是的，您肯定对API服务器有疑问。我给你的建议是清除所有，更新
docker.io，
kubelet，
kubeadm，
kubectl到最新版本，并从头开始。
让我逐步帮助您：
擦除当前集群，更新根目录下的软件包：
#kubeadm reset -f && rm -rf /etc/kubernetes/#apt-get update && apt-get install -y mc ebtables ethtool docker.io apt-transport-https curl#curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -#cat <<EOF >/etc/apt/sources.list.d/kubernetes.list deb http://apt.kubernetes.io/ kubernetes-xenial main EOF#apt-get update && apt-get install -y kubelet kubeadm kubectl
确保kubelet使用的cgroup驱动程序与Docker使用的驱动程序相同。确认您的Docker cgroup驱动程序与kubelet配置匹配：
#docker info | grep -i cgroup#cat /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
检查版本：
root@kube-master-1:~# docker -vDocker version 17.03.2-ce, build f5ec1e2root@kube-master-1:~# kubectl versionClient Version: version.Info{Major:"1", Minor:"12", GitVersion:"v1.12.1", GitCommit:"4ed3216f3ec431b140b1d899130a69fc671678f4", GitTreeState:"clean", BuildDate:"2018-10-05T16:46:06Z", GoVersion:"go1.10.4", Compiler:"gc", Platform:"linux/amd64"}The connection to the server localhost:8080 was refused - did you specify the right host or port?root@kube-master-1:~# kubeadm versionkubeadm version: &version.Info{Major:"1", Minor:"12", GitVersion:"v1.12.1", GitCommit:"4ed3216f3ec431b140b1d899130a69fc671678f4", GitTreeState:"clean", BuildDate:"2018-10-05T16:43:08Z", GoVersion:"go1.10.4", Compiler:"gc", Platform:"linux/amd64"}root@kube-master-1:~# kubelet --versionKubernetes v1.12.1启动集群：
#kubeadm init --pod-network-cidr=10.244.0.0/16
以普通用户身份登录并运行以下命令：
mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config source <(kubectl completion bash) # setup autocomplete in bash into the current shell, bash-completion package should be installed first. echo "source <(kubectl completion bash)" >> ~/.bashrc # add autocomplete permanently to your bash shell.
检查集群：
$ kubectl cluster-infoKubernetes master is running at https://10.132.0.2:6443KubeDNS is running at https://10.132.0.2:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxyTo further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.$ kubectl get no -o wideNAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIMEkube-master-1 NotReady master 4m26s v1.12.1 10.132.0.2 <none> Ubuntu 16.04.5 LTS 4.15.0-1021-gcp docker://17.3.2$ kubectl get all --all-namespaces NAMESPACE NAME READY STATUS RESTARTS AGEkube-system pod/coredns-576cbf47c7-lw7jv 0/1 Pending 0 4m55skube-system pod/coredns-576cbf47c7-ncx8w 0/1 Pending 0 4m55skube-system pod/etcd-kube-master-11/1 Running 0 4m23skube-system pod/kube-apiserver-kube-master-1 1/1 Running 0 3m59skube-system pod/kube-controller-manager-kube-master-1 1/1 Running 0 4m17skube-system pod/kube-proxy-bwrwh 1/1 Running 0 4m55skube-system pod/kube-scheduler-kube-master-1 1/1 Running 0 4m10sNAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGEdefault service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 5m15skube-system service/kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP 5m9sNAMESPACE NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGEkube-system daemonset.apps/kube-proxy 1 1 1 1 1<none> 5m8sNAMESPACE NAMEDESIRED CURRENT UP-TO-DATE AVAILABLE AGEkube-system deployment.apps/coredns 2 2 2 05m9sNAMESPACE NAMEDESIRED CURRENT READY AGEkube-system replicaset.apps/coredns-576cbf47c7 2 2 0 4m56s
安装CNI（我更喜欢Calico）：
$ kubectl apply -f https://docs.projectcalico.org/v3.2/getting-started/kubernetes/installation/hosted/rbac-kdd.yamlclusterrole.rbac.authorization.k8s.io/calico-node createdclusterrolebinding.rbac.authorization.k8s.io/calico-node created$ kubectl apply -f https://docs.projectcalico.org/v3.2/getting-started/kubernetes/installation/hosted/kubernetes-datastore/calico-networking/1.7/calico.yamlconfigmap/calico-config createdservice/calico-typha createddeployment.apps/calico-typha createddaemonset.extensions/calico-node createdserviceaccount/calico-node createdcustomresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org createdcustomresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org createdcustomresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org createdcustomresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org createdcustomresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org createdcustomresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org createdcustomresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org createdcustomresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org createdcustomresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
检查结果：
$ kubectl get no -o wideNAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIMEkube-master-1 Ready master 9m15s v1.12.1 10.132.0.2 <none> Ubuntu 16.04.5 LTS 4.15.0-1021-gcp docker://17.3.2$ kubectl get all --all-namespaces NAMESPACE NAME READY STATUS RESTARTS AGEkube-system pod/calico-node-tsstf 2/2 Running 0 2m3skube-system pod/coredns-576cbf47c7-lw7jv 1/1 Running 0 9m20skube-system pod/coredns-576cbf47c7-ncx8w 1/1 Running 0 9m20skube-system pod/etcd-kube-master-11/1 Running 0 8m48skube-system pod/kube-apiserver-kube-master-1 1/1 Running 0 8m24skube-system pod/kube-controller-manager-kube-master-1 1/1 Running 0 8m42skube-system pod/kube-proxy-bwrwh 1/1 Running 0 9m20skube-system pod/kube-scheduler-kube-master-1 1/1 Running 0 8m35sNAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGEdefault service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 9m40skube-system service/calico-typha ClusterIP 10.105.62.183 <none> 5473/TCP 2m4skube-system service/kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP 9m34sNAMESPACE NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGEkube-system daemonset.apps/calico-node 1 1 1 1 1beta.kubernetes.io/os=linux 2m4skube-system daemonset.apps/kube-proxy 1 1 1 1 1<none> 9m33sNAMESPACE NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGEkube-system deployment.apps/calico-typha 0 0 0 02m4skube-system deployment.apps/coredns 2 2 2 29m34sNAMESPACE NAME DESIRED CURRENT READY AGEkube-system replicaset.apps/calico-typha-5f646c475c 0 0 0 2m4skube-system replicaset.apps/coredns-576cbf47c7 2 2 2 9m21s$ sudo docker ps -a | grep api996cf65268fe dcb029b5e3ad "kube-apiserver --..." 10 minutes ago Up 10 minutes k8s_kube-apiserver_kube-apiserver-kube-master-1_kube-system_371bd9e2260dc98257ab7a6961e293b0_0ab9f0949b295 k8s.gcr.io/pause:3.1 "/pause" 10 minutes ago Up 10 minutes k8s_POD_kube-apiserver-kube-master-1_kube-system_371bd9e2260dc98257ab7a6961e293b0_0
希望这会帮助你。
