[kube-router] Adds option to run kube-router as the service proxy

[captn3m0]

kube-proxy is disabled if service_proxy=true is passed

For a cluster with kube-router, it makes sense to give an option to use the native kube-router proxy instead of running kube-proxy alongside.

https://github.com/cloudnativelabs/kube-router#ipvslvs-based-service-proxy----run-service-proxy

[dghubble]

I'm glad you're experimenting with kube-router. I'm aware of the service proxy option and have done some testing with it in a similar branch. The daemonset is configured with the in-cluster kubeconfig to make service proxying possible (otherwise, bootstrapping will fail outright). The ability to provide service proxying is definitely a motivator for kube-router experiments.

But kube-router does not yet work properly with all the platforms it should, just acting as a CNI provider. And kube-router is experimental / unsupported - it may mature to become an official option in Typhoon or it may be dropped. So I think its premature to be enabling the service proxying yet.