Merge pull request #5172 from thaJeztah/deprecate_graphdriver_plugins
Deprecate experimental graphdriver plugins
This commit is contained in:
Sebastiaan van Stijn
GitHub
Коммит
64206aef76
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@ -52,6 +52,7 @@ The table below provides an overview of the current status of deprecated feature
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|------------|------------------------------------------------------------------------------------------------------------------------------------|------------|--------|
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| Deprecated | [Non-standard fields in image inspect](#non-standard-fields-in-image-inspect) | v27.0 | v28.0 |
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| Deprecated | [API CORS headers](#api-cors-headers) | v27.0 | v28.0 |
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| Deprecated | [Graphdriver plugins (experimental)](#graphdriver-plugins-experimental) | v27.0 | v28.0 |
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| Deprecated | [Unauthenticated TCP connections](#unauthenticated-tcp-connections) | v26.0 | v28.0 |
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| Deprecated | [`Container` and `ContainerConfig` fields in Image inspect](#container-and-containerconfig-fields-in-image-inspect) | v25.0 | v26.0 |
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| Deprecated | [Deprecate legacy API versions](#deprecate-legacy-api-versions) | v25.0 | v26.0 |
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@ -148,6 +149,21 @@ part of the underlying image's Config, and deprecated:
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[Docker image spec]: https://github.com/moby/docker-image-spec/blob/v1.3.1/specs-go/v1/image.go#L19-L32
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[OCI Image Spec]: https://github.com/opencontainers/image-spec/blob/v1.1.0/specs-go/v1/config.go#L24-L62
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### Graphdriver plugins (experimental)
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**Deprecated in Release: v27.0**
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**Target For Removal In Release: v28.0**
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[Graphdriver plugins](https://github.com/docker/cli/blob/v26.1.4/docs/extend/plugins_graphdriver.md)
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are an experimental feature that allow extending the Docker Engine with custom
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storage drivers for storing images and containers. This feature was not
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maintained since its inception, and will no longer be supported in upcoming
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releases.
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Users of this feature are recommended to instead configure the Docker Engine
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to use the [containerd image store](https://docs.docker.com/storage/containerd/),
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and a custom [snapshotter](https://github.com/containerd/containerd/tree/v1.7.18/docs/snapshotters)
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### API CORS headers
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**Deprecated in Release: v27.0**
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@ -2,6 +2,8 @@
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title: Docker Engine managed plugin system
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description: Develop and use a plugin with the managed plugin system
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keywords: "API, Usage, plugins, documentation, developer"
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aliases:
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- "/engine/extend/plugins_graphdriver/"
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---
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- [Installing and using a plugin](index.md#installing-and-using-a-plugin)
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@ -1,401 +0,0 @@
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---
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description: "How to manage image and container filesystems with external plugins"
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keywords: "Examples, Usage, storage, image, docker, data, graph, plugin, api"
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advisory: experimental
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---
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<!-- This file is maintained within the docker/cli GitHub
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repository at https://github.com/docker/cli/. 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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# Graphdriver plugins
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## Changelog
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### 1.13.0
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- Support v2 plugins
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# Docker graph driver plugins
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Docker graph driver plugins enable admins to use an external/out-of-process
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graph driver for use with Docker engine. This is an alternative to using the
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built-in storage drivers, such as overlay2.
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You need to install and enable the plugin and then restart the Docker daemon
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before using the plugin. See the following example for the correct ordering
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of steps.
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```console
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$ docker plugin install cpuguy83/docker-overlay2-graphdriver-plugin # this command also enables the driver
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<output suppressed>
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$ pkill dockerd
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$ dockerd --experimental -s cpuguy83/docker-overlay2-graphdriver-plugin
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```
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# Write a graph driver plugin
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See the [plugin documentation](https://docs.docker.com/engine/extend/) for detailed information
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on the underlying plugin protocol.
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## Graph Driver plugin protocol
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If a plugin registers itself as a `GraphDriver` when activated, then it is
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expected to provide the rootfs for containers as well as image layer storage.
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### /GraphDriver.Init
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**Request**:
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```json
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{
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"Home": "/graph/home/path",
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"Opts": [],
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"UIDMaps": [],
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"GIDMaps": []
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}
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```
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Initialize the graph driver plugin with a home directory and array of options.
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These are passed through from the user, but the plugin is not required to parse
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or honor them.
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The request also includes a list of UID and GID mappings, structed as follows:
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```json
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{
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"ContainerID": 0,
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"HostID": 0,
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"Size": 0
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}
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```
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**Response**:
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```json
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{
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"Err": ""
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}
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```
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Respond with a non-empty string error if an error occurred.
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### /GraphDriver.Capabilities
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**Request**:
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```json
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{}
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```
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Get behavioral characteristics of the graph driver. If a plugin does not handle
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this request, the engine will use default values for all capabilities.
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**Response**:
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```json
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{
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"ReproducesExactDiffs": false,
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}
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```
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Respond with values of capabilities:
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* **ReproducesExactDiffs** Defaults to false. Flags that this driver is capable
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of reproducing exactly equivalent diffs for read-only filesystem layers.
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### /GraphDriver.Create
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**Request**:
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```json
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{
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"ID": "46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187",
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"Parent": "2cd9c322cb78a55e8212aa3ea8425a4180236d7106938ec921d0935a4b8ca142",
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"MountLabel": "",
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"StorageOpt": {}
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}
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```
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Create a new, empty, read-only filesystem layer with the specified
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`ID`, `Parent` and `MountLabel`. If `Parent` is an empty string, there is no
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parent layer. `StorageOpt` is map of strings which indicate storage options.
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**Response**:
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```json
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{
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"Err": ""
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}
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```
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Respond with a non-empty string error if an error occurred.
