Generate Cloudflare config tunnel and run it

README.md

This is a simple script that will generate a config for cloudflared (with the spec you provide) and run it.

Usage

Generate a single tunnel that redirects mydomain.work to localhost:8080:

cftunnel :8080

This command will generate two tunnels:

• mydomain.work -> localhost:8080
• api.mydomain.work -> localhost:3000

cftunnel :8080 api:3000

Requirements

• NuShell
• cloudflared

The script assumes that you created the basic set up of the Cloudflare Tunnel and created self-hosted tunnel named "mytunnel".

cftunnel.nu

#!/usr/bin/env nu

def parse-arg [
  domain: string
  item: string
] {
  let split = ($item | split row ":")
  let subdomain = ($split | get 0)
  let port = ($split | get 1)
  let hostname = ($"($subdomain).($domain)" | str trim -l -c '.')

  let service = $"http://localhost:($port)"

  { hostname: $hostname, service: $service }
}

def main [
  --domain='mydomain.work' # The domain that should be used
  ...args: string # List of forwarded hosts
] {
  let ingress = ($args | each { |item| (parse-arg $domain $item) })
  let ingress = ($ingress | append { service: "http_status:404" })

  let config = ({
    tunnel: "mytunnel",
    ingress: $ingress
  } | to yaml)

  return $config

  $config | save --force ~/.cloudflared/config.yml

  cloudflared --protocol http2 tunnel run mytunnel
}