介绍
最近一直在玩 EKS（Elastic Kubernetes Service -- Amazon EKS） 和 KubeSphere。 因为之前没有使用过 EKS 和 KubeSphere，所以这个过程也是一个试错的过程，在我使用 KubeSphere 的时候发现有一个日志服务，在好奇心的驱使下，我创建了它。
在我创建了日志服务（KubeSphere Logging System）以后，我发现我并不想使用它。（可能我只是想看看它到底是什么吧。）强迫症的我就想把它给删除掉。于是我在我的 EKS 中对他进行了强制删除：
$ kubectl delete ns kubesphere-logging-system --force --grace-period=0
让人尴尬的是，这个 Namespace 并没有立马删除，我自我安慰道，可能 Namespace 下边有其他没有删除的资源在等待删除，我再等等。。。
过了半个小时，再次查看删除进度：
$ kubectl get ns kubesphere-logging-system
NAME STATUS AGE
kubesphere-logging-system Terminating 6d19h
它好像这地卡在了 Terminating 的状态。我试着寻找解决方法，参考这个 issue： https://github.com/kubernetes/kubernetes/issues/60807。但是这种方法要通过 API 才可以实现。EKS 是托管在 AWS 中的，我根本没有办法去操作 EKS 的后台。
终于我在这个 issue 中找到了答案： https://github.com/kubernetes/kubernetes/issues/60807#issuecomment-663853215
如何彻底删除 namespace
获取 namespace 的详情信息并转为 json
$ kubectl get namespace kubesphere-logging-system -o json > kubesphere-logging-system.json
打开 json 文件编辑
{
"apiVersion": "v1",
"kind": "Namespace",
"metadata": {
"creationTimestamp": "2021-12-31T05:03:58Z",
"deletionTimestamp": "2022-01-05T08:05:40Z",
"labels": {
"kubesphere.io/namespace": "kubesphere-logging-system",
"kubesphere.io/workspace": "system-workspace"
},
"managedFields": [
{
"apiVersion": "v1",
"fieldsType": "FieldsV1",
"fieldsV1": {
"f:metadata": {
"f:labels": {
".": {},
"f:kubesphere.io/namespace": {}
},
"f:ownerReferences": {
".": {},
"k:{\"uid\":\"6d535470-2592-4f3c-a155-eabc362c339d\"}": {
".": {},
"f:apiVersion": {},
"f:blockOwnerDeletion": {},
"f:controller": {},
"f:kind": {},
"f:name": {},
"f:uid": {}
}
}
}
},
"manager": "controller-manager",
"operation": "Update",
"time": "2021-12-31T05:04:01Z"
},
{
"apiVersion": "v1",
"fieldsType": "FieldsV1",
"fieldsV1": {
"f:metadata": {
"f:labels": {
"f:kubesphere.io/workspace": {}
}
},
"f:status": {
"f:phase": {}
}
},
"manager": "kubectl",
"operation": "Update",
"time": "2021-12-31T05:04:01Z"
},
{
"apiVersion": "v1",
"fieldsType": "FieldsV1",
"fieldsV1": {
"f:status": {
"f:conditions": {
".": {},
"k:{\"type\":\"NamespaceContentRemaining\"}": {
".": {},
"f:lastTransitionTime": {},
"f:message": {},
"f:reason": {},
"f:status": {},
"f:type": {}
},
"k:{\"type\":\"NamespaceDeletionContentFailure\"}": {
".": {},
"f:lastTransitionTime": {},
"f:message": {},
"f:reason": {},
"f:status": {},
"f:type": {}
},
"k:{\"type\":\"NamespaceDeletionDiscoveryFailure\"}": {
".": {},
"f:lastTransitionTime": {},
"f:message": {},
"f:reason": {},
"f:status": {},
"f:type": {}
},
"k:{\"type\":\"NamespaceDeletionGroupVersionParsingFailure\"}": {
".": {},
"f:lastTransitionTime": {},
"f:message": {},
"f:reason": {},
"f:status": {},
"f:type": {}
},
"k:{\"type\":\"NamespaceFinalizersRemaining\"}": {
".": {},
"f:lastTransitionTime": {},
"f:message": {},
"f:reason": {},
"f:status": {},
"f:type": {}
}
}
}
},
"manager": "kube-controller-manager",
"operation": "Update",
"time": "2022-01-05T08:05:47Z"
}
],
"name": "kubesphere-logging-system",
