Bun function

Introduction

Railway recently introduced functions support based on bun. It allows you to quickly wip up a simple API.

You can achieve the same thing in ZaneOps too leveraging our Config files feature.

Live demo

You can find a production version of this application at: https://bun-function.fkiss.me

Prerequisites

• A working ZaneOps instance. If you need help with installation, refer to our ZaneOps setup guide.

Process

1. Create a Docker service using oven/bun image:

2. Go to the service settings page and add a new config file with the the mount path of /app/index.ts containing your code:

   /app/index.ts

   // index.tsx (Bun v1.2 runtime)
   import { Hono } from "hono@4";
   import { cors } from 'hono/cors';
   
   const app = new Hono();
   
   app.use("/*", cors());
   app.get("/", (c) => c.text("Hello world!"));
   app.get("/api/health", (c) => c.json({ status: "ok" }));
   
   Bun.serve({
       port: import.meta.env.PORT ?? 3000,
       fetch: app.fetch,
   });

3. Update the start command to run the script on startip:

   bun run /app/index.ts

   

4. Add a URL to the service Forwarded to the port 3000:

5. Deploy the service: