解决The connection to the server localhost:8080 was refused - did you specify the right host or port?

1.问题

2.原因

kubectl命令需要使用kubernetes-admin来运行，需要admin.conf文件（conf文件是通过“ kubeadmin init”命令在主节点/etc/kubernetes 中创建），但是从节点没有conf文件，也没有设置 KUBECONFIG =/root/admin.conf环境变量，所以需要复制conf文件到从节点，并设置环境变量就OK了

3.资料

The connection to the server localhost:8080 was refused - did you specify the right host or port? · Issue #50295 · kubernetes/kubernetes · GitHub
The connection to the server localhost:8080 was refused - did you specify the right host or port? - General Discussions - Discuss Kubernetes

4.解决

主节点的admin.conf拷贝到从节点，设置环境变量

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

或

#拷贝admin.conf注意路径
echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile
source ~/.bash_profile