How to setup Tailscale exit node on fly.io & koyeb

• Open https://login.tailscale.com/admin/settings/keys to Generate auth key, pick Reusable+Ephemeral

Install and authenticate your flyctl

$ brew install flyctl
$ flyctl auth login

Create a fly.io app from the provided fly.toml file

$ flyctl launch --copy-config

Set the TS_AUTH_KEY env var for the current app.

$ flyctl secrets set TS_AUTH_KEY=tskey-xxxxx

Create a volume to persist tailscale db.

$ fly volumes create ts_data --region fra --size 1

Re-deploy, if you change some settings

$ flyctl deploy

Koyeb deploy, Environment variables tab

add TAILSCALE_AUTHKEY