[MESOS-6417] Introduce an extra 'unknown' health check state.

• Type: Improvement
• Status: Accepted
• Priority: Major
• Resolution: Unresolved
• Labels: health-check mesosphere
• Epic Link: TaskCheckingImprovements
• Story Points: 5
• Assignee: Greg Mann
• Reporter: Alex R
• Shepherd: Alex R
• Created: 19/Oct/16 10:41
• Updated: 03/Jan/19 17:56

Description

There are three logical states regarding health checks:
1) no health checks;
2) a health check is defined, but no result is available yet;
3) a health check is defined, it is either healthy or not.

Currently, we do not distinguish between 1) and 2), which can be problematic for framework authors.

Issue Links

• is related to: MESOS-6833 consecutive_failures 0 == 1 in HealthCheck.