On Wed, Feb 9, 2011 at 08:41, Klaus Ethgen <[email protected]> wrote:
Sorry for jumping in late to this discussion, but:
To answer the original query, "is it possible to change which IP
address is used?":
No, it is not possible, because this is a daft fact that *claims* to
deliver something that is, in fact, not an actual bit of information.
So, don't expect significant work to "improve" the ipaddress fact,
which is a sow's ear, and unlikely to ever become a silk purse.
As to...
> Hmm.. I had similar problem without solving it the elegant way until
> now.
>
> But how about the following algorithm:
> - - Check which interface has the default routing
> - - If no default routing take the first one
...the proposed algorithm fails entirely on machines with more than
one "default" route, or without a default route at all, because it
will pick the wrong answer for a subset of systems. It /might/ be a
smaller subset of systems but, honestly, I doubt it would be. The
only place it really works is a single-address system with a single
NIC, and those usually don't have an extra address to fool the tool
anyhow.
The correct answer is that if you believe that your machine has a
primary IP address of some description then, indeed, you need to
supply a custom fact that determines whatever it is by the rules of
your own network.
Historically, I actually found it much more valuable to use this sort
of construction:
# The syntax is from memory, and I always get generate wrong, but
you should get the idea.
$main_ip = generate('/usr/local/bin/get-ip-from-dns-for', $fqdn)
That would run on the master and consult an authoritative database to
get the identity of a machine by name, which is generally what is
actually desired in this particular fact.
Also notable is the fact that using appropriate convention allows you
to have *multiple* identities for machines with multiple addresses,
something that is almost always a true situation for such hosts.
Regards,
Daniel
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