version: '3.8'

# Deploy with:
#   docker stack deploy -c nats.yml nats
#
# Runs on: pve-tools
# JetStream enabled for persistent messaging.
# Internal only — services connect to nats_nats:4222 via overlay.

services:
  nats:
    image: nats:latest
    command:
      - -js                          # Enable JetStream
      - -sd=/data                    # JetStream storage directory
      - -m=8222                      # Enable monitoring endpoint
    volumes:
      - nats_data:/data
    networks:
      - overlay-net
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.hostname == pve-tools
      restart_policy:
        condition: on-failure
        delay: 5s
        max_attempts: 3

volumes:
  nats_data:

networks:
  overlay-net:
    external: true
    name: ${OVERLAY_NETWORK:-homelab-net}