On 2016-06-20 01:16 PM, Helmut Schneider wrote:
Peter Kristolaitis wrote:
How can I ensure that mpm_* is always the first element in the
array?
Assuming you're trying to solve the problem I think you're trying to
solve (i.e. to have Apache with the correct process model installed
before any additional modules), it's important to note that
reordering the array doesn't guarantee that. The order in which
Puppet applies resources is non-deterministic unless you have
explicit ordering.
You're probably better off solving this problem in a different way;
for example by creating a new data element (e.g.
profiles::webserver::apache::process_model), and then specifying
explicit ordering between the process_model package and the modules
packages.
I'm using puppetlabs/apache to install apache. I already created 4
classes, apache24::install, apache24::modules, apache24::default_hosts
and apache::config to ensure the ordering of the installation process.
apache24::install includes apache{}, where I define "mpm_module =>
false," to be able to provide my own mpm_ module.
Then I call apache24::modules to install the appropriate mpm_ and other
modules.
Why wouldn't you just set a value for apache::mpm_module? You're trying
to re-implement functionality that's already handled by the apache
module (and has been tested by a bunch of other people).
From a higher-level logical model perspective, this makes more sense --
installing an MPM is part of the basic installation of Apache (you must
have exactly one MPM configured for the system to do anything useful),
so it belongs in the module that does "install Apache".
Even though technically MPM is implemented as modules on the vast
majority of systems, it's a very different kind of module than, say,
mod_rewrite, and should be treated differently.
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