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I understand what you mean, but... I try to explain the use case.

1. consul runs services. 
2. each service can have more than one host associated to it
3. I want to setup a monitoring check for the service and not for the host: the check would be the same for all the nodes within the same service. 

I understand that it's not possible... resource collection probably doesn't allow to check for dupilcates

the name of the resource doesn't have to be equal to the name of the check

The monitoring check can be whatever it needs to be.  Puppet just needs to identify each of them uniquely.

<https://github.com/sensu/sensu-puppet/blob/master/lib/puppet/type/sensu_check.rb#L59>

so, use
```@@sensu_check{ "${facts['certname']}-check-consul-production-prod-postgres":
  name =&gt; 'check-consul-production-prod-postgres',```


I was looking the same file :slightly_smiling_face:

Is there a puppet query that will allow me to see the fact value for `virtual` for systems that have a specific class on it?

the answer is yes :slightly_smiling_face:

It looks like I need some combo of the `facts[]` and `resources[]` endpoint, but I'm not sure how to join them

```puppet query 'inventory[certname,facts.virtual]{resources { type = "Class" and title = "My_class"}}'```

if only that worked :slightly_smiling_face:

I meant :heavy_plus_sign: :slightly_smiling_face:

it doesn't work.
```Error: Could not retrieve catalog from remote server: Error 500 on SERVER: Server Error: Puppet::Parser::Compiler failed with error ArgumentError: Cannot alias Sensu_check[puppetdb02.xxxx.org-check-consul-production-puppetdb] to ["check-consul-production-puppetdb", nil]; resource ["Sensu_check", "check-consul-production-puppetdb", nil] already declared on node prod-sensu01.xxxxx.xxxx```
as I understand puppet is checking the "name" in the end

in terms of duplication, it will check the name, but sometimes it will also check another parameter. e.g. the `path` parameter on a file resource can't be duplicated even if the resource title isn't duplicated.

You might try exporting the service names, then de-duping that array first before implementing resources:
<https://whatsaranjit.github.io/puppet/2017/07/22/Sharing_Data/>

Afternoon/Morning! Can anyone give me any advice on where to start researching deployment methods using Puppet/Puppet Bolt? To give an example of how/what I'm looking for.  Let's say I have 1k agents. I would like to deploy to any amount at any given time. Whether that be 1 agent or the entire 1k.