How do I pass JNLP command arguments from a file?

Issue

We want to be able to launch a JNLP agent using command line options, nevertheless when the agent is running others could get connection information that we would prefer to hide from a ps command execution.

Environment

CloudBees CI (CloudBees Core) on modern cloud platforms - Managed controller
CloudBees CI (CloudBees Core) on modern cloud platforms - Operations Center
CloudBees CI (CloudBees Core) on traditional platforms - Client controller
CloudBees CI (CloudBees Core) on traditional platforms - Operations Center
CloudBees Jenkins Enterprise - Managed controller
CloudBees Jenkins Enterprise - Operations center
Jenkins LTS

Resolution

As described in one of the comments inside JENKINS-18342, we can create a file where each entry shown below must be in a different line:

params.txt

-jnlpUrl
https://somewhere/xx.jnlp
-secret
<SECRET>

Once that we save this file as params.txt we should be able to invoke the agent using the syntax shown below:

java -jar agent.jar @params.txt

Tested product/plugin versions

CloudBees CI (CloudBees Core) on traditional platforms - Client controller 2.176.4.3

References

Java Documentation: Jar files

This article is part of our Knowledge Base and is provided for guidance-based purposes only. The solutions or workarounds described here are not officially supported by CloudBees and may not be applicable in all environments. Use at your own discretion, and test changes in a safe environment before applying them to production systems.