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### /GraphDriver.CreateReadWrite
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**Request**:
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```json
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{
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"ID": "46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187",
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"Parent": "2cd9c322cb78a55e8212aa3ea8425a4180236d7106938ec921d0935a4b8ca142",
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"MountLabel": "",
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"StorageOpt": {}
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}
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```
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Similar to `/GraphDriver.Create` but creates a read-write filesystem layer.
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### /GraphDriver.Remove
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**Request**:
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```json
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{
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"ID": "46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187"
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}
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```
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Remove the filesystem layer with this given `ID`.
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**Response**:
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```json
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{
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"Err": ""
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}
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```
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Respond with a non-empty string error if an error occurred.
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### /GraphDriver.Get
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**Request**:
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```json
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{
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"ID": "46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187",
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"MountLabel": ""
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}
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```
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Get the mountpoint for the layered filesystem referred to by the given `ID`.
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**Response**:
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```json
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{
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"Dir": "/var/mygraph/46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187",
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"Err": ""
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}
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```
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Respond with the absolute path to the mounted layered filesystem.
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Respond with a non-empty string error if an error occurred.
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### /GraphDriver.Put
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**Request**:
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```json
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{
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"ID": "46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187"
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}
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```
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Release the system resources for the specified `ID`, such as unmounting the
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filesystem layer.
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**Response**:
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```json
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{
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"Err": ""
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}
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```
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Respond with a non-empty string error if an error occurred.
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### /GraphDriver.Exists
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**Request**:
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```json
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{
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"ID": "46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187"
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}
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```
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Determine if a filesystem layer with the specified `ID` exists.
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**Response**:
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```json
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{
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"Exists": true
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}
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```
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Respond with a boolean for whether or not the filesystem layer with the specified
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`ID` exists.
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### /GraphDriver.Status
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**Request**:
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```json
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{}
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```
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Get low-level diagnostic information about the graph driver.
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**Response**:
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```json
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{
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"Status": [[]]
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}
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```
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Respond with a 2-D array with key/value pairs for the underlying status
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information.
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### /GraphDriver.GetMetadata
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**Request**:
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```json
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{
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"ID": "46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187"
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}
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```
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Get low-level diagnostic information about the layered filesystem with the
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with the specified `ID`
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**Response**:
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```json
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{
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"Metadata": {},
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"Err": ""
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}
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```
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Respond with a set of key/value pairs containing the low-level diagnostic
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information about the layered filesystem.
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Respond with a non-empty string error if an error occurred.
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### /GraphDriver.Cleanup
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**Request**:
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```json
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{}
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```
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Perform necessary tasks to release resources help by the plugin, such as
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unmounting all the layered file systems.
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**Response**:
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```json
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{
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"Err": ""
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}
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```
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Respond with a non-empty string error if an error occurred.
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### /GraphDriver.Diff
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**Request**:
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```json
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{
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"ID": "46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187",
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"Parent": "2cd9c322cb78a55e8212aa3ea8425a4180236d7106938ec921d0935a4b8ca142"
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}
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```
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Get an archive of the changes between the filesystem layers specified by the `ID`
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and `Parent`. `Parent` may be an empty string, in which case there is no parent.
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**Response**:
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```
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{{ TAR STREAM }}
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```
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### /GraphDriver.Changes
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**Request**:
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```json
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{
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"ID": "46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187",
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"Parent": "2cd9c322cb78a55e8212aa3ea8425a4180236d7106938ec921d0935a4b8ca142"
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}
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```
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Get a list of changes between the filesystem layers specified by the `ID` and
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`Parent`. If `Parent` is an empty string, there is no parent.
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**Response**:
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```json
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{
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"Changes": [{}],
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"Err": ""
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}
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```
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Respond with a list of changes. The structure of a change is:
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```json
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"Path": "/some/path",
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"Kind": 0,
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```
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Where the `Path` is the filesystem path within the layered filesystem that is
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changed and `Kind` is an integer specifying the type of change that occurred:
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- 0 - Modified
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- 1 - Added
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- 2 - Deleted
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Respond with a non-empty string error if an error occurred.
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### /GraphDriver.ApplyDiff
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**Request**:
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```
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{{ TAR STREAM }}
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```
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Extract the changeset from the given diff into the layer with the specified `ID`
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and `Parent`
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**Query Parameters**:
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- id (required)- the `ID` of the new filesystem layer to extract the diff to
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- parent (required)- the `Parent` of the given `ID`
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**Response**:
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```json
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{
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"Size": 512366,
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"Err": ""
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}
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```
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Respond with the size of the new layer in bytes.
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Respond with a non-empty string error if an error occurred.
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### /GraphDriver.DiffSize
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**Request**:
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```json
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{
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"ID": "46fe8644f2572fd1e505364f7581e0c9dbc7f14640bd1fb6ce97714fb6fc5187",
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"Parent": "2cd9c322cb78a55e8212aa3ea8425a4180236d7106938ec921d0935a4b8ca142"
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}
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```
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Calculate the changes between the specified `ID`
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**Response**:
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```json
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{
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"Size": 512366,
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"Err": ""
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}
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```
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Respond with the size changes between the specified `ID` and `Parent`
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Respond with a non-empty string error if an error occurred.
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@ -36,6 +36,5 @@ Option to squash image layers to the base image after successful builds.
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Checkpoint and restore support for Containers.
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Metrics (Prometheus) output for basic container, image, and daemon operations.
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* [External graphdriver plugins](../docs/extend/plugins_graphdriver.md)
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* [Checkpoint & Restore](../docs/reference/commandline/checkpoint.md)
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* [Docker build with --squash argument](../docs/reference/commandline/build.md#squash-an-images-layers---squash-experimental)
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