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Ruby gem for interfacing with HAProxy
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README.md

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

License

Copyright (c) 2014 Leandro López

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
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