Puppet & ubuntu & svn – part 1

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This blog entry is meant as a quick lookup on how to setup an intial puppet environment on linux.
The goal is to have puppet installed in a client master relationship, in which the master configuration files are stored in svn. The client is, except for the initial certificate trust, completely automated. In this part the focus is on the central server setup. As a base os for the central master ubuntu (11.04) is used.
Initial step is to install a machine with Ubuntu 11.04 in a regular way. If this is a new step, please use one of the available manuals found on the internet.
Installation of the required software can be done using the following apt command:
sudo apt-get install puppetmaster-passenger subversion
Once the packages and the dependencies are installed a local svn repository can be created with the command, we make a world accessible directory for the purpose of this manual, in realworld scenario’s a better subversion setup should be used:

sudo mkdir /subversion
sudo chmod 777 /subversion
svnadmin create /subversion

Now we have this repository we van import the default puppet configuration as a starting point.

cd /etc
sudo svn import puppet file://localhost/subversion

Make a copy of the current directory

cd /etc
sudo mv puppet puppet.old

And checkout the ‘latest’ version from svn

cd /etc
sudo svn checkout file://localhost/subversion/puppet

Now create a crontab entry like the one below to do an update of the tree every minute

* * * * * root cd /etc && svn checkout file://localhost/subversion/puppet > /dev/null 2>&1

As a regular user you can now checkout the same project at a convenient location e.g. your home directory.

cd ~
svn checkout file://localhost/subversion/puppet

The first thing(s) that have to be done is add some directories and change some configuration parameters in order for the installation to work. The steps involved are:

cd ~/puppet
for dir in files plugins templates ; do mkdir ${dir} ; done
svn add *
vi fileserver.conf

edit add a section called [modules]
Now we are ready commit our first version to the revision control

cd ~/puppet
svn commit -m "Putting directory structure in place"

To add the first recipe proceed with the following steps:

cd ~/puppet/manifests
vi site.pp
import "nodes"

File { backup => main }
filebucket { main: server => "puppet"; } # replace puppet with fqdn of the puppet server

vi nodes.pp
node 'default' {
include test

Add the files to svn

cd ~/puppet/manifests
svn add *

Create the first recipe called test

cd ~/puppet/modules
mkdir -p test/manifests
vi test/manifests/init.pp
class test {
warn { 'do something usefull' }
svn add test

And commit them all to the repository

cd ~/puppet
svn commit -m "first recipe for default nodes"

Within one minute the crontab will do a checkout of these changes and once a remote puppet client connects it will process the changed data.