Puppet node_aws fingerprint vs configprint

[Ignasi López]

Hi! 

I've been playing with puppet node_aws on my ec2 instances and there is a problem which I don't know how to solve it. 

The problem is: when i run puppet node_aws bootstrap in order to create and install puppet in new instance, I see at the end of logs:

debug: Command: sudo puppet agent --configprint certname err: fingerprint f4:19:2a:53:b9:43:26:73:2e:b6:b7:9c:18:c3:db:aa does not match for "ec2-107-21-150-66.compute-1.amazonaws.com,10.122.94.180"

I tried to execute puppet agent --configprint certname and I get "ec2-107-21-150-66.compute-1.amazonaws.com,10.122.94.180" why puppet is expecting the fingerprint ?

I haven't found information about --configprint parameter. What is the function of this parameter? And why has "certname" as a value? 

Maybe if i could understant this parameter I would find the solution of my problem.

Thanks,

Ignasi