kubectl apply --dry-run=server & kubectl diff generate "Update of Deployment" messages

[ramnes]

Do you mean by "outputed" that it triggers messages? That's weird, because we have this: https://github.com/numberly/kubemen/blob/master/kubemen/app.py#L46

Maybe there's another field for diffs?

Depending on your needs, you could use kubectl apply --dry-run=server as a workaround.

[shnups]

Actually, i've just tested and both kubectl diff and kubectl apply --dry-run=server make kubemen generate "Update of Deployment" messages.

[ramnes]

That's weird. Is the admission webhook configured with sideEffects: NoneOnDryRun as seen here? Does Kubemen receive the dryRun flag as handled here?

Documentation you might be interested in:

• https://kubernetes.io/docs/reference/access-authn-authz/extensible-admission-controllers/#side-effects
• https://kubernetes.io/blog/2019/01/14/apiserver-dry-run-and-kubectl-diff/

[ramnes]

Probably an API change in Kubernetes, and if so we should check both places.