Chef Metrics

Chef Metrics is an OpsCode Chef report/exception handler for sending Chef metrics to one or more endpoints. Metrics are gathered using run_status and node.run_state[:metrics] (optional). The method of metric delivery to the endpoint/s of choice is left up to the user. You can't manage what you don't measure.

Installation

gem install chef-metrics

Usage

Append the following to your Chef client configs, usually at /etc/chef/client.rb

  require "chef-metrics"

  metric_handler = ChefMetrics.new do
    # see examples below
  end

  report_handlers << metric_handler
  exception_handlers << metric_handler

Alternatively, you can use the Chef cookbook LWRP.

  chef_gem "chef-metrics"

  handler_path = File.join(node["chef_handler"]["handler_path"], "chef_metrics.rb")

  directory File.dirname(handler_path) do
    recursive true
  end

  file handler_path do
    content "require 'chef-metrics'"
  end

  action_block = Proc.new do
    # see examples below
  end

  chef_handler "ChefMetrics" do
    source handler_path
    arguments action_block
  end

Examples

The following examples are "action" blocks:

  metric_handler = ChefMetrics.new do
    # action block
  end

Note: I recommend adding logging, timeouts, and error handling to the following.

Graphite

  require 'socket'

  socket = TCPSocket.new(GRAPHITE_HOST, GRAPHITE_PORT)
  socket.write(graphite_formatted)
  socket.close

Sensu

  require 'socket'

  sensu_result = {
    :name => "chef_report",
    :type => "metric",
    :handler => "metrics",
    :output => graphite_formatted
  }

  socket = TCPSocket.open('127.0.0.1', 3030)
  socket.write(sensu_result.to_json)
  socket.close

More

  puts metrics
  # {:updated_resources=>12, :all_resources=>236, :elapsed_time=>22, :success=>1, :fail=>0}

  puts graphite_formatted
  # chef.i-424242.updated_resources 12
  # chef.i-424242.all_resources 236
  # ...

  self.metric_scheme = "#{node.environment}.chef.#{node.name.gsub(".", "_")}"
  puts graphite_formatted
  # production.chef.i-424242.updated_resources 12
  # production.chef.i-424242.all_resources 236
  # ...

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request