"ownerReferences": [
{
"apiVersion": "tenant.kubesphere.io/v1alpha1",
"blockOwnerDeletion": true,
"controller": true,
"kind": "Workspace",
"name": "system-workspace",
"uid": "6d535470-2592-4f3c-a155-eabc362c339d"
}
],
"resourceVersion": "7376520",
"uid": "2b76e9b1-75f2-4a2e-a819-73b36aea188e"
},
"spec": {
"finalizers": [
"kubernetes" # 将此行删除
]
},
"status": {
"conditions": [
{
"lastTransitionTime": "2022-01-05T08:05:47Z",
"message": "All resources successfully discovered",
"reason": "ResourcesDiscovered",
"status": "False",
"type": "NamespaceDeletionDiscoveryFailure"
},
{
"lastTransitionTime": "2022-01-05T08:05:47Z",
"message": "All legacy kube types successfully parsed",
"reason": "ParsedGroupVersions",
"status": "False",
"type": "NamespaceDeletionGroupVersionParsingFailure"
},
{
"lastTransitionTime": "2022-01-05T08:05:47Z",
"message": "All content successfully deleted, may be waiting on finalization",
"reason": "ContentDeleted",
"status": "False",
"type": "NamespaceDeletionContentFailure"
},
{
"lastTransitionTime": "2022-01-05T08:05:47Z",
"message": "Some resources are remaining: fluentbits.logging.kubesphere.io has 1 resource instances",
"reason": "SomeResourcesRemain",
"status": "True",
"type": "NamespaceContentRemaining"
},
{
"lastTransitionTime": "2022-01-05T08:05:47Z",
"message": "Some content in the namespace has finalizers remaining: fluentbit.logging.kubesphere.io in 1 resource instances",
"reason": "SomeFinalizersRemain",
"status": "True",
"type": "NamespaceFinalizersRemaining"
}
],
"phase": "Terminating"
}
}
找到 spec 将 finalizers 下的 kubernetes 删除。
具体如下
{
"apiVersion": "v1",
"kind": "Namespace",
"metadata": {
"creationTimestamp": "2021-12-31T05:03:58Z",
"deletionTimestamp": "2022-01-05T08:05:40Z",
"labels": {
"kubesphere.io/namespace": "kubesphere-logging-system",
"kubesphere.io/workspace": "system-workspace"
},
"managedFields": [
{
"apiVersion": "v1",
"fieldsType": "FieldsV1",
"fieldsV1": {
"f:metadata": {
"f:labels": {
".": {},
"f:kubesphere.io/namespace": {}
},
"f:ownerReferences": {
".": {},
"k:{\"uid\":\"6d535470-2592-4f3c-a155-eabc362c339d\"}": {
".": {},
"f:apiVersion": {},
"f:blockOwnerDeletion": {},
"f:controller": {},
"f:kind": {},
"f:name": {},
"f:uid": {}
}
}
}
},
"manager": "controller-manager",
"operation": "Update",
"time": "2021-12-31T05:04:01Z"
},
{
"apiVersion": "v1",
"fieldsType": "FieldsV1",
"fieldsV1": {
"f:metadata": {
"f:labels": {
"f:kubesphere.io/workspace": {}
}
},
"f:status": {
"f:phase": {}
}
},
"manager": "kubectl",
"operation": "Update",
"time": "2021-12-31T05:04:01Z"
},
{
"apiVersion": "v1",
"fieldsType": "FieldsV1",
"fieldsV1": {
"f:status": {
"f:conditions": {
".": {},
"k:{\"type\":\"NamespaceContentRemaining\"}": {
".": {},
"f:lastTransitionTime": {},
"f:message": {},
"f:reason": {},
"f:status": {},
"f:type": {}
},
"k:{\"type\":\"NamespaceDeletionContentFailure\"}": {
".": {},
"f:lastTransitionTime": {},
"f:message": {},
"f:reason": {},
