feat: client cache for configurable list of gvks#1042
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mblos
marked this pull request as ready for review
July 16, 2026 08:11
mblos
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auhlig,
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July 16, 2026 08:11
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Very nice work :) some first comments (still not completed with reviewing)
| // overlayList merges the overlay entries for the GVK into the informer result, | ||
| // deduplicating by objectKey (overlay wins), dropping tombstones, and filtering | ||
| // overlay-only entries against the list options' label and field selectors. | ||
| func (o *overlay) overlayList(gvk schema.GroupVersionKind, existing []runtime.Object, lo *client.ListOptions) []runtime.Object { |
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If a write changes an indexed field, the inner List filters against the informer (old value), then overlayList silently replaces the object with the new version.
Example: informer has spec.hostName=host-A (RV=5), overlay has spec.hostName=host-B (RV=6). List(MatchingFields{"spec.hostName": "host-A"}) includes the object from the informer, then overlayList swaps in the overlay version.
So you get a host-B object in a host-A query.
Or am I overlooking something?
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| // evictionHandler returns an informer event handler that evicts overlay entries | ||
| // for the GVK when the real object is observed at a >= ResourceVersion. | ||
| func (c *CachingClient) evictionHandler(gvk schema.GroupVersionKind) toolscachek8s.ResourceEventHandler { |
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is DeleteFunc missing here? what if eg someone via kubectl deletes the crd, the informer fires a delete .. but the overlay does not react on it, or?
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| // Delete delegates to the inner client and, on success for a cached GVK, stores | ||
| // a tombstone in the overlay. | ||
| func (c *CachingClient) Delete(ctx context.Context, obj client.Object, opts ...client.DeleteOption) error { |
| } | ||
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| func keyForObject(obj client.Object) objectKey { | ||
| return objectKey{namespace: obj.GetNamespace(), name: obj.GetName()} |
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What if a crd resource has the same name across lh clusters?
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