Softpanorama

Home Switchboard Unix Administration Red Hat TCP/IP Networks Neoliberalism Toxic Managers
May the source be with you, but remember the KISS principle ;-)

Cobbler

Cobbler is a Linux installation server that allows for fast setup of network installation environments. It glues together and automates many associated Linux tasks so you do not have to hop between lots of various commands and applications when rolling out new systems, and, in some cases, changing existing ones.

It manages provisioning using a tiered concept of Distributions, Profiles, Systems, and Repositories.

Cobbler can be configured for PXE, reinstallations, and virtualized guests using Xen, KVM or VMware. Cobbler interacts with a program called Koan for reinstallation and virtualization support. Koan and Cobbler use libvirt to integrate with different virtualization software.

 
License GNU GPL v2

Features include:

Cobbler RPMs are availble via the Fedora EPEL repository. 
$ sudo rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-X-Y.noarch.rpm

Be sure to use the most recent X.Y version of the epel-release package.

Once that is complete, simply use the yum command to install the cobbler package:

$ sudo yum install cobbler

Once cobbler is installed, start and enable the service:

$ service cobblerd start
$ chkconfig cobblerd on

And (re)start/enable Apache:

$ service httpd start
$ service cobblerd on
Top Visited
Switchboard
Latest
Past week
Past month

NEWS CONTENTS

Old News ;-)

[Sep 30, 2015] Cobbler 2.6.10 Released by Jörgen

[Aug 05, 2011] CobblerTriggers – cobbler

Last modified 4 years ago Last modified on 08/05/11 15:09:45

Cobbler triggers provide a way to tie user-defined actions to certain cobbler commands -- for instance, to provide additional logging, integration with apps like Puppet or cfengine, set up SSH keys, tieing in with a DNS server configuration script, or for some other purpose.

Cobbler Triggers can be scripts written in the CobblerApi but do not have to be. They can either be executable programs that live in /var/lib/cobbler/triggers (and subdirectories thereof) or Python scripts in /usr/lib/python2.X/site-packages/cobbler/modules. The modules are preferred because they are faster and have access to Cobbler's native Python API handle, while the script triggers have to open up a new Python API handle and can therefore be exceedingly slow.

As a general rule, if you need access to Cobbler's object data from a trigger, you need to write the trigger as a module. Also never invoke cobbler from a trigger, or use Cobbler XMLRPC from a trigger. Essentially, cobbler triggers can be thought of as plugins into cobbler, though they are not essentially plugins per se.

Trigger Names (for Old-Style Triggers)

Cobbler script-based triggers are scripts installed in the following locations, and must be made chmod +x.

/var/lib/cobbler/triggers/add/system/pre/*
/var/lib/cobbler/triggers/add/system/post/*
/var/lib/cobbler/triggers/add/profile/pre/*
/var/lib/cobbler/triggers/add/profile/post/*
/var/lib/cobbler/triggers/add/distro/pre/*
/var/lib/cobbler/triggers/add/distro/post/*
/var/lib/cobbler/triggers/add/repo/pre/*
/var/lib/cobbler/triggers/add/repo/post/*
/var/lib/cobbler/triggers/sync/pre/*
/var/lib/cobbler/triggers/sync/post/*
/var/lib/cobbler/triggers/install/pre/*
/var/lib/cobbler/triggers/install/post/*

And the same as the above replacing "add" with "remove".

Pre-triggers are capable of failing an operation if they return anything other than 0. They are to be thought of as "validation" filters. Post-triggers cannot fail an operation and are to be thought of notifications.

We may add additional types as time goes on.

Pure Python Triggers

As mentioned earlier, triggers can be written in pure python, and many of these kinds of triggers ship with cobbler as stock. Look in your site-packages/cobbler/modules directory and cat "install_post_report.py" for an example trigger that sends email when a system gets done installing.

Notice how the trigger has a register method with a path that matches with the shell patterns above. That's how we know what type each trigger is.

You will see the path used in the trigger corresponds with the path where it would exist if it was a script -- this is how we know what type of trigger the module is providing.

The Simplest Trigger Possible

create /var/lib/cobbler/triggers/add/system/post/test.sh chmod +x the file

#!/bin/bash
echo "Hi, my name is $1 and I'm a newly added system"

However that's not very interesting as all you get are the names passed across. For triggers to be the most powerful, they should take advantage of the Cobbler API -- which means writing them as a Python module.

... ... ...

See Also

CobblerApi

And this post by Ithiriel: ​Writing Install Triggers

Recommended Links

Google matched content

Softpanorama Recommended

Top articles

Sites

Top articles

Sites



Etc

Society

Groupthink : Two Party System as Polyarchy : Corruption of Regulators : Bureaucracies : Understanding Micromanagers and Control Freaks : Toxic Managers :   Harvard Mafia : Diplomatic Communication : Surviving a Bad Performance Review : Insufficient Retirement Funds as Immanent Problem of Neoliberal Regime : PseudoScience : Who Rules America : Neoliberalism  : The Iron Law of Oligarchy : Libertarian Philosophy

Quotes

War and Peace : Skeptical Finance : John Kenneth Galbraith :Talleyrand : Oscar Wilde : Otto Von Bismarck : Keynes : George Carlin : Skeptics : Propaganda  : SE quotes : Language Design and Programming Quotes : Random IT-related quotesSomerset Maugham : Marcus Aurelius : Kurt Vonnegut : Eric Hoffer : Winston Churchill : Napoleon Bonaparte : Ambrose BierceBernard Shaw : Mark Twain Quotes

