Fix finalizer processing #3180
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Fix finalizer processing #3180
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This is an improvement, but it's not perfect... there's still a race condition. |
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There are two reconcilers for the CSV, one is controller-runtime based, the other is based on queueinformer. A finalizer was added to the CSV and it's handled by the controller-runtime reconciler. However, the queueinformer-based reconciler may take a while to do its processing such that the CSV may be deleted and the finalizer run via the controller-runtime reconciler. (This still takes <1s.) This causes problems when CSV being synced is deleted. The queueinformer attempts to sync RBAC to the stale CSV. The proper (BIG/risky) fix is to consolidate the two reconcilers. A less risky fix is to move the finalizer to the queueinformer reconciler and query the lister cache to see if the CSV has been deleted, and not do the RBAC updates if that's the case. Signed-off-by: Todd Short <todd.short@me.com>
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kevinrizza
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Feb 27, 2024
| @@ -1093,6 +1095,9 @@ func (a *Operator) handleClusterServiceVersionDeletion(obj interface{}) { | |||
| "phase": clusterServiceVersion.Status.Phase, | |||
| }) | |||
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| logger.Debug("start deleting CSV") | |||
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They are useful in tracking what's happening; this one is debug, so it doesn't clutter the log normally.
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Are you asking me to get rid of the extra logs?
| return nil, false | ||
| } | ||
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| log.Info("started finalizer") |
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This one is Info, however.
| @@ -100,10 +95,6 @@ func (r *OperatorConditionGeneratorReconciler) Reconcile(ctx context.Context, re | |||
| return ctrl.Result{}, client.IgnoreNotFound(err) | |||
| } | |||
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| if err, ok := r.processFinalizer(ctx, in); !ok { | |||
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Do you know why we were doing this here?
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At the time, it was the easier location to put the finalizer, since it was the controller-runtime reconciler. But that reconciler didn't manage the RBAC, which caused this race condition. Moving it to the queueinformer reconciler is the proper place for it. It's easier than combining the reconcilers.
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ping @kevinrizza ? |
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/approve |
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Feb 28, 2024
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Description of the change:
Handle CSV deletion during sync.
Motivation for the change:
There are two reconcilers for the CSV, one is controller-runtime based,
the other is based on queueinformer. A finalizer was added to the CSV
and it's handled by the controller-runtime reconciler.
However, the queueinformer-based reconciler may take a while to do its
processing such that the CSV may be deleted and the finalizer run via
the controller-runtime reconciler. (This still takes <1s.)
This causes problems when CSV being synced is deleted. The queueinformer
attempts to sync RBAC to the stale CSV. The proper (BIG/risky) fix is to
consolidate the two reconcilers. A less risky fix is to query the lister
cache to see if the CSV has been deleted (or has a DeletionTimestamp),
and not do the RBAC updates if that's the case.
Architectural changes:
None.
Testing remarks:
Reviewer Checklist
/doc[FLAKE]are truly flaky and have an issue