add flag for reading pods from kube-apiserver cache

[dreamerlzl]

Current listing of pods can go to etcd directly without hitting cache in apiserver. Adding an optional flag to reduce the load on etcd side by setting resourceVersion=0.

[brancz]

Is there a good reason not to make this default?

Another thing I've recently been thinking about, we already have a trigger where we list pods when we don't have metadata. What if we used the kubelet's local pods endpoint instead of hitting the apiserver at all?

[dreamerlzl]

Is there a good reason not to make this default?

Another thing I've recently been thinking about, we already have a trigger where we list pods when we don't have metadata. What if we used the kubelet's local pods endpoint instead of hitting the apiserver at all?

I believe that's even better by using kubelet's local pods. Shall we do this in a another pr?

[brancz]

Sounds good to me!

[dreamerlzl]

Just realize that to query kubelet API proper configuration for authentication & authorization are required. I will craft a draft first and let's see.

[dreamerlzl]

Btw, can we merge this pr first?