On Tuesday, October 16, 2018 at 3:54:13 AM UTC-5, comport3 wrote:
>
> Hi All,
>
> We are integrating a new PuppetDB role, and note that there are some key
> tuning parameters we'd like to modify to optimise the performance, such as
> 'shared_buffers' and 'work_mem'. Normally the methods to do this would be a
> straight parameter lookup in Hiera, however these values are nested within
> a Hash. No problem I hear you say, just use 'create_resources'..
>
Well no, what *I* say is *what* problem? Hiera has no problem whatever
providing hashes to Puppet, including for automatic data binding. If the
value associated with a given key in your data is a hash, then that's what
Hiera provides. That has always worked, and it is more flexible now than
ever.
> well that's what I'd normally do next, however trying to declare it in a
> 'profile' class it complains of a 'duplicate class declaration'...
>
> Steps to reproduce -
> 1. puppet module install puppetlabs-puppetdb
> 2. class profile::puppetdb {
> include profile::fw::puppetdb
> include ::puppetdb
> class { 'postgresql::server':
> config_hash => {
> 'shared_buffers' => '512MB',
> 'work_mem' => '16MB',
> }
> }
> }
>
>
If you want the config_hash parameter of class postgresql::server to
receive that hash via automated data binding, then you need two things:
1. You need appropriate data. For example:
postgresql::server::config_hash:
shared_buffers: '512MB'
work_mem: '16MB'
2. You need any applicable resource-like declaration of class
postgresql::server in the manifest set to not itself bind a value to the
config_hash parameter.
It's not clear to me why you're shooting straight past that toward more
complicated and riskier possibilities.
John
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