Plugin config

Plugin Config Version 1 of Plugin V2

This document outlines the format of the V0 plugin configuration. The plugin config described herein was introduced in the Docker daemon in the v1.12.0 release.

Plugin configs describe the various constituents of a docker plugin. Plugin configs can be serialized to JSON format with the following media types:

Config Field Descriptions

Config provides the base accessible fields for working with V0 plugin format in the registry.

• description string

  description of the plugin

• documentation string

  link to the documentation about the plugin
  

• interface PluginInterface

  interface implemented by the plugins, struct consisting of the following fields

  • types string array

    types indicate what interface(s) the plugin currently implements.

    currently supported:

    • docker.volumedriver/1.0

    • docker.networkdriver/1.0

    • docker.ipamdriver/1.0

    • docker.authz/1.0

    • docker.logdriver/1.0

    • docker.metricscollector/1.0

  • socket string

    socket is the name of the socket the engine should use to communicate with the plugins. the socket will be created in /run/docker/plugins.

• entrypoint string array

  entrypoint of the plugin, see ENTRYPOINT

• workdir string

  workdir of the plugin, see WORKDIR

• network PluginNetwork

  network of the plugin, struct consisting of the following fields

  • type string

    network type.

    currently supported:

    - **bridge**
    - **host**
    - **none**
    

• mounts PluginMount array

  mount of the plugin, struct consisting of the following fields, see MOUNTS

  • name string

    name of the mount.

  • description string

    description of the mount.

  • source string

    source of the mount.

  • destination string

    destination of the mount.

  • type string

    mount type.

  • options string array

    options of the mount.

• ipchost boolean Access to host ipc namespace.

• pidhost boolean Access to host pid namespace.

• propagatedMount string

  path to be mounted as rshared, so that mounts under that path are visible to docker. This is useful for volume plugins. This path will be bind-mounted outisde of the plugin rootfs so it’s contents are preserved on upgrade.

• env PluginEnv array

  env of the plugin, struct consisting of the following fields

  • name string

    name of the env.

  • description string

    description of the env.

  • value string

    value of the env.

• args PluginArgs

  args of the plugin, struct consisting of the following fields

  • name string

    name of the args.

  • description string

    description of the args.

  • value string array

    values of the args.

• linux PluginLinux

  • capabilities string array

    capabilities of the plugin (Linux only), see list here

  • allowAllDevices boolean

    If /dev is bind mounted from the host, and allowAllDevices is set to true, the plugin will have rwm access to all devices on the host.

  • devices PluginDevice array

    device of the plugin, (Linux only), struct consisting of the following fields, see DEVICES

    • name string

      name of the device.

    • description string

      description of the device.

    • path string

      path of the device.

Example Config

Example showing the ‘tiborvass/sample-volume-plugin’ plugin config.

{
            "Args": {
                "Description": "",
                "Name": "",
                "Settable": null,
                "Value": null
            },
            "Description": "A sample volume plugin for Docker",
            "Documentation": "https://docs.docker.com/engine/extend/plugins/",
            "Entrypoint": [
                "/usr/bin/sample-volume-plugin",
                "/data"
            ],
            "Env": [
                {
                    "Description": "",
                    "Name": "DEBUG",
                    "Settable": [
                        "value"
                    ],
                    "Value": "0"
                }
            ],
            "Interface": {
                "Socket": "plugin.sock",
                "Types": [
                    "docker.volumedriver/1.0"
                ]
            },
            "Linux": {
                "Capabilities": null,
                "AllowAllDevices": false,
                "Devices": null
            },
            "Mounts": null,
            "Network": {
                "Type": ""
            },
            "PropagatedMount": "/data",
            "User": {},
            "Workdir": ""
}