Class: Riemann::Tools::ApacheStatus

Inherits:
Object
  • Object
show all
Includes:
Riemann::Tools
Defined in:
lib/riemann/tools/apache_status.rb

Constant Summary

Constants included from Riemann::Tools

VERSION

Instance Attribute Summary

Attributes included from Riemann::Tools

#argv

Instance Method Summary collapse

Methods included from Riemann::Tools

#attributes, #endpoint_name, included, #options, #report, #riemann, #run

Constructor Details

#initialize ⇒ ApacheStatus

Returns a new instance of ApacheStatus.



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# File 'lib/riemann/tools/apache_status.rb', line 21

def initialize
  super

  @uri = URI.parse("#{opts[:uri]}?auto")
  # Sample Response with ExtendedStatus On
  # Total Accesses: 20643
  # Total kBytes: 36831
  # CPULoad: .0180314
  # Uptime: 43868
  # ReqPerSec: .470571
  # BytesPerSec: 859.737
  # BytesPerReq: 1827.01
  # BusyWorkers: 6
  # IdleWorkers: 94
  # Scoreboard: ___K_____K____________W_

  @scoreboard_map = {
    '_' => 'waiting',
    'S' => 'starting',
    'R' => 'reading',
    'W' => 'sending',
    'K' => 'keepalive',
    'D' => 'dns',
    'C' => 'closing',
    'L' => 'logging',
    'G' => 'graceful',
    'I' => 'idle',
    '.' => 'open',
  }
end

Instance Method Details

#connection ⇒ Object 



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# File 'lib/riemann/tools/apache_status.rb', line 73

def connection
  response = nil
  begin
    response = ::Net::HTTP.new(@uri.host, @uri.port).get(@uri, { 'user-agent' => opts[:user_agent] }).body
  rescue StandardError => e
    report(
      service: 'httpd health',
      state: 'critical',
      description: "Httpd connection error: #{e.class} - #{e.message}",
      tags: ['httpd'],
    )
  else
    report(
      service: 'httpd health',
      state: 'ok',
      description: 'Httpd connection status ok',
      tags: ['httpd'],
    )
  end
  response
end

#get_scoreboard_metrics(response) ⇒ Object 



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# File 'lib/riemann/tools/apache_status.rb', line 52

def get_scoreboard_metrics(response)
  results = Hash.new(0)

  response.slice! 'Scoreboard: '
  response.each_char do |char|
    results[char] += 1
  end
  results.transform_keys { |k| @scoreboard_map[k] }
end

#report_metrics(metrics) ⇒ Object 



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# File 'lib/riemann/tools/apache_status.rb', line 62

def report_metrics(metrics)
  metrics.each do |k, v|
    report(
      service: "httpd #{k}",
      metric: v.to_f,
      state: 'ok',
      tags: ['httpd'],
    )
  end
end

#tick ⇒ Object 



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# File 'lib/riemann/tools/apache_status.rb', line 95

def tick
  return if (response = connection).nil?

  response.each_line do |line|
    metrics = {}

    if line =~ /Scoreboard/
      metrics = get_scoreboard_metrics(line.strip)
    else
      key, value = line.strip.split(':')
      metrics[key.gsub(/\s/, '')] = value
    end
    report_metrics(metrics)
  end
end