did you run below commands after kubeadm init
To start using your cluster, you need to run (as a regular user):
sudo cp /etc/kubernetes/admin.conf $HOME/ sudo chown $(id -u):$(id -g) $HOME/admin.conf export KUBECONFIG=$HOME/admin.conf
ref: https://github.com/kubernetes/kubernetes/issues/44665
kubectl error: The connection to the server localhost:8080 was refused
原文：http://www.cnblogs.com/pinganzi/p/6832297.html