TriggerAuth-podIdentity.identityId - validation removed (operator) #5142

radekfojtik · 2023-10-31T14:28:10Z

TriggerAuthentication.podIdentity - validation of identityId (empty string "") removed (operator)

validation remains only in webhook

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When introducing a new scaler, I agree with the scaling governance policy
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Tests have been added
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Fixes #5109

Relates to #

Signed-off-by: radekfojtik <68660951+radekfojtik@users.noreply.github.com>

github-actions · 2023-10-31T14:28:28Z

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apis/keda/v1alpha1/triggerauthentication_webhook.go

Signed-off-by: radekfojtik <68660951+radekfojtik@users.noreply.github.com>

radekfojtik · 2023-11-17T09:19:38Z

@JorTurFer @tomkerkhove please take a look guys

josefkarasek

I tested the PR locally with:

Install keda v2.11.0 with helm
Create TriggerAuthentication with identityId: ""
Upgrade to keda v.2.12.0 - I was able to reproduce the issue
Deploy patched keda and validation webhook images, include ValidatingWebhookConfiguration from charts:main branch

Old TriggerAuthentications with identityId: "" don't cause issues and the validation webhook blocks the creation of new ones.

josefkarasek · 2023-11-20T14:07:57Z

apis/keda/v1alpha1/triggerauthentication_webhook.go

+	return nil
+}
+
+func isEmptyString(str *string) bool {


Util functions like this one have a high potential for code duplicity. Can you add a new file to pkg/util and move the function there? Ideally with generics, something like

func IsDefaultValue[T comparable](value *T) bool { var def T return value != nil && *value == def }

I think that this is a good feedback ❤️

josefkarasek · 2023-11-20T14:10:18Z

apis/keda/v1alpha1/triggerauthentication_webhook.go

-			if spec.PodIdentity.IdentityID != nil && *spec.PodIdentity.IdentityID == "" {
-				return nil, fmt.Errorf("identityid of PodIdentity should not be empty. If it's set, identityId has to be different than \"\"")
+			if isEmptyString(podIdentity.IdentityID) {
+				return fmt.Errorf("identityid of PodIdentity should not be empty. If it's set, identityId has to be different than \"\"")


Suggested change

return fmt.Errorf("identityid of PodIdentity should not be empty. If it's set, identityId has to be different than \"\"")

return fmt.Errorf("identityId of PodIdentity should not be empty. If it's set, identityId has to be different than \"\"")

zroubalik · 2023-11-20T14:37:26Z

Just a side note, we shouldn't rely on validation webhooks that much. If possible, this should work withouth validation as well.

tomkerkhove · 2023-11-21T07:52:23Z

100%

JorTurFer · 2023-11-21T20:55:45Z

Just a side note, we shouldn't rely on validation webhooks that much. If possible, this should work withouth validation as well.

I have to disagree with this point. KEDA has to work properly handling the scenario, but the data validation is the responsibility of the webhooks, don't you think? I mean, why do we use validating webhooks for validating the data plane, if we are going to raise validation messages in the operator too?

KEDA operator will fail with a handled error if the user is providing the item wrongly (it won't panic), so other validations over the data constraints should be managed by the webhooks and users have to assume that validations are done by webhooks. As user, you can't skip the validating webhooks and also expect a well-formed validation with a lot of info about the validating error

JorTurFer · 2023-11-21T20:58:13Z

LGTM but let's wait until @zroubalik and @tomkerkhove agree with it (or not xD), because this moves the responsibility from the operator to webhooks

tomkerkhove · 2023-11-22T08:22:44Z

I have to disagree with this point. KEDA has to work properly handling the scenario, but the data validation is the responsibility of the webhooks, don't you think?
[...]
As user, you can't skip the validating webhooks and also expect a well-formed validation with a lot of info about the validating error

No, because webhooks are optional. If it would be mandatory then I'd agree.

