参考：https://blog.csdn.net/lxy___/article/details/106644302

调用API接口删除

[root@master ~]# netstat -ntlp | grep kube-apiserve
tcp6       0      0 :::6443                 :::*                    LISTEN      7737/kube-apiserver 
#API接口查询 
[root@master ~]# kubectl get ns monitoring -ojson > tmp.json
#导出信息

修改如下内容

[root@master ~]# cat tmp.json
{"apiVersion": "v1","kind": "Namespace","metadata": {"annotations": {"kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"v1\",\"kind\":\"Namespace\",\"metadata\":{\"annotations\":{},\"name\":\"monitoring\"}}\n"},"creationTimestamp": "2020-04-24T01:39:40Z","deletionTimestamp": "2020-06-09T07:22:46Z","name": "monitoring","resourceVersion": "30261","selfLink": "/api/v1/namespaces/monitoring","uid": "3fdd71e6-9693-4d44-bd8a-f1e54799cde4"},"spec": {"finalizers": ["kubernetes"]},"status": {"phase": "Terminating"}
}

删除以下代码段

"spec": {"finalizers": ["kubernetes"]
},

权限问题

修改完成后，直接调用API接口会有报错如下curl -k -H "Content-Type: application/json" -X PUT --data-binary @tmp.json https://127.0.0.1:6443/api/v1/namespaces/monitoring(替换成自己要删除的ns)/finalize
{"kind": "Status","apiVersion": "v1","metadata": {},"status": "Failure","message": "namespaces \"monitoring\" is forbidden: User \"system:anonymous\" cannot update resource \"namespaces/finalize\" in API group \"\" in the namespace \"monitoring\"","reason": "Forbidden","details": {"name": "monitoring","kind": "namespaces"},"code": 403

此时需要创建匿名用户的权限，命令如下

kubectl create clusterrolebinding test:anonymous --clusterrole=cluster-admin --user=system:anonymous

再次调用

curl -k -H "Content-Type: application/json" -X PUT --data-binary @tmp.json https://127.0.0.1:6443/api/v1/namespaces/monitoring(替换成自己要删除的ns)/finalize
{"kind": "Namespace","apiVersion": "v1","metadata": {"name": "monitoring","selfLink": "/api/v1/namespaces/monitoring/finalize","uid": "3fdd71e6-9693-4d44-bd8a-f1e54799cde4","resourceVersion": "30261","creationTimestamp": "2020-04-24T01:39:40Z","deletionTimestamp": "2020-06-09T07:22:46Z","annotations": {"kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"v1\",\"kind\":\"Namespace\",\"metadata\":{\"annotations\":{},\"name\":\"monitoring\"}}\n"}},"spec": {},"status": {"phase": "Terminating"}

删除成功

[root@master ~]# kubectl get ns
NAME              STATUS   AGE
default           Active   46d
kube-node-lease   Active   46d
kube-public       Active   46d
kube-system       Active   46d