Scenario: A developer wants to extend the functionality of the Genai-Stack by using plugins to add new features or modify existing ones. In this example, we will create a custom plugin for the Genai-Stack using Docker’s plugin API.
First, let’s understand the Genai-Stack and its components. The Genai-Stack is a simplified AI/ML integration solution provided by Docker. It includes various components such as front-end, api, bot, and loader. The front-end is built using Svelte, and the back-end is written in Python. The Dockerfiles and configuration files in the project directory are used to build and run these components.
To create a custom plugin for the Genai-Stack, follow these steps:
- Prepare the plugin’s root filesystem and configuration:
Create a new directory for your plugin and add the required files:
mkdir myplugin
cd myplugin
touch config.json
touch Dockerfile
- Configure the plugin’s Dockerfile:
Add the following content to the Dockerfile:
FROM python:3.9
WORKDIR /app
COPY . /app
RUN pip install --no-cache-dir -r requirements.txt
CMD ["python", "main.py"]
Replace “main.py” with the name of your Python script.
- Create the plugin configuration file (config.json):
Add the following content to the config.json file:
{
"name": "myplugin",
"description": "A custom plugin for the Genai-Stack",
"version": "0.1.0",
"author": "Your Name",
"license": "MIT"
}
Replace “Your Name” with your name.
- Build the plugin:
Build the plugin using the following command:
docker build -t myplugin .
- Register the plugin with Docker:
To register the plugin with Docker, use the following command:
docker plugin load myplugin.tar
Replace “myplugin.tar” with the name of the plugin tarball.
- Test the plugin:
To test the plugin, create a new Dockerfile in the project directory and add the following content:
FROM python:3.9
RUN docker plugin install myplugin
RUN docker plugin create myplugin-data /tmp/myplugin-data
RUN docker plugin inspect myplugin > myplugin.json
CMD ["python", "test.py"]
Replace “test.py” with the name of your test script.
Build and run the Dockerfile to test the plugin:
docker build -t mytest .
docker run mytest
- Use the plugin in the Genai-Stack:
To use the plugin in the Genai-Stack, you need to modify the Dockerfile or docker-compose.yml file to include the plugin. For more information, refer to the Docker documentation on plugins: https://docs.docker.com/engine/extend/plugin_api/
Tests:
To verify the plugin’s functionality, you can write tests and run them using the test script. The tests should cover various scenarios and edge cases to ensure the plugin works as expected.
Additionally, you can test the plugin integration with the Genai-Stack by modifying the Dockerfile or docker-compose.yml file and running the Genai-Stack with the plugin.
For more information on testing Docker plugins, refer to the following resources:
- https://docs.docker.com/engine/extend/plugin_api/testing/
- https://docs.docker.com/engine/extend/plugin_api/develop/#testing-your-plugin
By following these steps, you will have created a custom plugin for the Genai-Stack and integrated it into the project. This example demonstrates how to create a simple plugin, but you can extend it to add more complex functionality as needed.
