support resource limit trait

[wonderflow]

Now we have resource minimum in Component definition, the operator may want to define resource limit. So we need resource limit as a Trait.

[zhxu2]

I can pick this one up and work on it

[wonderflow]

cool!

[zhxu2]

Now we have resource minimum in Component definition, the operator may want to define resource limit. So we need resource limit as a Trait.

I am wondering what's the conclusions we got from multiple oam-spec issues concerning "resource limit" trait. Have we decided to have both requests & limits made required for developers?

From the operator's point of view, it makes little sense to have a "default" config for every other applications.