Controller and Agent provide metrics from jstat

Feature
On Controller and Agent start-up JVM metrics can be provided via jstat.

To create metric data, users can assign the JS7_METRICS variable the value 1 in the related metrics script.

• Unix
  • ./bin/controller_metrics.sh
  • ./bin/agent_metrics.sh
• Windows
  • .\bin\controller_metrics.cmd
  • .\bin\agent_metrics.cmd

#! /bin/sh
#  ------------------------------------------------------------
#  Company: Software- und Organisations-Service GmbH
#  Purpose: Java metrics by jstat for JS7 Controller
#  ------------------------------------------------------------

set -e

##########################
# jstat metrics
# see https://docs.oracle.com/en/java/javase/17/docs/specs/man/jstat.html
# set this value of JS7_METRICS to 1 if jstat is to be called when the Controller starts
# Set JAVA_HOME in controller_instance.sh if jstat is not in the path 
JS7_METRICS=1

The ./bin/(controller|agent)_metrics.(sh|cmd) script is executed once during start or restart.
If metrics are no longer needed, then jstat must be terminated from the process list and the JS7_METRICS variable must be reset to 0.

Maintainer Notes

• Users operating Prometheus can integrate JS7 products with the tool.
• This offers use of Grafana Dashbaords for visualization of metrics.