My 2 1/2-yr-old was always happy and bright-eyed in the morning until recently. Now, it's just as you described: practically dragging him out of bed in the morning.
I did 2 things that have helped. First, I started putting him to bed a half-hour earlier (from 7:00 to 6:30). Second, I get up in the morning and take my shower. Then I open my son's door and turn on the hall light while I do my hair and get dressed. That helps him slowly transition to getting up. I've found him already up when I'm done many times, so it's been working pretty well.
Don't know if it'll work for your little one, but it couldn't hurt to try. Good luck.