[WIP] ✨ Generation of typed apply clients using upstream generator #818

JoelSpeed · 2023-05-19T08:34:04Z

This integrates the upstream applyconfig generator into controller-tools to allow generation of ApplyConfig style types from custom API types.

The aim here is to provide the pointer style structs that could then be passed to an Apply style method for using server side apply.

Setting this up as a WIP PR for now, current TODO list:

Work out if there's any extra stuff here that's not needed
Work out how to test this without the hack adding cronjob testdata to the go.mod
Do we need OpenAPI schema/do we need the extract functions?
General review of code and cleanup - this was quite hacky when I started the branch
How would a user want this integrated into their project?

k8s-ci-robot · 2023-05-19T08:34:06Z

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

JoelSpeed · 2023-05-19T09:43:16Z

pkg/applyconfigurations/gen.go

+	"k8s.io/api/":                   "k8s.io/client-go/applyconfigurations/",
+}
+
+const importPathSuffix = "applyconfiguration"


Should this be configurable via a marker?

This is now available to be customized with the marker kubebuilder:ac:output:package

JoelSpeed · 2023-05-19T09:44:24Z

pkg/applyconfigurations/gen.go

+	enableTypeMarker = markers.Must(markers.MakeDefinition("kubebuilder:ac:generate", markers.DescribesType, false))
+)
+
+var importMapping = map[string]string{


Should we allow additional import mappings, I know the upstream applyconfiguration gen does

I think that makes sense, yeah (But we can do that in a follow-up)

JoelSpeed · 2023-05-19T09:46:27Z

/test all

Need to work out how to test this, but want to see what the existing tests do with this so I can fix any failures introduced

JoelSpeed · 2023-05-19T15:39:01Z

/test all

JoelSpeed · 2023-05-19T15:52:25Z

pkg/applyconfigurations/applyconfiguration_integration_test.go

+		filesInMaster := make(map[string][]byte)
+		masterFileNames := sets.New[string]()
+		cronJobFS := os.DirFS(".")
+		masterPath := "applyconfiguration-master"


Because I can't change the directory to which we are generating the assets currently, this is what I came up with, create a copy that we keep checked in and then diff against that, if there are genuine changes we can update both copies.

Will look at gengo to see if there's a backwards compatible way to allow it to output to different places like OutputRule does for these generators

JoelSpeed · 2023-05-19T15:56:13Z

/assign @alvaroaleman

EraYaN · 2023-05-22T07:49:50Z

As an option I would love to have the Extract functions, we use them extensively in our operator (for better or for worse).

sbueringer · 2023-05-23T09:04:15Z

pkg/applyconfigurations/gen.go

+	genericArgs, _ := generatorargs.NewDefaults()
+	genericArgs.InputDirs = []string{root.PkgPath}
+	genericArgs.OutputPackagePath = filepath.Join(root.PkgPath, importPathSuffix)
+	genericArgs.GoHeaderFilePath = ctx.HeaderFilePath


If I see correctly this currently stores the generated files somewhere below GOPATH/src (which isn't where I have the controller-tools repo). Would be probably good to align this to how we can set output dir in other generators.

I tried to run this in Cluster API with ~ apply paths=./api/... I end up with files generated in $GOPATH/src/sigs.k8s.io/cluster-api/api/v1beta1/applyconfiguration/api/v1beta1

Not sure if it's good if we store the applyconfigurations in a sub-package of the API types. Might be a simple output:apply:dir would be better and then we can store it below there, e.g.

output:apply:dir is explicitly set to $GOPATH/src/sigs.k8s.io/cluster-api/applyconfigurations

files are then generated in e.g. $GOPATH/src/sigs.k8s.io/cluster-api/applyconfiguration/api/v1beta1

I think this would follow the same pattern as the ones in client-go. (side note: the API folders are not well structured in Cluster API)

