Add `-noReconnectAfter` option support

[Vlatombe]

• [ ] Downstream of https://github.com/jenkinsci/remoting/pull/738

Testing done

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[jglick]

Do we really need this? I feel like we should deprecate the env vars in this launcher script except for one catch-all REMOTING_OPTS var with whatever CLI options you like; then https://github.com/jenkinsci/kubernetes-plugin/blob/f10083a42e708a6bff990c6ccb306ce618b8bccd/src/main/java/org/csanchez/jenkins/plugins/kubernetes/PodTemplateBuilder.java#L415-L449 could (eventually, once adopted) be simplified to just construct its list of CLI options directly without needing to make further changes to this image beyond routine JAR bumps.

[dduportal]

Do we really need this? I feel like we should deprecate the env vars in this launcher script except for one catch-all REMOTING_OPTS var with whatever CLI options you like; then https://github.com/jenkinsci/kubernetes-plugin/blob/f10083a42e708a6bff990c6ccb306ce618b8bccd/src/main/java/org/csanchez/jenkins/plugins/kubernetes/PodTemplateBuilder.java#L415-L449 could (eventually, once adopted) be simplified to just construct its list of CLI options directly without needing to make further changes to this image beyond routine JAR bumps.

Good idea! Just be warned that there are other use cases of this launcher script AFAIK such as static agents or docker plugin for example.

[jglick]

Yes, and for compatibility we need to continue to support the currently defined variables, I am just suggesting that going forward we deprecate them in favor of a generic launcher options variable. Would also allow us to deprecate and eventually remove messy stuff like https://github.com/jenkinsci/docker-agent/blob/611dc9df849eee9334a3351a6a520e2106116dc3/jenkins-agent#L60-L61 https://github.com/jenkinsci/docker-agent/blob/611dc9df849eee9334a3351a6a520e2106116dc3/jenkins-agent#L131-L132

You can already pass any arguments you like to the entrypoint ("$@") but for purposes of some cloud impls like PodTemplateBuilder it is easier to set environment variables.

[Vlatombe]

I had forgotten about that, let's just close this.

[Vlatombe]

any arguments you like to the entrypoint

Only on linux, the windows launcher script is missing this option.

Filed https://github.com/jenkinsci/docker-agent/pull/809 as a draft.