With each passing day, the sights and sounds surrounding Rex Ryan lead you to believe he knows his fate — even if nothing is official yet. For a coach who brought so much personality and identity to Woody Johnson’s franchise when he was hired, and had astonishing early success with the two AFC Championship Game appearances his first two years, this has become sad to watch. But Ryan’s fate with his team 2-9 and eliminated from the playoffs before Thanksgiving is something he had an idea was coming before the first game was played this season. Sources told The Post that, during the offseason, Ryan bumped into scouts and other coaches from around the league who told him Jets general manager John Idzik had been telling people his plan all along was to replace Ryan after the season and bring in his own head coach. “Did he think that wasn’t going to get back to me?” an angered Ryan told one confidant. All year, Ryan has been exasperated by the deficiency of talent Idzik has given him — particularly at cornerback, which is the most crucial position on his defenses. Through it all, he has remained a company man and kept those frustrations to himself, instead actually praising some of the ill-fated moves Idzik has made. Idzik staying more than $20 million under the salary cap this year was a clear message to Ryan there was not a strong commitment to win during a year in which Ryan knew he had to win to keep his job.