chore(vm): reduce noise in logs about "namespaces not found"

[diafour]

Description

Do not requeue reconcile if status was not updated with error "namespaces ... not found". Just print Warning in this situation.

Why do we need it, and what problem does it solve?

This situation is not an error, but it fails e2e tests with this messages:

  this is the `Virtualization-controller` error! not the current `Ginkgo` context error:
  {
    "level": "error",
    "msg": "Failed to update resource",
    "err": "error updating status subresource: namespaces \"dvp-e2e-m-sds-20251008-145944-724\" not found",
    "controller": "vm-controller",
    "handler": "",
    "ds": "",
    "collector": "",
    "name": "x-559ce0-worker-afad0dff-t78m8-hmnl8",
    "namespace": "dvp-e2e-m-sds-20251008-145944-724",
    "reconcileID": "d2587a50-d711-47b6-83a7-ff620e39706f",
    "time": "2025-10-13T02:03:39Z"
  }
  

What is the expected result?

Reduce number of false-negative e2e runs.

Checklist

• [ ] The code is covered by unit tests.
• [ ] e2e tests passed.
• [ ] Documentation updated according to the changes.
• [ ] Changes were tested in the Kubernetes cluster manually.

Changelog entries

section: vm
type: chore
summary: Reduce noise in logs about "namespaces not found".

[sourcery-ai[bot]]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Introduce a new branch in the reconcile handler that intercepts namespace-not-found errors, logs them as warnings, and suppresses requeueing, reducing log noise during e2e tests.

Sequence diagram for updated error handling in VM reconcile process

sequenceDiagram
participant Controller
participant Logger
participant KubernetesAPI
Controller->KubernetesAPI: Update resource status
KubernetesAPI-->>Controller: Error (namespace not found)
Controller->Logger: Warn("Namespace is gone while reconcile the object")
Note over Controller: No requeue triggered

Class diagram for updated error handling in Reconciler

classDiagram
class Reconciler {
  +reconcile()
}
Reconciler : +handlersLoop
Reconciler : -case k8serrors.IsNotFound(err) && strings.Contains(err.Error(), "namespaces")
Reconciler : +Warn("Namespace is gone while reconcile the object")

File-Level Changes

Change	Details	Files
Add conditional handling for namespace-not-found errors to log a warning and skip requeue	Added a new case checking for k8serrors.IsNotFound(err) && error message containing "namespaces" Replaced error log with logger.Warn for this specific condition Removed explicit requeue or error accumulation when namespace is gone	images/virtualization-artifact/pkg/controller/reconciler/reconciler.go

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[diafour]

Warning is not enough here. May be we should add metric and alert for such cases.

The problem was that VM stuck in Terminating state but NS was forced to delete.