RFE: Enable logging via service annotations for load balancer backends

[JoelSpeed]

GKE enables users to use a BackendConfig to enable logging of HTTP requests hitting the backend services when using the ingress objects.
For regular Kubernetes clusters on GCP that use the CCM to implement the service load balancer, there is, as far as I can tell no configuration that would allow a user to configure the load balancer backend service logging.

On other providers (eg AWS), you can enable equivalent logging using an annotation (eg service.beta.kubernetes.io/aws-load-balancer-access-log-enabled).

I would like to see support for this in the GCP CCM implementation as well.

Happy to work with maintainers to implement a solution if the idea is supported in general.

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[aojea]

AFAIK the CCM only configures netLB loadbalancers that are pass through, so that capability is not available , but better @swetharepakula @bowei to confirm or explain

[DustinTrap]

Love to see this added. Feature is important to us. ty

[JoelSpeed]

@aojea Is correct, digging into this further, it appears that GKE uses ALBs, which do support backend logging as they are L7, but the CCM by default is using passthrough netLB with target pools as backends.

It appears that there is an option to use a regional backend service, and if that's the case, I believe the logging can be enabled on the RBS.

Looks like this was added in kubernetes/kubernetes#106683, so something external is handling this.

Edit: Handled by ingress-gce

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[DustinTrap]

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