How to get a list of all Jenkins nodes assigned with label including master node?

Question

I\'m creating a Jenkins pipeline job and I need to run a job on all nodes labelled with a certain label.

Therefore I\'m trying to get a list of node names assigned with

Answer 1

Update to @patrick-b answer : contains can be buggy if you have labels containing same string, I've added a split step do check every label separated with spaces.

@NonCPS
def hostNames(label) {
    def nodes = []
    jenkins.model.Jenkins.get.computers.each { c ->
        c.node.labelString.split(/\s+/).each { l ->
            if (l != null && l.equals(label)) {
                nodes.add(c.node.selfLabel.name)
             }
        }
    }

    return nodes
}