Knative Eventing release v1.4.0

Changes by Kind

API Change

• The minimum Kubernetes version is 1.22. (#6280, @pierDipi)

New Features

• The sugar reconciler has been integrated into the base eventing controller and is now controlled by two LabelSelector fields.
  namespace-sugar-selector and trigger-sugar-selector fields in the config-sugar ConfigMap in knative-eventing Namespace allow you to use a Kubernetes LabelSelector to choose which namespaces or triggers respectively should have a Broker provisioned.

  To migrate existing usage of the sugar controller, do the following:

  1. Set the namespace-sugar-selector to the value:
     matchExpressions:

     • key: "eventing.knative.dev/injection"
       operator: "In"
       values: ["enabled"]

  2. Set the trigger-sugar-selector to the value:
     matchExpressions:

     • key: "eventing.knative.dev/injection"
       operator: "In"
       values: ["enabled"]

  3. Remove the Deployment defined by the eventing-sugar-controller.yaml resources
     in the previous release. (#6027, @xtreme-sameer-vohra)

Bug or Regression

• Set dead letter sink URI in the Channel status (#6256, @pierDipi)
• MTChannelBroker can now co-exist with other broker implementations. (#6265, @n3wscott)
• The service created for the inmemorychannel's dispatcher will have ports defined, similar to the rest of the services. (#6283, @jhill072)

Cleanups

• Reduced duplication of observability.yaml config map which existed in multiple locations by symlinking "config/channels/in-memory-channel/configmaps/observability.yaml" to "config/core/configmaps/observability.yaml". (#6301, @matzew)
• Reduced duplication of tracing.yaml config map which existed in multiple locations by symlinking "config/channels/in-memory-channel/configmaps/tracing.yaml" to "config/core/configmaps/tracing.yaml". (#6295, @xtreme-sameer-vohra)
• The sendevent tool is not part of Eventing core anymore, an alternative is available as kn plugin https://github.com/knative-sandbox/kn-plugin-event (#6284, @pierDipi)