Growing up we had our dogs chained outside. When my sister was old enough to get "her own" dogs we got kennels. The dogs that were chained were not aggressive at all. They got multiple daily walks out in the grove, off leash.
The dogs my mom has now never really go in the kennels. Pepsi will stay in the back yard, and Little Bit stays in the house in a crate if my parents are gone (which is hardly ever since they are retired). But my dogs and my brothers dogs do go in the kennels when someone is not home with them. Which, again, is not often since my brother works from home.