Hetzner Load Balancer Prometheus Exporter

Exports metrics from Hetzner Load Balancer for consumption by Prometheus

Preparing

API TOKEN

Go to Hetzner Console. Open project where you have running Load Balancer and create API TOKEN in Security section

Load Balancer ID

Next we sholud get ID of our Load Balancer. This information we will get from Hetzner API, everything about API you find in official API documentation

Example curl

curl \
    -H "Authorization: Bearer $API_TOKEN" \
	'https://api.hetzner.cloud/v1/load_balancers'

Response sample

{
  "load_balancers": [
    {
      "id": 4711,
      "name": "Web Frontend",
      "public_net": {
        "enabled": false,
        "ipv4": {
          "ip": "1.2.3.4"
        },
...
    }
}

Configuring

In deploy/kubernetes.yaml add in env section id which we got from API and API TOKEN

env:
  - name: LOAD_BALANCER_IDS
    value: "11,22,33,44"
  - name: ACCESS_TOKEN
    value: "ewsfds43r*****132"
  ## Optional
  - name: SCRAPE_INTERVAL
    value: '60'

Enviroment	Description
LOAD_BALANCER_IDS	Supported string with specific id 11,22,33 or all for scraping metrics from all load balancers in the project
ACCESS_TOKEN	Hetzner API token
Optional SCRAPE_INTERVAL	value in seconds, default value is 30 seconds

Deploy it to Kubernetes cluster

kubectl apply -f deploy/kubernetes.yaml

Check metrics page

kubectl port-forward <pod> 8000:8000

Open in your browser localhost:8000:

Grafana

Grafana Dashboard you can find here

Metrics in Hetzner console

Metrics in Grafana