nodes:
   - name: node3-control
     tags: control      #optional param, other valid value "compute"
     arch: "x86_64"
     mac_address: "10:23:45:67:89:AC" #pxe boot interface mac
     cpus: 2            #required only for virtual deployments
     memory: 2048       #required only for virtual deployments
     disk: 40           #required only for virtual deployments
     power:
       type: ipmi
       address: 10.4.7.3
       user: root
       pass: root