Hello,
I'm trying to figure out the best solution for using facts of other
nodes in manifests.
I understand the use of exported configs and the concat module but, I
think, when using someone's contributed module, unless they wrote the
module using those solutions, I would have to rewrite the module
myself.
Here is the best way I can explain the particular problem I'm running
into. Maybe I'm totally on the wrong path with this.
class my_mysql_server {
class { 'mysql::server': }
# other stuff as needed
# ...
}
node node1.example.com {
class { 'my_mysql_server': }
}
node node2.example.com {
class { 'some::app::db':
db_username => 'foo',
db_password => 'password',
db_host => $my_mysql_server::fqdn,
}
}
In this case, 'some::app' is a contributed module. $db_host in 'db.pp'
simply references a single variable in a template - not a loop and not
using concat.
This does work, but I'm not entirely comfortable with it. For one, if
my_mysql_server is never applied, $fqdn will not be available. This
generally won't happen in the above example, but it's still a concern
I have. Secondly, if I choose to apply my_mysql_server to two nodes,
there would be more than one result for db_host. I'm not exactly sure
how to get around this.
What's the best practice for this type of situation? Should I just
hard-code the fqdn of my_mysql_server and be done with it? Or is there
a more dynamic way to do this?
Thanks,
Joe
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