"f:status": {},
"f:type": {}
},
"k:{\"type\":\"NamespaceDeletionDiscoveryFailure\"}": {
".": {},
"f:lastTransitionTime": {},
"f:message": {},
"f:reason": {},
"f:status": {},
"f:type": {}
},
"k:{\"type\":\"NamespaceDeletionGroupVersionParsingFailure\"}": {
".": {},
"f:lastTransitionTime": {},
"f:message": {},
"f:reason": {},
"f:status": {},
"f:type": {}
},
"k:{\"type\":\"NamespaceFinalizersRemaining\"}": {
".": {},
"f:lastTransitionTime": {},
"f:message": {},
"f:reason": {},
"f:status": {},
"f:type": {}
}
}
}
},
"manager": "kube-controller-manager",
"operation": "Update",
"time": "2022-01-05T08:05:47Z"
}
],
"name": "kubesphere-logging-system",
"ownerReferences": [
{
"apiVersion": "tenant.kubesphere.io/v1alpha1",
"blockOwnerDeletion": true,
"controller": true,
"kind": "Workspace",
"name": "system-workspace",
"uid": "6d535470-2592-4f3c-a155-eabc362c339d"
}
],
"resourceVersion": "7376520",
"uid": "2b76e9b1-75f2-4a2e-a819-73b36aea188e"
},
"spec": {
"finalizers": [
]
},
"status": {
"conditions": [
{
"lastTransitionTime": "2022-01-05T08:05:47Z",
"message": "All resources successfully discovered",
"reason": "ResourcesDiscovered",
"status": "False",
"type": "NamespaceDeletionDiscoveryFailure"
},
{
"lastTransitionTime": "2022-01-05T08:05:47Z",
"message": "All legacy kube types successfully parsed",
"reason": "ParsedGroupVersions",
"status": "False",
"type": "NamespaceDeletionGroupVersionParsingFailure"
},
{
"lastTransitionTime": "2022-01-05T08:05:47Z",
"message": "All content successfully deleted, may be waiting on finalization",
"reason": "ContentDeleted",
"status": "False",
"type": "NamespaceDeletionContentFailure"
},
{
"lastTransitionTime": "2022-01-05T08:05:47Z",
"message": "Some resources are remaining: fluentbits.logging.kubesphere.io has 1 resource instances",
"reason": "SomeResourcesRemain",
"status": "True",
"type": "NamespaceContentRemaining"
},
{
"lastTransitionTime": "2022-01-05T08:05:47Z",
"message": "Some content in the namespace has finalizers remaining: fluentbit.logging.kubesphere.io in 1 resource instances",
"reason": "SomeFinalizersRemain",
"status": "True",
"type": "NamespaceFinalizersRemaining"
}
],
"phase": "Terminating"
}
}
执行清理命令
现在我们只需要一条命令，就可以彻底删除这个 Namespace。
$ kubectl replace --raw "/api/v1/namespaces/kubesphere-logging-system/finalize" -f ./kubesphere-logging-system.json
执行完以后，你需要等待一会，再次执行命令检查 Namespace。
$ kubectl replace --raw "/api/v1/namespaces/kubesphere-logging-system/finalize" -f ./kubesphere-logging-system.json
最后的检查
$ kubectl get ns kubesphere-logging-system
Error from server (NotFound): namespaces "kubesphere-logging-system" not found
$ kubectl get ns
NAME STATUS AGE
default Active 23d
kubesphere-controls-system Active 9d
kubesphere-devops-system Active 9d
kubesphere-devops-worker Active 16h
kubesphere-monitoring-federated Active 9d
kubesphere-monitoring-system Active 9d
kubesphere-sample-dev Active 8d
kubesphere-system Active 9d
再次查看的时候，它已经不存在了。
