[Gateway API] Support for GRPCRoute v1 (stable channel)

[FredrikAugust]

What problem are you trying to solve?

Hello! I saw that Traefik helm chart has updated their Helm charts to use v1 of the stable channel for GRPCRoutes, and was wondering if linkerd2 supports that, or plans to introduce it soon? We would love to upgrade:)

• Here's the update from the Helm chart
• Gateway API docs listing v1 as stable
• GRPCRoute page showing CRD in GA

How should the problem be solved?

Add the v1 CRD of GRPCRoutes.

Any alternatives you've considered?

Not really.

How would users interact with this feature?

No response

Would you like to work on this feature?

None

[kflynn]

Hey @FredrikAugust, thanks for raising this! This is definitely a thing we want to do, though I don't have a timeline at this point. We'll keep this issue updated. 🙂

[FredrikAugust]

Thanks @kflynn. We're currently stuck in a little limbo right now as Traefik and Argo Rollouts (thanks to this plugin) both have moved to the stable channel, but we're unable to upgrade if linkerd2 doesn't support it so it would be great to see this in a release 🙌 If there's anything I can do to help, let me know

[olix0r]

@FredrikAugust I believe you should be able to upgrade Linkerd as long as you provide the Gateway CRDs yourself. When installing Linkerd, the CRDs chart supports a flag to omit managing the gateway resources:

linkerd2/charts/linkerd-crds/values.yaml

Line 1 in 2c1c266

enableHttpRoutes: true

Note that there may be some complexity in migrating these resources to no longer be Helm-managed; but if you are able to install the Linkerd CRDs without the Gateway resources, and you are able to provide the gateway resources externally, Linkerd should be able to read v1alpha2 (etc) resource versions when the cluster has newer v1 versions.

I'd recommend trying all of this first in a non-production environment, as CRD changes can be risky.

[FredrikAugust]

@olix0r Thanks, that's more or less what we've been doing. We're running a custom build of the argo rollouts plugin, but didn't want to upgrade to the latest version (using v1 GRPCRoute) before getting some confirmation that linkerd2 would support it. As mentioned, Traefik and the plugin both use the stable channel.