Class: LogStash::Inputs::Ngc

Inherits:
Base
  • Object
show all
Defined in:
lib/logstash/inputs/ngc.rb

Overview

Periodically run a shell command and capture the whole output as an event.

Notes:

  • The ‘script` field of this event will be the python script run.

  • The ‘api_key` field of this event will be the key used to access NGC.

Instance Method Summary collapse

Instance Method Details

#execute(queue) ⇒ Object

Execute a given command

Parameters:

  • A (String) —

    command string

  • A (Array or Queue) —

    queue to append events to



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# File 'lib/logstash/inputs/ngc.rb', line 72

def execute(queue)
  start = Time.now
  output = exit_status = nil
  begin
    output, exit_status = run_script()
  rescue StandardError => e
    @logger.error("Error while running script",
      :script => @script, :e => e, :backtrace => e.backtrace)
  rescue Exception => e
    @logger.error("Exception while running script",
      :script => @script, :e => e, :backtrace => e.backtrace)
  end
  duration = Time.now - start
  @logger.debug? && @logger.debug("Command completed", :script => @script, :duration => duration)
  if output
    @codec.decode(output) do |decoded|

      @jwt_token = decoded.get("token")

      decoded.get("values").each do |val|
        event = LogStash::Event.new(val)
        decorate(event)
        event.set("[@metadata][host]", @hostname)
        event.set("[@metadata][duration]", duration)
        event.set("[@metadata][exit_status]", exit_status)
        queue << event
      end
    end
  end
  duration
end

#register ⇒ Object 



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# File 'lib/logstash/inputs/ngc.rb', line 39

def register
  @logger.info("Registering Exec Input", :type => @type, :script => @script, :interval => @interval, :schedule => @schedule)
  @hostname = Socket.gethostname
  @io       = nil
  
  if (@interval.nil? && @schedule.nil?) || (@interval && @schedule)
    raise LogStash::ConfigurationError, "jdbc input: either 'interval' or 'schedule' option must be defined."
  end
end

#run(queue) ⇒ Object

def register



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# File 'lib/logstash/inputs/ngc.rb', line 49

def run(queue)
  if @schedule
    @scheduler = Rufus::Scheduler.new(:max_work_threads => 1)
    @scheduler.cron @schedule do
      execute(queue)
    end
    @scheduler.join
  else
    while !stop?
      duration = execute(queue)
      wait_until_end_of_interval(duration)
    end # loop
  end
end

#stop ⇒ Object

def run



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# File 'lib/logstash/inputs/ngc.rb', line 64

def stop
  close_io()
  @scheduler.shutdown(:wait) if @scheduler
end