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

问题分析

环境变量
原因：kubernetes master没有与本机绑定，集群初始化的时候没有绑定，此时设置在本机的环境变量即可解决问题。

解决：
步骤一：设置环境变量

##具体根据情况，此处记录linux设置该环境变量
ll /etc/kubernetes/kubelet.conf
-rw------- 1 root root 1906 1月  15 09:52 /etc/kubernetes/kubelet.conf

##方式一：编辑文件设置
vim /etc/profile
>>在底部增加新的环境变量 export KUBECONFIG=/etc/kubernetes/kubelet.conf

##方式二:直接追加文件内容
echo "export KUBECONFIG=/etc/kubernetes/kubelet.conf" >> /etc/profile

步骤二：使生效

source /etc/profile

二、INSTALLATION FAILED: cannot re-use a name that is still in use

#执行helm安装时报错
Error: INSTALLATION FAILED: cannot re-use a name that is still in use

解决：

helm ls --all-namespaces
kubectl delete namespace qsh-test
kubectl create namespace qsh-test

三、Namespace无法删除

unable to create new content in namespace posthog because it is being terminated

现象：

##命名空间一直处于Terminating状态
[ec2-user@eks posthog]$ kubectl get ns -owide
NAME                       STATUS        AGE
default                    Active        3d
kube-node-lease            Active        3d
kube-public                Active        3d
kube-system                Active        3d
posthog                    Terminating   3h23m

##执行强制删除命令会一直卡住
[ec2-user@eks posthog]$ kubectl delete ns posthog --grace-period=0 --force
warning: Immediate deletion does not wait for confirmation that the running resource has been terminated. The resource may continue to run on the cluster indefinitely.
\namespace "posthog" force deleted

解决：

##查看posthog的命名空间描述
kubectl get ns posthog -o json > ns-posthog.json

##删除spec
###删除前内容如下：
    "spec": {
        "finalizers": [
            "kubernetes"
        ]
    },

###删除后内容如下：
    "spec": {
    },

##打开一个新窗口运行kubectl proxy跑一个API代理在本地的8081端口
kubectl proxy --port=8081

##curl删除
curl -k -H "Content-Type:application/json" -X PUT --data-binary @ns-posthog.json http://127.0.0.1:8081/api/v1/namespaces/posthog/finalize

##重新检查，发现已删除
kubectl get ns