Does the deployment server come with a universal forwarder of its own already installed on it?
I have a central indexer and on another server I have the deployment server setup.
Is there a universal forwarder installed on the deployment server so that it can log data about that server to my central indexer?
Actually Deployment Server is just a variant configuration of the standard Splunk Enterprise installation. You can configure it to operate as both a Deployment Server and a Splunk Light Forwarder. A Light Forwarder functions and is configured substantially identically to a Universal Forwarder, though the setup and installation is slightly different.
Just install Splunk on the box that will be the deployment server. Then go into the Manager and look for Forwarding and Receiving. Set the forwarding options. BTW, if you set it as a Light Forwarder, it will turn off the UI (which is fine for a deployment server).
You could also set outputs.conf directly and enable the Light Forwarder from the CLI.