Jenkins: skip if node is offline

Question

I have a task that executes on n machines based on a label. If for some reason, some of these machines are offline, I do not want Jenkins to put them in a queue

Answer 1

A fine solution can be achieved using GroovyAxis Plugin and the following script, that will return Axis list of online slaves only:

def axis = []
for (slave in hudson.model.Hudson.instance.slaves) {
 if (slave.getComputer().isOnline().toString() == "true") {
   axis += slave.name
 }
}
return axis

UPDATE: Since Jenkins 2.0 the node API has been changed, so use Node.toComputer() instead: http://javadoc.jenkins-ci.org/hudson/model/Node.html#toComputer%28%29

def axis = []
for (slave in jenkins.model.Jenkins.instance.getNodes()) {
 if (slave.toComputer().isOnline()) {
    axis += slave.getDisplayName()
 }
}
return axis