In-place Resource Resize for Kubernetes (> 1.27) Pods is not working through Java client

[chandragm]

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Describe the bug https://kubernetes.io/blog/2023/05/12/in-place-pod-resize-alpha/ In-place Resource Resize for Kubernetes (> 1.27) Pods is working when using the kubectl patch command as mentioned in the linked blog. Meaning the container's resources cpu/ memory get updated in-place without restarting or new containers being created.

I am following (https://kubernetes.io/docs/tasks/manage-kubernetes-objects/update-api-object-kubectl-patch/) to achieve similar functionality.

https://github.com/kubernetes-client/java/blob/master/examples/examples-release-18/src/main/java/io/kubernetes/client/examples/PatchExample.java

I tried PatchUtils.patch with V1Patch body: "[{ \"op\": \"replace\", \"path\": \"/spec/template/spec/containers/0/resources/limits/cpu\", \"value\": \"1\" }]" for PATCH_FORMAT_JSON_PATCH. From the documentation it says that the new pods will be created.

Would like to understand how to update in-place without the creation of new pods.

Client Version 20.0.1

Kubernetes Version Client Version: v1.29.2 Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3 Server Version: v1.28.3

Java Version Java 17

To Reproduce https://github.com/kubernetes-client/java/blob/master/examples/examples-release-18/src/main/java/io/kubernetes/client/examples/PatchExample.java

Try any of the patch deployment variations and you should see the pods getting created anew. Instead the pod spec has to be updated in-place.

Expected behavior Pods should not get created anew but the cpu/memory resource requests and limits get updated in-place.

KubeConfig apiVersion: apps/v1 kind: Deployment metadata: name: inplacedemo spec: replicas: 1 selector: matchLabels: app: inplacedemo template: metadata: labels: app: inplacedemo spec: containers: - name: inplacedemo image: alpine command: ["tail", "-f", "/dev/null"] resizePolicy: - resourceName: "memory" restartPolicy: "RestartContainer" resources: limits: cpu: 2 memory: "1Gi" requests: cpu: 1 memory: "500Mi"

Server (please complete the following information):

• OS: Mac
• Environment : Local Minikube cluster
• Cloud : NA

Additional context I would like to achieve the equivalent of https://kubernetes.io/blog/2023/05/12/in-place-pod-resize-alpha/ using the java client.