(probably this is covered by #818 (comment) feel free to resolve)

sbueringer · 2023-05-23T09:29:10Z

@JoelSpeed Can we get rid of the vendor folder? It's probably on my side but the performance of the file tab is pretty bad with 1700 files.

sbueringer · 2023-05-23T09:37:25Z

pkg/applyconfigurations/testdata/cronjob/applyconfiguration-master/internal/internal.go

@@ -0,0 +1,46 @@
+// Code generated by applyconfiguration-gen. DO NOT EDIT.
+
+package internal


Q: Why this is generated?

applyconfiguration-gen always outputs this. The Parser() item is used in the internal extract implementations. And that schema yaml defines what items can then be parsed I believe.

called like this in extractCrdType

internal.Parser().Type("com.domain.group.api.v1.CrdType")

alvaroaleman · 2023-05-23T20:55:23Z

@JoelSpeed Can we get rid of the vendor folder? It's probably on my side but the performance of the file tab is pretty bad with 1700 files.

Second this, I can literally not review this through the GitHub UI

JoelSpeed · 2023-05-26T14:23:47Z

@JoelSpeed Can we get rid of the vendor folder? It's probably on my side but the performance of the file tab is pretty bad with 1700 files.

Second this, I can literally not review this through the GitHub UI

Sorry about that, must have committed during my experimenting, dropped it now, commit history in need of a good clean though

alvaroaleman

For an internal project, I added the +kubebuilder:ac:generate=true comment both on the package and on my type, running controller-gen with apply paths=./pkg/api/v1/ succeeds but doesn't generate anything - any idea what I am am doing wrong?

alvaroaleman · 2023-05-23T20:49:02Z

pkg/applyconfigurations/gen.go

+	enableTypeMarker = markers.Must(markers.MakeDefinition("kubebuilder:ac:generate", markers.DescribesType, false))
+)
+
+var importMapping = map[string]string{


I think that makes sense, yeah (But we can do that in a follow-up)

alvaroaleman

For an internal project, I added the +kubebuilder:ac:generate=true comment both on the package and on my type, running controller-gen with apply paths=./pkg/api/v1/ succeeds but doesn't generate anything - any idea what I am am doing wrong?

sbueringer · 2023-05-30T17:49:57Z

For an internal project, I added the +kubebuilder:ac:generate=true comment both on the package and on my type, running controller-gen with apply paths=./pkg/api/v1/ succeeds but doesn't generate anything - any idea what I am am doing wrong?

Potentially could be: #818 (comment)

k8s-ci-robot · 2023-09-18T09:18:50Z

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JoelSpeed · 2023-09-18T09:20:39Z

@jakobmoellerdev Reached out to me last week and sent me a patch that we think resolves a number of the comments here.

@jakobmoellerdev Anything the reviewers need to know about what you've changed?

jakobmoellerdev · 2023-09-18T09:21:50Z

pkg/applyconfigurations/gen.go

+	"k8s.io/api/":                   "k8s.io/client-go/applyconfigurations/",
+}
+
+const importPathSuffix = "applyconfiguration"


This is now available to be customized with the marker kubebuilder:ac:output:package

jakobmoellerdev · 2023-09-18T09:24:35Z

pkg/applyconfigurations/gen.go

+	// looking into the package and retrieving the first go file it finds, and using that as the output base.
+	// this is because we cannot rely on gogen calculating the correct output base.
+	// if we leave this empty, gogen will attempt to use GOPATH to write the files which is not wanted
+	genericArgs.OutputBase = filepath.Dir(root.GoFiles[0])


I think with some more invest it may be possible to resolve the directory smoother but there we issues with the output package not having correct import paths. For now this will work fine with the generation of the base directory being in the package path. For the request of having a directory outside of the package path this needs adjustment though. Open to any ideas here

I believe in general it should now work both within and outside GOPATH and should resolve the issue @sbueringer and @alvaroaleman not seeing the generated files in the right folders

jakobmoellerdev · 2023-09-18T09:27:10Z

pkg/oot_testsubdirectory

I believe this file was included due to the patch, should be removed from the final version

k8s-ci-robot · 2023-10-20T02:36:35Z

PR needs rebase.

