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Deploy a Multi-Service Watt Application to Fly.io

In this section, you will deploy a Platformatic Watt application with multiple services to Fly.io. It's important to note that you need to dockerize your Platformatic application before deploying it to Fly.io.

Fly.io Configuration​

Before starting, install the Fly CLI and sign up for an account by following Fly.io’s official guide.

Setting Up Fly.io​

  1. Initialize your Fly.io application: Run the following command from your project root:
  fly launch --no-deploy --generate-name --region lhr --org personal --path .
  1. Fly Configuration (fly.toml): The Fly CLI will generate a fly.toml configuration file for your application.

Ensure your fly.toml has the following settings for database volumes and builds:

[build]
  builder = "heroku/buildpacks:20"

[mounts]
  source = "data"
  destination = "/app/.platformatic/data"
  1. Database Volume: Create a persistent volume for your database storage:
fly volumes create data --size 3 --region lhr
  1. Fly Environment Variables: Ensure your environment variables from your .env file are also present in fly.toml:
[env]
  PORT = 8080
  PLT_SERVER_HOSTNAME = "0.0.0.0"
  PLT_SERVER_LOGGER_LEVEL = "info"
  DATABASE_URL = "sqlite:///app/.platformatic/data/db.sqlite"

It's important to note that your env PORT must match the PORT in your fly.toml file. Navigate to your watt.json file and update the hostname and port to match the following:

"server": {
    "hostname": "0.0.0.0",
    "port": "{PORT}"
  },

Deploying to Fly.io​

Now that the configuration is complete, deploy your Platformatic application to Fly.io:

fly deploy

Check out the demo application with multiple services deployed on Fly.io here.