Prometheus

LogScale exposes a variety of LogScale Metrics that can be used to monitor its performance. If you use Prometheus, setting the PROMETHEUS_METRICS_PORT configuration will open a TCP port for Prometheus to scrape metrics from LogScale:

ini
PROMETHEUS_METRICS_PORT=8081

You can double-check that this is working by curling that port on your installation:

ini
curl $YOUR_LOGSCALE_URL

If it's working properly, you should see a long list of metrics returned.

Configuring Prometheus

You can use a fairly standard Prometheus scraper job for this. A very basic example Prometheus config for this is as follows:

ini
global:
scrape_interval: 1m
scrape_timeout: 10s
evaluation_interval: 1m

scrape_configs:
- job_name: humio
  bearer_token:

  scrape_interval: 30s
  scrape_timeout:  5s

  sample_limit: 1000

  metrics_path: /
  scheme: http

  static_configs:
  - targets: ['10.0.0.10:8081', '10.0.0.11:8081', '10.0.0.12:8081']
    labels:
      service: humio

The metrics need to be scraped from all LogScale nodes in your cluster. Prometheus will need access to whatever port you specify whether through a reverse proxy / load balancer or by directly hitting the LogScale nodes themselves.