version: "2"

services:

  server:
    image: ${TEST_TAG:-sut:latest}
    networks:
      - internal
    command: -v -v -v

  version:
    image: ${TEST_TAG:-sut:latest}
    networks:
      - internal
    command: -V

  sut:
    image: alpine:3.16
    networks:
      - internal
    depends_on:
      - server
    entrypoint: ""
    command: >-
      sh -c '
      apk add --no-cache bind-tools &&
      dig sigok.verteiltesysteme.net @server +dnssec | tee /dev/stderr | grep -wq NOERROR &&
      dig sigfail.verteiltesysteme.net @server +dnssec | tee /dev/stderr | grep -wq SERVFAIL
      '