Azure/AKS 2020-10-12

Release 2020-10-12

on GitHub

This release is rolling out to all regions - ETA for conclusion 2020-10-22

Announcements

• AKS and Holiday Season: To ease the burden of upgrade and change during the holiday season, AKS is extending a limited scope of support for all clusters and node pools on 1.16 as a courtesy. Customers with clusters and node pools on 1.16 after the announced deprecation date of 2020-11-30 will be granted an extension of capabilities outside the usual scope of support for deprecated versions.
  The scope of this limited extension is effective from '2020-11-30 to 2021-01-31' and is limited to the following:
  • Creation of new clusters and node pools on 1.16.
  • Scale, Update, Upgrade and Delete operations on 1.16 clusters.
  • Azure Support of non-Kubernetes related, platform issues. Platform issues include trouble with networking, storage, or compute running on Azure. Any support requests for K8s patching and troubleshooting will be requested to upgrade into a supported version.
• AKS will default to containerd as the default runtime on kubernetes v1.19+ after this feature GAs. During preview we encourage to create node pools with the new container runtime to validate workloads still work as expected. And do check the containerd differences and limitations. After GA of kubernetes v1.19, containerd will be served by default for all new clusters or cluster that upgrade to v1.19. If you are doing container builds in cluster please use the recommended docker buildx.
• After the GA of Ephemeral OS and release of the 2020-11-01 AKS API version. Clusters and node pools will be created by default with Ephemeral OS. You can still select managed disks explicitly if you prefer that option. See more at https://aka.ms/aks/ephemeral-os.
• The Azure Kubernetes Service pod security policy (preview) feature will be retired on February 1st 2021.
• Once GA AKS will default to its new GPU specialized image as the supported option for GPU-capable agent nodes.

Release Notes

• Features
  • You can now mutate the AKS default storage class. See how here https://docs.microsoft.com/en-us/azure/aks/azure-disks-dynamic-pv
  • AKS now supports Dv4 and DSv4 VM SKU.
• Bug Fixes
  • Fixed bug that allow setting unsupported labels. Unsupported labels are now blocked as per: https://github.com/kubernetes/enhancements/blob/master/keps/sig-auth/0000-20170814-bounding-self-labeling-kubelets.md#proposal
  • Fixed an issue with Managed-AAD and kubernetes v1.19 preview. Closes #1891
  • Fixed an issue where topology labels where not correctly preserved after upgrade.
  • Fixed an issue where only the original subnet CIDR was added to the Windows nodes exception list. Fixes #1859
• Behavior change
  • The calico-typha deployment is now called calico-typha-deployment.
  • The revisionHistoryLimit is now set to 2 for managed components and addon deployments. Closes #1502
• Component Updates
  • AKS Ubuntu 16.04 image updated to AKSUbuntu-1604-2020.10.08.
  • AKS Ubuntu 18.04 image release notes: AKSUbuntu-1804-2020.10.08.