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erikgb · 2023-10-21T10:06:47Z

@JoelSpeed Do you have some bandwidth to follow up on this PR? I just added the upstream generator to one of our projects to get some progress towards SSA, and it was NOT a pleasant experience! I would love to see the ability to generate apply clients with controller-gen.

JoelSpeed · 2023-10-23T09:14:37Z

@erikgb I'm currently waiting on a second round of review from those who previously reviewed. @jakobmoellerdev kindly continued the work and we pushed his updates to my branch, but haven't had a review since then

jakobmoellerdev · 2024-01-18T18:06:45Z

New year new bump :) any chance this can get another round of review? I can resolve the merge conflict if necessary @JoelSpeed, please let me know if I should take another look

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/lifecycle stale

sbueringer · 2024-04-17T18:44:01Z

/remove-lifecycle stale
/lifecycle frozen

Apologies for the further delay. Really trying to get around to it, just too much going on.

k8s-ci-robot · 2024-04-17T18:44:03Z

@sbueringer: The lifecycle/frozen label cannot be applied to Pull Requests.

In response to this:

/remove-lifecycle stale
/lifecycle frozen

Apologies for the further delay. Really trying to get around to it, just too much going on.

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jakobmoellerdev · 2024-06-13T10:37:32Z

@sbueringer Bringing this back from the depths of your PR pile!

sbueringer · 2024-06-13T11:19:19Z

Not sure if I actually asked it somewhere :). @JoelSpeed How fundamentally might this PR change with the rebase that is necessary for 1.30?

JoelSpeed · 2024-06-13T11:22:40Z

How fundamentally might this PR change with the rebase that is necessary for 1.30?

Great question. I know there's been a massive rewrite of the gengo stuff, I have some WIP stuff in place for some OpenShift tooling that was affected by that, but in general, it wasn't massive. I would hope this would be similar, but yes, we need to get the deps updated to 1.30 and see tbh

sbueringer · 2024-06-13T15:34:03Z

Was just wondering if it makes sense for me to review the PR before the rebase. I could commit to actually doing the review assuming you find the time for a rebase :)

jakobmoellerdev · 2024-06-13T15:36:29Z

@JoelSpeed I take that as you choose to do the rebase or I submit another patch. :) PLMK

JoelSpeed · 2024-06-13T15:46:17Z

I likely won't have time until next friday to take that on, but if you want to have a go @jakobmoellerdev I can force push whatever you come up with over my branch again if you wanted?

k8s-triage-robot · 2024-11-13T15:57:02Z

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/lifecycle stale

EraYaN · 2024-11-15T11:15:00Z

This is still relevant

/remove-lifecycle stale

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✨ Generation of typed apply clients #536

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add support for handling plain+v0 bundle types operator-framework/operator-controller#242

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Opt-in to tolerate ad-hoc modification in resources alexandrevilain/temporal-operator#418

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OCPVE-613: feat: switch to SSA for resource reconciliation openshift/lvm-operator#395

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I believe this file was included due to the patch, should be removed from the final version

k8s-ci-robot added the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label Oct 20, 2023

This was referenced Oct 25, 2023

chore: generate applyconfigurations for API statnett/image-scanner-operator#668

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chore: generate applyconfigurations for custom resources cert-manager/trust-manager#217

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alvaroaleman mentioned this pull request Mar 8, 2024

⚠ Client Server side apply kubernetes-sigs/controller-runtime#2702

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		@@ -0,0 +1,46 @@
		// Code generated by applyconfiguration-gen. DO NOT EDIT.

		package internal

[WIP] ✨ Generation of typed apply clients using upstream generator #818

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[WIP] ✨ Generation of typed apply clients using upstream generator #818

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