System monitor and Kubernetes readiness probe

The scale-monitor sidecar container has the following objectives:

• Runs the containermon service which is monitoring the service (GUI, pmcollector) in the same pod.
• Provides a readiness probe API (HTTPS).
• Sends the health status and events back to the core pod on the same worker node.
• Core pod is forwarding the events to GUI or mmhealth.
• Provides an API for call home data collection.
• Has several debug tools installed and can be used for problem determination.

For more information, see Container probes in Kubernetes documentation.

If the monitoring status is HEALTHY, the probe returns success 200. When the "unreadyOnFailed" option is enabled in containermon.conf (default=true), any FAILED state causes the probe to return 500. When a critical event occurred which has the "container_unready=True" flag, the probe returns 501. When the service faces an issue, for example, no service found, it returns 502.