Use structured logging for DB load balancer
What does this MR do?
Relates to https://gitlab.com/gitlab-org/gitlab-ee/issues/13547 and https://gitlab.com/gitlab-org/gitlab-ee/issues/13548
CE backport of doc changes: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/32051
Does this MR meet the acceptance criteria?
Conformity
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Changelog entry -
Documentation created/updated or follow-up review issue created -
Code review guidelines -
Merge request performance guidelines -
Style guides -
Database guides -
Separation of EE specific content
Performance and Testing
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Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process. -
Tested in all supported browsers
Security
If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:
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Label as security and @ mention @gitlab-com/gl-security/appsec -
The MR includes necessary changes to maintain consistency between UI, API, email, or other methods -
Security reports checked/validated by a reviewer from the AppSec team
Merge request reports
Activity
added database databasereview pending labels
1 Warning 
This merge request does not refer to an existing milestone. 1 Message 
This merge request adds or changes files that require a review from the Database team. This merge request requires a database review. To make sure these changes are reviewed, take the following steps:
- Ensure the merge request has database and databasereview pending labels. If the merge request modifies database files, Danger will do this for you.
- Use the Database changes checklist template or add the appropriate items to the MR description.
- Assign and mention the database reviewer suggested by Reviewer Roulette.
The following files require a review from the Database team:
ee/lib/gitlab/database/load_balancing.rbee/lib/gitlab/database/load_balancing/host.rbee/lib/gitlab/database/load_balancing/load_balancer.rbee/lib/gitlab/database/load_balancing/logger.rb
Reviewer roulette
Changes that require review have been detected! A merge request is normally reviewed by both a reviewer and a maintainer in its primary category (e.g. frontend or backend), and by a maintainer in all other categories.
To spread load more evenly across eligible reviewers, Danger has randomly picked a candidate for each review slot. Feel free to override this selection if you think someone else would be better-suited, or the chosen person is unavailable.
Once you've decided who will review this merge request, mention them as you normally would! Danger does not (yet?) automatically notify them for you.
Category Reviewer Maintainer database Adam Hegyi ( @ahegyi)Andreas Brandl ( @abrandl)backend Etienne Baqué ( @ebaque)Rémy Coutable ( @rymai)Generated by
Edited by 🤖 GitLab Bot 🤖added groupconfigure [DEPRECATED] label and removed database databasereview pending labels
added backend backstage [DEPRECATED] labels
added database databasereview pending labels
added 2 commits
marked the checklist item Changelog entry as completed
marked the checklist item Documentation created/updated or follow-up review issue created as completed
marked the checklist item Merge request performance guidelines as completed
marked the checklist item Merge request performance guidelines as incomplete
