apply kubectl vs create kubectl?

Question

In the documentation, I realized that kubectl apply = kubectl create + kubectl replace . Link

As far as I understand, if I want to create a new k8s resource in a cluster, I should use the kubectl create operation . Now, if I want to update something in k8s live resources, I have to use the kubectl replace operation .

If I want to perform both operations (create a new k8s resource, as well as update k8s live resources), I must use the kubectl apply operation

My questions are: why are there three operations in a cluster to perform the same task? What are the use cases for these operations? How do they differ from each other under the hood?

I am currently using kubectl create to create new resources in the cluster. thank

Answer 1

These are two different approaches. kubectl create- this is what we call imperative management . With this approach, you tell the Kubernetes API what you want to create, replace, or delete, and not how you want your K8s cluster world to look.

kubectl apply , , , , (.. scale), , apply .

Kubernetes Object Management.

Answer 2

CI , create , .

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kubectl create whatever --dry-run=true -o yaml | kubectl apply -f -

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Answer 3

, :

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create -


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apply create , Ingress Controller , .

Answer 4

, kubectl apply.

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Answer 5

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kubectl run = kubectl create deployment

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kubectl create -f your-object-config.yaml

kubectl delete -f your-object-config.yaml

kubectl replace -f your-object-config.yaml

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kubectl diff -f configs/

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Answer 6

kubectl create .

kubectl -f | URL

kubectl apply , yaml. . . kubectl apply -f /

:
https://kubernetes.io/docs/tasks/manage-kubernetes-objects/declarative-config/ https://kubernetes.io/docs/tasks/manage-kubernetes-objects/imperative-config/