I see a recent pull request was merged to remove the net.experimental.kubernetes.io/proxy-mode and net.beta.kubernetes.io/proxy-mode annotations.

My application's reverse proxy servers currently work much better when the proxymode is set to userspace, and I would like to keep using this setting after upgrading.

Since Google Container Engine hosts the Kubernetes master, and I cannot directly access that VM, how can I configure the kube-proxy proxymode without using annotations? Ideally I could change a cluster-wide setting so that new nodes (after autoscaling) also use the userspace proxy mode.