Quick Guide to OhaProxy, Docker Compose, and GitHub

When you’re trying to spin up a reliable reverse‑proxy stack without drowning in boilerplate, the trio of OhaProxy, Docker Compose, and GitHub can be surprisingly handy. In this quick guide we’ll walk through what each piece does, how they fit together, and a few practical steps to get a basic deployment running in minutes.

Understanding the three components

OhaProxy is an open‑source reverse‑proxy server that emphasizes lightweight configuration and high throughput. While it isn’t as battle‑tested as HAProxy, early users praise its simple YAML‑based rules and built‑in health‑checks.

Docker Compose is the orchestration tool that lets you define multi‑container applications in a single docker‑compose.yml file. It handles networking, volume mounting, and service ordering so you can launch an entire stack with one command.

GitHub serves as the source of truth for your configuration files. By storing the docker‑compose.yml and OhaProxy’s rule set in a repository, you get version control, easy collaboration, and the option to trigger automated builds.

Preparing your OhaProxy configuration

OhaProxy expects a YAML file that maps incoming hostnames to backend services. A minimal example might look like this:

• version: 2
• http:
•   - name: example.com
•     target: http://web:8080

Save the snippet as oproxy.yml in a folder called config. You can add more routes later; OhaProxy will reload the file on change if you enable the optional watch flag.

Defining the Docker Compose file

Next, create docker‑compose.yml at the root of your project. The file should pull the official OhaProxy image (or a community‑built variant) and a simple web service to act as a backend:

version: "3.8"
services:
ohaproxy:
image: ghcr.io/yourorg/ohaproxy:latest
ports:
- "80:80"
volumes:
- ./config/oproxy.yml:/etc/ohaproxy/oproxy.yml:ro
command: ["--config", "/etc/ohaproxy/oproxy.yml", "--watch"]
web:
image: nginx:alpine
ports:
- "8080:80"

Notice the volumes line – it mounts the configuration file read‑only into the container, keeping the host’s version in sync with what OhaProxy serves.

Putting the files on GitHub

Initialize a new repository, add the two files, and push:

• git init
• git add docker‑compose.yml config/oproxy.yml
• git commit -m "Initial OhaProxy stack"
• git remote add origin https://github.com/yourname/ohaproxy‑demo.git
• git push -u origin master

With the repo public (or private, if you prefer), anyone with Docker installed can clone it and run docker compose up -d to launch the full stack. For teams, you might enable GitHub Actions to automatically rebuild the image when oproxy.yml changes, ensuring the live environment always reflects the repository.

Running the stack locally

On a development machine, a single command gets everything going:

docker compose up -d

Docker pulls the OhaProxy and Nginx images, creates a network, and starts both containers. You can then point your browser to http://localhost; OhaProxy will forward the request to the Nginx container on port 8080, serving the default welcome page.

Deploying to a remote host

If you have a cloud VM with Docker installed, clone the repo there and repeat the docker compose up -d step. Because OhaProxy binds to port 80, you’ll typically need root privileges or to expose the port via a firewall rule. A quick sudo wrapper solves most permission issues:

sudo docker compose up -d

For production, consider adding a TLS termination layer—either let OhaProxy handle https directly with a certificate mounted as a secret, or place a dedicated tool like Caddy in front of it.

Common pitfalls and how to avoid them

• Port conflicts. If another service already listens on port 80, Docker will refuse to start the OhaProxy container. Either stop the conflicting service or map OhaProxy to an alternate host port (e.g., "8081:80").
• Configuration cache. Some older OhaProxy builds ignore the --watch flag. In that case, you’ll need to restart the container after editing oproxy.yml.
• Git history bloat. Binary images stored in the repo quickly inflate its size. Keep only source files (Dockerfiles, YAML configs) in Git; push built images to a container registry instead.

Extending the setup

Once the basics work, you can add more services—databases, caches, or micro‑services—by simply expanding the docker‑compose.yml file and adding matching routes to oproxy.yml. Because OhaProxy reads the same YAML format for both routing and health checks, you often end up with a single source of truth for your network topology.

FAQ

Can I use OhaProxy with Kubernetes?

Yes, OhaProxy can run as a sidecar or as a dedicated ingress controller, but you’ll need to translate the YAML rules into a ConfigMap and mount it into the pod. Docker Compose is a quicker entry point for local development.

Do I have to host my own Docker registry?

No. For small teams the GitHub Container Registry (GHCR) works fine; you push the OhaProxy image there and reference it in docker‑compose.yml with ghcr.io/yourorg/ohaproxy:tag.

Is TLS termination handled by OhaProxy?

Recent versions support TLS natively, but many users prefer a dedicated TLS terminator (Caddy, Traefik, or Nginx) to simplify certificate renewal via Let’s Encrypt.

What’s the difference between OhaProxy and HAProxy?

HAProxy is a mature, feature‑rich solution with decades of production use. OhaProxy trades some advanced load‑balancing algorithms for a leaner codebase and easier YAML configuration, making it attractive for small‑to‑medium projects.