On 14/04/11 06:26, Giovanni Bordello wrote:
> I wonder if there is an easy way to change variables in the standard
> linux config files in /etc/sysconfig/* on RHEL or /etc/defaults/* on
> Debian.
>
> For instance I would like to set the host name in /etc/sysconfig/network
> with something like:
>
> configoption { "/etc/sysconfig/network":
> option => "HOSTNAME",
> value => "host.example.com",
> ensure => exact, # or "includes" or "remove" or "commentout"
> }
>
> Is there an easy way to do that? Or should I invent the wheel?
Check out the Augeas project and associated Puppet type. Here's a RHEL
example, though similar things should work with /etc/default/ on Debian:
augeas { "nisdomain":
context => "/files/etc/sysconfig/network",
changes => "set NISDOMAIN example.net",
}
To remove it:
changes => "rm NISDOMAIN",
Commenting out is tricky though.. perhaps you could use 'mv' when it
arrives, but that doesn't completely solve the problem.
Here are a few resources:
http://projects.puppetlabs.com/projects/1/wiki/Puppet_Augeas
http://docs.puppetlabs.com/references/latest/type.html#augeas
http://augeas.net/tour.html
http://r.pinson.free.fr/augeas/augeas-book.pdf
The best way to learn Augeas and how to modify the tree is to explore
using the augtool command.
There are also a few recipes for changing individual lines in files on
the Puppet wiki:
http://projects.puppetlabs.com/projects/1/wiki/Simple_Text_Patterns
Both solutions could be wrapped up in a define() to give you an
interface similar to the one you want.
--
Dominic Cleal
Red Hat Consulting
m: +44 (0)7818 512168
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