Puppet - Postfix - How-To edit generic.db

[Brian Dunbar]

New-ish to Puppet.  I'm just getting beyond the basics, now.

Got a postfix module defined.  But there is a wrinkle: the server needs to send mail from root as ro...@domain.com not ro...@hostname.domain.com

Because our service desk accepts tickets from servers BUT the counts as 'spam' anything NOT from domain.com.

This is easy with postfix:

edit /etc/postfix/generic - add "ro...@hostname.domain.com host...@domain.com"

$ postmap /etc/postfix/generic

restart service postfix

How do I tell puppet do this?

[Tim Mooney]

In regard to: [Puppet Users] Puppet - Postfix - How-To edit generic.db,...:

> New-ish to Puppet. I'm just getting beyond the basics, now.
>
> Got a postfix module defined. But there is a wrinkle: the server needs to
> send mail from root as ro...@domain.com not ro...@hostname.domain.com

So the big question is whether this config needs to be applied to *all*
the systems where you might run postfix, or whether it's specific to
one particular system or set of systems.

> Because our service desk accepts tickets from servers BUT the counts as
> 'spam' anything NOT from domain.com.
>
> This is easy with postfix:
>
> edit /etc/postfix/generic - add "ro...@hostname.domain.com
> host...@domain.com"

You need to modify a file, so you'll want to have a file resource
defined somewhere. Are there other settings in that file you typically
customize? If so, you may want the source for the file to be a
template(). If not, there are other ways you might handle it.

So, the file resource is going to look something like

file { '/etc/postfix/generic':
ensure => file,
owner => 'some_user',
group => 'some_group',
mode => '0somethingsomethingsomething',
source => yet_to_be_determined,
notify => Exec['postmap-generic'],
}

The real question is what goes in the "yet_to_be_determined" area for
the source. It could be a template

source => template('postfix/generic.erb'),

or perhaps it's a list of files (first one that matches is used):

source => [
"puppet:///modules/postfix/generic.${::fqdn}",
'puppet:///modules/postfix/generic',
],

Determining how you pick the source for the file is going to be the
most difficult part of this, and it depends on how much customization
you need to do.

> $ postmap /etc/postfix/generic

For that, you need an exec resource to execute your command after the file
is modified:

exec { 'postmap-generic':
cwd => '/etc/postfix',
path => '/bin:/usr/bin:/sbin:/usr/sbin',
command => 'postmap generic',
refreshonly => true,
notify => Service['postfix'],
}

> restart service postfix

service { 'postfix':
ensure => running,
enable => true,
}

Tim
--
Tim Mooney Tim.M...@ndsu.edu
Enterprise Computing & Infrastructure 701-231-1076 (Voice)
Room 242-J6, IACC Building 701-231-8541 (Fax)
North Dakota State University, Fargo, ND 58105-5164