How to get Linux OS logs off a Splunk server, where Splunk is started as a non root account, to index in an indexer cluster?

I have a Splunk indexer cluster that is using a service account (non-root) to start Splunk. How do I get the OS logs, like /var/log/messages, /var/log/secure etc... into the cluster indexes? I know that I could stream this to a syslog server and grab it there, but is there an easier way? Any thoughts are welcome!