Jenkins - Is there a way to remove all offline nodes (slaves) / batch remove nodes / delete all nodes?

Question

While using the Jenkins Docker Plugin, probably because of an error, swarms cannot be launched. I didn't pay attention and at the moment I have thousands of offline nodes, that were failed to launch.

BOTTOM LINE - Is there a way to batch remove nodes (slaves) in Jenkin, clean all offline nodes or even delete all nodes? Restating the Jenkins server didn't help, and I couldn't find a way in the Jenkins API.

Will appreciate any idea, before I'm starting to write a Selenium script or something...

Many thanks!

Answer 1

This is the Copy>Paste>Run version of KeepCalmAndCarryOn answer. Go to manage Jenkins > Script Console > copy & paste this code > Run

for (aSlave in hudson.model.Hudson.instance.slaves) {
    if (aSlave.getComputer().isOffline()) {
        aSlave.getComputer().setTemporarilyOffline(true,null);
        aSlave.getComputer().doDoDelete();
    }
}