Class: Riemann::Tools::Varnish

Inherits:
Object
  • Object
show all
Includes:
Riemann::Tools
Defined in:
lib/riemann/tools/varnish.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 ⇒ Varnish

Returns a new instance of Varnish.



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# File 'lib/riemann/tools/varnish.rb', line 14

def initialize
  super

  cmd = 'varnishstat -V'
  Open3.popen3(cmd) do |_stdin, _stdout, stderr, _wait_thr|
    @ver = /varnishstat \(varnish-(\d+)/.match(stderr.read)[1].to_i
  end

  @vstats = if @ver >= 4
              ['MAIN.sess_conn',
               'MAIN.sess_drop ',
               'MAIN.client_req',
               'MAIN.cache_hit',
               'MAIN.cache_miss',]
            else
              %w[client_conn
                 client_drop
                 client_req
                 cache_hit
                 cache_miss]
            end
end

Instance Method Details

#tick ⇒ Object 



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# File 'lib/riemann/tools/varnish.rb', line 37

def tick
  stats = if @ver >= 4
            `varnishstat -1 -f #{@vstats.join(' -f ')}`
          else
            `varnishstat -1 -f #{@vstats.join(',')}`
          end
  stats.each_line do |stat|
    m = stat.split
    report(
      host: opts[:varnish_host].dup,
      service: "varnish #{m[0]}",
      metric: m[1].to_f,
      state: 'ok',
      description: m[3..].join(' ').to_s,
      tags: ['varnish'],
    )
  end
end