[v1alpha2] Try to not to always claim pods

[gaocegege]

#526 (comment)

[ddysher]

My original thought is to rename the function to better capture its intent (get and claim). This is just for clarity, and I do think it's necessary to patch the pods in each controller iteration: reconciliation is the reason we need controller (i hope there is optimization in apiserver side to not actually update the backend if data doesn't change).

If that's how kubernetes upstream controller name the function, let's just stick with it (even if i think it's a bad name :). naming is hard anyway

[gaocegege]

I agree, thus closing it now.