Check controller/workers agent versions

check_controller_workers_versions.groovy

import jenkins.model.*
import hudson.remoting.Launcher
import hudson.slaves.SlaveComputer

def expectedVersion = Launcher.VERSION
for (computer in Jenkins.instance.getComputers()) {
  if (! (computer instanceof SlaveComputer)) continue
  if (!computer.getChannel()) continue
	
  def version = computer.getSlaveVersion()
  if (!expectedVersion.equals(version)) {
    println "${computer.name} - expected ${expectedVersion} but got ${version}"
    if (computer.node.labelString.contains('kubernetes')) {
      println "  - this is acceptable for kube (docker image based) workers."
    } else if (computer.name.contains('attic.com')) {
      println "  - kill the 'java -jar agent.jar...' process. It will respawn in 3 minutes. <<== Eloy"
      println "  - PLEASE, ensure that the worker in NOT RUNNING ANY job, before"
      println "    restarting the slave. If not, those jobs in the worker will"
      println "    die with CONNECTION PROBLEM."
    } else {
      println "  - it's recommended to kill '/usr/local/bin/jenkins.sh' in the iron"
      println "    worker to force it to get matching agent version from controller."
      println "    (sudo service jenkins-slave restart should be also ok)"
      println "  - PLEASE, ensure that the worker in NOT RUNNING ANY job, before"
      println "    restarting the slave. If not, those jobs in the worker will"
      println "    die with CONNECTION PROBLEM."
    }
  } else {
    println "${computer.name} - ok - got expected ${version}"
  }
}