cloud-config.yml

 #cloud-config
 write_files:
   - path: /tmp/startup.sh
     permissions: 0755
     content: |
         #!/bin/bash
         sleep 10
         export JENKINS_URL='http://master'
         export USER='user:api_key'
         export LABELS='{{properties['buildName']}}'
         export SLAVE_NAME="{{properties['buildName']}}-`/usr/bin/hostname`"
         systemctl stop update-engine
         chmod 777 /var/run/docker.sock
         mkdir /ci/jenkins
         chmod 777 /ci/jenkins
         sleep 10
         docker pull jmaitrehenry/docker-jenkins-jnlp
         docker run -d -v /var/run/docker.sock:/var/run/docker.sock \
             -e JENKINS_URL=$JENKINS_URL \
             -e LABELS=$LABELS \
             -e USER=$USER \
             -e JENKINS_AGENT_NAME=$SLAVE_NAME \
             -e EXECUTORS=1 \{% if properties['dockerPreloadImage'] %}
             -e DOCKER_PRELOAD_IMAGES='{{properties['dockerPreloadImage']}}' \{% endif %}
             -v /ci/jenkins:/ci/jenkins \
             jmaitrehenry/docker-jenkins-jnlp
   - path: /home/core/.docker/config.json
     content: |
       {
         "auths": {
           "": {"auth": "{{properties[dockerToken]}}"}
         }
       }
 coreos:
    update:
      reboot-strategy: "off"
    units:
      - name: "jenkins-startup.service"
        command: "start"
        content: |
          [Unit]
          Description=Jenkins container
          Author=Me
          After=docker.service
          [Service]
          ExecStart=/tmp/startup.sh