`Serf`で管理していないノードのグラフを削除する

delete_graphs.rb

#!/opt/sensu/embedded/bin/ruby

require 'growthforecast'

# Create `Growthforecast` instance:
gf = GrowthForecast.new('localhost', 5125)

glist = gf.graphs()

glist.each do |graph|

  # Do nothing if the graph's name does not start with `host:`:
  next unless graph.service_name =~ /^host:/

  # delete the graph if the graph's name does not include the hostnames of `serf members`:
  hostname = graph.service_name.sub(/^host:/, '')
  unless `serf members | awk ' { print $1 } '`.include?(hostname)

    gf.delete(graph)

  end

end