Release notes for ACK eRDMA Controller-Container Service for Kubernetes(ACK)-阿里云帮助中心

ACK eRDMA Controller manages the elastic network interfaces (ENIs) for Elastic Remote Direct Memory Access (eRDMA). It also enables pods in Container Service for Kubernetes (ACK) clusters to use eRDMA features.

Introduction

eRDMA is a high-performance RDMA network service provided by Alibaba Cloud that features low latency, high throughput, and high elasticity. eRDMA is developed based on the fourth-generation SHENLONG architecture and Virtual Private Cloud (VPC). It is fully compatible with the RDMA ecosystem and provides an ultra-large, inclusive network for Elastic Compute Service (ECS) instances.

ACK eRDMA Controller is a Kubernetes controller for eRDMA, providing ENI management, scheduling, and pod networking capabilities.

Usage note

For more information about how to use ACK eRDMA Controller, see Accelerate container networks with eRDMA.

Change history

July 2026

Version	Release date	Description	Impact
v0.2.11	July 15, 2026	Note This version is in canary release. Automatic use of Jumbo Frames by eRDMA is supported to improve performance. The eRDMA driver version is upgraded to 1.5.4. The timing of Elastic RDMA Interface (ERI) card attachment is optimized.	This update has no impact on workloads.

May 2026

Version	Release date	Description	Impact
v0.2.10	May 15, 2026	Nodes using the Ubuntu 24.04 operating system are supported.	This update has no impact on workloads.

February 2026

Version	Release date	Description	Impact
v0.2.9	February 2, 2026	The eRDMA driver version is upgraded to 1.5.4. Nodes using the Alibaba Cloud Linux 4 operating system are supported. The controller is prevented from being scheduled to Lingjun nodes.	This update has no impact on workloads.

July 2025

Version	Release date	Description	Impact
v0.2.8	July 10, 2025	The takeover of eRDMA devices on existing nodes is optimized. The controller is prevented from being scheduled to virtual Kubelet nodes.	This update has no impact on workloads.

May 2025

Version	Release date	Description	Impact
v0.2.6	May 15, 2025	ECS metadata access in security hardening mode is supported. RDMA device allocation anomalies in ContainerOS environments are fixed.	This update has no impact on workloads.

March 2025

Version	Release date	Description	Impact
v0.2.5	March 13, 2025	eRDMA is supported for pods in hostNetwork mode. Clusters running Kubernetes 1.20 are supported.	This update has no impact on workloads.

February 2025

Version	Release date	Description	Impact
v0.2.4	February 19, 2025	Dependency on Webhooks is eliminated in the Shared Memory Communication over RDMA (SMC-R) feature. Agent permission dependencies are minimized.	This update has no impact on workloads.

December 2024

Version	Release date	Description	Impact
v0.2.3	December 5, 2024	Permissions are authorized through ACK roles, eliminating the dependency on RAM Roles for Service Accounts (RRSA) authorization configurations.	This update has no impact on workloads.

November 2024

Version	Release date	Description	Impact
v0.2.2	November 26, 2024	The routing priority configuration for ENIs of eRDMA is optimized.	This update has no impact on workloads.
v0.2.1	November 25, 2024	ContainerOS is supported as a node operating system. The failure that occasionally occurs when the driver is downloaded and installed is fixed.	This update has no impact on workloads.
v0.1.0	November 18, 2024	ACK eRDMA Controller is released.	This update has no impact on workloads.