hosts: [
  { host_ip: "10.100.198.200", host_name: "onosdev"},
  { host_ip: "10.100.198.201", host_name: "onos1"},
  { host_ip: "10.100.198.202", host_name: "onos2"},
  { host_ip: "10.100.198.203", host_name: "onos3"},
]