Theoretically that's the way to do it in Puppet, but as other people point out it would be much simpler to block things from being installed in the first place. "ensure => purged" might get you better results from providers that handle dependencies, however I have mixed results with yum when doing this. The problem with ensure => absent with dependency driven package providers is it won't be able to figure out which order to uninstall them. Lastly, any time the OS provider changes the dependencies in one of your white listed packages you have to go and re-check your list, so I'd really concentrate on stopping any extra software being installed in the first place - save yourself the management nightmare.

On 02/05/12 06:42, Jörgen Maas wrote:
On Tue, May 1, 2012 at 10:38 PM, bainar <andrew.r.b...@gmail.com <mailto:andrew.r.b...@gmail.com>> wrote:

    Can anyone tell me if it is possible to explicitly specify the only
    allowed packages on a host (modules on a node?) - i.e. a white list?
    This is for hardening a VPS in the cloud.


Shouldn't it work using a resource default, something like:

Package {
 ensure => absent,
}

$whitelist = ["foo", "bar", "baz"]

package { $whitelist:
 ensure => present,
}


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Grtz,
Jörgen Maas
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