How I Connected a Netlify Function to My Home Server Using a Dynamic Cloudflare Tunnel

Описание и применение

Создан постоянный DNS‑запись для Cloudflare Tunnel, запущенный как systemd‑служба, и Netlify Function использует переменную окружения для доступа к домашнему API, устраняя 404‑ошибки при перезапуске туннеля.

Задача

Netlify Functions needed to reach a home‑server API, but Cloudflare Tunnel URLs changed on restart, causing 404s and manual secret updates.

Результат

A permanent DNS hostname for the Cloudflare tunnel, automated service startup, and environment‑variable‑based API calls eliminate manual updates and 404 errors, ensuring reliable communication between Netlify front‑end and home automation stack.

Рабочий процесс

• Create a named Cloudflare tunnel and route a permanent DNS name to it.
• Configure cloudflared with a config.yml pointing to local service and hostname.
• Enable and start cloudflared as a systemd service.
• Store the stable hostname in a Netlify environment variable and fetch it in the function.
• Set up a health‑check Netlify Function that polls Cloudflare metrics and restarts the service via SSH if inactive.

Доказательства

When I moved the front‑end to Netlify, my Netlify Functions needed to hit that internal API. A Cloudflare Tunnel (formerly Argo Tunnel) solved the NAT issue, but every time the tunnel restarted its public URL changed.

Источник

Create a named tunnel (only once) cloudflared tunnel create home‑api

Источник

cloudflared tunnel route dns home‑api home.api.mybiz.com

Источник

/etc/cloudflared/config.yml url: http://localhost:3000 hostname: home.api.mybiz.com

Источник

sudo systemctl enable cloudflared@home‑api sudo systemctl start cloudflared@home‑api

Источник

exports.handler = async () => { const base = process.env.HOME_API_URL || "https://home.api.mybiz.com"; const res = await fetch(${base}/status); const data = await res.json(); return { statusCode: 200, body: JSON.stringify(data) }; };

Источник

curl -s https://api.cloudflare.com/client/v4/accounts/<ACCOUNT_ID>/tunnels | jq '.result[] | select(.name=="home‑api") | .status'

Источник