – bad parameter
  • 404 – no such container
  • 500 – server error

Wait a container

POST /containers/(id or name)/wait

Block until container id stops, then returns the exit code

Запрос:

POST /containers/16253994b7c4/wait HTTP/1.1

Ответ:

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

Запрос:

DELETE /containers/16253994b7c4?v=1 HTTP/1.1

Ответ:

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.

Status codes:

  • 204 – no error
  • 400 – bad parameter
  • 404 – no such container
  • 409 – conflict
  • 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.

Запрос:

GET /containers/8cce319429b2/archive?path=/root HTTP/1.1

Ответ:

HTTP/1.1 200 OK
Content-Type: application/x-tar
X-Docker-Container-Path-Stat: eyJuYW1lIjoicm9vdCIsInNpemUiOjQwOTYsIm1vZGUiOjIxNDc0ODQwOTYsIm10aW1lIjoiMjAxNC0wMi0yN1QyMDo1MToyM1oiLCJsaW5rVGFyZ2V0IjoiIn0=

{{ TAR STREAM }}

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 id does 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.

Запрос:

PUT /containers/8cce319429b2/archive?path=/vol1 HTTP/1.1
Content-Type: application/x-tar

{{ TAR STREAM }}

Ответ:

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 id does not exist)
    • no such file or directory (path resource does not exist)
  • 500 – server error

3.2 Images

List Images

GET /images/json

Запрос:

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

Ответ:

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 /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=true
    • label=key or label="key=value" of an image label
    • before=(<image-name>[:<tag>], <image id> or <image@digest>)
    • since=(<image-name>[:<tag>], <image id> or <image@digest>)
  • filter - only return images with the specified name

Build image from a Dockerfile

POST /build

Build an image from a Dockerfile

Запрос:

POST /build HTTP/1.1

{{ TAR STREAM }}

Ответ:

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

{"stream": "Step 1..."}
{"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 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 if remote is specified and points to an external Dockerfile.
  • t – A name and optional tag to apply to the image in the name:tag format. If you omit the tag the default latest value is assumed. You can provide one or more t parameters.
  • 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 Dockerfile and 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 the dockerfile parameter 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), -1 to 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 buildargs as the environment context for command(s) run via the Dockerfile’s RUN instruction 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/shm in bytes. The size must be greater than 0. If omitted the system uses 64MB.
  • labels – JSON map of string pairs for labels to set on the image.

Request Headers:

  • Content-type – Set to "application/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

Запрос:

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

Ответ:

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.


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