On 27 Giu, 09:02, Douglas Garstang <doug.garst...@gmail.com> wrote:
> I've been struggling with puppet variable scope all day, well, for
> several months actually.
>
> I think I have pretty simple requirements. For any given node, I want
> to be able to set a series of variables and include a set of classes,
> based on three different aspects of a node, being physical location,
> operating system, and function. If I try and do this with classes, I
> find that variables set in a class included from a node, are not
> visible to other classes included from that node.
>
> node 'node1.fr.xxx.com' {
> include facility::sjc
> include ldap::client
>
> }
>
> In this example, variables defined in facility::sjc are not visible in
> ldap::client (in this case, it would be the IP address of the local
> LDAP server).
>
> Another approach is to do everything with node inheritance, but in
> order to model these three functions, you end up with nodes with names
> like sjcDellBootServer or nycVmwareBootServer, which is just plain
> stupid.
Node names don't need to adapt to inheritance's logic.
You can do something like:
node sjc {
ldap_server="10.10.10.10"
}
node 'node1.fr.xxx.com' inherits sjc {
include ldap::client
}
When using nodes' inheritance the only real thing you've to care about
is to define variables BEFORE including any class.
So at the end it's better to include classes only in the node that
defines your host nad never in the "intermediary" nodes that can
represent facilities, networks or whatever.
On the other way, this also should work, if you want to define your
variables in a class:
class ldap::client {
include facility::sjc
do_something with "${facility::ldap_server}" in this class
BUT if you need to use "${facility::ldap_server}" in a template you
should reassing it to a local variable (dunno if the problem is the
colon or whatever I just found the problem and made a quick fix with
somehting like):
$my_ldap_server="${facility::ldap_server}"
and use $my_ldap_server in the template.
}
I'd avoid to use inheritance in the included class (facility::sjc
should not inherit anything)
Dunno if I've been clear with this example. Hope it helps
Al
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