Class: Metrix::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/metrix/cli.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/metrix/cli.rb', line 13

def initialize(args)
  @args = args
  @system = false
  @interval = 10
  require "syslog/logger"
  Metrix.logger = Syslog::Logger.new("metrix")
end

Instance Attribute Details

#elastic_search_host ⇒ Object (readonly)

Returns the value of attribute elastic_search_host.



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# File 'lib/metrix/cli.rb', line 11

def elastic_search_host
  @elastic_search_host
end

#interval ⇒ Object (readonly)

Returns the value of attribute interval.



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# File 'lib/metrix/cli.rb', line 11

def interval
  @interval
end

#mongodb_host ⇒ Object (readonly)

Returns the value of attribute mongodb_host.



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# File 'lib/metrix/cli.rb', line 11

def mongodb_host
  @mongodb_host
end

#reporter ⇒ Object (readonly)

Returns the value of attribute reporter.



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# File 'lib/metrix/cli.rb', line 11

def reporter
  @reporter
end

Instance Method Details

#elastic_search? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/metrix/cli.rb', line 73

def elastic_search?
  !!@elastic_search
end

#elastic_search_status ⇒ Object 



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# File 'lib/metrix/cli.rb', line 85

def elastic_search_status
  Metrix.logger.info "fetching elasticsearch metrix"
  Net::HTTP.get(URI("http://127.0.0.1:9200/_status"))
end

#log_level ⇒ Object 



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# File 'lib/metrix/cli.rb', line 65

def log_level
  @log_level || Logger::INFO
end

#log_to_stdout ⇒ Object 



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# File 'lib/metrix/cli.rb', line 104

def log_to_stdout
  Metrix.logger = Logger.new(STDOUT)
  Metrix.logger.level = Logger::INFO
end

#mongodb? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/metrix/cli.rb', line 77

def mongodb?
  !!@mongodb
end

#mongodb_status ⇒ Object 



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# File 'lib/metrix/cli.rb', line 90

def mongodb_status
  Metrix.logger.info "fetching mongodb metrix"
  Net::HTTP.get(URI("http://127.0.0.1:28017/serverStatus"))
end

#nginx? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/metrix/cli.rb', line 81

def nginx?
  !!@nginx
end

#nginx_status ⇒ Object 



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# File 'lib/metrix/cli.rb', line 95

def nginx_status
  Metrix.logger.info "fetching mongodb metrix"
  Net::HTTP.get(URI("http://127.0.0.1:8000/"))
end

#opts ⇒ Object 



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# File 'lib/metrix/cli.rb', line 109

def opts
  require "optparse"
  @opts ||= OptionParser.new do |o|
    o.on("-v", "--version") do
      puts "metrix #{Metrix::VERSION}"
      exit
    end

    o.on("--nginx") do
      @nginx = true
    end

    o.on("--mongodb") do
      @mongodb = true
    end

    o.on("--elasticsearch") do
      @elastic_search = true
    end

    o.on("--graphite-host HOST") do |value|
      require "metrix/graphite"
      @reporter = Metrix::Graphite.new(value, 2003)
    end

    o.on("--opentsdb-host HOST") do |value|
      require "metrix/opentsdb"
      @reporter = Metrix::OpenTSDB.new(value, 4242)
    end

    o.on("--stdout") do
      require "metrix/reporter/stdout"
      @reporter = Metrix::Reporter::Stdout.new
      log_to_stdout
    end

    o.on("--debug") do
      @log_level = Logger::DEBUG
    end

    o.on("--no-syslog") do
      log_to_stdout
    end

    o.on("--processes") do
      require "metrix/process"
      @processes = true
    end

    o.on("--system") do
      require "metrix/system"
      @system = true
    end
  end
end

#processes? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/metrix/cli.rb', line 69

def processes?
  !!@processes
end

#run ⇒ Object 



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# File 'lib/metrix/cli.rb', line 21

def run
  opts.parse(@args)
  Metrix.logger.level = log_level
  if self.reporter.nil?
    puts "ERROR: at least one reporter must be specified"
    abort opts.to_s
  end
  cnt = -1
  started = Time.now
  while true
    begin
      cnt += 1
      now = Time.now.utc
      reporter << Metrix::ElasticSearch.new(elastic_search_status)  if elastic_search?
      reporter << Metrix::Mongodb.new(mongodb_status)               if mongodb?
      reporter << Metrix::Nginx.new(nginx_status)                   if nginx?
      if system?
        reporter << Metrix::System.new(File.read("/proc/stat"))
        reporter << Metrix::Load.new(File.read("/proc/loadavg"))
      end

      if processes?
        Metrix::Process.all.each do |m|
          reporter << m
        end
      end
      reporter.flush
    rescue SystemExit
      exit
    rescue => err
      Metrix.logger.error "#{err.message}"
      Metrix.logger.error "#{err.backtrace.inspect}"
    ensure
      sleep_for = @interval - (Time.now - started - cnt * interval)
      if sleep_for > 0
        Metrix.logger.info "finished run in %.06f, sleeping for %.06f" % [Time.now - now, sleep_for]
        sleep sleep_for
      else
        Metrix.logger.info "not sleeping because %.06f is negative" % [sleep_for]
      end
    end
  end
end

#system? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/metrix/cli.rb', line 100

def system?
  !!@system
end