> ## Documentation Index
> Fetch the complete documentation index at: https://bunny.net/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Python API with FastAPI

> Deploy a Python API with FastAPI to Magic Containers

This guide walks you through building and deploying a Python API using FastAPI to Magic Containers with GitHub Container Registry. You'll need:

* A GitHub account for source code and container registry

> [!TIP]
>
> Don't have a bunny.net account yet? [Sign up](https://dash.bunny.net/auth/register) and enable Magic Containers to get started.

## Create the FastAPI app

Create a new directory with the following files:

```python main.py theme={null}
from fastapi import FastAPI
import os

app = FastAPI()


@app.get("/")
def read_root():
    return {"message": "Hello from Bunny 🐰"}


if __name__ == "__main__":
    import uvicorn

    port = int(os.environ.get("PORT", 80))
    uvicorn.run(app, host="0.0.0.0", port=port)
```

```txt requirements.txt theme={null}
fastapi==0.115.6
uvicorn==0.34.0
```

## Run locally

Install dependencies and start the development server:

```bash theme={null}
pip install -r requirements.txt
uvicorn main:app --reload
```

Test the API:

```bash theme={null}
curl http://localhost:8000/
```

## Create the Dockerfile

```dockerfile Dockerfile theme={null}
FROM python:3.12-slim

WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt
COPY main.py .
EXPOSE 80
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "80"]
```

## Build and push to GitHub Container Registry

> [tab] GitHub Actions
>
> Create `.github/workflows/build.yml` to automatically build and push on every commit to `main`:
>
> ```yaml .github/workflows/build.yml theme={null}
> name: Build and Push
>
> on:
>   push:
>     branches: [main]
>
> env:
>   REGISTRY: ghcr.io
>   IMAGE_NAME: ${{ github.repository }}
>
> jobs:
>   build-and-push:
>     runs-on: ubuntu-latest
>     permissions:
>       contents: read
>       packages: write
>
>     steps:
>       - uses: actions/checkout@v4
>
>       - name: Log in to GitHub Container Registry
>         uses: docker/login-action@v3
>         with:
>           registry: ${{ env.REGISTRY }}
>           username: ${{ github.actor }}
>           password: ${{ secrets.GITHUB_TOKEN }}
>
>       - name: Build and push
>         uses: docker/build-push-action@v5
>         with:
>           context: .
>           push: true
>           tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}
>
>       - name: Update container image on Magic Containers
>         uses: BunnyWay/actions/container-update-image@main
>         with:
>           app_id: ${{ vars.APP_ID }}
>           api_key: ${{ secrets.BUNNYNET_API_KEY }}
>           container: app
>           image_tag: "${{ github.sha }}"
> ```
>
> Push your code to trigger the workflow:
>
> ```bash theme={null}
> git init
> git add .
> git commit -m "Initial commit"
> git remote add origin https://github.com/YOUR_USERNAME/app-fastapi.git
> git push -u origin main
> ```

> [tab] Docker CLI
>
> Build and push manually from your local machine.
>
> **1. Create a Personal Access Token**
>
> Go to [GitHub Settings > Developer settings > Personal access tokens](https://github.com/settings/tokens) and create a token with `write:packages` scope.
>
> **2. Log in to GitHub Container Registry**
>
> ```bash theme={null}
> export CR_PAT=your_personal_access_token
> echo $CR_PAT | docker login ghcr.io -u YOUR_USERNAME --password-stdin
> ```
>
> **3. Build the image**
>
> ```bash theme={null}
> docker build --platform linux/amd64 -t ghcr.io/YOUR_USERNAME/app-fastapi:latest .
> ```
>
> > [!NOTE]
> >
> > Magic Containers only supports images built for the **linux/amd64** architecture. The `--platform` flag ensures compatibility regardless of your local machine's architecture.
>
> **4. Push to registry**
>
> ```bash theme={null}
> docker push ghcr.io/YOUR_USERNAME/app-fastapi:latest
> ```

> [!NOTE]
>
> If your package is private, set the visibility to **Public** in GitHub or
> [configure Magic Containers with registry
> credentials](https://bunny.net/docs/magic-containers/image-registries.md).

## Deploy to Magic Containers

**1. Create a new app**

In the bunny.net dashboard, go to **Magic Containers** and click **Add
App**. Enter a name and select your deployment option.

**2. Add a container**

Click **Add Container**, then configure:

| Field | Value |
| - | - |
| Registry | GitHub Container Registry |
| Image | `YOUR_USERNAME/{imageName}` |
| Tag | `latest` for Docker CLI, or the commit SHA from your GitHub Actions workflow |

**3. Add an endpoint**

Go to the **Endpoints** tab, click **Add New Endpoint**, and set the
container port to `80`.

**4. Deploy**

Click **Add Container**, then **Next Step**, and **Confirm and Create**.

For more details, see the [quickstart guide](https://bunny.net/docs/magic-containers/quickstart.md).

## Test your API

```bash theme={null}
curl https://mc-xxx.bunny.run/
```

```json Response theme={null}
{ "message": "Hello from Bunny 🐰" }
```

> [!NOTE]
>
> You can [add a custom hostname](https://bunny.net/docs/magic-containers/endpoints.md) from the **Endpoints** section in your app settings.

## Connect a database

You can connect your app to [Bunny Database](https://bunny.net/docs/database.md) directly from the dashboard:

1. Go to **Database > \[Your Database] > Access**
2. Click **Generate Tokens**
3. Click **Add Secrets to Magic Container App**
4. Select your app

The `BUNNY_DATABASE_URL` and `BUNNY_DATABASE_AUTH_TOKEN` environment variables are now available in your app:

```python theme={null}
import libsql_experimental as libsql
import os

conn = libsql.connect(
    database=os.environ["BUNNY_DATABASE_URL"],
    auth_token=os.environ["BUNNY_DATABASE_AUTH_TOKEN"]
)

result = conn.execute("SELECT * FROM users").fetchall()
```

See the [Bunny Database documentation](https://bunny.net/docs/database.md) for more details.

## Next steps

1. [Automate deploys with GitHub Actions](https://bunny.net/docs/magic-containers/deploy-with-github-actions.md)
2. [Add a custom hostname](https://bunny.net/docs/magic-containers/endpoints.md)
3. [Add a persistent volume](https://bunny.net/docs/magic-containers/persistent-volumes.md)


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