Prometheus Server

Configuration

• prometheus.yml: defines which targets at which interval
• Usually you won't go create the prometheus configuration, but use the prometheus CRDs created by the prometheus operator to deploy the configuration
• The prometheus operator is a manager of all prometheus components

global:
  scrape_interval: 15s
  evaluation_interval: 15s # how often to evaluate the rules
rule_files: # aggregating metrics and create alerts
  - "first.rules"
  - "second.rules"
scrape_configs: # what resources prometheus monitors
  - job_name: prometheus # scrape prometheus own metrics
    static_configs:
      - targets: ["localhost:9090"]
  - job_name: node_exporter
    scrape_interval: 1m
    scrape_timeout: 1m
    static_configs:
      - targets: ["localhost:9100"]

Endpoints

• Status page: http://localhost:9090
• Prometheus own metrics: http://localhost:9090/metrics
• Expression browser: http://localhost:9090/graph