docker-compose/pkg/e2e/fixtures/ipam/compose.yaml

services:
  foo:
    image: alpine
    entrypoint: ["sleep", "600"]
    networks:
      default:
        ipv4_address: 10.1.0.100  # <-- Fixed IP address
networks:
  default:
    ipam:
      config:
        - subnet: 10.1.0.0/16