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fix: Move K8scel driver from framework #3570

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merged 11 commits into from
Nov 4, 2024

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abhipatnala
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What this PR does / why we need it:

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):
Fixes #3500

Special notes for your reviewer:

@abhipatnala abhipatnala requested a review from a team as a code owner October 3, 2024 21:22
@abhipatnala abhipatnala changed the title Fix: Move K8scel driver from framework fix: Move K8scel driver from framework Oct 3, 2024
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codecov-commenter commented Oct 3, 2024

Codecov Report

Attention: Patch coverage is 48.68421% with 351 lines in your changes missing coverage. Please review.

Project coverage is 47.58%. Comparing base (3350319) to head (6f598fa).
Report is 171 commits behind head on master.

Files with missing lines Patch % Lines
pkg/drivers/k8scel/schema/schema.go 33.89% 109 Missing and 8 partials ⚠️
pkg/drivers/k8scel/driver.go 29.13% 100 Missing and 7 partials ⚠️
pkg/drivers/k8scel/transform/vap_util.go 0.00% 51 Missing ⚠️
pkg/drivers/k8scel/transform/make_vap_objects.go 74.52% 18 Missing and 9 partials ⚠️
pkg/drivers/k8scel/transform/request.go 69.76% 21 Missing and 5 partials ⚠️
pkg/drivers/k8scel/transform/cel_snippets.go 87.50% 12 Missing ⚠️
pkg/drivers/k8scel/args.go 0.00% 6 Missing ⚠️
pkg/drivers/k8scel/new.go 55.55% 3 Missing and 1 partial ⚠️
pkg/controller/constraint/constraint_controller.go 0.00% 1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (3350319) and HEAD (6f598fa). Click for more details.

HEAD has 1 upload less than BASE
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unittests 2 1
Additional details and impacted files
@@            Coverage Diff             @@
##           master    #3570      +/-   ##
==========================================
- Coverage   54.49%   47.58%   -6.92%     
==========================================
  Files         134      236     +102     
  Lines       12329    19717    +7388     
==========================================
+ Hits         6719     9382    +2663     
- Misses       5116     9456    +4340     
- Partials      494      879     +385     
Flag Coverage Δ
unittests 47.58% <48.68%> (-6.92%) ⬇️

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is k8scel driver going to be removed from frameworks after these changes are in GK?

I think we should move "VAP related" code - https://github.com/open-policy-agent/gatekeeper/blob/master/pkg/controller/constraint/constraint_controller.go#L623 to EOF - under transform. wdyt? @open-policy-agent/gatekeeper-maintainers

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ritazh commented Oct 7, 2024

is k8scel driver going to be removed from frameworks after these changes are in GK?

Ideally this PR should test against a PR in framework that removes the k8scel driver to ensure all k8scel changes are migrated from framework to GK.

I think we should move "VAP related" code - https://github.com/open-policy-agent/gatekeeper/blob/master/pkg/controller/constraint/constraint_controller.go#L623 to EOF - under transform. wdyt? @open-policy-agent/gatekeeper-maintainers

+1 and https://github.com/open-policy-agent/gatekeeper/blob/master/pkg/controller/constrainttemplate/constrainttemplate_controller.go#L750 will need to be moved too

@abhipatnala abhipatnala force-pushed the move_cel_driver branch 4 times, most recently from 639f1b5 to 6efad9d Compare October 14, 2024 20:55
go.mod Outdated
@@ -2,6 +2,8 @@ module github.com/open-policy-agent/gatekeeper/v3

go 1.22.0

replace github.com/open-policy-agent/frameworks/constraint v0.0.0-20240927180816-0f64229c5539 => github.com/abhipatnala/frameworks/constraint v0.0.0-20241010172729-61e15952c5c5
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@abhipatnala can you pls open a PR on framework as well so we can review and get it merged before merging this one? thanks!

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@ritazh Here is the Pr for removing cel driver from framework: open-policy-agent/frameworks#486

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@abhipatnala PTAL and remove the go.mod override 😄

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is k8scel driver going to be removed from frameworks after these changes are in GK?

I think we should move "VAP related" code - https://github.com/open-policy-agent/gatekeeper/blob/master/pkg/controller/constraint/constraint_controller.go#L623 to EOF - under transform. wdyt? @open-policy-agent/gatekeeper-maintainers

@abhipatnala can you move this code as well and the code block suggested by @ritazh in above comment?

