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Description:

haproxyadmin 0.2.4

A Python library to manage HAProxy via stats socket.

Contents

Introduction
Features
Installation
Release
Development
Licensing
Acknowledgement
Contacts

Introduction
haproxyadmin is a Python library for interacting with HAProxy
load balancer to perform operations such as enabling/disabling servers.
It does that by issuing the appropriate commands over the stats socket
provided by HAProxy. It also uses that stats socket for retrieving
statistics and changing settings.
HAProxy is a multi-process daemon and each process can only be accessed by a
distinct stats socket. There isn’t any shared memory for all these processes.
That means that if a frontend or backend is managed by more than one processes,
you have to find which stats socket you need to send the query/command.
This makes the life of a sysadmin a bit difficult as he has to keep track of
which stats socket to use for a given object(frontend/backend/server).
haproxyadmin resolves this problem by presenting objects as single entities
even when they are managed by multiple processes. It also supports aggregation
for various statistics provided by HAProxy. For instance, to report the
requests processed by a frontend it queries all processes which manage that
frontend and return the sum.
The library works with Python 2.7 and Python 3.6, but for development and
testing Python 3.6 is used. The Six Python 2 and 3 Compatibility Library
is being used to provide the necessary wrapping over the differences between
these 2 major versions of Python.
>>> from haproxyadmin import haproxy
>>> hap = haproxy.HAProxy(socket_dir='/run/haproxy')
>>> frontends = hap.frontends()
>>> for frontend in frontends:
... print(frontend.name, frontend.requests, frontend.process_nb)
...
frontend_proc2 0 [2]
haproxy 0 [4, 3, 2, 1]
frontend_proc1 0 [1]
frontend1_proc34 0 [4, 3]
frontend2_proc34 0 [4, 3]
>>>
>>>
>>> backends = hap.backends()
>>> for backend in backends:
... print(backend.name, backend.requests, backend.process_nb)
... servers = backend.servers()
... for server in servers:
... print(" ", server.name, server.requests)
...
backend_proc2 100 [2]
bck_proc2_srv4_proc2 25
bck_proc2_srv3_proc2 25
bck_proc2_srv1_proc2 25
bck_proc2_srv2_proc2 25
haproxy 0 [4, 3, 2, 1]
backend1_proc34 16 [4, 3]
bck1_proc34_srv1 6
bck_all_srv1 5
bck1_proc34_srv2 5
backend_proc1 29 [1]
member2_proc1 14
member1_proc1 15
bck_all_srv1 0
backend2_proc34 100 [4, 3]
bck2_proc34_srv2 97
bck2_proc34_srv1 2
bck_all_srv1 1
>>>
The documentation of the library is available at http://haproxyadmin.readthedocs.org

Features

HAProxy in multi-process mode (nbproc >1)
UNIX stats socket, no support for querying HTTP statistics page
Frontend operations
Backend operations
Server operations
ACL operations
MAP operations
Aggregation on various statistics
Change global options for HAProxy

Installation
Use pip:
pip install haproxyadmin
From Source:
sudo python setup.py install
Build (source) RPMs:
python setup.py clean --all; python setup.py bdist_rpm
Build a source archive for manual installation:
python setup.py sdist

Release

Bump versions in docs/source/conf.py and haproxyadmin/__init__.py
Commit above change with:
git commit -av -m'RELEASE 0.1.3 version'

Create a signed tag, pbr will use this for the version number:
git tag -s 0.1.3 -m 'bump release'

Create the source distribution archive (the archive will be placed in the dist directory):
python setup.py sdist

pbr will update ChangeLog file and we want to squeeze them to the previous commit thus we run:
git commit -av --amend

Move current tag to the last commit:
git tag -fs 0.1.3 -m 'bump release'

Push changes:
git push;git push --tags

Development
I would love to hear what other people think about haproxyadmin and provide
feedback. Please post your comments, bug reports, wishes on my issues page.

Licensing
Apache 2.0

Acknowledgement
This program was originally developed for Booking.com. With approval
from Booking.com, the code was generalised and published as Open Source
on github, for which the author would like to express his gratitude.

Contacts
Project website: https://github.com/unixsurfer/haproxyadmin
Author: Pavlos Parissis <pavlos.parissis@gmail.com>