fly-deployment

To deploy a monorepo to Fly.io, place fly.toml files at the project root for each app and run fly deploy with the --config flag for each specific file, such as fly.api.toml and fly.web.toml, ensuring Dockerfiles exist at the correct per-app paths.

Next.js Fly.io deployment failures often stem from incorrect Dockerfile paths in fly.toml or missing build context. Ensure your per-app configuration references the correct Dockerfile location and that multi-stage builds are properly structured.

To work around the Fly.io one-volume-per-machine limitation, design your deployment to use a single volume with subdirectories instead of attempting to mount multiple volumes on a single machine.

Before configuring Dockerfile deployments on Fly.io, you need the Fly CLI installed and Docker running locally. You must also create fly.toml configurations at your project root that reference the correct Dockerfile paths.

Common Fly.io deployment issues include Dockerfile path mistakes, Next.js build context errors, and TLS proxy considerations. Troubleshooting involves verifying per-app fly.toml configurations and ensuring Dockerfile paths are accurately specified.

Yes, you can use separate Dockerfiles for Python and Next.js apps in a Fly.io monorepo. Configure per-app fly.toml files at the project root that reference the specific Dockerfile paths for each application, such as apps/api/Dockerfile and apps/web/Dockerfile.