今天在开发环境遇到问题，通过 kubectl delete namespace 失败，提示了 valiate.namespace.dev 的 webhook 的错误，造成删除 webhook 失败，解决办法删除 webhook
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[root@k-m1 manifests]# kubectl get ValidatingWebhookConfiguration
NAME WEBHOOKS AGE
cert-manager-webhook 1 182d
elastic-webhook.k8s.elastic.co 13 122d
flink-operator-default-webhook-configuration 1 182d
kubegems-local-controller-webhook 7 98d
rook-ceph-webhook 5 171d
seldon-validating-webhook-configuration-seldon-system 1 97d
[root@k-m1 manifests]# kubectl delete ValidatingWebhookConfiguration kubegems-local-controller-webhook
validatingwebhookconfiguration.admissionregistration.k8s.io "kubegems-local-controller-webhook" deleted
[root@k-m1 manifests]# kubectl delete ns kong-test
namespace "kong-test" deleted
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发现删除完 webook 之后，即可正常删除 namespacee
参考文档：
https://www.51cto.com/article/712358.html