ro

ro
:ro

Datadog agent:

version: '3'
services:
  redis:
    image: redis
  datadog:
    build: datadog
    pid: host
    environment:
     - DD_API_KEY=${DD_API_KEY}
     - DD_SITE=datadoghq.com
    volumes:
     - /var/run/docker.sock:/var/run/docker.sock
     - /proc/:/host/proc/:ro
     - /sys/fs/cgroup:/host/sys/fs/cgroup:ro

docker-compose.yml: services:, volumes:, configs:, secrets:, networks:, driver:, depends_on:, extends: