Class: Munin::Command

Inherits:
Object
  • Object
show all
Defined in:
lib/munin/command.rb

Constant Summary collapse

PASSENGER_PLUGINS = 
%W{munin_passenger_memory_stats munin_passenger_queue munin_passenger_status}
RAILS_PLUGINS = 
%W{munin_rails_database_time munin_rails_request_duration munin_rails_request_error munin_rails_requests munin_rails_view_render_time}
PASSENGER_PLUGIN_CONFIG = 
"[<%= plugin_target_name %>]\nuser root\ncommand ruby %c\nenv.passenger_status passenger-status\nenv.passenger_memory_stats passenger-memory-stats\nenv.graph_category <%= graph_category %>\n"
RAILS_PLUGIN_CONFIG = 
"[<%= plugin_target_name %>]    \nenv.log_file <%= options[:log_file] %>\nuser root\ncommand ruby %c\nenv.request_log_analyzer request-log-analyzer\nenv.graph_category <%= graph_category %>\nenv.log_format rails3\n"
PASSENGER_CATEGORY = 
"Passenger"

Instance Method Summary collapse

Instance Method Details

#add_plugin(plugin_file, plugin_target_name = nil) ⇒ Object 



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# File 'lib/munin/command.rb', line 62

def add_plugin(plugin_file, plugin_target_name = nil)
  FileUtils.mkdir_p(munin_plugins_path)      

  plugin_source_path = File.join(munin_dir, plugin_file)
  plugin_target_path = File.join(munin_plugins_path, plugin_target_name || plugin_file)

  File.unlink plugin_target_path if File.symlink?(plugin_target_path)
  File.symlink plugin_source_path, plugin_target_path
end

#add_plugin_config(plugin_target_name, graph_category, config_template, options = {}) ⇒ Object 



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# File 'lib/munin/command.rb', line 54

def add_plugin_config(plugin_target_name, graph_category, config_template, options = {})
  FileUtils.mkdir_p(munin_plugin_config_path)      
  template = ERB.new config_template
  File.open(File.join(munin_plugin_config_path, plugin_target_name), "w+") do |file|
    file << template.result(binding)      
  end
end

#install_application(args) ⇒ Object 



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# File 'lib/munin/command.rb', line 37

def install_application(args)
  app_name = args.shift
  log_file = args.shift
  RAILS_PLUGINS.each do |plugin|
    plugin_target_name = [app_name, plugin].join("_")
    add_plugin(plugin, plugin_target_name)
    add_plugin_config(plugin_target_name, app_name, RAILS_PLUGIN_CONFIG, :log_file => log_file)
  end      
end

#install_passenger_plugins ⇒ Object 



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# File 'lib/munin/command.rb', line 47

def install_passenger_plugins
  PASSENGER_PLUGINS.each do |plugin|
    add_plugin(plugin, plugin)
    add_plugin_config(plugin, PASSENGER_CATEGORY, PASSENGER_PLUGIN_CONFIG)
  end
end

#munin_dir ⇒ Object 



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# File 'lib/munin/command.rb', line 80

def munin_dir
  File.join(File.dirname(__FILE__), "..", "..", "munin")
end

#munin_plugin_config_path ⇒ Object 



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# File 'lib/munin/command.rb', line 76

def munin_plugin_config_path
  "/etc/munin/plugin-conf.d"
end

#munin_plugins_path ⇒ Object 



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# File 'lib/munin/command.rb', line 72

def munin_plugins_path
  "/etc/munin/plugins"
end

#run(args) ⇒ Object 



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# File 'lib/munin/command.rb', line 5

def run(args)
  if args.first == "install"
    install_passenger_plugins
  elsif args.first == "add"
    args.shift
    install_application(args)
  end
end