Introduction and release notes for Knative components - Container Service for Kubernetes

Knative is an open source Kubernetes-based serverless framework. The purpose of Knative is to create a cloud-native and cross-platform orchestration standard for serverless applications. Knative helps you build an enterprise-class serverless container platform to deploy and manage modern serverless workloads.

Introduction

Container Service for Kubernetes (ACK) Knative is completely compatible with open source Knative and is interfaced with ACK, message services, storage services, and networking services to provide production-level capabilities.

Knative consists of two core components. These components comprise a general-purpose serverless framework:

Knative Serving: manages serverless workloads based on events and can automatically scale pods based on resource requests. If no workload is processed, the number of pods is scaled to zero.
Knative Serving is used to manage the workloads of serverless applications that provide services to users. The most important feature of Knative Serving is pod auto scaling. Pods can be scaled without limits. Knative Serving also supports canary release.
Knative Eventing: provides event management capabilities, such as producing and consuming events.
Knative Eventing has designed an all-in-one eventing system for event-driven serverless applications. The eventing system provides features that allow you to install external event sources, register and subscribe to events, and filter events. The event system decouples event producers and event consumers. An event producer can generate events before active event consumers listen to events. An event consumer can listen to events before active producers produce events.

Usage notes

For more information about how to use Knative, see Deploy Knative. For more information about how to manage Knative, see Manage Knative components and Upgrade a Knative component. For more information about Knative, see Overview.

Release notes

June 2024

Version number	Release date	Description	Impact
v1.12.4-aliyun.7	2024-06-18	Important The Kubernetes version of the cluster must be 1.26 or later. This version is compatible with open source Knative 1.12.4. ACK managed clusters allow you to manage Knative control plane components without consuming pod resources. Knative control plane components include `controller`, `autoscaler`, and `webhook`. Knative control plane components are automatically hosted when you install Knative in a cluster. Knative on Service Mesh (ASM) is optimized. The log output of the queue-proxy component is optimized.	No impact on workloads. We recommend that you update Knative during off-peak hours.

May 2024

Version number	Release date	Description	Impact
v1.10.9-aliyun.7	2024-05-23	Both Internet-facing and internal-facing Application Load Balancer (ALB) instances are supported. The issue that routing rules are cleared when you delete a DomainMapping is fixed. The issue that reserved instances are created repeatedly is fixed. Knative applications can be scaled down to 0 in ACK Serverless cluster.	No impact on workloads. We recommend that you update Knative during off-peak hours.

December 2023

Version number	Release date	Description	Impact
v1.10.6-aliyun.1	2023-12-25	Important The Kubernetes version of the cluster must be 1.26 or later. Existing ALB instances can be reused. The downward API is supported by Knative Services. The CVE-2023-48713 vulnerability is fixed.	No impact on workloads. We recommend that you update Knative during off-peak hours.

October 2023

Version number	Release date	Description	Impact
v1.8.3-aliyun.1	2023-10-17	Knative domain mappings can be used to configure Microservices Engine (MSE) gateways to access Services over HTTPS. The issue that instances are reserved during a scale-in activity is fixed.	No impact on workloads. We recommend that you update Knative during off-peak hours.

July 2023

Version number	Release date	Description	Impact
v1.8.2-aliyun.1	2023-07-20	Important The Kubernetes version of the cluster must be 1.24 or later. Pods are created based on the `autoscaling.knative.dev/activation-scale` setting to handle traffic spikes when Knative initializes. Knative 1.4.x can be updated to 1.8.2.	No impact on workloads. We recommend that you update Knative during off-peak hours.

June 2023

Version number

Release date

Description

Impact

v1.4.5-aliyun.1

2023-06-19

Pods can be scaled to zero by ACK Serverless Knative, which works based on MSE gateways.

KServe is supported.

No impact on workloads. We recommend that you perform the update during off-peak hours.

May 2023

Version number	Release date	Description	Impact
v1.4.3-aliyun.1	2023-05-18	MSE gateways are supported. Precise scaling control based on request concurrency is supported.	No impact on workloads. We recommend that you update Knative during off-peak hours.

April 2023

Version number	Release date	Description	Impact
v1.4.2-aliyun.1	2023-04-26	This version is compatible with Kubernetes 1.26. GPU metrics-based predictive scaling by using Advanced Horizontal Pod Autoscaler (AHPA) is supported. The Kourier gateway version issue is fixed.	No impact on workloads. We recommend that you update Knative during off-peak hours.

March 2023

Version number	Release date	Description	Impact
v1.4.1-aliyun.1	2023-03-23	Reserved instances are supported. The podspec-fieldref parameter is enabled by default. Startup issues in Kafka sources are fixed.	No impact on workloads. We recommend that you perform the update during off-peak hours.