You should not need to drain for kube-proxy, it is not saving any
state that it can't fix on fly.  Kubelet doesn't save much/any state
YET, but it might in the future.  Draining updates of kubelet are a
hugely simplifying assumption, and frankly will dodge a whole class of
potential live-update issues.  I don't know if we have a requirement
for that or just a recommendation.

On Tue, Jul 25, 2017 at 8:11 AM, Matthias Rampke <m...@soundcloud.com> wrote:
> Hey,
>
> I could not find an easy answer for this, and I suppose it's a bit of a
> niche question – what's the correct ordering to upgrading kubelet /
> kube-proxy on live nodes?
>
> Usually (except for the upgrade onto 1.6) we just upgrade either of them and
> restart, then the other, all the while the node is running production pods.
> For 1.6, I'm actually draining the nodes for kubelet but not kube-proxy.
> Because of reasons, it's difficult for me to upgrade both at the same time.
>
> 1) is upgrading the two separately supported at all?
> 2) is upgrading either of them without draining the node supported?
> 3) if it is, which way should I do it? does a new kubelet support an older
> kube-proxy, or the other way around?
>
> Thanks,
> MR
>
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