解决使用json配置文件删除k8s中namespace解析json报错的问题

报错提示如下：

C:\Users\jiangcheng>curl -k -H "Content-Type: application/json" -X PUT --data-binary @dev.json http://127.0.0.1:8081/api/v1/namespaces/dev/finalize { "kind": "Status", "apiVersion": "v1", "metadata": { }, "status": "Failure", "message": "the object provided is unrecognized (must be of type Namespace): couldn't get version/kind; json parse error: invalid character 'ÿ' looking for beginning of value (fffe7b000d000a0020002000200020002200610070006900560065007200 ...)", "reason": "BadRequest", "code": 400 }

解决方案：

参考github的issue，考虑是json的问题，建议是重新生成

Couldn't get version/kind; json parse error: unexpected end of JSON input · Issue #14396 · openshift/origin · GitHub

那就重新生成json，再执行吧

C:\Users\jiangcheng>rm dev01.json 'rm' is not recognized as an internal or external command, operable program or batch file. C:\Users\jiangcheng>del dev01.json C:\Users\jiangcheng>ls 'ls' is not recognized as an internal or external command, operable program or batch file. C:\Users\jiangcheng>curl -k -H "Content-Type:application/json" -X PUT --data-binary "@dev0001.json" http://127.0.0.1:8081/api/v1/namespaces/dev/finalize { "kind": "Status", "apiVersion": "v1", "metadata": { }, "status": "Failure", "message": "the object provided is unrecognized (must be of type Namespace): couldn't get version/kind; json parse error: invalid character 'ÿ' looking for beginning of value (fffe7b000d000a0020002000200020002200610070006900560065007200 ...)", "reason": "BadRequest", "code": 400 }

如文档所示，出现了问题

invalid character 'ÿ' looking for beginning of value (fffe7b000d000a0020002000200020002200610070006900560065007200 ...)

解决这个问题，先排查json文件的编码问题，参考 powershell 将txt文件从UTF-8转换为ASCII的简单方法 _大数据知识库

解决方案如下：

C:\Users\jiangcheng> (Get-Content -Raw "./dev0001.json") -cmatch '\P{IsBasicLatin}' False C:\Users\jiangcheng> (Get-Content -Raw ./dev0001.json) -cmatch '\P{IsBasicLatin}' False C:\Users\jiangcheng> 'café' | Out-File -Encoding Ascii temp05121830.txt C:\Users\jiangcheng> cat .\temp05121830.txt caf? C:\Users\jiangcheng> (Get-Content -Raw temp05121830.txt) -cmatch '\P{IsBasicLatin}' False C:\Users\jiangcheng> Get-Content -Path "./temp05121830.txt" | Out-File -FilePath "./temp05121830.txt" -Encoding ASCII C:\Users\jiangcheng> (Get-Content -Raw temp05121830.txt) -cmatch '\P{IsBasicLatin}' C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng> (Get-Content -Raw ./dev0001.json) -cmatch '\P{IsBasicLatin}' False C:\Users\jiangcheng> Get-Content -Path "./dev0001.json" | Out-File -FilePath "./dev0002.json" -Encoding ASCII C:\Users\jiangcheng> (Get-Content -Path "./dev0002.json") -cmatch '\P{IsBasicLatin}' C:\Users\jiangcheng>

再执行命令

curl -k -H "Content-Type:application/json" -X PUT --data-binary "@dev0002.json" http://127.0.0.1:8081/api/v1/namespaces/dev/finalize

结果如下，改动是有效果的

执行

kubectl get ns

结果如图所示，

结果没有什么改变，说明删除namespace不成功，返回查看可能是命令行的问题，文件名使用了字符串，而字符串不是json，即使没有报错，仍然是不生效的，所以准备改为转义字符

curl -k -H "Content-Type:application/json" -X PUT --data-binary `@dev0002.json http://127.0.0.1:8081/api/v1/namespaces/dev/finalize

执行之后，报错如下所示

C:\Users\jiangcheng>curl -k -H "Content-Type:application/json" -X PUT --data-binary `@dev0002.json http://127.0.0.1:8081/api/v1/namespaces/dev/finalize { "kind": "Status", "apiVersion": "v1", "metadata": { }, "status": "Failure", "message": "the object provided is unrecognized (must be of type Namespace): couldn't get version/kind; json parse error: invalid character '`' looking for beginning of value (6040646576303030322e6a736f6e)", "reason": "BadRequest", "code": 400 }

这次报错提示的是转义字符的问题，需要修改转义字符，指令如下

curl -k -H "Content-Type:application/json" -X PUT --data-binary @dev0002.json http://127.0.0.1:8081/api/v1/namespaces/dev/finalize

执行效果如下

C:\Users\jiangcheng>curl -k -H "Content-Type:application/json" -X PUT --data-binary @dev0002.json http://127.0.0.1:8081/api/v1/namespaces/dev/finalize { "kind": "Status", "apiVersion": "v1", "metadata": { }, "status": "Failure", "message": "Operation cannot be fulfilled on namespaces \"dev\": the object has been modified; please apply your changes to the latest version and try again", "reason": "Conflict", "details": { "name": "dev", "kind": "namespaces" }, "code": 409 }

再修改一下 json文件，修改之前

{ "apiVersion": "v1", "kind": "Namespace", "metadata": { "creationTimestamp": "2023-05-12T02:09:08Z", "labels": { "kubernetes.io/metadata.name": "dev" }, "name": "dev", "resourceVersion": "24023", "uid": "51588156-1758-4f51-a7de-f63febda769c" }, "spec": { }, "status": { "phase": "Active" } }

其中的 spec 字段是已经修改过的，现在将这个字段删除，再试试看

执行之后还是报这个错

根据建议重新生成，并删除spec试试

{ "apiVersion": "v1", "kind": "Namespace", "metadata": { "creationTimestamp": "2023-05-12T02:09:08Z", "labels": { "kubernetes.io/metadata.name": "dev" }, "name": "dev", "resourceVersion": "62580", "uid": "51588156-1758-4f51-a7de-f63febda769c" }, "status": { "phase": "Active" } }

执行命令结果如下：

C:\Users\jiangcheng>kubectl get namespace dev -o json > dev.json C:\Users\jiangcheng>notepad dev.json C:\Users\jiangcheng>notepad dev.json C:\Users\jiangcheng>curl -k -H "Content-Type: application/json" -X PUT --data-binary @dev.json http://127.0.0.1:8001/api/v1/namespaces/dev/finalize curl: (7) Failed to connect to 127.0.0.1 port 8001 after 2048 ms: Couldn't connect to server C:\Users\jiangcheng>curl -k -H "Content-Type: application/json" -X PUT --data-binary @dev.json http://127.0.0.1:8081/api/v1/namespaces/dev/finalize { "kind": "Namespace", "apiVersion": "v1", "metadata": { "name": "dev", "uid": "51588156-1758-4f51-a7de-f63febda769c", "resourceVersion": "62580", "creationTimestamp": "2023-05-12T02:09:08Z", "labels": { "kubernetes.io/metadata.name": "dev" }, "managedFields": [ { "manager": "kubectl-create", "operation": "Update", "apiVersion": "v1", "time": "2023-05-12T02:09:08Z", "fieldsType": "FieldsV1", "fieldsV1": {"f:metadata":{"f:labels":{".":{},"f:kubernetes.io/metadata.name":{}}}} } ] }, "spec": { }, "status": { "phase": "Active" } }

执行结果，ns没有被删除

为什么执行成功了，但是namespace仍然没有被删除呢？我判断是状态的原因，因为状态仍然是Active，所以没有被删除掉

接下来，先执行删除命令

kubectl delete namespace dev

执行结果果然是卡住了

这个状态卡住了半天，再执行远程强制删除的命令，结果冲突了

最终我决定重新生成json，并重新执行整个删除操作，先查看namespace的状态，如下

kubectl get ns

状态如图所示

可以看到dev是Terminating的状态，可删除，重新生成json再执行

C:\Users\jiangcheng>del dev.json C:\Users\jiangcheng> C:\Users\jiangcheng>kubectl get namespace dev -o json > dev.json C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng>notepad dev.json C:\Users\jiangcheng>curl -k -H "Content-Type: application/json" -X PUT --data-binary @dev.json http://127.0.0.1:8081/api/v1/namespaces/dev/finalize { "kind": "Namespace", "apiVersion": "v1", "metadata": { "name": "dev", "uid": "51588156-1758-4f51-a7de-f63febda769c", "resourceVersion": "66013", "creationTimestamp": "2023-05-12T02:09:08Z", "deletionTimestamp": "2023-05-12T11:20:37Z", "labels": { "kubernetes.io/metadata.name": "dev" }, "managedFields": [ { "manager": "kubectl-create", "operation": "Update", "apiVersion": "v1", "time": "2023-05-12T02:09:08Z", "fieldsType": "FieldsV1", "fieldsV1": {"f:metadata":{"f:labels":{".":{},"f:kubernetes.io/metadata.name":{}}}} } ] }, "spec": { }, "status": { "phase": "Terminating" } } C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng> C:\Users\jiangcheng>kubectl get ns NAME STATUS AGE default Active 24h ingress-nginx Active 24h kube-node-lease Active 24h kube-public Active 24h kube-system Active 24h local-path-storage Active 24h

可以看到这次删除终于成功了