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Kubernetes-based, scale-to-zero, request-driven compute

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Fixes #14157 ## Proposed Changes * Introduces a new PA condition (`PodAutoscalerConditionScaleTargetScaled`) that detects failures during scaling to zero, covering the K8s gaps where deployment status is not updated correctly....

size/L

## What version of Knative? 0.25.0 ## Expected Behavior Opencensus telemetry from the queue-proxy should include configuration_name, revision_name, service_name tags as [documented](https://knative.dev/v0.25-docs/admin/collecting-metrics/serving-metrics/metrics/#queue-proxy). ## Actual Behavior When I follow the documented...

kind/bug

Fixes #7324 ## Proposed Changes * Never scrape if TBC=-1. The activator will always be in path in this case, so we never need to scrape really. *Start/Stop scraping if...

size/M
ok-to-test

I have 7 replica of each revision and would want each replica to be up for 10 minutes if they are inactive and then terminate. to 0 (not just the...

kind/question

# Multiple Gateway and LoadBalancer type Service in one Knative cluster, Pros and Cons ## 1. Knative version: + Kubernetes version v1.28.3 + Knative Serving version 1.15.1 + Istio is...

kind/question

## In what area(s)? /area API /area monitoring /area networking /kind spec KEP-753 was accepted and will introduce an improvement of the sidecar container pattern. It seems it will be...

kind/feature
area/API
area/monitoring
area/networking
kind/spec
triage/accepted
k8s/1.28

Fixes #15528 **Release Note** ```release-note Enhance the scalability to adapt to different workloads. ```

size/L
needs-ok-to-test

## Describe the feature Currently, KPA natively supports automatic scaling for workloads like Deployment. However, many large enterprises have their own developed types of workloads, such as the open-source CloneSet...

kind/feature

## What version of Knative? > 0.15.2 ## Expected Behavior endpoints should update properly ## Actual Behavior Endpoints for a service are not getting updated on scale down operation or...

kind/bug

/area networking /kind feature ## Describe the feature It would be great if Knative could support [EndpointSlices](https://kubernetes.io/docs/concepts/services-networking/endpoint-slices/). This is a new Kubernetes resource that provides a scalable and extensible alternative...

kind/feature
area/networking
area/autoscale
kind/spec
lifecycle/frozen