GreenCloudVPS $4.50 Ampere monitoring stack

Finally got my monitoring dialed in on a cheap GreenCloudVPS Ampere instance! This stack runs circles around paid alternatives. Insane value!!

Hardware: 1core Ampere Altra / 2GB RAM / GreenCloudVPS $4.50

services:
  uptime-kuma:
    image: louislam/uptime-kuma:1
    volumes:
      - ./kuma-data:/app/data
    ports:
      - "3001:3001"

  prometheus:
    image: prom/prometheus
    volumes:
      - ./prometheus.yml:/etc/prometheus/prometheus.yml
      - prom-data:/prometheus

  alertmanager:
    image: prom/alertmanager
    volumes:
      - ./alertmanager.yml:/etc/alertmanager/alertmanager.yml

Uptime Kuma for pretty status pages, Prometheus for metrics, Alertmanager for... alerts! All on one tiny ARM box. Using ~1.1GB RAM at steady state.

I route alerts to a Telegram bot. 15ms response time from my home connection to GreenCloudVPS's Singapore edge.

Who else running bare-metal monitoring on budget ARM??

In my country, electricity not stable. Self-hosted monitoring must work when power out in my house.

Can this stack send alert to SMS gateway? I have look at alertmanager config, not clear. In my country, email not reliable for urgent alert.

Also: how you handle disk fill-up? Prometheus grow very fast in my last try.

Do I need docker experience for this? I only used apt install before...

Also is there cheaper option than GreenCloudVPS for learning? I'm on student budget, $4.50 is lot for me.

Thank you everyone for helping!