Using the
master's private EC2 hostname, PE generates certificates which include the
master's public EC2 hostname and puppet
as alternate DNS names.
For more information about EC2 hostnames, see the EC2 hostname or IP address troubleshooting topic.
Managing EC2 nodes by their private hostname (rather than the public hostname) keeps their hostnames consistent if, for example, the node is resized or changed to a different EC2 instance type. This requires less work when administering a PE managed VPC.
Changing the master's hostname and regenerating certificates
While not recommended, you can change the hostname of your Puppet master and use this hostname to generate new PE certificates. Do this before you connect any agents to the master.
For more information about parameters for configuring and tuning the Puppet master, see the supported PE versions topic. Refer to the PE configuration settings for the PE version you are currently using.