Validation webhooks are more for enforcing best practices in the current state of KEDA, not for ensuring things are valid. If we want to go that route than making it mandatory is the only viable option.

radekfojtik · 2023-11-22T13:21:25Z

@zroubalik @tomkerkhove Having this validation on the operator side is a breaking change introduced in v2.12 (is not backwards-compatible). I would say it needs to be removed now anyway. Alternatively, it is possible to add a warning and introduce the validation in a later version. But interesting - the operator will warn the user about a non-valid value that was not added by the user but by default by the operator.

radekfojtik · 2023-11-22T15:57:39Z

I tested the PR locally with:

Install keda v2.11.0 with helm

Create TriggerAuthentication with identityId: ""

Upgrade to keda v.2.12.0 - I was able to reproduce the issue

Deploy patched keda and validation webhook images, include ValidatingWebhookConfiguration from charts:main branch

Old TriggerAuthentications with identityId: "" don't cause issues and the validation webhook blocks the creation of new ones.

@josefkarasek There is no need to set the identityId: "", the operator does it for you in case you omit this property (when the finalizer is added). Thanks for suggestions.

zroubalik · 2023-12-21T14:24:33Z

@JorTurFer could you please look at this? We should resolve this already :) Thanks

JorTurFer · 2023-12-21T17:59:02Z

@JorTurFer could you please look at this? We should resolve this already :) Thanks

I reviewed here: #5142 (comment)

From my perspective, webhooks have to validate the information and the operator has to just handle errors if they are. No having VALIDATING webhooks IMHO explicitly means that you don't have validations (because you are not installing them), just fails if you introduce something wrong.
In my opinion, this removal is 100% correct:

It moves the responsibility from the operator to the webhooks. If the operator sees and empty pod identity, it doesn't matter who sets it, and it continues with its work, failing if it has to fail

JorTurFer · 2024-01-22T10:32:42Z

We should push this topic @zroubalik @tomkerkhove

stale · 2024-03-22T11:50:45Z

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

zroubalik · 2024-03-27T16:10:32Z

@JorTurFer let's add it to the agenda for the next meeting

tomkerkhove · 2024-04-02T05:49:53Z

Sorry, I did not see the pings - Let's discuss indeed

stale · 2024-06-01T10:07:57Z

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

stale · 2024-06-08T10:32:49Z

This issue has been automatically closed due to inactivity.

stale · 2024-08-24T03:48:50Z

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

stale · 2024-08-31T04:30:32Z

This issue has been automatically closed due to inactivity.

TriggerAuth-podIdentity.identityId - validation removed (operator)

8091a30

Signed-off-by: radekfojtik <68660951+radekfojtik@users.noreply.github.com>

radekfojtik requested a review from a team as a code owner October 31, 2023 14:28

semgrep-app bot reviewed Oct 31, 2023

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apis/keda/v1alpha1/triggerauthentication_webhook.go Outdated Show resolved Hide resolved

TriggerAuthWebhook-superfluous nil err check before return (fix)

4befa5f

Signed-off-by: radekfojtik <68660951+radekfojtik@users.noreply.github.com>

radekfojtik mentioned this pull request Oct 31, 2023

TriggerAuthentication - spec.podIdentity.identityId as a pointer - breaking change in 2.12.0 #5109

Open

radekfojtik added 3 commits October 31, 2023 15:47

TriggerAuthWebhook-ci static check (fix)

357fd70

Signed-off-by: radekfojtik <68660951+radekfojtik@users.noreply.github.com>

Changelog added

ecbd6a7

Signed-off-by: radekfojtik <68660951+radekfojtik@users.noreply.github.com>

Merge branch 'main' into feature/rfo-main-triggerauth-validation

d7b49c5

josefkarasek approved these changes Nov 20, 2023

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JorTurFer mentioned this pull request Apr 9, 2024

Release: 2.14 #5671

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TriggerAuth-podIdentity.identityId - validation removed (operator) #5142

TriggerAuth-podIdentity.identityId - validation removed (operator) #5142

radekfojtik commented Oct 31, 2023 •

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	return fmt.Errorf("identityid of PodIdentity should not be empty. If it's set, identityId has to be different than \"\"")
	return fmt.Errorf("identityId of PodIdentity should not be empty. If it's set, identityId has to be different than \"\"")

TriggerAuth-podIdentity.identityId - validation removed (operator) #5142

TriggerAuth-podIdentity.identityId - validation removed (operator) #5142

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