[Misc]: ensure cache sync before starting controller reconcile

[googs1025]

Pull Request Description

[Please provide a clear and concise description of your changes here]

Related Issues

Resolves: None

• ensure cache sync before starting controller reconcile

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[gemini-code-assist]

Summary of Changes

Hello @googs1025, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a potential race condition in Kubernetes controllers by ensuring that the informer caches are fully synchronized before the controllers begin their reconciliation loops. This prevents controllers from attempting to process resources with incomplete or stale data, thereby improving the stability and correctness of controller operations.

Highlights

• Bug Fix: Implemented a fix to ensure that Kubernetes controller caches are fully synchronized before the reconciliation process starts, preventing potential issues due to stale or incomplete data.
• Controller Initialization: Added cacher.WaitForCacheSync calls within the initialization logic for both the ModelAdapter controller (newReconciler function) and the ModelRouter controller (Add function).
• Improved Observability: Incorporated klog.Info statements to log the cache synchronization status, providing better visibility into the controller's startup sequence.

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[gemini-code-assist]

Code Review

This pull request addresses a critical bug by ensuring that controller caches are fully synchronized before the reconciliation loops begin. This is a crucial step for Kubernetes controllers to operate on a consistent view of the cluster state, preventing potential race conditions and incorrect behavior due to stale data. The changes are well-placed and directly resolve the identified issue. The logging added provides good visibility into the cache synchronization process during controller startup. My only feedback is a minor improvement to the error messages for better debuggability, which I've marked as medium severity. Overall, this is a solid and necessary fix.

[Jeffwan]

nit comment, please take a look

[Jeffwan]

@Jeffwan BTW, I see you mentioned this is a bug rather than an improvement. Do you see any out of sync issues?

[googs1025]

@Jeffwan BTW, I see you mentioned this is a bug rather than an improvement. Do you see any out of sync issues?

Not at the moment, just make sure to tune after sync

[Jeffwan]

@googs1025 sounds good.