v0.25 release

A new version of Knative is now available across multiple components.

Follow the instructions in the documentation Installing Knative for the respective component.

In preparation for GA, the net-kourier components have been renamed. See Breaking Changes in the Serving section.
The depecreated namespace label networking.internal.knative.dev/disableWildcardCert is now removed. See Breaking Changes in the Serving section.
Trigger ready status now takes into account the DeadLetterURI
The kn CLI now looks for plugin in the $PATH allowing for easy installation of plugins like kn-quickstart

Renaming of some net-kourier component

Related issue: knative/networking#448

As part of our efforts to GA/1.0 we've standardized on the naming of our networking plugins that are installed alongside Serving. If you're managing your Knative deployment manually with kubectl this will require a two-phase upgrade process. In order to upgrade net-kourier to v0.25.0 using kubectl please follow the steps:
```
```bash
# Apply the new release
$ kubectl apply -f net-kourier.yaml

# Once the deployment is ready apply the same file but
# prune the old resources
$ kubectl apply -f net-kourier.yaml \
--prune -l networking.knative.dev/ingress-provider=kourier
```
```
- Disabling namespace certificate provisioning legacy label
The namespace label networking.internal.knative.dev/disableWildcardCert has been deprecated since v0.15.0 release in favour of networking.knative.dev/disableWildcardCert. We have dropped support for this legacy label (#11626)

A feature flag is available to enable priorityClassName for Knative Services. See config-features for details. (#11746)
Add memory metrics for HPA: hpa.autoscaling.knative.dev (#11668)
Added app.kubernetes.io/name labels to resources. It will be replacing app labels in the future. (#11655)
Users can set in the field spec.template.spec.containers[*].securityContext.runAsNonRoot to true in a PodSpec without a feature flag (#11606)
Users can set in the field spec.template.spec.automountServiceAccountToken to false in a PodSpec in order to opt-out of Kubenetes' default behaviour of mounting a ServiceAccount token in that Pod's containers. (#11723)
Add v1beta1 version of DomainMapping CRD (#11682)

Set ENABLE_HTTP2_AUTO_DETECTION to false by default if the feature is not enabled. (#11760)

Add DeadLetterURI to Trigger status, block ready until it is resolvable (#5551)
Add a health endpoint to event_display for enabling readiness probes. (#5608)
Adds support for HTTP OPTIONS and CloudEvents Webhook preflight (#5542)

The Trigger status contains the resolved URL of the configured dead letter sink. (#1092)

Fix to support subscribers that are a Kubernetes service. The service's endpoint doesn't contain a trailing slash. (#1123)

Distributed KafkaChannel Dispatcher will now re-queue KafkaChannels after failed reconciliation which will improve various failure recovery scenarios, but could consume CPU resources if reconciliation is blocked by underlying system issues (bad Kafka Secret config, etc.) (#795)
Separated CRDs to extra, additional YAML manifest (similar to eventing) (#799)
Enabled support for ResetOffset CRD in distributed KafkaChannel, see config/command/resetoffset for details. (#761)
The consolidated KafkaChannel dispatcher is now owned by the controller. (#798)

The new plugin kn-quickstart is now part of the home-brew plugins suite. Install the plugin using brew install knative-extensions/kn-plugins/quickstart then use it with kn quickstart kind this will create a kind cluster with knative installed. Make sure to update kn to v0.25 for example using brew upgrade kn
Deprecate lookup-path as path lookup will always be enabled in the future (#1422)
Add --tls option to domain create command (#1419)
Lookup plugins in $PATH by default (#1412)
Add --class flag to broker create command (#1402)
Add darwin/arm64 support to kn (#1401)
Add base64 data handling to Ping commands (#1392) (#1388)
Add support for multiple containers in Service spec (#1382)
Make --cmd flag an array instead of string (#1380)
Add a client.knative.dev/updateTimestamp annotation to trigger a new revision when required (#1364)

Operator v0.25¶

Detect missing Istio requirement and suggests user to instal the Istio Gateway CRD #697

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