Help to parse JSON key value object

[Hunk_Huang]

Hi Logstash Team.

I'd like to load data struct as below.
INPUT:
{
"vmdata":{
"vm1": "UP",
"vm2": "Down",
"vm3": "UP"
.....
}
}

OUTPUT:
event: vm1: "UP"
event: vm2: "Down"
....
event: ...

Anybody can help? very appreciate!

[Hunk_Huang]

Finally I am able to do it by ruby filter.

 ruby{
    init => "require 'json'"
    code => "
      event.get('[data][hostlist]').to_hash.each do |k,v|  
         newevent = event.clone
        newevent.set('vm',  k)
        newevent.set('status' , v)
        newevent.remove('vmdata')
        new_event_block.call(newevent)        
      end
    "
   }