CODEWITHSUNDEEP
puppet
Red Cricket
Red Cricket

Reputation: 10460

How Affect Resource Type Declared In Another Puppet Module

I include the class nova::compute::libvirt and this class defines a Package resource like so:

package { 'libvirt-nwfilter':
  ensure => present,
  name   => $::nova::params::libvirt_nwfilter_package_name,
  before => Service['libvirt'],
  tag    => ['openstack', 'nova-support-package'],
}

The problem is that the RPM is in a YUM repo that is not enabled enabled=0. I could solve this issue by changing nova::conpute::libvirt so that Package resource looked like this:

package { 'libvirt-nwfilter':
  ensure => present,
  name   => $::nova::params::libvirt_nwfilter_package_name,
  before => Service['libvirt'],
  tag    => ['openstack', 'nova-support-package'],
  install_options => ['--enablerepo', 'redhat_updates'],
}

But I'd like to not have to modified a module I got from puppet forge because the next time someone else setups up a puppet master they might forget to make the modification. Is there something I can do from the class that includes nova::compute::libvirt?

Upvotes: 1

Views: 176

Answers (2)

John Bollinger
John Bollinger

Reputation: 180093

Resource collectors afford the possibility of overriding attributes of resources declared elsewhere. The syntax would be:

Package<| title == 'libvirt-nwfilter' |> {
    install_options => ['--enablerepo', 'redhat_updates']
}

That alternative avoids modifying the repository definition, and it does not require introducing any new ordering relationships. Beware, however, that collectors always realize any matching virtual resources. Beware also that this approach is very powerful, and thus very easy to abuse to get yourself in trouble. With great power comes great responsibility.

Upvotes: 1

Matthew Schuchard
Matthew Schuchard

Reputation: 28739

You can solve this problem by enabling the redhat_updates yum repo with a yumrepo resource, and then specifying a metaparameter for it to be applied before the class.

yumrepo { "redhat_updates":
  baseurl  => "baseurl",
  descr    => "Redhat Updates",
  enabled  => 1,
  gpgcheck => 0,
  before   => Class['nova::compute::libvirt'],
}

https://docs.puppet.com/puppet/latest/types/yumrepo.html

Upvotes: 1

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