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feat: check dependency for state of the world reconciler #870

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merged 1 commit into from
Sep 27, 2024

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KevFan
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@KevFan KevFan commented Sep 24, 2024

Description

Closes: #811

Checks for dependencies for whether specific watchers and object kinds should be added to the controller opts of the state of the world reconciler

Comment on lines +91 to +93
// TODO: add object links
)
// TODO: add specific tasks to workflow
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Future TODOs that would be completed by other issues as functionality is migrated to the workflow

Signed-off-by: KevFan <chfan@redhat.com>
@KevFan KevFan self-assigned this Sep 25, 2024
@KevFan KevFan added kind/enhancement New feature or request size/small labels Sep 25, 2024
@KevFan KevFan marked this pull request as ready for review September 25, 2024 11:07
@KevFan KevFan requested review from guicassolato and Boomatang and removed request for guicassolato September 25, 2024 11:07
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Have yet to run it but wanted to ask about what happens if there is not gateways first.

Also I know you have the to do's marked in. So I guess the linking functions would be the next step.

@@ -59,6 +64,71 @@ func NewPolicyMachineryController(manager ctrlruntime.Manager, client *dynamic.D
controller.WithReconcile(buildReconciler(client)),
}

ok, err := kuadrantgatewayapi.IsGatewayAPIInstalled(manager.GetRESTMapper())
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What should happen if there is no gateway currently installed that we can use? We would need at least one, I am asking the same question of the cert manger if that is not installed should we try reconcile. I am aware that the user may install these resources later, but that would mean restarting the operator (which I am okay with).

I guess my question is; should we even start the operator if there is no gateway that we can use installed?

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Yeah, not sure what's the best approach but I've went with the approach of the existing controllers which gets disabled rather than crash when a dependency CRD is not detected (which we have existing integration tests for) 🤔

Personally, I think it's better not to crash and have this reported in the Policy Status also since a user may not initially look through logs on why things are not working as expected.

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@eguzki eguzki Sep 26, 2024

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I agree, the operator should not crash. Personally, for now, what I would do is to disable watchers and maybe steps in the workflow. There should be a task responsible for the kuadrant CR status that watches for changes on Kuadrant CRDs (which we can assume they exist). Then, the task checks for GatewayAPI being installed and reports in the status if not. Same for policies.

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After the call I am happy that we have a plan to get the errors these missing CRDs and resources can cause into the status of kuadrant and / or the related policies. Would be good to create issue for any follow up work this may need.

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eguzki commented Sep 26, 2024

LGTM

I leave approval to @Boomatang

@KevFan KevFan merged commit 1985a16 into Kuadrant:main Sep 27, 2024
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[state-of-the-world reconciler] Dependency check
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