Puppet users - Feb 2010 - Augeas type: Removing an entry from /etc/hosts

Hi all,

I''m just starting to look at using Augeas with Puppet to manage some of
our configuration files. I thought I would start with a simple task of
removing an entry from the /etc/hosts file. I''m not finding it simple
though!

We have a number of hosts with entries in the /etc/hosts file like this:

127.0.1.1	hostname

We would like to remove these lines. Now I know this can be done with a
simple exec of sed but if possible I would like to use it as a good test
exercise with Augeas. Now, it''s pretty easy to do this with augtool, as
follows:

root@miscreant:/home/pre500# augtool
augtool> match /files/etc/hosts/*/ipaddr 127.0.1.1
/files/etc/hosts/4/ipaddr
augtool> rm /files/etc/hosts/4
rm : /files/etc/hosts/4 3
augtool> save
Saved 1 file(s)

But I can''t see how this would translate to work in Puppet as I need to
match the relevant path before I can issue the rm. Am I missing
something obvious here?

--
Paul Elliott, UNIX Systems Administrator
Computing Service, University of York

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> ... I know this can be done with a simple exec of sed but ...
Or with the "host" native type.  See
http://docs.reductivelabs.com/references/stable/type.html#host

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Hi David,

On 22/02/10 19:25, David Lutterkort wrote:
> You can do this by looking for the entries with a single path
> expression:
>         augtool> match /files/etc/hosts/*[ipaddr =
''127.0.1.1'']
> gives you all entries in /etc/hosts with that IP. To remove them, just
> do ''rm'' instead of ''match''. From your
post, I wasn''t sure if you had
<snip>
> [1] http://augeas.net/page/Path_expressions
Perfect, that''s just what I was looking for and it works like a charm.

Thanks, Paul.

--
Paul Elliott, UNIX Systems Administrator
Computing Service, University of York

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On a tangent, anybody using augeas under puppet to manage /etc/sudoers? ...
and how?

I was thinking about doing so to add/delete several commands to an
administrator group as part of setting up an apache/tomcat/whatever
instance, but cant figure out how to do it, for reasons similar to this
example. And rm doesnt work for adding :-P


--------------------------------------------------------
Jesús Couto F.

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On Feb 23, 2010, at 7:37 AM, Jesús Couto wrote:
> On a tangent, anybody using augeas under puppet to manage /etc/sudoers? ...
and how?
I tried, but all I could get it to do was add the entries to the end of
`/etc/sudoers` over and over every 30 minutes. I gave up and made a define that
calls some hacky execs.

I’d love to hear there’s a way (in 0.24.8).

-- 
Rob McBroom
<http://www.skurfer.com/>

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On Tue, 2010-02-23 at 14:02 -0500, Rob McBroom wrote:
> On Feb 23, 2010, at 7:37 AM, Jesús Couto wrote:
> 
> > On a tangent, anybody using augeas under puppet to 
> > manage /etc/sudoers? ... and how?
> 
> I tried, but all I could get it to do was add the entries to the end
> of `/etc/sudoers` over and over every 30 minutes. I gave up and made a
> define that calls some hacky execs.
> 
> I’d love to hear there’s a way (in 0.24.8).
I''d wager that the problem was that you were missing an onlyif that
would keep the changes from being applied when the entries are there
already.

David


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On Feb 24, 2010, at 6:32 PM, David Lutterkort wrote:
> On Tue, 2010-02-23 at 14:02 -0500, Rob McBroom wrote:
>> I’d love to hear there’s a way (in 0.24.8).
> 
> I''d wager that the problem was that you were missing an onlyif
that
> would keep the changes from being applied when the entries are there
> already.
I know that, and in theory you’re right. But bug #2141 has prevented so many of
my `onlyif`s from working in 0.24.8 that I don’t even bother trying.

I’m basically waiting until EPEL gets 0.25.x to really use Augeas.

-- 
Rob McBroom
<http://www.skurfer.com/>

Because it screws up the order in which people normally read text.

Original message:
> Why is it bad to top-post your reply?



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