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27bd6842f8
Logging plugins use the same HTTP interface as other plugins for basic
command operations meanwhile actual logging operations are handled (on
Unix) via a fifo.
The plugin interface looks like so:
```go
type loggingPlugin interface {
StartLogging(fifoPath string, loggingContext Context) error
StopLogging(fifoPath)
```
This means a plugin must implement `LoggingDriver.StartLogging` and
`LoggingDriver.StopLogging` endpoints and be able to consume the passed
in fifo.
Logs are sent via stream encoder to the fifo encoded with protobuf.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
236 lines
5.9 KiB
Markdown
236 lines
5.9 KiB
Markdown
---
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title: "Plugin config"
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description: "How develop and use a plugin with the managed plugin system"
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keywords: "API, Usage, plugins, documentation, developer"
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---
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<!-- This file is maintained within the docker/docker Github
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repository at https://github.com/docker/docker/. Make all
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pull requests against that repo. If you see this file in
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another repository, consider it read-only there, as it will
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periodically be overwritten by the definitive file. Pull
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requests which include edits to this file in other repositories
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will be rejected.
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-->
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# Plugin Config Version 1 of Plugin V2
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This document outlines the format of the V0 plugin configuration. The plugin
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config described herein was introduced in the Docker daemon in the [v1.12.0
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release](https://github.com/docker/docker/commit/f37117045c5398fd3dca8016ea8ca0cb47e7312b).
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Plugin configs describe the various constituents of a docker plugin. Plugin
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configs can be serialized to JSON format with the following media types:
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Config Type | Media Type
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------------- | -------------
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config | "application/vnd.docker.plugin.v1+json"
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## *Config* Field Descriptions
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Config provides the base accessible fields for working with V0 plugin format
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in the registry.
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- **`description`** *string*
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description of the plugin
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- **`documentation`** *string*
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link to the documentation about the plugin
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- **`interface`** *PluginInterface*
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interface implemented by the plugins, struct consisting of the following fields
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- **`types`** *string array*
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types indicate what interface(s) the plugin currently implements.
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currently supported:
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- **docker.volumedriver/1.0**
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- **docker.networkdriver/1.0**
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- **docker.ipamdriver/1.0**
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- **docker.authz/1.0**
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- **docker.logdriver/1.0**
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- **`socket`** *string*
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socket is the name of the socket the engine should use to communicate with the plugins.
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the socket will be created in `/run/docker/plugins`.
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- **`entrypoint`** *string array*
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entrypoint of the plugin, see [`ENTRYPOINT`](../reference/builder.md#entrypoint)
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- **`workdir`** *string*
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workdir of the plugin, see [`WORKDIR`](../reference/builder.md#workdir)
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- **`network`** *PluginNetwork*
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network of the plugin, struct consisting of the following fields
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- **`type`** *string*
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network type.
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currently supported:
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- **bridge**
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- **host**
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- **none**
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- **`mounts`** *PluginMount array*
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mount of the plugin, struct consisting of the following fields, see [`MOUNTS`](https://github.com/opencontainers/runtime-spec/blob/master/config.md#mounts)
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- **`name`** *string*
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name of the mount.
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- **`description`** *string*
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description of the mount.
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- **`source`** *string*
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source of the mount.
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- **`destination`** *string*
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destination of the mount.
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- **`type`** *string*
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mount type.
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- **`options`** *string array*
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options of the mount.
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- **`ipchost`** *boolean*
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Access to host ipc namespace.
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- **`pidhost`** *boolean*
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Access to host pid namespace.
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- **`propagatedMount`** *string*
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path to be mounted as rshared, so that mounts under that path are visible to docker. This is useful for volume plugins.
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This path will be bind-mounted outisde of the plugin rootfs so it's contents
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are preserved on upgrade.
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- **`env`** *PluginEnv array*
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env of the plugin, struct consisting of the following fields
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- **`name`** *string*
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name of the env.
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- **`description`** *string*
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description of the env.
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- **`value`** *string*
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value of the env.
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- **`args`** *PluginArgs*
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args of the plugin, struct consisting of the following fields
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- **`name`** *string*
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name of the args.
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- **`description`** *string*
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description of the args.
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- **`value`** *string array*
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values of the args.
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- **`linux`** *PluginLinux*
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- **`capabilities`** *string array*
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capabilities of the plugin (*Linux only*), see list [`here`](https://github.com/opencontainers/runc/blob/master/libcontainer/SPEC.md#security)
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- **`allowAllDevices`** *boolean*
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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.
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- **`devices`** *PluginDevice array*
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device of the plugin, (*Linux only*), struct consisting of the following fields, see [`DEVICES`](https://github.com/opencontainers/runtime-spec/blob/master/config-linux.md#devices)
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- **`name`** *string*
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name of the device.
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- **`description`** *string*
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description of the device.
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- **`path`** *string*
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path of the device.
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## Example Config
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*Example showing the 'tiborvass/sample-volume-plugin' plugin config.*
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```json
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{
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"Args": {
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"Description": "",
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"Name": "",
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"Settable": null,
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"Value": null
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},
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"Description": "A sample volume plugin for Docker",
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"Documentation": "https://docs.docker.com/engine/extend/plugins/",
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"Entrypoint": [
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"/usr/bin/sample-volume-plugin",
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"/data"
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],
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"Env": [
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{
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"Description": "",
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"Name": "DEBUG",
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"Settable": [
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"value"
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],
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"Value": "0"
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}
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],
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"Interface": {
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"Socket": "plugin.sock",
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"Types": [
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"docker.volumedriver/1.0"
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]
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},
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"Linux": {
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"Capabilities": null,
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"AllowAllDevices": false,
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"Devices": null
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},
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"Mounts": null,
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"Network": {
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"Type": ""
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},
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"PropagatedMount": "/data",
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"User": {},
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"Workdir": ""
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}
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```
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