use env variable to prefill the register question

When running multi-runner on docker, in order to get the CA files right I needed to redo the procedure quite a lot of times (I'm not a very clever man)

what was really frustrating was to have to answer again and again these 3 questions

Please enter the gitlab-ci token for this runner:
Please enter the gitlab-ci description for this runner:
Please enter the gitlab-ci tags for this runner (comma separated):

Especially as under the hood the code rely on codegansta/cli it should not be very hard to bind these questions to env variables like GITLAB_CI_TOKEN GITLAB_CI_DESCRIPTION GITLAB_CI_TAGS , so that one does not have to enter them again and again

(if it's already possible, I was not able to find it easily in the documentation)

CA?

Please check: gitlab-runner register --help

the certificate authority files (ca.crt), but yes thanks I didn't thought about running --help as I wasn't expecting the environment variables mapping to be there. A line in the readme explaining it is possible (and to avoid needing to keep the list up to date, just precising one can get the list of available env variable from --help) would help a lot

thanks

@allan-simon Thanks. I'll add that to the readme.

There's no need to keep re-running it. Just edit /etc/gitlab-runner/config.toml, then restart the service.

@jonathon-reinhart it's just to have things in a reproducible way, the goal was to have a one-liner to permit every single workstation here to run a docker with gitlab-multi-runner on it, and "edit a file and restart the service" does not scale.

@allan-simon Fair enough. That makes sense.

Added ~60197 label

Milestone changed to v1.0

Milestone changed to v1.1

Milestone changed to v1.0

mentioned in merge request !79 (merged)

This is covered by https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/merge_requests/79

Status changed to closed

mentioned in commit pjmorr/gitlab-ci-multi-runner@45c32b12

added Documentation and removed ~60197 labels