Cake:Stir together flour, sugar,cinnamon, baking soda, and salt. Add pineapple, oil eggs, bananas, nuts, and vanilla to flour mixture. Stir just to blend. Pour into cake 13x9 greased bunt pan. Bake until inserted toothpick comes out clean at 325. Cool completely. Turn out cake onto a cake plate.
Glaze: Combine melted butter and powder sugar. Add just enough pineapple juice to make desired drizzling consistency. drizzle over cake.