riemann.test.rb

class Riemann::Bench
  attr_accessor :client, :hosts, :services, :states
  def initialize
    @hosts = [nil] + (0...100).map { |i| "host#{i}" }
    @services = %w(test1 test2 test3 foo bar baz xyzzy attack cat treat)
    @states = {}
    @client = Riemann::Client.new(:host => (ARGV.first || 'localhost'))
  end

  def evolve(state)
    m = state[:metric] + (rand - 0.5) * 0.1
    m = [[0,m].max, 1].min

    s = case m
    when 0...0.75
      'ok'
    when 0.75...0.9
      'warning'
    when 0.9..1.0
      'critical'
    end

    {
      :metric => m,
      :state => s,
      :host => state[:host],
      :service => state[:service],
      :description => "at #{Time.now}"
    }
  end
  
  def tick
#    pp @states
    hosts.product(services).each do |id|
      client << (states[id] = evolve(states[id]))
    end
  end

  def run
    start
    loop do
      sleep 0.05
      puts "tick"
      tick
    end
  end

  def start
    hosts.product(services).each do |host, service|
       puts host 
       puts service
      states[[host, service]] = {
        :metric => 0.5,
        :state => 'ok',
        :description => "Starting up",
        :host => host,
        :service => service
      }
    end
  end
end

Riemann::Bench.new.run