define host{
host_name host1
address 192.168.0.1
hostgroups HOSTGROUP1
}
define host{
host_name host2
address 192.168.0.2
hostgroups HOSTGROUP1
}
define host
host_name host3
address 192.168.0.3
hostgroups HOSTGROUP1
}
define host{
host_name host4
address 192.168.0.4
hostgroups HOSTGROUP1
}
define hostgroup{
hostgroup_name HOSTGROUP1
}
define hostgroup{
hostgroup_name HOSTGROUP2
members host1,host2,host3,host4
}