Automatic boostrapping of Mesos slaves in Jenkins

connect-slave.sh

#!/bin/bash
curl -sSL -XPOST -H "Content-Type: application/json" -d @- "http://marathon.mesos:8080/v2/apps" <<END
{
  "id": "/jenkins/build/$3",
  "cpus": 1,
  "mem": 8192,
  "instances": 1,
  "cmd": "java -jar slave.jar -jnlpUrl http://$1/jenkins/computer/$3/slave-agent.jnlp -secret $4",
  "constraints": [["hostname", "CLUSTER", "$2"]],
  "uris": [
    "http://$1/jenkins/jnlpJars/slave.jar"
  ]
}
END

connect-slaves.groovy

// Put in Jenkins' init.groovy.d directory
import groovy.json.*
import jenkins.model.*
import hudson.slaves.*

def     env       = System.getenv()
String  host      = env['HOST']
int     port      = env['PORT0']?.toInteger() ?: 8080

def     jenkins   = Jenkins.getInstance()
def     nodeMgr   = jenkins.getNodesObject()
def     launcher  = new JNLPLauncher()

Thread.start {
  def slavesJson = "http://leader.mesos:5050/slaves".toURL().getText()
  def nodes = []
  new JsonSlurper().parseText(slavesJson)["slaves"].each {
    def parts = it.id.split('-')
    name = "${parts[0]}-${parts[-1]}".toLowerCase()
    def slave = new DumbSlave(name, "/tmp", launcher)
    nodeMgr.addNode(slave)
    nodes << [name: name, hostname: it.hostname, slave: slave]
  }
  nodeMgr.save()

  nodes.each {
    println "connect-slave.sh $host:$port ${it.hostname} ${it.name} ${it.slave.getComputer().getJnlpMac()}".execute().text
  }
}