v1.18 release

Published on: 2025-04-29

Announcing Knative v1.18 Release¶

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

Follow the instructions in Installing Knative to install the components you require.

This release's core components bring a few new changes.

Serving brings a notable change of new minimum version of k8s to v1.31 with some additional smaller improvements and/or fixes.
Eventing comes with a new EventTransform API CRD and a few other changes.
Functions component introduces a new Python middleware using ASGI specification and allowing the use of the Host builder with some other minor fixes and improvements.

Original notes: Knative Serving 1.18

Add the ability to use mountPropagation for volumeMounts, gated under kubernetes.podspec-volumes-mount-propagation (#15758, @elijah-rou)
Adding support for CSI (Container Storage Interface) volumes. This feature allows users to mount CSI-compatible storage volumes into their Knative service containers. It enables integration with enterprise storage solutions and cloud provider storage services that implement the CSI specification. The feature is behind the flag kubernetes.podspec-volumes-csi. (#15815, @mwritescode)
Autoscaling: ignore ScaleDownDelay if the revision is not reachable (#15831, @scottjmaddox)
Support exec readiness probes for sidecar containers (#15773, @flomedja)

Fixes revision timeout defaulting when identical values are present in timeout settings. (#15617, @skonto)

Original notes: Knative Eventing 1.18

Add EventTransform API CRD. (#8456, @pierDipi)
Add EventTransform API types. (#8447, @pierDipi)
Add sinks.knative.dev to namespaced ClusterRoles (#8432, @pierDipi)
Allow storage-version-migration job to successfully run when optional CRDs are not installed (inmemorychannels, etc). (#8510, @PinotNoir04)
ContainerSource now compares the entire PodTemplateSpec, instead of just its PodSpec. This avoids loosing edits on metadata, like annotations (#8558, @matzew)
EventTransform: Support transforming response from Sink (#8469, @pierDipi)
Reduce mt-broker-controller memory usage with namespaced endpoint informer. (#8418, @pierDipi)
SinkBinding: Set specific conditions for reconciler steps: SinkBindingAvailable and TrustBundlePropagated (#8508, @pierDipi)
TLS / Cert Manager integration for IntegrationSink (#8509, @matzew) Update k8s version in e2e tests (#8503, @dsimansk)

Original notes: Knative Functions 1.18

Removes redundant default labels and annotations (#2746, @KapilSareenp)
Adds the ability to specify a storage class for remote build volumes with --remote-storage-class (#2693, @lkingland)
Python Functions now use the ASGI specification for method signature; Python Functions now support instances and lifecycle events. See the new templates for details. The Host builder now can build and run Python functions locally without a container. (#2685, @lkingland)

Original notes: Knative Operator 1.18

Added support to specify tolerations for Operator deployments. (#2031, @bacek)
Proper order is enforced now during manifest installation. (#2010, @skonto)
Watch and reconcile operator-controller ConfigMaps and reduce memory usage by only watching Knative specific deployments and configmaps. (#2062, @pierDipi)

Release Leads:

Contributors:

Knative is an open source project that anyone in the community can use, improve, and enjoy. We'd love you to join us!