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Self-hosted Ollama app on Fly.io

A simple repo for deploying Ollama on Fly.io.

Getting started

If you don't already have a Fly.io account, do that first (https://fly.io/app/sign-up), and make sure you have the Fly CLI installed (https://fly.io/docs/flyctl/install/).

First, clone this repository and cd into the repo directory:

$ git clone https://github.com/fly-apps/self-host-ollama
$ cd self-host-ollama

Feel free to change the app name in the fly.toml, and then launch it as a new Fly App with:

$ fly launch --flycast

When it asks if you'd like to copy the configuration, say YES. The fly.toml file in this repo is all the configuration you need to deploy this Ollama app.

The --flycast flag will make your application private. To access your application, you'll use the address http://<your-app>.flycast and ensure you're connected over your Wireguard VPN. This will work in both production and local development. More on this later.

Now that your app is launched, let's download some Ollama models. First, SSH into one of your Fly Machines like so:

$ fly ssh console

Next, set the value of your OLLAMA_HOST, so our ollama commands know what to use:

$ export OLLAMA_HOST=<your-app>.flycast

Finally, pull down the model of your choice:

$ ollama pull llava

And you're done! Your Ollama app is now available for use.

Connecting to your app

This Ollama app will exist separate from whatever app you're building. Since our app is private (we don't randos eating up our Fly GPU usage), we'll need to connect to it over a secure Wireguard connection. When developing locally, the easiest method is to run:

# you don't need -a if you're in the Ollama app directory
$ fly proxy 11434:80 -a <your-app>

This command proxies requests from a local port (11434) to port 80 on your Ollama Fly Machine, over a secure Wireguard tunnel.

When using Ollama in your app locally, you'll set the host to http://localhost:11434. Note that while 11434 is the standard port used by Ollama, since this is just a proxy, that number can really be anything.

In production, you'll use the host http://<your-app>.flycast instead.

Examples

The following code would live in an app separate from your Ollama app; This allows you to auto-start and stop your Ollama app, so you're not paying for GPUs when not in use.

JavaScript (npm ollama package)

import { Ollama } from "ollama";

const ollama = new Ollama({ 
  host: process.env.OLLAMA_APP_URL // either http://localhost:11434 or http://<your-app>.flycast on production
});

const response = await ollama.generate({
  model: 'llama3.1',
  prompt: "Give me a week's worth of healthy vegetarian meal ideas and their recipes.",
  stream: false,
})

JavaScript (basic fetch request)

const params = {
  model: 'llama3.1',
  prompt: "Give me a week's worth of healthy vegetarian meal ideas and their recipes.",
  stream: false,
};

let resp = await fetch("http://sparkling-violet-709.flycast/api/generate", {
  method: "POST",
  body: JSON.stringify(params),
});

Watch the video

Check out the accompanying video here: https://youtu.be/xkWcGmbhZRQ