Run a remote command on all Jenkins slaves via Masters's script console

Question

I want to run same shell command (very simple shell commands like ls) on all the UNIX slaves which are connected to the master by using the master\'s script co

Answer 1

The pipeline looks something like this:

stages  {
      stage('Checkout repo') {
         steps  {
            //checkout what I need
         }
      }
      stage('Generate Jobs')  {
         steps  {
            jobDsl targets:'generate_projects.groovy',
         }
      }
      stage('Build Projects')  {
         steps  {
            build job: "build-all",
            propagate: true,
            wait: true
         }
      }
   }

and then is file generate_projects.groovy, where the actually DSL generation is:

for (agent in hudson.model.Hudson.instance.slaves) {
   if (!agent.getComputer().isOffline())  { // check that agent is not offline
      node = jenkins.model.Jenkins.instance.getNode(agent.name)  // get agent name
      agentIPs = node.computer.getChannel().call(new ListPossibleNames())
      agentIP = agentIPs[0]  // get agent IP
      
      //Create a job that will run on that specific agent
      jobName = FOLDER + '/' + agent.name     // need to create different names
      job(jobName)
      {
         label(agent.name)
         steps
         {
             shell()
         }
      }
   }
}

Beside the above generation of the jobs, you'll need to keep a list of jobs that were generated and add all its elements in "build-all" pipeline job, that will look something like:

parallel(
   b0: {build '' + agent.name'},
   b1: {build '' + agent.name'},
   b2: {build '' + agent.name'},
   .....
)
failFast: false

So when you run the pipeline, a job for each agent will be created, and all new created jobs will run in parallel. I use it for updating setup scenario.