Gitlab runner docker Could not resolve host

Question

Im using 2 containers on my Ubuntu OS: Gitlab-ce and gitlab-runner

Containers names are: gitlab_gitlab_1 and gitlab_gitlab-runner_1

I

Answer 1

Thanks to Tarun Lalwan link and according to Joyce Babu post, there are an undocumented option from the gitlab runner repos in the [runners.docker] section

network_mode : Add container to a custom network

So I have to set this option with my network name in the config.toml like

[[runners]]
  ...
  [runners.docker]
    ...
    network_mode = "gitlab_default"

OR when create the runner from command line

docker exec -it gitlab_gitlab-runner_1 gitlab-runner register \
--non-interactive \
--url http://gitlab_gitlab_1 \
--registration-token _wgMgEx3nBocYQtoi83c \
--executor docker \
--docker-image alpine:latest \
--docker-network-mode gitlab_default