Service logs

Description

Hello, is it possible to get service logs from gitlab-ci-multi-runner? For example, in debug mode, or something else?

For example, I have a job in .gitlab-ci.yml:

elastic:
  services:
    - elasticsearch:5
  script:
    - ./runtests.sh --tag=require_elasticsearch

And sometimes (or even often) this job have failed by Read Timeout in elasticsearch, but I can't determine, what's happened with elasticsearch, because I have no any logs for it.

Proposal

When runner in debug mode save service output too. Or save service output together with job output to gitlab.