Azure/AKS 2025-05-19

Release 2025-05-19

on GitHub

Monitor the release status by region at AKS-Release-Tracker. This release is titled v20250519.

Announcements

• Customers using Azure Linux 2.0 should migrate to Azure Linux 3.0 before November 2025. For details on how to migrate from Azure Linux 2.0 to Azure Linux 3.0, see this doc. AKS is currently working on a feature to allow for migrations between Azure Linux 2.0 and Azure Linux 3.0 through a node pool update command. For updates on feature progress and availability, see Github issue.
• Starting in June 2025, AKS clusters with version >= 1.28 and using Azure Linux 2.0 can be opted into Long Term Support.
• Starting in June 2025, Azure Kubernetes Service will begin rolling out a change to enable quota for all current and new AKS customers. AKS quota will represent a limit of the maximum number of managed clusters that an Azure subscription can consume per region. Existing AKS customer subscriptions will be given a quota limit at or above their current usage, depending on region availability. Once quota is enabled, customers can view their available quota and request quota increases in the Quotas page in the Azure Portal or by using the Quotas REST API. For details on how to view and request quota increases via the Portal Quotas page, visit Azure Quotas. For details on how to view and request quota increases via the Quotas REST API, visit: Azure Quota REST API Reference. New AKS customer subscriptions will be given a default limit upon new subscription creation. More information on the default limits for new subscriptions is available in documentation here.
• Starting on 17 June 2025, AKS will no longer create new node images for Ubuntu 18.04 or provide security updates. Existing node images will be deleted. Your node pools will be unsupported and you will no longer be able to scale. To avoid service disruptions, scaling restrictions, and remain supported, please follow our instructions to upgrade to a supported Kubernetes version.
• Teleport (preview) on AKS will be retired on 15 July 2025, please migrate to Artifact Streaming (preview) on AKS or update your node pools to set --aks-custom-headers EnableACRTeleport=false. Azure Container Registry has removed the Teleport API meaning that any nodes with Teleport enabled are pulling images from Azure Container Registry as any other AKS node. After 15 July 2025, any node pools with Teleport (preview) enabled may experience breakage and node provisioning failures. For more information, see aka.ms/aks/teleport-retirement.

Release Notes

• Preview Features

  • For clusters with Layer 7 policies with Advanced Container Networking Services enabled, a new metric proxy_datapath_update_timeout_total has been introduced in disabled by default mode.

• Features

  • Kubernetes 1.31 and 1.32 are now designated as Long-Term Support (LTS) versions.
  • Kubernetes 1.33 is available in Preview. A full matrix of supported add-ons and components is published at the AKS versions page.

• Bug Fixes

  • Fixed failures triggered by duplicate tag keys that differed only by character case.

• Behavior Changes

  • Static egress gateway memory limits increased from 128Mi to 500Mi for greater stability.
  • Memory for Azure Monitor Container Insights container ama-logs increased from 750Mi to 1Gi.
  • Credential provider always uses ACR audience token instead of ARM audience token to enhance the security of image pulling from Azure Container Registry.

• Component Updates

  • Updated Node Auto Provisioning to use karpenter-provider-azure release v1.4.0.
  • Updated Azure Monitor Container Insights images to 3.1.27 for both Linux and Windows.
  • Updated the Windows GPU device-plugin to v0.0.19, mitigating CVE-2025-22871.
  • Windows node images
    • Server 2019 Gen1 – 17763.7240.250416
    • Server 2022 Gen1/Gen2 – 20348.3561.250416
    • Server 23H2 Gen1/Gen2 – 25398.1551.250416
  • AKS Azure Linux v2 image has been updated to 202505.14.0.
  • AKS Azure Linux v3 image has been updated to 202505.14.0.
  • AKS Ubuntu 22.04 node image has been updated to 202505.14.0.
  • AKS Ubuntu 24.04 node image has been updated to 202505.14.0.
  • Azure Disk CSI driver updated to versions v1.30.12, v1.31.9, v1.32.5 on AKS versions 1.30, 1.31, and 1.32 respectively.
  • Azure Blob CSI driver updated to versions v1.25.6 and v1.26.3 on AKS versions 1.31 and 1.32 respectively
  • Azure File CSI driver v1.32.2 for AKS 1.32
  • Updated cloud-node-manager to v1.32.5
  • Updated cloud-controller-manager to v1.31.6
  • Updated acr-credential-provider to v1.29.15
  • Static egress gateway images updated to v0.0.21.
  • Updated Azure Policy add-on image to v1.11. Gatekeeper updated to v3.19.1.