Home / server / Questions / 686126
Accepted
daks
Asked: 2015-04-29 04:12:11 +0800 CST

puppet: execution ordering of classes 'instances'

  • 772

I know how I can use resource ordering in Puppet to order built-in types (user, group, cron...) or classes, but I wonder how I can make it for specific instances of classes.

For example, I use puppetlabs/apt module and the apt::source defined type to push wheezy/updates/... apt sources. My code looks like

apt::source { 'debian_wheezy':
    location        => 'http://ftp.debian.org/debian/',
    release         => 'wheezy',
    repos           => 'main contrib non-free',
    include_src     => false,
}
apt::source { 'debian_wheezy_updates':
    location        => 'http://ftp.debian.org/debian/',
    release         => 'wheezy-updates',
    repos           => 'main contrib non-free',
    include_src     => false,
}

I want to make use of another module to configure HAProxy, but I need to define another apt::source to configure wheezy backports because haproxy is not available on the standard wheezy repository. So I want to indicate that my haproxy class depends of my apt::source type defining wheezy backports.

I have tried something naive like

Class['apt::source'] -> Class['haproxy']

but logically this does not make sense: I want to specify one specific instance of apt::source.

Do anybody knows how I can do that?

thanks

debian

2 Answers

  1. Best Answer

    When you declare the haproxy class you can require it, e.g.: 

    class { 'haproxy':
  require => Apt::Source['debian_wheezy'],
}
    • 3

  2. You can put the relevant apt::source resource in it's own class. Example:

    myapt:

    require myapt::default
require myapt::backports

    myapt::default:

    apt::source { 'debian_wheezy':
    location        => 'http://ftp.debian.org/debian/',
    release         => 'wheezy',
    repos           => 'main contrib non-free',
    include_src     => false,
}
apt::source { 'debian_wheezy_updates':
    location        => 'http://ftp.debian.org/debian/',
    release         => 'wheezy-updates',
    repos           => 'main contrib non-free',
    include_src     => false,
}

    myapt::backports:

    apt::source { 'debian_wheezy_backports':
    location        => 'http://ftp.debian.org/debian/',
    release         => 'wheezy-backports',
    repos           => 'main contrib non-free',
    include_src     => false,
}

    myhaproxy:

    require myapt::backports
class { 'haproxy': }
    • 0