如何确定是什么创建了Kubernetes资源？

Question

我正在调试创建以下资源的内容：

$ kubectl get deploy -o=name | grep datadog
deployment.apps/datadog-cluster-agent
deployment.apps/datadog-kube-state-metrics

每次我删除它们时，都会在几秒钟内再次创建它们。

通过查看标签，我就可以看出它是由Helm管理的：

$ kubectl describe deploy/datadog-cluster-agent
Name:                   datadog-cluster-agent
Namespace:              default
CreationTimestamp:      Tue, 26 Jan 2021 18:56:51 -0800
Labels:                 app.kubernetes.io/instance=datadog
                        app.kubernetes.io/managed-by=Helm
                        app.kubernetes.io/name=datadog
                        app.kubernetes.io/version=7
                        contra.com/app-name=datadog
                        helm.sh/chart=datadog-2.7.0

但是，我很有信心，Helm甚至没有安装在集群上：

$ kubectl get all -A | grep helm
$ kubectl get all -A | grep tiller

How --我是否确定是什么创建了这个数据-- deployment --我删除它的时间？

进一步调试信息：

试图列出所有相关资源将提供：

$ kubectl get all -l app.kubernetes.io/instance=datadog
NAME                                              READY   STATUS    RESTARTS   AGE
pod/datadog-kube-state-metrics-55d9f8659f-5tqsl   1/1     Running   0          4m43s

NAME                                 TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)    AGE
service/datadog-cluster-agent        ClusterIP   10.0.14.155           5005/TCP   6h16m
service/datadog-kube-state-metrics   ClusterIP   10.0.2.87             8080/TCP   20d

NAME                     DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR            AGE
daemonset.apps/datadog   5         5         4       1            4           kubernetes.io/os=linux   3m45s

NAME                                         READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/datadog-cluster-agent        1/1     1            1           4m37s
deployment.apps/datadog-kube-state-metrics   1/1     1            1           4m43s

NAME                                                    DESIRED   CURRENT   READY   AGE
replicaset.apps/datadog-kube-state-metrics-55d9f8659f   1         1         1       4m43s

如果我使用kubectl delete all -l app.kubernetes.io/instance=datadog删除所有资源，它们将在几秒钟内再次重新创建。

Answer 1

您应该检查部署JSON或YAML定义。在元数据中，应该有一个ownerReference，例如：

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "1"
  creationTimestamp: "2021-01-12T08:34:06Z"
  generation: 1
  name: eventlistener
  namespace: ci
  ownerReferences:
  - apiVersion: triggers.tekton.dev/v1alpha1
    blockOwnerDeletion: true
    controller: true
    kind: EventListener
    name: github-listener
    uid: 54a7115e-565d-4239-b8fc-66e94c6c221b
spec:
...

当一个对象由另一个对象创建时，您应该找到那个ownerReference，告诉您该归咎于谁。