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

The ACK eRDMA Controller manages elastic network interfaces (ENIs) that support eRDMA and enables eRDMA for pods in ACK clusters. This topic describes the release notes for the controller.

Overview

Elastic Remote Direct Memory Access (eRDMA) is a high-performance RDMA network service from Alibaba Cloud that offers low latency, high throughput, and high elasticity. Built on the fourth-generation SHENLONG architecture and Virtual Private Cloud (VPC), eRDMA is a widely available RDMA service for ECS. It is fully compatible with the RDMA ecosystem and supports large-scale network deployments.

The ACK eRDMA Controller is the Kubernetes controller for Alibaba Cloud eRDMA. It provides elastic network interface (ENI) management, scheduling, and networking for pods.

Usage

To learn how to use the ACK eRDMA Controller, see Accelerate container networks with eRDMA.

Release notes

May 2025

Version	Release date	Changes	Impact
v0.2.10	May 15, 2025	Added support for Ubuntu 24.04 as the node operating system.	This update has no impact on existing workloads.

February 2025

Version	Release date	Changes	Impact
v0.2.9	February 2, 2025	Upgraded the `eRDMA` driver to version `1.5.4` to support Alibaba Cloud Linux 4 as the node operating system. Updated the scheduling logic to prevent the controller from being deployed on Lingjun nodes.	This update has no impact on existing workloads.

July 2025

Version	Release date	Changes	Impact
v0.2.8	July 10, 2025	Improved the management of existing eRDMA devices on nodes. Updated the scheduling logic to prevent the controller from being deployed on VK nodes.	This update has no impact on existing workloads.

May 2025

Version	Release date	Changes	Impact
v0.2.6	May 15, 2025	Added support for ECS metadata access in security hardening mode. Fixed an issue with RDMA device allocation in ContainerOS environments.	This update has no impact on existing workloads.

March 2025

Version	Release date	Changes	Impact
v0.2.5	March 13, 2025	Pods in host network mode can now use eRDMA. Added support for ACK clusters that run Kubernetes 1.20.	This update has no impact on existing workloads.

February 2025

Version	Release date	Changes	Impact
v0.2.4	February 19, 2025	Removed the dependency on webhooks for the Shared Memory Communications over RDMA (SMC-R) feature. Reduced the required permissions for the agent.	This update has no impact on existing workloads.

December 2024

Version	Release date	Changes	Impact
v0.2.3	December 5, 2024	The controller now acquires permissions through the ACK service role, removing the dependency on RAM Roles for Service Accounts (RRSA).	This update has no impact on existing workloads.

November 2024

Version	Release date	Changes	Impact
v0.2.2	November 26, 2024	Optimized the routing priority for the eRDMA elastic network interface (ENI).	This update has no impact on existing workloads.
v0.2.1	November 25, 2024	Added support for ContainerOS as a node operating system. Fixed an intermittent issue causing driver download or installation failures.	This update has no impact on existing workloads.
v0.1.0	November 18, 2024	Initial release of the ACK eRDMA Controller.	This update has no impact on existing workloads.