Comment 1 for bug 1521369

I think both directories can be used for keeping certificates. Kubernetes specifically doesn't say about which directory to keep. But in examples it has used /srv/kubernetes
http://kubernetes.io/docs/getting-started-guides/scratch/#security-models

And coreos uses /etc/kubernetes/ssl
https://coreos.com/kubernetes/docs/latest/deploy-master.html

Others can suggest what value should be set