Module: Ruminate

Defined in:
lib/ruminate.rb,
lib/ruminate/railtie.rb

Defined Under Namespace

Classes: Railtie

Class Method Summary collapse

Class Method Details



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# File 'lib/ruminate.rb', line 73

def self.create_links(config_file, plugin_dir)
  config = YAML.load(File.read(config_file))
  munin_plugin_dir = config['munin_plugin_dir'] || '/etc/munin/plugins'
  full_plugin_dir = File.expand_path(plugin_dir)
  Dir["#{munin_plugin_dir}/*"].each do |plugin_file|
    next unless File.symlink?(plugin_file)
    dest = File.readlink(plugin_file)
    if File.dirname(dest).end_with?(plugin_dir)
      puts "Removing #{plugin_file}"
      FileUtils.rm_f(plugin_file)
    end
  end
  Dir["#{full_plugin_dir}/*"].each do |plugin_file|
    new_plugin_file = File.join(munin_plugin_dir, File.basename(plugin_file))
    puts "Creating link for #{new_plugin_file}"
    File.symlink(plugin_file, new_plugin_file)
  end
  #system '/etc/init.d/munin-node restart'
end

.create_plugins(config_file, ruminate_dir, plugin_dir) ⇒ Object 



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# File 'lib/ruminate.rb', line 7

def self.create_plugins(config_file, ruminate_dir, plugin_dir)
  FileUtils.mkdir_p(plugin_dir)
  config = YAML.load(File.read(config_file))
  ruminate_plugin = File.expand_path('../ruminate/plugin.rb', __FILE__)
  rumx_mount      = config['rumx_mount']   || ''
  username        = config['username']
  password        = config['password']
  host            = config['host']         || 'localhost'
  port            = config['port']         || 3000
  smtp_host       = config['smtp_host']    || 'localhost'
  ruby_shebang    = config['ruby_shebang'] || '/usr/bin/env ruby'

  Dir["#{ruminate_dir}/*.yml"].each do |plugin_config_file|
    plugin_basename = File.basename(plugin_config_file, '.*')
    plugin_config = YAML.load(File.read(plugin_config_file))
    replace_templates(plugin_config, ruminate_dir)
    plugin_config.each do |graph_category, graph_configs|
      graph_configs.each do |graph_config|
        raise "No plot\n#{graph_config.inspect}" unless graph_config[:plot]
        config_params = ''
        graph_config.each do |key, value|
          config_params += "#{key} #{value}\n" if key.to_s.start_with?('graph_')
        end
        config_params += "graph_category #{graph_category}\n" unless graph_config[:graph_category]
        graph_config[:plot].each_with_index do |field_hash, i|
          field_hash.each do |key, value|
            next if key == :field
            config_params += "field#{i}.#{key} #{value}\n"
          end
        end

        fields = graph_config[:plot].map {|field_hash| field_hash[:field]}
        query = graph_config[:query]
        alerts = graph_config[:alert] || []
        alerts.each do |alert|
          alert[:email] = config['email'][alert[:email]] if alert[:email].kind_of?(Symbol)
        end
        name = plugin_basename
        name += '_' + graph_config[:name] if graph_config[:name]
        puts "Creating #{name}"
        File.open(File.join(plugin_dir, name), 'w', 0755) do |f|
          f.write <<-EOS
#!#{ruby_shebang}

require '#{ruminate_plugin}'

ruminate(
  ARGV[0],
  '#{rumx_mount}',
  #{username && username.inspect},
  #{password && password.inspect},
  '#{host}',
  #{port},
  '#{smtp_host}',
  #{config_params.inspect},
  '#{query}',
  #{fields.inspect},
  #{alerts.inspect}
)
          EOS
        end
      end
    end
  end
end