it should be trivial to se set alternative config path (not /etc/kubernetes)

[errordeveloper]

I'm using kubeadm on system where /etc is mounted read-only, and it was non-trivial to set alternative config path.

Namely, I had to do this:

env KUBE_KUBERNETES_DIR=/var/lib/kubeadm kubeadm init --skip-preflight-checks --kubernetes-version v1.6.1 --cert-dir /var/lib/kubeadm/pki

It should be just one argument. The main question is – why do we have separate --cert-dir flag?

There other good reasons why someone may wish to configure alternative path for configuration.