haproxy

HAProxy RubyGem

This gem aims to provide an interface to query HAProxy for statistics, and eventually management through the sockets API.

What's HAProxy?

HAProxy is the Reliable, High Performance TCP/HTTP Load Balancer.

Why this gem?

• I use HAProxy at my work.
• I wanted to know how to create gems.
• I wanted to contribute with OSS.
• Why not?
• All of the above.

Example of use

#! /usr/bin/env ruby
require 'haproxy'
require 'pp'

haproxy = HAProxy.read_stats '/path/to/haproxy.stats.socket'

pp haproxy.info

# {:name=>"HAProxy",
#  :version=>"1.3.22",
#  :release_date=>"2009/10/14",
#  :nbproc=>"1",
#  :process_num=>"1",
#  :pid=>"10222",
#  :uptime=>"0d 0h33m12s",
#  :uptime_sec=>"1992",
#  :memmax_mb=>"0",
#  :ulimit_n=>"4013",
#  :maxsock=>"4013",
#  :maxconn=>"2000",
#  :maxpipes=>"0",
#  :currconns=>"1",
#  :pipesused=>"0",
#  :pipesfree=>"0",
#  :tasks=>"1",
#  :run_queue=>"1",
#  :node=>"roke",
#  :"description:"=>nil}

pp haproxy.stats

# [{:pxname=>"app1",
#   :svname=>"thin1",
#   :qcur=>"0",
#   :qmax=>"0",
#   :scur=>"0",
#   :smax=>"0",
#   :slim=>"",
#   :stot=>"0",
#   :bin=>"0",
#   :bout=>"0",
#   :dreq=>"",
#   :dresp=>"0",
#   :ereq=>"",
#   :econ=>"0",
#   :eresp=>"0",
#   :wretr=>"0",
#   :wredis=>"0",
#   :status=>"no check",
#   :weight=>"1",
#   :act=>"1",
#   :bck=>"0",
#   :chkfail=>"",
#   :chkdown=>"",
#   :lastchg=>"",
#   :downtime=>"",
#   :qlimit=>"",
#   :pid=>"1",
#   :iid=>"1",
#   :sid=>"1",
#   :throttle=>"",
#   :lbtot=>"0",
#   :tracked=>"",
#   :type=>"2",
#   :rate=>"0",
#   :rate_lim=>"",
#   :rate_max=>"0"},...]

HAProxy sample configuration

global
	stats socket haproxy

defaults
	mode	http
	option httplog
  option httpclose
	retries	3
	option redispatch
	maxconn	2000
	contimeout	5000
	clitimeout	50000
	srvtimeout	50000
  stats uri /haproxy

listen app1 0.0.0.0:10000
	balance	roundrobin

  server thin1 127.0.0.1:10001
  server thin1 127.0.0.1:10002
  server thin1 127.0.0.1:10003
  server thin1 127.0.0.1:10004
  server thin1 127.0.0.1:10005

frontend app2
  bind 0.0.0.0:10011
  default_backend app2

backend app2
  balance roundrobin
  server thin1 127.0.0.1:10006
  server thin1 127.0.0.1:10007
  server thin1 127.0.0.1:10008
  server thin1 127.0.0.1:10009
  server thin1 127.0.0.1:10010

Roadmap

• Improve documentation
• Improve CSV parsing
• Add tests
• Add examples
• Read stats from HTTP and CSV files