<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=22745) </details> <!--IssueSummary end--> ### Problem to solve Now `Gitlab::RepositoryCheckLogger` is a plain `Gitlab::Logger`, this should become a `Gitlab::JsonLogger`. This might also fix gitlab-ce#44404 ### Further details This will generate structured logs, making it easier to parse with Kibana. ### What does success look like, and how can we measure that? Parseable logs with Kibana :all_the_things:. ### Links / references https://gitlab.slack.com/archives/C32LCGC1H/p1525797511000073