# speed-data-docker

Debian-based Docker image that runs hourly network speed tests (using speedtest-cli) and serves a simple web UI.

## Docker image

Docker[^1] image on [Docker Hub](https://hub.docker.com/repository/docker/asolkar/speed-data-docker/general)

## What the container provides
- Base: debian
- Installs: speedtest-cli
- Runs: a cron job to execute `run_speed_test.sh` hourly
- Serves: `index.html` and generated JS files on port 8080 via busybox httpd

## Files added/edited
- `Dockerfile` - builds the image
- `start.sh` - entrypoint: starts cron and httpd
- `run_speed_test.sh` - existing script (copied into image)

## Build locally
Make sure Docker is installed locally. From the project root run:

```bash
docker build -t speed-data-app .
```

## Run container

```bash
# Run with a named Docker volume (recommended). The container serves on $PORT inside the container
# (default 8080). Map a host port to the container port with -p <host_port>:<container_port>.
docker volume create speed-data-volume
docker run -d --name speed-data -e PORT=8080 -p 8080:8080 --restart unless-stopped \
	-v speed-data-volume:/var/www/data/speed \
	speed-data-app

# Or run with a host bind mount (for direct access to files on the host):
docker run -d --name speed-data -e PORT=8080 -p 8080:8080 --restart unless-stopped \
	-v /path/on/host/speed-data:/var/www/data/speed \
	speed-data-app
```

## Verify
- Visit http://localhost:8080 to view `index.html` (which reads `speedtest.js` and `speedtest.short.js`).
- Cron runs at minute 0 every hour. Logs go to `/var/log/cron.log` inside the container.

## Notes
- Data files (`speedtest.js`, `speedtest.short.js`, and the raw JSON file) are written to `/var/www/data/speed` inside the container. That path is declared as a Docker VOLUME in the `Dockerfile` so you can mount a named volume or a host directory.
- If you mount a host directory, ensure the directory is writeable by the container process. You can either:
	- run the container as root (not recommended), or
	- chown/chmod the host directory appropriately (e.g., `chown 1000:1000 /path/on/host` or `chmod a+rw /path/on/host`) so the container can write files.

[^1] _Note_: AI agent used to Dockerize existing project