Class: LoadNode

Inherits:
Object
  • Object
show all
Defined in:
lib/load/load_node.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(run_id, server_address, node_code = nil) ⇒ LoadNode

Returns a new instance of LoadNode.



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# File 'lib/load/load_node.rb', line 19

def initialize(run_id, server_address, node_code = nil)
  if (@@load_node_instance != nil)
    raise "LoadNode instance initialized a second time"
  end
  @target_code = target_code
  @test_index = 1
  @messenger = nil
  @@load_node_instance = self
  @factory = TestFactory.new
  if (server_address == nil)
    # Perf tests don't require server
  else
    begin
      puts "Registering node"
      @run_id = run_id
      @child_pids = []
      @messenger = HttpReport.new(server_address)
      node_info = @messenger.node_register({run_id: @run_id, address: "#{Socket.gethostname}", code: node_code})
      if (node_info['configuration'] == nil)
        puts "Error starting node.  Did run already complete?"
      else  
        @configuration = eval(node_info['configuration'])
        @node_id = node_info["id"].to_i
        @node_code = node_info["code"]
        @target_code = node_info["target_server"]
        @target_server = @configuration[:servers][@target_code.to_sym]
        puts "Node registered: #{@node_id}   Code: #{@node_code}   Target server: #{@target_server}"
        @schedule = @messenger.node_schedule({node_id: @node_id})
        @load_tests = create_node_tests(@node_id, @schedule)
        @duration_millis = node_info["duration"]
        @messenger.node_ready({node_id: @node_id})
        wait_for_node_start_ok
        launch_node_tests
        wait_for_finish
        @messenger.node_finished({node_id: @node_id})
      end
    rescue Interrupt => e
      puts "NODE (#{@node_id}) - Interrupt signal received, quitting.  [#{self.class}]"
    rescue Exception => exc
      puts "Exception in node: #{exc.message} \n" + exc.backtrace.join("\n")
    ensure
      kill_child_processes
    end
    #exit 0
  end
end

Instance Attribute Details

#duration_millis ⇒ Object (readonly)

Returns the value of attribute duration_millis.



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# File 'lib/load/load_node.rb', line 12

def duration_millis
  @duration_millis
end

#node_id ⇒ Object (readonly)

Returns the value of attribute node_id.



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# File 'lib/load/load_node.rb', line 12

def node_id
  @node_id
end

#schedule ⇒ Object (readonly)

Returns the value of attribute schedule.



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# File 'lib/load/load_node.rb', line 12

def schedule
  @schedule
end

#target_code ⇒ Object

Returns the value of attribute target_code.



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# File 'lib/load/load_node.rb', line 13

def target_code
  @target_code
end

#target_server ⇒ Object

Returns the value of attribute target_server.



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# File 'lib/load/load_node.rb', line 13

def target_server
  @target_server
end

Class Method Details

.instance ⇒ Object 



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# File 'lib/load/load_node.rb', line 15

def self.instance
  return @@load_node_instance
end

Instance Method Details

#create_node_tests(node_id, node_schedule) ⇒ Object 



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# File 'lib/load/load_node.rb', line 131

def create_node_tests(node_id, node_schedule)
  wasp_id = 1
  load_tests = []

  puts "Node Schedule:"
  node_schedule.each do |test_schedule|
    test_name = test_schedule["test_name"]
    events = test_schedule["events"]
    sched_text = "Test: #{test_name}  Events: "
    events.each do |event|
      sched_text += "#{event['action'].capitalize} at #{event['time']} sec     "
    end
    test_config = find_config_for_test(test_name)
    test = @factory.create_test(test_name, @target_code, test_config)
    test.index = @test_index
    @test_index += 1
    
    load_test = LoadTest.new(self, @run_id, node_id, wasp_id, test, events, @messenger)
    load_tests << load_test
    wasp_id += 1
  end
  
  node_monitors = @messenger.node_monitors( {node_id: @node_id} )
  node_monitors.each do |monitor_config|
    type = monitor_config["type"]
    name = monitor_config["name"]
    duration = monitor_config["duration"].to_i / 1000
    if (name == nil)
      name = "#{type.capitalize} Monitor"
    end
    
