Hello,
I would like to know if there is a (sane) way to allow multiple
declarations of the same exported resource to result in only one
instance of that resource being instantiated on a given node.
Allow me to explain :
- Node "infra" includes class "syslog::server".
- Definition "syslog__naglog" allows configuration snippets to be added
to the syslog configuration.
- Many nodes contain class "snmpd".
- Class "snmpd" calls definition "syslog__naglog" as an exported
resource in the form "@@syslog_naglog", thus there are multiple
declarations for this resource across the ecosystem.
- Class "syslog::server" realizes the exported resource in the forst
"Syslog__naglog <<||>>".
Now this will, predictably, result in a "cannot override local resource"
problem. I could fix this by ensuring that each instantiation has a
unique name (via $fqdn or some such), however, that would result in each
node adding a configuration snippet to the syslog.conf on node "infra",
which is not in fact what I'm looking for.
I'm looking for a way to say to node "infra" that since class "snmpd" is
out there, somewhere, regardless of how many times, that one (and only
one) configuration line should be added to the local syslog config - and
I'd like to be able to do this from the "snmpd" class.
I know that I could do it rather simply from class "syslog::server" (for
example), but I'd like it to be dynamic - I'd like other modules to be
able to trigger the addition of a given configuration snippet in the
syslog config of node "infra".
Can this be done ? Is this realistic ? Is there another approach that
would be better ? I would greatly appreciate any and all commentary.
Thank you.
--
Daniel Maher
« makin' plans now to live on Mars 'cuz I got Earth on lock. »
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