Keane watched the session from the sidelines after suffering a minor ankle problem, but goalkeeping coach Alan Kelly is confident the 33-year-old will be fit for Friday night's Group C encounter in Cologne.
"Hopefully, we will see how it goes," said Kelly. "We have got to fly out there
now and it is being monitored and we will make that assessment come Thursday and Friday.
"That's the precaution that we would take normally with anybody who has got
The Football Association of Ireland have revealed that interim manager Noel King has refused a request from LA Galaxy manager Bruce Arena to release Keane.
Arena had requested that the release of his striker be considered following the Germany match and before the match against Kazakhstan in Dublin on October 15.
But King has decided not to release Ireland's top goalscorer saying he hoped the Galaxy boss would understand his position, having been an international manager himself.
King cannot afford to lose any more of his senior players as John O'Shea and Richard Dunne will miss the match through suspension
Ireland will be hoping to keep alive their faint hopes of qualification with a win over the Group C leaders before facing Kazakhstan in Dublin four days later.
The Irish squad is expected to fly out of Dublin on Wednesday afternoon to complete their preparations in Germany.