Backendref httproute filter request redirect

[arnaud-tincelin]

What type of PR is this? /kind test /area conformance

What this PR does / why we need it:

Which issue(s) this PR fixes: #2936

Does this PR introduce a user-facing change?:

NONE

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: arnaud-tincelin / name: Arnaud (f6689f57ec6eb7c885217984187b4f7f13b34fa6, c30cd8ce2f7edb516d2dbf49e322715124792eb1, 013148f7209f71d48033d4f0d948f93be32cd474, 3874b65a91f3c436ee8a43d648597badda017f05)

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[k8s-ci-robot]

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[k8s-ci-robot]

Hi @arnaud-tincelin. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[arnaud-tincelin]

thank you @mlavacca, it's a lot clearer!

I am still working on the code based on your comments and I am trying to run the tests on an AKS with istio gateway or azure gateway but in both cases the tests end up in timeout. Is there something I am missing?

The tests seem to be stuck on this:

helpers.go:223: 2024-06-06T11:26:27.841628413+02:00: gateway-conformance-infra/gateway-add-listener Gateway not Accepted yet
    helpers.go:222: 2024-06-06T11:26:28.841559903+02:00: Accepted condition set to Status False with Reason Accepted, expected Status True
    helpers.go:222: 2024-06-06T11:26:28.841667255+02:00: Accepted was not in conditions list [[{Accepted False 1 2024-06-06 11:14:31 +0200 CEST Accepted Gateway does not have annotation to reference Application Gateway for Containers resource}]]

and I started the tests with

go test ./conformance -run TestConformance -args \
    --gateway-class=istio \ # or azure-alb-external
    --supported-features=Gateway,HTTPRoute,HTTPRouteBackendPathRedirect`

[tormath1]

Hey folks, just to give an update on this PR - this test can't really work currently as the feature is not yet implemented on the various Gateway API implementations.

I started to write the Cilium implementation: https://github.com/cilium/cilium/compare/main...tormath1:cilium:tormath1/backend-request-redirect-filter and I can get the test to pass with this (with one backend at the moment).

[sayboras]

Thanks to @tormath1 to ping us in Cilium slack, and to highlight the potential issue with multiple backends in the current Cilium implementation 🙇.

[mlavacca]

This one is in a similar situation as https://github.com/kubernetes-sigs/gateway-api/pull/2821. We'd need https://github.com/kubernetes-sigs/gateway-api/issues/3009 to be addressed before adding conformance tests on feature not implemented yet by any project.

[candita]

/ok-to-test

[candita]

I don't think there is any reason to delay conformance tests while waiting for implementations. The feature implementations and feature conformance testing can be done in parallel.

[arkodg]

• imo the use case highlighted in the test is invalid - a backend shouldnt be needed when performing a redirect so a backend specific redirect doesnt make sense to me.
• when traffic splitting to different backends, you may want to redirect some traffic, here a backend specific redirect filter does make sense
• I'm a -1 on adding conformance tests for features that dont exist in implementations. The gateway api community is working towards a common vendor/project neutral API for features that exist in multiple implementations, so my suggestion is that we wait for multiple implementations to support a feature before supporting it in the API or conformance tests

[k8s-ci-robot]

PR needs rebase.

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[k8s-ci-robot]

@arnaud-tincelin: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-gateway-api-crds-validation-2	3874b65a91f3c436ee8a43d648597badda017f05	link	true	/test pull-gateway-api-crds-validation-2
pull-gateway-api-crds-validation-3	3874b65a91f3c436ee8a43d648597badda017f05	link	true	/test pull-gateway-api-crds-validation-3
pull-gateway-api-crds-validation-4	3874b65a91f3c436ee8a43d648597badda017f05	link	true	/test pull-gateway-api-crds-validation-4
pull-gateway-api-crds-validation-1	3874b65a91f3c436ee8a43d648597badda017f05	link	true	/test pull-gateway-api-crds-validation-1
pull-gateway-api-crds-validation-5	3874b65a91f3c436ee8a43d648597badda017f05	link	true	/test pull-gateway-api-crds-validation-5

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[k8s-triage-robot]

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/lifecycle rotten

[candita]

@arnaud-tincelin thank you for your contribution, and for volunteering for a good-first-issue. I guess going forward it would be best to choose an issue that is for supporting a feature that is on its way to standard and has known working implementations. If you're interested in working on another conformance test, please take a look into https://github.com/kubernetes-sigs/gateway-api/issues/1579, which has a few tests needed to implement. I wrote an example/normative test https://github.com/kubernetes-sigs/gateway-api/pull/1587 for reference.

[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the PR is closed

You can:

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• Mark this PR as fresh with /remove-lifecycle rotten
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Please send feedback to sig-contributor-experience at kubernetes/community.

/close

[k8s-ci-robot]

@k8s-triage-robot: Closed this PR.

In response to this:

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the PR is closed

You can:

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• Mark this PR as fresh with /remove-lifecycle rotten
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/close

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