Generate REST plugin API docs (#2696)

* Generate rest plugin api docs

* Fix REST Plugin OpenAPI generation

* Add DSTACK_REST_PLUGIN_SERVER_PORT and minor fixes

* Make example_plugin_server an installable package

---------

Co-authored-by: Victor Skvortsov <vds003@gmail.com>

Author: Nadine-H

.github/workflows/docs.yaml

@@ -16,10 +16,11 @@ jobs:
           python-version: 3.11
       - name: Install dstack
         run: |
+          uv pip install examples/plugins/example_plugin_server
           if [ -n "${{ inputs.release_tag }}" ]; then
             uv pip install "dstack[server]==${{ inputs.release_tag }}"
           else
-            uv sync --extra server
+            uv pip install -e '.[server]'
           fi
       - name: Build
         run: |

docs/docs/guides/plugins.md

@@ -116,11 +116,13 @@ class ExamplePolicy(ApplyPolicy):
 ## Built-in Plugins
 
 ### REST Plugin
+
 `rest_plugin` is a builtin `dstack` plugin that allows writing your custom plugins as API servers, so you don't need to install plugins as Python packages.
 
 Plugins implemented as API servers have advantages over plugins implemented as Python packages in some cases:
+
 * No dependency conflicts with `dstack`.
 * You can use any programming language.
 * If you run the `dstack` server via Docker, you don't need to extend the `dstack` server image with plugins or map them via volumes.
 
-To get started, check out the [plugin server example](/examples/plugins/example_plugin_server/README.md).
+To get started, check out the [plugin server example](https://github.com/dstackai/dstack/tree/master/examples/plugins/example_plugin_server). The `rest_plugin` server API is documented [here](../reference/plugins/rest_plugin/index.md).

docs/docs/reference/plugins/rest_plugin/index.md

@@ -0,0 +1,33 @@
+---
+title: REST PLUGIN API
+---
+
+`rest_plugin` is a builtin `dstack` plugin that allows writing custom plugins as API servers. The following is an OpenAPI documentation for a `rest_plugin` API server.
+
+<style>
+    .swagger-ui .info {
+        margin: 0 !important;
+    }
+
+    .swagger-ui .info h1, .swagger-ui .info h2, .swagger-ui .info h3, .swagger-ui .info h4, .swagger-ui .info h5 {
+        font-weight: 800 !important;
+        letter-spacing: -1px !important;
+        color: rgb(0, 0, 0) !important;
+        text-transform: none !important;
+        font-family: var(--md-text-font-family) !important;
+    }
+
+    .swagger-ui .info .title {
+        padding: 0 !important;
+    }
+
+    .swagger-ui .info li, .swagger-ui .info p, .swagger-ui .info table {
+        line-height: 1.3rem !important;
+        font-size: 0.8rem !important;
+        font-family: var(--md-text-font-family) !important;
+    }
+</style>
+
+<br></br>
+
+!!swagger rest_plugin_openapi.json!!

…ns/example_plugin_server/app/__init__.py examples/__init__.pyexamples/plugins/example_plugin_server/app/__init__.py renamed to examples/__init__.py examples/plugins/example_plugin_server/app/__init__.py renamed to examples/__init__.py

@@ -4,27 +4,26 @@ If you wish to hook up your own plugin server through `dstack` builtin `rest_plu
 
 ## Steps
 
-
-1. Install required dependencies for the plugin server:
+1. Install the plugin server:
 
     ```bash
-    uv sync 
+    uv pip install examples/plugins/example_plugin_server
     ```
 
-1. Start the plugin server locally:
+2. Start the plugin server:
 
     ```bash
-    fastapi dev app/main.py 
+    python -m example_plugin_server.main
     ```
 
-1. Enable `rest_plugin` in `server/config.yaml`:
+3. Enable `rest_plugin` in `server/config.yaml`:
 
     ```yaml
    plugins:
     - rest_plugin
     ```
 
-1. Point the `dstack` server to your plugin server:
+4. Point the `dstack` server to your plugin server:
     ```bash
     export DSTACK_PLUGIN_SERVICE_URI=http://127.0.0.1:8000
     ```

examples/plugins/__init__.py

@@ -6,5 +6,12 @@ readme = "README.md"
 requires-python = ">=3.11"
 dependencies = [
     "fastapi[standard]>=0.115.12",
-    "dstack>=0.19.8"
+    "dstack",
 ]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/example_plugin_server"]

examples/plugins/example_plugin_server/README.md

@@ -1,8 +1,9 @@
 import logging
+import os
 
+import uvicorn
 from fastapi import FastAPI
 
-from app.utils import configure_logging
 from dstack.plugins.builtin.rest_plugin import (
     FleetSpecRequest,
     FleetSpecResponse,
@@ -13,6 +14,7 @@
     VolumeSpecRequest,
     VolumeSpecResponse,
 )
+from example_plugin_server.utils import configure_logging
 
 configure_logging()
 logger = logging.getLogger(__name__)
@@ -34,7 +36,7 @@ async def on_fleet_apply(request: FleetSpecRequest) -> FleetSpecResponse:
     logger.info(
         f"Received fleet spec request from user {request.user} and project {request.project}"
     )
-    response = FleetSpecResponse(request.spec, error=None)
+    response = FleetSpecResponse(spec=request.spec, error=None)
     return response
 
 
@@ -43,7 +45,7 @@ async def on_volume_apply(request: VolumeSpecRequest) -> VolumeSpecResponse:
     logger.info(
         f"Received volume spec request from user {request.user} and project {request.project}"
     )
-    response = VolumeSpecResponse(request.spec, error=None)
+    response = VolumeSpecResponse(spec=request.spec, error=None)
     return response
 
 
@@ -52,5 +54,13 @@ async def on_gateway_apply(request: GatewaySpecRequest) -> GatewaySpecResponse:
     logger.info(
         f"Received gateway spec request from user {request.user} and project {request.project}"
     )
-    response = GatewaySpecResponse(request.spec, error=None)
+    response = GatewaySpecResponse(spec=request.spec, error=None)
     return response
+
+
+if __name__ == "__main__":
+    uvicorn.run(
+        app,
+        host="127.0.0.1",
+        port=int(os.getenv("DSTACK_REST_PLUGIN_SERVER_PORT", 8000)),
+    )