prometheus.yml

global:
  scrape_interval:     15s # By default, scrape targets every 15 seconds.
  evaluation_interval: 15s # By default, scrape targets every 15 seconds.

# NOTE: use this to validate config file 
# ./promtool check config prometheus.yml

# Alertmanager configuration
alerting:
  alertmanagers:
  - static_configs:
    - targets:
      # - alertmanager:9093

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first_rules.yml"
  # - "second_rules.yml"

# A scrape configuration containing exactly one endpoint to scrape:
scrape_configs:
  - job_name: 'prometheus'
    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.
    static_configs:
    - targets: ['localhost:9090']

  - job_name: 'node_exporter'
    # will give system metrics
    static_configs:
    - targets: ['localhost:9100']

  - job_name: 'golang_app'
    # will give application metrics
    metrics_path: /metrics
    # scrape_interval defines after how much time, targets will be scraped for metrics.
    # scrape_timeout - Prometheus will try for 30s to scrape the metrics, if it can't scrap in this time,
    # it will timeout.

    # scrape_interval: 30s
    # scrape_timeout: 20s
    static_configs:
    - targets: ['localhost:8080']