riemann-kvm.rb

require 'riemann/client'

c = Riemann::Client.new host: 'euca-riemann', port: 5555

#find out my hostname
host = %x[hostname]

#first determine how many instances I have according to libvirt
kvm_instances = %x[virsh list |grep i-|wc -l]

#write it out to the console for now just to make sure I've got what I am expecting
puts kvm_instances.to_i

# then sends it ro riemann 
c << {host: host, service: 'KVM', state: 'info', description: 'Number of KVM virtual machines currently running', metric: kvm_instances.to_i,}