DevOps: Puppet, Docker, and Kubernetes

Installing a package before starting a service

To show how ordering works, we'll create a manifest that installs httpd and then ensures the httpd package service is running.

How to do it...

1. We start by creating a manifest that defines the service:

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

2. The service definition references a package resource named httpd; we now need to define that resource:

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

How it works...

In this example, the package will be installed before the service is started. Using require within the definition of the httpd service ensures that the package is installed first, regardless of the order within the manifest file.

Capitalization

Capitalization is important in Puppet. ...