Azure/AKS 2021-01-04

Release 2021-01-04

on GitHub

This release is rolling out to all regions - ETA for conclusion 2021-01-13 for public cloud.

Announcements

• The Azure Kubernetes Service pod security policy (preview) feature will be retired on May 31st, 2021.
• Once GA AKS will default to its new GPU specialized image as the supported option for GPU-capable agent nodes.
• AKS has defaulted Azure CNI to transparent mode (from its previous default of bridge mode). This should bring no impact and carries several benefits, read more about it here
• As previously announced, with the Holiday Season ending AKS will deprecate Kubernetes v1.16, completing the extension given after the GA of v1.19 for the holiday season and returning to the regular 3 supported versions window. After the week of January 31st, 2021 you will no longer be able to create v1.16.x based clusters or node pools.

Release Notes

• Features
  • AKS now supports every CPU-based SKU dynamically. This means that every new CPU-based SKU is automatically supported by AKS so long they're not on the restrictions list. GPU-based SKUs and other specialty SKUs still require additional validation before being enabled
  • AKS Cluster Auto-Scaler now exposes the max-node-provision-time and priority properties as part of the Cluster Auto-Scaler profile.
• Bug Fixes
  • Fixed edge case on Bring your own subnet + kubenet network plugin scenarios where the route table was not correctly associated before the nodes started being created.
  • Better handling of race condition with liveness probes of the aks-link component.
  • Cluster Auto-Scaler bug fix for incorrectly reading the value of new-pod-scale-up and improvements to CA liveness probe.
  • Case insensitivity fix for networkPlugin, networkPolicyandloadbalancerSku`.
  • Bug fixed on BYO Route Table kubenet scenarios where the cluster deletion didn't correctly clean up the route table rules created by kubernetes.
• Preview Features
  • Cluster Start/Stop now works in clusters with Cluster Auto-Scaler enabled and Private clusters.
• Component Updates
  • AKS Windows image has been updated to 2019-datacenter-core-smalldisk-17763.1579.201208.
  • AKS Ubuntu 16.04 image updated to AKSUbuntu-1604-2020.12.15.
  • AKS Ubuntu 18.04 image updated to AKSUbuntu-1804-2020.12.15.
  • Updated Azure CNI plugin version for Linux and Windows to 1.2 - https://github.com/Azure/azure-container-networking/releases.