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zendriver-docker

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Undetectable browser automation in Docker using Python/Zendriver. Full VNC debugging support.

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# Zendriver + Docker ❤️

**Run [Zendriver](https://github.com/stephanlensky/zendriver) in a virtual display from a Docker container! Includes VNC support for easy debugging.**

This repository demonstrates running [Zendriver](https://github.com/stephanlensky/zendriver) in a graphical Wayland session under Docker. This allows for automating a real, GPU-accelerated Chrome browser (not headless) in a Docker container with 0 dependendencies on X11 or Wayland on your host machine.

This deployment method is ideal for running Zendriver on a headless server, as it allows Chrome to run on an entirely virtual display, accessible via VNC, and does not require any existing graphical session on the host.

Based on [`stephanlensky/swayvnc-chrome`](https://github.com/stephanlensky/swayvnc-chrome).

**Linux-only.**

## How to use this repository

This repository is a full project template, ready for production use. To use this template for your own project, just fork or clone it and then proceed to [First-time setup](#first-time-setup).

**Note:** if you want your repository to be private, forking via GitHub will not work, as you cannot change the visibility of forks. Instead, manually create a new repository and then copy the contents there.

## First-time setup

After forking or cloning the repository, you may need to adjust the configuration in order to enable GPU support. Running full GUI apps under Docker is a bit tricky (especially once you add GPUs to the mix), so please bear with me here.

### Prerequisites

- **You are running some variant of Linux on your host machine.** Mac may also work, but I am not able to test. Windows will not work without additional modification.
- Make sure your system has a GPU available (integrated or dedicated) and that you have the latest firmware and drivers installed!

### Instructions

#### AMD/Intel GPU

1. First, identify the DRM rendering node under `/dev/dri` which we will use to give Docker access to our GPU

```
   $ ls /dev/dri
   by-path  card0  card1  renderD128
   ```

Typically, rendering nodes will have names like `renderDXXX`. In this case, `/dev/dri/renderD128` is the rendering node for my GPU.

If you have multiple GPUs installed (ex. an integrated GPU and dedicated GPU), you may see multiple rendering nodes. In this case, a tool like [drm_info](https://gitlab.freedesktop.org/emersion/drm_info) may help you determine which to use.

2. Once you have your desired rendering node, determine the GID of the group which owns it.

```
   $ stat /dev/dri/renderD128 -c "%G %g"
   render 107
   ```

On my Debian system, this file is owned by the `render` group, which has a GID of 107.

3. In [`docker-compose.yml`](https://github.com/stephanlensky/zendriver-docker/blob/main/docker-compose.yml), under `environment`, update `RENDER_GROUP_GID=107` to the GID you found in step 2.

After making this change, you should be able to run the demo app with

```
docker compose up --build app
```

For AMD GPUs, make sure to use the [`docker-compose.amd.yml`](https://github.com/stephanlensky/zendriver-docker/blob/main/docker-compose.amd.yml) overrides file:

```
docker compose -f docker-compose.yml -f docker-compose.amd.yml up --build app
```

#### Nvidia GPU

Sway currently does not officially support the Nvidia proprietary driver. However, some users have had success running the Docker container on Nvidia systems using the [NVIDIA Container Toolkit](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/latest/install-guide.html).

1. Install the [NVIDIA Container Toolkit](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/latest/install-guide.html) and configure it for docker.

2. Run the demo app with

```sh
docker compose -f docker-compose.yml -f docker-compose.nvidia.yml up --build app
```

### Enabling Chrome hardware acceleration

Google Chrome has limited support for some GPU drivers and thus may disable hardware acceleration by default. Connect to VNC, then visit `chrome://gpu/` in the browser to check.

If you find that hardware acceleration is disabled, one of the following steps may help:

1. Ensure you are using the latest version of Google Chrome. You can do this by either:
   1. Building a local `swayvnc-chrome` image, or
   2. Rerun the Chrome install step at the beginning of the docker build process
2. Force enable hardware acceleration by setting the `--ignore-gpu-blocklist` browser arg.
3. Enable XWayland, which may have better support than native Wayland rendering:

1. In you docker-compose file, set the build arg `ENABLE_XWAYLAND`:

```yaml
      build:
        args:
          ENABLE_XWAYLAND: true
      ```

2. Remove the browser arg `--ozone-platform=wayland` or replace it with `--ozone-platform=x11`.

## Usage

This project is packaged with [`uv`](https://github.com/astral-sh/uv), linted with [`ruff`](https://github.com/astral-sh/ruff), and type-checked with [`mypy`](https://mypy-lang.org/).

To get started, [install `uv`](https://docs.astral.sh/uv/getting-started/installation/) and run

```
uv sync
```

to install development dependencies.

The project is fully built with Docker, so this is not technically necessary, but running this command on your host machine will allow for proper IDE integration as you work.

### Running the app

After completing the [First-time setup](#first-time-setup), start the app with [Docker Compose](https://docs.docker.com/compose/).

```
docker compose up --build app
```

This will automatically launch a VNC server which can be used to monitor or debug the running browser instance. To connect to it, use a VNC client (such as [RealVNC](https://www.realvnc.com/en/connect/download/viewer/) for Windows) and connect to `localhost:5910` using the credentials defined in [`docker-compose.yml`](https://github.com/stephanlensky/zendriver-docker/blob/main/docker-compose.yml).

### Linting/formatting

To autoformat:

```
./scripts/format.sh
```

To lint:

```
./scripts/lint.sh
```

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