Add exponential backoff for CloudStorage status update failures

[Copilot]

Problem

The CloudStorage controller was not applying exponential backoff when status updates failed at the end of the reconciliation process. When b.Client.Status().Update(ctx, &bucket) failed, the error was only logged and the controller returned success (ctrl.Result{}, nil), which prevented controller-runtime's exponential backoff mechanism from being triggered.

This could result in status conditions remaining in incorrect states if status updates consistently failed, as the controller would not retry with increasing delays.

Solution

Modified the final status update error handling in cloudstorage_controller.go to return the error instead of just logging it:

Before:

if err := b.Client.Status().Update(ctx, &bucket); err != nil {
    logger.Error(err, "failed to update CloudStorage status")
}
return ctrl.Result{}, nil

After:

if err := b.Client.Status().Update(ctx, &bucket); err != nil {
    logger.Error(err, "failed to update CloudStorage status")
    // Return error to trigger exponential backoff for status update failures
    return ctrl.Result{}, err
}
return ctrl.Result{}, nil

This change ensures that status update failures trigger controller-runtime's built-in exponential backoff mechanism (5ms initial → 1000s maximum), consistent with the pattern used elsewhere in the controller for bucket operation failures.

Testing

• Added a documentation test explaining the change and expected behavior
• Verified all existing CloudStorage controller tests continue to pass
• Confirmed the change follows the established pattern used throughout the codebase

Related

Addresses feedback from PR openshift#1937 discussion comment: openshift#1937 (comment)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• openshift-velero-plugin-s3-auto-region-test-1.s3.us-east-1.amazonaws.com
  • Triggering command: /tmp/go-build75824382/b1625/controller.test -test.paniconexit0 -test.gocoverdir=/tmp/go-build75824382/b1625/gocoverdir -test.timeout=10m0s -test.coverprofile=/tmp/go-build75824382/b1625/_cover_.out (dns block)
  • Triggering command: /tmp/go-build75824382/b1646/aws.test -test.paniconexit0 -test.gocoverdir=/tmp/go-build75824382/b1646/gocoverdir -test.timeout=10m0s -test.coverprofile=/tmp/go-build75824382/b1646/_cover_.out (dns block)
• openshift-velero-plugin-s3-auto-region-test-2.s3.us-east-1.amazonaws.com
  • Triggering command: /tmp/go-build75824382/b1646/aws.test -test.paniconexit0 -test.gocoverdir=/tmp/go-build75824382/b1646/gocoverdir -test.timeout=10m0s -test.coverprofile=/tmp/go-build75824382/b1646/_cover_.out (dns block)
• openshift-velero-plugin-s3-auto-region-test-3.s3.us-east-1.amazonaws.com
  • Triggering command: /tmp/go-build75824382/b1646/aws.test -test.paniconexit0 -test.gocoverdir=/tmp/go-build75824382/b1646/gocoverdir -test.timeout=10m0s -test.coverprofile=/tmp/go-build75824382/b1646/_cover_.out (dns block)
• openshift-velero-plugin-s3-auto-region-test-4.s3.us-east-1.amazonaws.com
  • Triggering command: /tmp/go-build75824382/b1646/aws.test -test.paniconexit0 -test.gocoverdir=/tmp/go-build75824382/b1646/gocoverdir -test.timeout=10m0s -test.coverprofile=/tmp/go-build75824382/b1646/_cover_.out (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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