    if (type == "network")
      puts "Config: #{monitor_config}"
      address = monitor_config["address"]
      monitor = NetworkMonitor.new(address)
    elsif (type == "cpu")
      monitor = CpuMonitor.new()
    elsif (type == "file.io")
      monitor = FileIoMonitor.new()
    elsif (type == "ram")
      monitor = RamMonitor.new()
    else
      raise "Do no know how to handle monitor type: #{type}   Name: #{name}"
    end
    
    events = [{"time" => "0", "action"  => "run"}, {"time" => "#{duration}", "action" => "pause"}]
    load_test = LoadTest.new(self, @run_id, node_id, wasp_id, monitor, events, @messenger)
    load_tests << load_test
    wasp_id += 1
  end
  
  return load_tests
end

#find_config_for_test(test_name) ⇒ Object 



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# File 'lib/load/load_node.rb', line 185

def find_config_for_test(test_name)
  test_configs = @configuration[:tests]
  test_configs.each do |test_config|
    if (test_config[:test] == test_name)
      return test_config
    end
  end
end

#kill_child_processes ⇒ Object 



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# File 'lib/load/load_node.rb', line 195

def kill_child_processes
  # puts "=================================================================================="
  # puts "Node Finished: #{@node_id}"
  # puts "  Killing child PID's:  #{@child_pids}"
  # puts "=================================================================================="

  # trap("INT") do
  #   exit
  # end
  Process.kill('INT', -Process.getpgrp)
  # 
  # @child_pids.each do |pid|
  #   begin
  #     puts "Killing: #{pid}"
  #     Process.kill("INT", pid)
  #   rescue Exception => e
  #     puts "Exception killing pid #{pid}.  #{e.message}"
  #   end
  # end
end

#launch_node_tests ⇒ Object 



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# File 'lib/load/load_node.rb', line 77

def launch_node_tests
  @load_tests.each do |test|
    pid = fork {
      test.run
    }
    @child_pids << pid
    write_pid_to_file(pid)
  end
end

#report_block_result(test_code, wasp_id, time_ellapsed, benchmark_time, result) ⇒ Object 



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# File 'lib/load/load_node.rb', line 66

def report_block_result(test_code, wasp_id, time_ellapsed, benchmark_time, result)
  @messenger.report_result(@run_id, @node_id, test_code, wasp_id, time_ellapsed, benchmark_time, result)
end

#wait_for_finish ⇒ Object 



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# File 'lib/load/load_node.rb', line 103

def wait_for_finish
    @start_time = Time.now.to_i
    quit = false
    while !quit
      sleep 10
      ellapsed_time = Time.now.to_i - @start_time
      if (ellapsed_time > (@duration_millis / 1000))
        quit = true
        puts "Node duration reached: #{@duration_millis} seconds.  Node quitting"
      else
        #puts "Node duration (#{ellapsed_time} secs) NOT reached: #{@duration_millis/1000} seconds."
      end
      @messenger.node_schedule({node_id: @node_id})
      
      status = @messenger.status_for_test(@run_id, nil)
      if (status['run_status'] == "killed")
        puts "XXXXX  RUN HAS BEEN KILLED - KILLING NODE: #{@wasp_id}  XXXXXXX"
        quit = true
      elsif (status['run_status'] == "finished")
        puts "XXXXX  RUN IS FINISHED - KILLING NODE: #{@wasp_id}  XXXXXXX"
        quit = true
      end
      
    end
    puts "Node finished.  ##{@node_code}"
end

#wait_for_node_start_ok ⇒ Object 



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# File 'lib/load/load_node.rb', line 88

def wait_for_node_start_ok
  ok_to_start = false
  last_message_at = 0
  while (!ok_to_start)
    ok_to_start = @messenger.node_start?({node_id: @node_id})
    sleep 0.2
    if (Time.new.to_i - last_message_at > 5)
      puts "Node waiting for other nodes to start (#{@node_code})"
      last_message_at = Time.new.to_i
    end
  end
  puts "All Nodes Launched.  Node (#{@node_code}) can start now "
end

#write_pid_to_file(pid) ⇒ Object 



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# File 'lib/load/load_node.rb', line 71

def write_pid_to_file(pid)  
  open('node_pids_#{@node_id}.pid', 'a') { |f|
    f.puts "#{pid}\n"
  }
end