Redirect_uri_mismatch error in Google OAuth

You are right. I would:

  • check in the Grafana UI if config is applied correctly (check Server Admin - use local admin user to check that)
  • try root_url = https://grafana.mydomain.net/ (please notice slash at the end)
  • try different Grafana version (I use similar setup with 6.6.2/7.1.3 without any issue)