Is DNS required to register gitlab runner?

Question

When i register a runner with https://34.66.66.103/gitlab/ as url , it throws the below error. but when i add a dns to it. it works fine!. I'm just wondering is DNS really required for runner registration? Can't runners be registered to gitlab with an elb ?

    ERROR: Registering runner... failed                 runner=zMXQGYf_ status=couldn't execute POST against https://34.66.66.103/gitlab/api/v4/runners: Post https://34.66.66.103/gitlab/api/v4/runners: x509: cannot validate certificate for 34.66.66.103 because it doesn't contain any IP SANs
    PANIC: Failed to register this runner. Perhaps you are having network problems

Answer 1

As @Patrick Mevzek pointed out in the comments, your error seems to be an issue with the IP config, not with Gitlab Runners.

The end of your error message states: cannot validate certificate for 34.66.66.103 because it doesn't contain any IP SANs

Either try adding IP SANs to your IP, or try to use DNS.

Looks like someone here had a similar issue: https://github.com/prometheus/prometheus/issues/1654