WIP: Host ip fix

[gel-bcegielka]

No description provided.

[gel-bcegielka]

Apologies, I was meant to create PR in my fork, but didn't change the base. This can be closed as it was a dirty hack to get testcontainers in gitlab dind setup.
It such case
https://github.com/testcontainers/testcontainers-python/blob/master/testcontainers/core/container.py#L79
function get_container_host_ip returns container’s bridge ip 178.18.0.1
Connection url: postgresql+psycopg2://test:[email protected]:32768/test
which does not work.

What we need it docker service ip we started with .gitlab-ci.yml:

  services:
    - docker:19.03.13-dind
  variables:
    DOCKER_HOST: tcp://docker:2376
    DOCKER_TLS_CERTDIR: "/certs"
    DOCKER_TLS_VERIFY: 1
    DOCKER_CERT_PATH: "$DOCKER_TLS_CERTDIR/client"

which is

$ ping -c 1 docker
PING docker (172.17.0.2): 56 data bytes