Without any disrespect intended at all.. that sounds like a horrible and inefficient hack
If Wallfly drops, so will ssh (perhaps less often, but still..).
You're introducing yet another open connection on each box, plus the cpu resources required to encrypt data that you really needn't encrypt, plus the overhead of a parsing script that has to select() or poll() ~20 streams.
Seems clear to me that adding a few lines of ODBC to Wallfly is half as hard and complex.
I'm a database programmer by profession, just offering my $.02.