我遇到直接使用kubctl 名利的时候，必须加上
-s ip:port这个参数，当时避免了这个问题，后来才明白为啥还要加上-s 127.0.0.1:8089，是自己将默认的8080端口给改掉了。导致服务运行的时候，不知道端口了，默认 kubctl 会找localhost:8080的服务的。改这个需要修改四个配置文件，分别是父节点的/etc/kubernetes/apiserver，/etckubernetes/config和子节点的，/etc/kubernetes/kubelet配置文件，以及/etckubernetes/config。然后先重启父节点，然后再重启子节点。然后就可以愉快的玩耍了，再也不需要输入 -s 的参数了。
修改apiserver配置
vim /etc/kubernetes/apiserver
###
# kubernetes system config
#
# The following values are used to configure the kube-apiserver
#
# The address on the local server to listen to.
KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
# The port on the local server to listen on.
KUBE_API_PORT="--port=8080"
# Port minions listen on
# KUBELET_PORT="--kubelet-port=10250"
# Comma separated list of nodes in the etcd cluster
KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.10.2:2379"
# Address range to use for services
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
# default admission control policies
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,ResourceQuota"
# Add your own!
KUBE_API_ARGS=""
2.修改/etckubernetes/config
vim /etc/kubernetes/config
# logging to stderr means we get it in the systemd journal
KUBE_LOGTOSTDERR="--logtostderr=true"
# journal message level, 0 is debug
KUBE_LOG_LEVEL="--v=0"
# Should this cluster be allowed to run privileged docker containers
KUBE_ALLOW_PRIV="--allow-privileged=false"
# How the controller-manager, scheduler, and proxy find the apiserver
KUBE_MASTER="--master=http://192.168.10.2:8080"
3/重启服务
重启服务后，可以看到，apiserver的路径为8080端口了。
systemctl restart etcd kube-apiserver.service kube-controller-manager kube-scheduler
修改子节点
修改子节点的/etckubernetes/config和 /etc/kubernetes/kubelet这两个配置文件，config这个文件，和刚刚的主节点的一毛一样，至于kubelete这个，就需要重新修改一下了。
vim /etc/kubernetes/kubelet
KUBELET_ADDRESS="--address=0.0.0.0"
# The port for the info server to serve on
# KUBELET_PORT="--port=10250"
# You may leave this blank to use the actual hostname
KUBELET_HOSTNAME="--hostname-override=192.168.10.2"
# location of the api-server
KUBELET_API_SERVER="--api-servers=http://192.168.10.2:8080"
# pod infrastructure container
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
# Add your own!
KUBELET_ARGS=""
重启子节点
systemctl restart kubelet kube-proxy
#直接获取节点，可以看到，不需要加上kuberctl -s 127.0.0.1:8080 get nodes
kuberctl get nodes 可以看到，修改了端口，和监听，直接就可以kuberctl访问了，完全不需要加上-s ip:port了。
