There is an option that can be defined within Spinal Stack that allows for us to specify the logging destination for HAProxy.  Since they have a split control plane, the HAPRoxy logs take on a whole new level of importance in troubleshooting stack issues that occur and to help cut down on the clutter of /var/log/messages that was being created we moved the logging out to its own directory.  I cannot recall at this time if there was a puppet class that was predefined that I used in Spinal Stack to be able to do this, but I seem to recall possibly having to create one.  If one doesn't exist, then it would be a nice one to have.