# NGINX Ingress控制器插件处于Unknown状态时卸载残留
#### 问题现象
NGINX Ingress控制器插件处于Unknown状态时，卸载插件会出现组件残留。
NGINX Ingress控制器插件涉及的K8s资源：
- 命名空间级别资源：secret、configmap、deployment、service、role、rolebinding、lease、serviceAccount、job
- 集群级别资源：clusterRole、clusterRoleBinding、ingressClass、validatingWebhookConfiguration
 
#### 解决方案
1. 使用kubectl连接集群。
2. 查找NGINX Ingress相关资源。 
   ```
   className="nginx"
   namespace="kube-system"
   className=`if [[ ${className} == "nginx" ]]; then echo ""; else echo "-${className}";fi`
   kubectl get -n ${namespace} secret sh.helm.release.v1.cceaddon-nginx-ingress${className}.v1 cceaddon-nginx-ingress${className}-admission 
   kubectl get -n ${namespace} cm cceaddon-nginx-ingress${className}-controller
   kubectl get -n ${namespace} deploy cceaddon-nginx-ingress${className}-controller cceaddon-nginx-ingress${className}-default-backend
   kubectl get -n ${namespace} svc cceaddon-nginx-ingress${className}-controller-admission cceaddon-nginx-ingress${className}-default-backend cceaddon-nginx-ingress${className}-controller
   kubectl get -n ${namespace} role cceaddon-nginx-ingress${className}
   kubectl get -n ${namespace} rolebinding cceaddon-nginx-ingress${className}
   kubectl get -n ${namespace} lease ingress-controller-leader${className}
   kubectl get -n ${namespace} serviceAccount cceaddon-nginx-ingress${className}
   kubectl get clusterRole cceaddon-nginx-ingress${className}
   kubectl get clusterRoleBinding cceaddon-nginx-ingress${className}
   kubectl get ingressClass ${className}
   kubectl get ValidatingWebhookConfiguration cceaddon-nginx-ingress${className}-admission
   ```
   其中className为控制器名称，namespace为安装NGINX Ingress控制器的命名空间。
   
   
3. 如果集群中存在上述资源，请手动删除残留资源。