Bulletin:

Vol 25, No.12 (December, 2013) Rational Fools vs. Efficient Crooks The efficient markets hypothesis : Political Skeptic Bulletin, 2013 : Unemployment Bulletin, 2010 :  Vol 23, No.10 (October, 2011) An observation about corporate security departments : Slightly Skeptical Euromaydan Chronicles, June 2014 : Greenspan legacy bulletin, 2008 : Vol 25, No.10 (October, 2013) Cryptolocker Trojan (Win32/Crilock.A) : Vol 25, No.08 (August, 2013) Cloud providers as intelligence collection hubs : Financial Humor Bulletin, 2010 : Inequality Bulletin, 2009 : Financial Humor Bulletin, 2008 : Copyleft Problems Bulletin, 2004 : Financial Humor Bulletin, 2011 : Energy Bulletin, 2010 : Malware Protection Bulletin, 2010 : Vol 26, No.1 (January, 2013) Object-Oriented Cult : Political Skeptic Bulletin, 2011 : Vol 23, No.11 (November, 2011) Softpanorama classification of sysadmin horror stories : Vol 25, No.05 (May, 2013) Corporate bullshit as a communication method  : Vol 25, No.06 (June, 2013) A Note on the Relationship of Brooks Law and Conway Law

History:

Fifty glorious years (1950-2000): the triumph of the US computer engineering : Donald Knuth : TAoCP and its Influence of Computer Science : Richard Stallman : Linus Torvalds  : Larry Wall  : John K. Ousterhout : CTSS : Multix OS Unix History : Unix shell history : VI editor : History of pipes concept : Solaris : MS DOSProgramming Languages History : PL/1 : Simula 67 : C : History of GCC developmentScripting Languages : Perl history   : OS History : Mail : DNS : SSH : CPU Instruction Sets : SPARC systems 1987-2006 : Norton Commander : Norton Utilities : Norton Ghost : Frontpage history : Malware Defense History : GNU Screen : OSS early history

Classic books:

The Peter Principle : Parkinson Law : 1984 : The Mythical Man-MonthHow to Solve It by George Polya : The Art of Computer Programming : The Elements of Programming Style : The Unix Hater’s Handbook : The Jargon file : The True Believer : Programming Pearls : The Good Soldier Svejk : The Power Elite

Most popular humor pages:

Manifest of the Softpanorama IT Slacker Society : Ten Commandments of the IT Slackers Society : Computer Humor Collection : BSD Logo Story : The Cuckoo's Egg : IT Slang : C++ Humor : ARE YOU A BBS ADDICT? : The Perl Purity Test : Object oriented programmers of all nations : Financial Humor : Financial Humor Bulletin, 2008 : Financial Humor Bulletin, 2010 : The Most Comprehensive Collection of Editor-related Humor : Programming Language Humor : Goldman Sachs related humor : Greenspan humor : C Humor : Scripting Humor : Real Programmers Humor : Web Humor : GPL-related Humor : OFM Humor : Politically Incorrect Humor : IDS Humor : "Linux Sucks" Humor : Russian Musical Humor : Best Russian Programmer Humor : Microsoft plans to buy Catholic Church : Richard Stallman Related Humor : Admin Humor : Perl-related Humor : Linus Torvalds Related humor : PseudoScience Related Humor : Networking Humor : Shell Humor : Financial Humor Bulletin, 2011 : Financial Humor Bulletin, 2012 : Financial Humor Bulletin, 2013 : Java Humor : Software Engineering Humor : Sun Solaris Related Humor : Education Humor : IBM Humor : Assembler-related Humor : VIM Humor : Computer Viruses Humor : Bright tomorrow is rescheduled to a day after tomorrow : Classic Computer Humor

The Last but not Least


Copyright © 1996-2018 by Dr. Nikolai Bezroukov. www.softpanorama.org was initially created as a service to the (now defunct) UN Sustainable Development Networking Programme (SDNP) in the author free time and without any remuneration. This document is an industrial compilation designed and created exclusively for educational use and is distributed under the Softpanorama Content License. Original materials copyright belong to respective owners. Quotes are made for educational purposes only in compliance with the fair use doctrine.

 

FAIR USE NOTICE This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available to advance understanding of computer science, IT technology, economic, scientific, and social issues. We believe this constitutes a 'fair use' of any such copyrighted material as provided by section 107 of the US Copyright Law according to which such material can be distributed without profit exclusively for research and educational purposes.

This is a Spartan WHYFF (We Help You For Free) site written by people for whom English is not a native language. Grammar and spelling errors should be expected. The site contain some broken links as it develops like a living tree...

You can use PayPal to make a contribution, supporting development of this site and speed up access. In case softpanorama.org is down you can use the at softpanorama.info

Disclaimer:

The statements, views and opinions presented on this web page are those of the author (or referenced source) and are not endorsed by, nor do they necessarily reflect, the opinions of the author present and former employers, SDNP or any other organization the author may be associated with. We do not warrant the correctness of the information provided or its fitness for any purpose.

The site uses AdSense so you need to be aware of Google privacy policy. You you do not want to be tracked by Google please disable Javascript for this site. This site is perfectly usable without Javascript.

Last modified: September, 12, 2017