kubernete強力刪除namespace

問題描述

在k8s中，有些namespace創建之後，覺得不需要了，想刪除掉，但怎麼都刪不掉。類似於下圖，即使用delete --force命令也刪不掉，這些ns最終還是現實爲terminating狀態。

解決辦法

1. 將該namespace導出爲json格式。

   kubectl get ns redis -o json > tmp.json
   

2. 編輯該json，去除掉spec部分。

vim tmp.json
# 原始數據
{
    "apiVersion": "v1",
    "kind": "Namespace",
    "metadata": {
        "annotations": {
            "cattle.io/status": "{\"Conditions\":[{\"Type\":\"InitialRolesPopulated\",\"Status\":\"True\",\"Message\":\"\",\"LastUpdateTime\":\"2020-05-15T03:14:31Z\"},{\"Type\":\"ResourceQuotaInit\",\"Status\":\"True\",\"Message\":\"\",\"LastUpdateTime\":\"2020-05-15T03:14:30Z\"}]}",
            "field.cattle.io/creatorId": "user-gpdkw",
            "field.cattle.io/projectId": "c-bz2b7:p-w5xc9",
            "lifecycle.cattle.io/create.namespace-auth": "true"
        },
        "creationTimestamp": "2020-05-15T03:05:12Z",
        "deletionTimestamp": "2020-05-15T03:13:31Z",
        "labels": {
            "cattle.io/creator": "norman",
            "field.cattle.io/projectId": "p-w5xc9"
        },
        "name": "redis",
        "resourceVersion": "29284653",
        "selfLink": "/api/v1/namespaces/redis",
        "uid": "e4763eae-9658-11ea-b716-000c291a5adf"
    },
    #刪除掉spec包裹的部分
    "spec": {
        "finalizers": [
            "kubernetes"
        ]
    },
    "status": {
        "phase": "Terminating"
    }
}
# 修改後的數據

{
    "apiVersion": "v1",
    "kind": "Namespace",
    "metadata": {
        "annotations": {
            "cattle.io/status": "{\"Conditions\":[{\"Type\":\"InitialRolesPopulated\",\"Status\":\"True\",\"Message\":\"\",\"LastUpdateTime\":\"2020-05-15T03:14:31Z\"},{\"Type\":\"ResourceQuotaInit\",\"Status\":\"True\",\"Message\":\"\",\"LastUpdateTime\":\"2020-05-15T03:14:30Z\"}]}",
            "field.cattle.io/creatorId": "user-gpdkw",
            "field.cattle.io/projectId": "c-bz2b7:p-w5xc9",
            "lifecycle.cattle.io/create.namespace-auth": "true"
        },
        "creationTimestamp": "2020-05-15T03:05:12Z",
        "deletionTimestamp": "2020-05-15T03:13:31Z",
        "labels": {
            "cattle.io/creator": "norman",
            "field.cattle.io/projectId": "p-w5xc9"
        },
        "name": "redis",
        "resourceVersion": "29284653",
        "selfLink": "/api/v1/namespaces/redis",
        "uid": "e4763eae-9658-11ea-b716-000c291a5adf"
    },
    "spec": {
    },
    "status": {
        "phase": "Terminating"
    }
}

3. 將該修改應用到apiserver中。

# 打開一個終端，開啓proxy。不然要經過API server的驗證。
kubectl proxy
# 向開放的端口提交修改後的json。
curl -k -H "Content-Type: application/json" -X PUT --data-binary @tmp.json 127.0.0.1:8001/api/v1/namespaces/redis/finalize
# 查看是否應用成功
kubectl get ns