module(load="imfile" PollingInterval="10") #needs to be done just once

# needs to be done for each file you want to watch
input(type="imfile" File="/path/to/file1" 
     Tag="tag1" 
      StateFile="statefile1" 
      Severity="error" 
      Facility="local7")

在the rsyslog documentation site有更多信息