How to update or patch a k8s resource ?

[AllenZMC]

How to update or patch a k8s resource ? For example, pod or service , etc.

[rohanKanojia]

Patching

We support full resource patching like this:

client.pods().inNamespace(namespace).withName(podName).patch(updatedPod);

We do have plans to support Strategic merge/JSON patches in upcoming releases(#2645)

Update

Updating can be done something like this:

client.pods().inNamespace("default").withName("foo")
     .edit()
         .editMetadata().addToAnnotations("new", "update").endMetadata()
     .done();

Note: This has been changed in 5.x versions of client, See Migration guide

[AllenZMC]

Thanks! @rohanKanojia

[AllenZMC]

Create or Replace some Pod with some existing object: client.pods().inNamespace("default").createOrReplace(aPod)
What does this mean and when is it used?

[rohanKanojia]

createOrReplace() somewhat similar to kubectl apply, but there is a difference. It doesn't ignore PUT when you try to issue createOrReplace() multiple times on a same resource (#2454 ). You would want to use it for creating resources if you're not sure if it already exists in the cluster not.