Puppet, package-file-service

I'm still bit confused how puppet works but still I got it to work somehow. My home assignment was to install two demons with package-file-service technique, which means that Puppet first checks that the package is installed, then service turns it on and lastly copies demon settings from template located somewhere and after that "kicks" the demon that settings has been changed.

I had already done the apache2 so I mainly followed the script written in the class. I started by creating folders for sshd module, located in /etc/puppet/modules/

First I created main module folder named sshd and then two directories under sshd folder:

$ mkdir sshd; cd sshd
$ mkdir manifests/ templates/

Then I updated repositories and installed openssh-server

$ sudo apt-get update && sudo apt-get -y install openssh-server

After that I copied the sshd_config file to sshd/templates/sshd_config.erb

$ cp /etc/ssh/sshd_config templates/

Rename copied file to .erb and go to the manifests folder. There create new manifest

$ nano init.pp

Text to init.pp:

class sshd {

package { 'openssh-server':
ensure => installed,
}

service {'ssh':
ensure => running,
require => Package["openssh-server"],
}

file {'/etc/ssh/sshd_config':
ensure => file,
content => template ("/etc/puppet/modules/sshd/templates/sshd_config.erb"),
require => Package["openssh-server"],
notify => Service["ssh"],
}
}

# In this case the template path should be sshd/sshd_config.erb

Notify that my template file is in /etc/puppet/modules/sshd/templates/sshd_config.erb
And to run the module:

$ sudo puppet apply -e "include sshd"

This seems to work.

Then the apache2 module:

Same folder hierarchy for apache2, under main folder manifests folder and templates if wanted.

In the init.pp

class apache2 {

package { 'apache2':
ensure => installed,
}

service {'apache2':
ensure => running,
require => Package["apache2"],
}

file { '/var/www/testsite':
ensure => directory,
mode => 644,
require => Package["apache2"],
notify => Service["apache2"],
}
}

I had already installed apache2 so I turned it off

$ sudo service apache2 stop

And run my apache2 module:

$ sudo puppet apply -e "include apache2"

As we can see apache2 is not running in the center and after I run the module apache2 is running.

And now to combine the two modules together:

$ sudo puppet apply -e "include apache2, sshd"

Test scenario if this is working:

$ sudo service apache2 stop
$ sudo service ssh top

And if we want to see what happened:

$ sudo service apache2 status / ssh status

And after the puppet run we can see it changed both services to run

Worked. And to see how the directory hierarchy is set I installed "tree"

$ sudo apt-get install tree

headed to modules folder and

$ tree

This post was home assignment for Puppet course: http://terokarvinen.com/