# Per-Docker-host monitoring sidecar. Deploy this compose on every Docker host you
# want visible in the observability stack. It exposes host + container metrics for the
# cluster's vmagent to PULL over the LAN, and pushes container logs to VictoriaLogs.
#
#   cp .env.example .env   # set HOST_LABEL + VLOGS_ENDPOINT
#   docker compose up -d
#
# Then add this host's IP to ../metrics/scrapes/docker-hosts.yaml (VMStaticScrape).
services:
  # Host metrics (CPU/mem/disk/net/fs). host networking -> listens on <hostIP>:9100.
  node-exporter:
    image: quay.io/prometheus/node-exporter:v1.9.1
    command:
      - --path.rootfs=/host
    network_mode: host
    pid: host
    volumes:
      - /:/host:ro,rslave
    restart: unless-stopped

  # Container metrics. Published on <hostIP>:8080. If 8080 is taken on this host,
  # remap the left side (e.g. "8098:8080") and update the VMStaticScrape target.
  cadvisor:
    image: gcr.io/cadvisor/cadvisor:v0.49.1
    command:
      - --housekeeping_interval=30s
      - --docker_only=true
    ports:
      - "8080:8080"
    volumes:
      - /:/rootfs:ro
      - /var/run:/var/run:ro
      - /sys:/sys:ro
      - /var/lib/docker/:/var/lib/docker:ro
      - /dev/disk/:/dev/disk:ro
    devices:
      - /dev/kmsg
    privileged: true
    restart: unless-stopped

  # Ships every container's logs to VictoriaLogs (pushed over the tailnet).
  vector:
    image: timberio/vector:0.44.0-debian
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ./vector.yaml:/etc/vector/vector.yaml:ro
    environment:
      VLOGS_ENDPOINT: ${VLOGS_ENDPOINT}
      HOST_LABEL: ${HOST_LABEL}
    restart: unless-stopped