Prometheus demo

docker-compose.yml

version: "3.9"

services:
  prometheus:
    image: prom/prometheus
    command:
      - "--web.enable-lifecycle"
    ports:
      - 9090:9090
    volumes:
      - ${PWD}/prometheus.yml:/prometheus/prometheus.yml

  grafana:
    image: grafana/grafana
    ports:
      - 3000:3000

  cockroach:
    image: cockroachdb/cockroach
    command: start-single-node --insecure
    ports:
      - "26257:26257"
      - "8081:8080"

  node_exporter:
    image: quay.io/prometheus/node-exporter
    ports:
      - 9100:9100

prometheus.yml

# my global config
global:
  scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).

# 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:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: "prometheus"

    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.

    static_configs:
      - targets: ["localhost:9090"]

  - job_name: "cockroach"
    metrics_path: /_status/vars
    static_configs:
      - targets: ["cockroach:8080"]


  - job_name: "grafana"
    static_configs:
      - targets: ["grafana:3000"]

  - job_name: "node_exporter"
    static_configs:
      - targets: ["node_exporter:9100"]