class Riemann::Tools::Varnish

Public Class Methods

new() click to toggle source
Calls superclass method Riemann::Tools::new
# 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

Public Instance Methods

tick() click to toggle source
# 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