[JAMES-2526] Implement health check endpoint

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.2.0
• Component/s: utils
• Assignee: Unassigned
• Reporter: Antoine Duprat
• Created: 22/Aug/18 12:21
• Updated: 07/Jun/19 11:01
• Resolved: 29/Aug/18 14:29

Description

Define a HealthCheck API in james-core
Then write a webadmin endpoint performing the checks and returning a 200 status code if all checks are allright or a 500 status if some checks are failing.
Authentication bypass is needed for that route.

Finally, implement a IsStartedHealthCheck.
You can base yourself on the IsStartedProbe defined here: https://github.com/linagora/james-project/pull/1646/commits/febb9f17cc0915f245e7a7f0fa9fcf8ed1750816