Class: Bipbip::Plugin::FastcgiPhpOpcache

Inherits:
Bipbip::Plugin show all
Defined in:
lib/bipbip/plugin/fastcgi_php_opcache.rb

Instance Attribute Summary

Attributes inherited from Bipbip::Plugin

#config, #frequency, #metric_group, #name, #tags

Instance Method Summary collapse

Methods inherited from Bipbip::Plugin

factory, factory_from_plugin, #initialize, #metrics_names, #run, #source_identifier

Methods included from InterruptibleSleep

#interrupt_sleep, #interruptible_sleep

Constructor Details

This class inherits a constructor from Bipbip::Plugin

Instance Method Details

#metrics_schema ⇒ Object 



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# File 'lib/bipbip/plugin/fastcgi_php_opcache.rb', line 3

def metrics_schema
  [
    { name: 'free_memory', type: 'gauge', unit: 'b' },
    { name: 'current_wasted_percentage', type: 'gauge', unit: '%' },
    { name: 'num_cached_keys', type: 'gauge', unit: 'Keys' },
    { name: 'hit_rate', type: 'gauge', unit: '%' },
    { name: 'misses', type: 'counter', unit: 'Misses' },
    { name: 'hits', type: 'counter', unit: 'Hits' },
    { name: 'oom_restarts', type: 'counter', unit: 'Restarts' }
  ]
end

#monitor ⇒ Object 



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# File 'lib/bipbip/plugin/fastcgi_php_opcache.rb', line 15

def monitor
  authority = config['host'].to_s + ':' + config['port'].to_s
  path = File.join(Bipbip::Helper.data_path, 'php-opcache-status.php')

  env_backup = ENV.to_hash
  ENV['REQUEST_METHOD'] = 'GET'
  ENV['SCRIPT_NAME'] = File.basename(path)
  ENV['SCRIPT_FILENAME'] = path
  response = `cgi-fcgi -bind -connect #{authority.shellescape} 2>&1`
  ENV.replace(env_backup)

  body = response.split(/\r?\n\r?\n/)[1]
  raise "FastCGI response has no body: #{response}" unless body
  stats = JSON.parse(body)
  raise "FastCGI response has no stats (opcache disabled?): #{stats.inspect}" unless stats

  @data_previous ||= stats

  stats_memory = stats['memory_usage']
  stats_statistics = stats['opcache_statistics']
  hit_rate = hit_rate(stats)

  @data_previous = stats
  {
    free_memory: stats_memory['free_memory'].to_i,
    current_wasted_percentage: stats_memory['current_wasted_percentage'].to_i,
    num_cached_keys: stats_statistics['num_cached_keys'].to_i,
    hit_rate: hit_rate,
    misses: stats_statistics['misses'].to_i,
    hits: stats_statistics['hits'].to_i,
    oom_restarts: stats_statistics['oom_restarts'].to_i
  }
end