docker-compose/43-compose-logging-stack/docker-compose.yml

services:
  loki:
    image: grafana/loki:latest
    ports: ["3100:3100"]
  grafana:
    image: grafana/grafana
    ports: ["3000:3000"]
  promtail:
    image: grafana/promtail:latest
    volumes:
      - /var/log:/var/log:ro