[MESOS-6766] HealthChecker launches helper binary during each health check attempt.

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.1.0, 1.2.0
• Labels: health-check mesosphere
• Epic Link: TaskCheckingPerformance
• Assignee: Unassigned
• Reporter: Alex R
• Created: 09/Dec/16 03:01
• Updated: 06/Apr/17 09:26

Description

Currently the HealthChecker library launches a helper binary (curl for HTTP, mesos-tcp-connect for TCP, <user-command> for COMMAND) each time it attempts a health check. While it is unavoidable for COMMAND health checks, for HTTP and TCP we can do better. We probably can't send requests and try TCP handshakes directly from the library, i.e., executor process, because appropriate namespaces should be entered, but we can launch the binary only once and keep it running alongside the task process till the task is running.