k8s无法删除namespace

kubernetes 删除 namespace 但是一直处于 Terminating 状态

# 查看namespace

这里可以看到之前部署 kubesphere 生成的 namespace 没删掉

[root@master ]# kubectl get ns
NAME                           STATUS        AGE
cattle-logging                 Active        2d20h
cattle-prometheus              Active        2d19h
cattle-system                  Active        2d20h
default                        Active        11d
fleet-system                   Active        2d20h
kspark                         Active        11d
kube-node-lease                Active        11d
kube-public                    Active        11d
kube-system                    Active        11d
kubeapps                       Active        11d
kubesphere-controls-system     Terminating   4d23h
kubesphere-monitoring-system   Terminating   4d23h
monitoring                     Active        4d3h

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# 解决方法一

首先导出json格式到xxx.json

[root@master ]# kubectl get namespace kubesphere-controls-system -o json > xxx.json
[root@master ]# kubectl get namespace kubesphere-monitoring-system -o json > yyy.json
[root@master ]# ll
-rw-r--r-- 1 root root  4751 2月   7 14:33 xxx.json
-rw-r--r-- 1 root root  4693 2月   7 14:36 yyy.json
[root@master ]#

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编辑xxx.josn，yyy.josn删除finalizers 字段的值

"finalizers": [
            "finalizers.kubesphere.io/namespaces"
        ],

#改为


"finalizers": [ ],

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开启 proxy

[root@master ]# kubectl proxy
Starting to serve on 127.0.0.1:8001

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新开窗口执行

[root@master ]# curl -k -H "Content-Type: application/json" -X PUT --data-binary @xxx.json http://127.0.0.1:8001/api/v1/namespaces/kubesphere-controls-system/finalize
[root@master ]# curl -k -H "Content-Type: application/json" -X PUT --data-binary @yyy.json http://127.0.0.1:8001/api/v1/namespaces/kubesphere-monitoring-system/finalize
[root@master ]#kubectl get ns
NAME                STATUS        AGE
cattle-logging      Active        2d20h
cattle-prometheus   Active        2d20h
cattle-system       Active        2d21h
default             Active        11d
fleet-system        Active        2d20h
kspark              Active        11d
kube-node-lease     Active        11d
kube-public         Active        11d
kube-system         Active        11d
kubeapps            Active        11d
monitoring          Active        4d4h

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原理其实就是将现有状态导出为json文件，再执行覆盖；

# 解决方法二

直接 edit 该资源，将 finalizers 字段的值删除（vim dd）

[root@master ]# kubectl get ns
NAME                STATUS   AGE
cattle-logging      Active   2d21h
cattle-prometheus   Active   2d20h
cattle-system       Active   2d21h
default             Active   11d
fleet-system        Active   2d21h
kspark              Active   11d
kube-node-lease     Active   11d
kube-public         Active   11d
kube-system         Active   11d
kubeapps            Active   11d
monitoring          Active   4d4h
kharbor             Terminating   5d5h
[root@master ]# kubectl edit ns kharbor
namespace/kharbor edited
[root@master ]# kubectl get ns
NAME                STATUS   AGE
cattle-logging      Active   2d21h
cattle-prometheus   Active   2d20h
cattle-system       Active   2d21h
default             Active   11d
fleet-system        Active   2d21h
kspark              Active   11d
kube-node-lease     Active   11d
kube-public         Active   11d
kube-system         Active   11d
kubeapps            Active   11d
monitoring          Active   4d4h
[root@master ]#

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总结：每当删除 namespace 或 pod 等一些 Kubernetes 资源时，有时资源状态会卡在 Terminating，很长时间无法删除，甚至有时增加 --force flag 之后还是无法正常删除。这时就需要 edit 该资源，将 finalizers 字段设置为 []，之后 Kubernetes 资源就正常删除了。

#K8s

上次更新: 2/7/2021, 4:29:58 PM

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