Ruby Worker
The Ruby Worker sends JSON wrapped data via UDP packets to a given host at a defined interval.
Installation
$ gem install healthety
Usage
require "healthety"
Healthety.workers do
host "localhost"
port 41234
worker :load_average do
interval 0.5
# Gets load average with a system call (Mac OS X)
value `w | head -n1 | cut -f4 -d":" | cut -f2 -d" "`.to_f
end
worker :random do
interval 2
value rand(10)
end
endThat's all you need to do to define two different workers.
Defining helpers
If you want to define some helper methods create a new module first. Note the helpers method at the end to include your module into the workers. In this case a new file called connection_helper.rb contains the MySQL connection handling.
require "mysql2"
module Healthety
module ConnectionHelper
def mysql
@client ||= Mysql2::Client.new(:host => "localhost", :username => "root")
end
end
helpers ConnectionHelper
endIn your workers you can now use the helper method. Since the MySQL connection gets saved into a class instance variable the connection gets established only once.
$:.unshift File.dirname(__FILE__)
require "healthety"
require "connection_helper"
Healthety.workers do
host "localhost"
port 41234
worker :user_count do
interval 5
value mysql.query("SELECT COUNT(*) AS count FROM users").first["count"]
end
end