Hi list (specifically Dan),
I was interested in the snippet you provided in the recent thread
"Collection and Realizing resources" and how it could be used to
safely include both 'app' and 'db' class without causing a conflict in
the user 'bob'. I can't quite see how that's possible, even using
class inheritance and the plusignment operator, you'd run into trouble
overriding the same resource twice (bob). How does the collection
syntax help?
Quoting Dan:
We have only been teaching <| |> in the puppetmaster training as a way
to
realize virtual resources. We do not teach that it is possible to
override
attributes with this syntax as well: <| |> {} (at least in part b/c
the
implications/non-determinism terrify me) , and do not teach that it
actually
effects all resources.
The common example from class is something like:
class db::users {
user { ['alice', 'bob']:
ensure => present,
gid => 'dbadmin',
}
}
class app::users {
user { ['charlie', 'bob']:
ensure => present,
gid => 'webadmin',
}
}
class app {
User<| gid == 'webadmin' |>
...
}
class db {
User<| gid == 'dbadmin' |>
...
}
so that a machine can safely be a webserver and db server without
conflict.
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