Avinash Patnala added 4 commits October 23, 2024 17:37
Signed-off-by: Avinash Patnala <[email protected]>
…ginal repo for testing

Signed-off-by: Avinash Patnala <[email protected]>
… once we fallback to original framwork repo

Signed-off-by: Avinash Patnala <[email protected]>
Signed-off-by: Avinash Patnala <[email protected]>
Signed-off-by: Avinash Patnala <[email protected]>
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abhipatnala commented Oct 23, 2024

is k8scel driver going to be removed from frameworks after these changes are in GK?

Ideally this PR should test against a PR in framework that removes the k8scel driver to ensure all k8scel changes are migrated from framework to GK.

I think we should move "VAP related" code - https://github.com/open-policy-agent/gatekeeper/blob/master/pkg/controller/constraint/constraint_controller.go#L623 to EOF - under transform. wdyt? @open-policy-agent/gatekeeper-maintainers

+1 and https://github.com/open-policy-agent/gatekeeper/blob/master/pkg/controller/constrainttemplate/constrainttemplate_controller.go#L750 will need to be moved too

I have updated the pr with those changes @ritazh @JaydipGabani

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Actually, reflecting on moving vapForVersion and vapBindingForVersion, I think those should stay with the controller code.

This is because they are entirely used by the controllers as a way to govern which API version they use to communicate with the API server and are tightly coupled to the implementation of the controllers themselves.

Under the theory that centralized code should have official versions that it supports (usually versionless), we should avoid introducing versioning semantics anywhere other than the edge (i.e. immediately before requests are sent to K8s).

Arguably this is also true for the IsVapAPIEnabled as well, but at least there the code is shared, so having a common import path makes sense. I don't like the idea of the drivers/k8scel package interacting with the API server directly (this makes its functionality selectively portable to other use cases like Gator), but there is no great central owner. Leaving it in constraint controller also works.

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NOT moving the functions defined in the constraint/template controller would also limit merge conflicts with Jaydip's PR adding time delay to binding creation.

var GroupVersion *schema.GroupVersion
// var VapAPIEnabled *bool

// var GroupVersion *schema.GroupVersion
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pls remove commented code.

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Done

return false, nil
}

func vapBindingForVersion(gvk schema.GroupVersion) (client.Object, error) {
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I agree with @maxsmythe on

Actually, reflecting on moving vapForVersion and vapBindingForVersion, I think those should stay with the controller code.

Let's not move there two methods.

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Done

@@ -747,17 +747,6 @@ func makeGvk(kind string) schema.GroupVersionKind {
}
}

func vapForVersion(gvk *schema.GroupVersion) (client.Object, error) {
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I agree with @maxsmythe on

Actually, reflecting on moving vapForVersion and vapBindingForVersion, I think those should stay with the controller code.

Let's not move there two methods.

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done

Avinash Patnala added 3 commits October 29, 2024 17:34
@ritazh ritazh added this to the v3.18.0 milestone Oct 30, 2024
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Two changes, otherwise LGTM.

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v1beta1ToV1 should be moved to transform probably under make_vap_object.go, since it acts as "constructor" for v1 VAP.

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v1beta1ToV1 should be moved to transform probably under make_vap_object.go, since it acts as "constructor" for v1 VAPB.

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We should probably just wait for the scheme.Convert() bug to be fixed, as that's the "proper K8s" way to convert across versions. In general, core libraries should deal only with unversioned representations.

This has the added advantage of reducing merge conflicts with your PR.

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If that's the case, I am good with the changes. @ritazh @sozercan PTAL.

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I'm ok with leaving it as is. but can we add a TODO comment for the bug and open an issue so we can come back to it later to clean it up? @JaydipGabani

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I added the TODO -

// TODO(jgabani): Use r.scheme.Convert to convert from v1beta1 to v1 once the conversion bug is fixed - https://github.com/kubernetes/kubernetes/issues/126582
and had opened an issue - kubernetes/kubernetes#126582

This is the response I got "Conversion is only defined to the internal "hub" API type, not directly from one external version to another, and is only done by the api server, not by clients." I will follow up with api-server to see if this is something that can be fixed.

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hmm then sounds like its not a bug. not a blocker for this PR tho.

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LGTM once gomod override is removed.

@@ -15,7 +15,8 @@ require (
github.com/google/uuid v1.6.0
github.com/onsi/gomega v1.34.1
github.com/open-policy-agent/cert-controller v0.11.0
github.com/open-policy-agent/frameworks/constraint v0.0.0-20240927180816-0f64229c5539
github.com/open-policy-agent/frameworks/constraint v0.0.0-20241007142041-e84361fed758
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@maxsmythe maxsmythe merged commit 682a493 into open-policy-agent:master Nov 4, 2024
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Move pkg/driver/k8snative from framework
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