Class: Fluent::CloudStackInput

Inherits:
Input
  • Object
show all
Defined in:
lib/fluent/plugin/in_cloudstack.rb

Constant Summary collapse

INTERVAL_MIN = 
300

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CloudStackInput 



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 22

def initialize
  require "fog"
  require "eventmachine"
  init_eventmachine

  super
end

Instance Attribute Details

#before_events=(value) ⇒ Object (writeonly)

Sets the attribute before_events



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 20

def before_events=(value)
  @before_events = value
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 30

def configure(conf)
  super

  @conf = conf

  unless @host && @apikey && @secretkey
    raise ConfigError, "'host' and 'apikey' and 'secretkey' must be all specified."
  end

  unless @debug_mode
    if @interval.to_i < INTERVAL_MIN
      raise ConfigError, "'interval' must be over #{INTERVAL_MIN}."
    end
  end

  @before_events_filepath = "logs/before_events.#{tag}.yml"

  if File.exist?(@before_events_filepath)
    @before_events = YAML.load_file(@before_events_filepath)
  else
    @before_events = nil
  end

  @before_usages_filepath = "logs/before_usages.#{tag}.yml"
  if File.exist?(@before_usages_filepath)
    @before_usages = YAML.load_file(@before_usages_filepath)
  else
    @before_usages = Hash.new
  end

  @event_output_tag = "#{@tag}.event"
  @usages_output_tag = "#{@tag}.usages"

end

#cs ⇒ Object 



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 192

def cs
  @@cs ||= Fog::Compute.new(
      :provider => 'CloudStack',
      :cloudstack_api_key           => @apikey,
      :cloudstack_secret_access_key => @secretkey,
      :cloudstack_host              => @host,
      :cloudstack_port              => @port,
      :cloudstack_path              => @path,
      :cloudstack_scheme            => @protocol,
  )
end

#emit_new_events ⇒ Object 



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 91

def emit_new_events
  new_events = get_new_events
  new_events.each do |event|
    time = Time.parse(event["created"]).to_i
    Engine.emit(@event_output_tag, time, event)
  end

  Engine.emit("#{@usages_output_tag}", Engine.now, {"events_flow" => new_events.size})
end

#emit_usages ⇒ Object 



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 101

def emit_usages
  usages = get_usages

  Engine.emit("#{@usages_output_tag}", Engine.now, get_usages)
end

#get_new_events ⇒ Object 



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 107

def get_new_events
  if @before_events
    startdate = Time.parse(@before_events[0]["created"])
    event_responses = cs.list_events(:startdate => startdate.strftime("%Y-%m-%d %H:%M:%S"), :domainid => @domain_id)
    events = Array.new
    event_responses["listeventsresponse"]["event"].each do |event|
      unless Time.parse(event["created"]) == startdate
        events.push event
      end
    end
  else
    events = cs.list_events(:domainid => @domain_id)["listeventsresponse"]["event"]
  end

  if events.size > 0
    File.write(@before_events_filepath, events.to_yaml)
    @before_events = events
  end

  events
end

#get_usages ⇒ Object 



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 129

def get_usages
  usages_per_service_offering   = Hash.new(0)
  usages_per_disk_offering      = Hash.new(0)
  memory_sum      = 0
  cpu_sum         = 0
  root_volume_sum = 0
  data_volume_sum = 0

  vms_responses = cs.list_virtual_machines(:domainid=>@domain_id)
  vms =  vms_responses["listvirtualmachinesresponse"]["virtualmachine"]

  if vms
    vms.each do |vm|
      memory_sum += vm["memory"].to_i * 1024 * 1024
      cpu_sum += vm["cpunumber"].to_i
      usages_per_service_offering[vm["serviceofferingname"]] += 1
    end
  else
    vms = []
  end

  volumes_responses = cs.list_volumes(:domainid=>@domain_id)
  volumes =  volumes_responses["listvolumesresponse"]["volume"]

  if volumes
    volumes.each do |volume|
      case volume["type"]
      when "ROOT"
        root_volume_sum += volume["size"]
      when "DATADISK"
        data_volume_sum += volume["size"]
        usages_per_disk_offering[volume["diskofferingname"].gsub(' ','_')] += 1
      end
    end
  end

  usages = Hash.new

  usages[:vm_sum]          = vms.size
  usages[:memory_sum]      = memory_sum
  usages[:cpu_sum]         = cpu_sum
  usages[:root_volume_sum] = root_volume_sum
  usages[:data_volume_sum] = data_volume_sum

  usages_per_service_offering.each do |key,value|
    usages[key] = value
  end
  usages_per_disk_offering.each do |key,value|
    usages[key] = value
  end

  @before_usages.each do |key,value|
    unless usages.key?(key)
      usages[key] = 0
    end
  end

  File.write(@before_usages_filepath, usages.to_yaml)
  @before_usages = usages

  usages
end

#run ⇒ Object 



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 79

def run
  EM.add_periodic_timer(@interval) do
    begin
      emit_new_events
      emit_usages
    rescue => ex
      $log.warn("EM.periodic_timer loop error.")
      $log.warn("#{ex}, tracelog : \n#{ex.backtrace.join("\n")}")
    end
  end
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 72

def shutdown
  super
  @thread.join
  EM.stop if EM.reactor_running?
  @reactor_thread.join if @reactor_thread
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/in_cloudstack.rb', line 65

def start
  super
  run_reactor_thread
  @thread = Thread.new(&method(:run))
  $log.info "listening cloudstack api on #{@host}"
end