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Merge pull request #30982 from KimDoubleB/cascade-default-background 

Update `cascade` default value to background
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Kubernetes Prow Robot 2022-01-25 08:16:31 -08:00 committed by GitHub
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content/en/blog/_posts/2021-05-14-using-finalizers-to-control-deletion.md
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@ -190,7 +190,8 @@ kubectl get configmap
No resources found in default namespace.
```
To sum things up, when there's an override owner reference from a child to a parent, deleting the parent deletes the children automatically. This is called `cascade`. The default for cascade is `true`, however, you can use the --cascade=orphan option for `kubectl delete` to delete an object and orphan its children.
To sum things up, when there's an override owner reference from a child to a parent, deleting the parent deletes the children automatically. This is called `cascade`. The default for cascade is `true`, however, you can use the --cascade=orphan option for `kubectl delete` to delete an object and orphan its children. *Update: starting with kubectl v1.20, the default for cascade is `background`.*
In the following example, there is a parent and a child. Notice the owner references are still included. If I delete the parent using --cascade=orphan, the parent is deleted but the child still exists: