Azure AKS (changelog)

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2019-04-15 · Release 2019-04-15 · 1y+

  • Kubernetes 1.13 is GA

  • The Kubernetes 1.9.x releases are now deprecated. All clusters on version 1.9 must be upgraded to a later release (1.10, 1.11, 1.12, 1.13) within 30 days. Clusters still on 1.9.x after 30 days (2019-05-25) will no longer be supported.

    • During the deprecation period, 1.9.x will continue to appear in the available versions list. Once deprecation is completed 1.9 will be removed.

  • (Region) North Central US is now available

  • (Region) Japan West is now available

  • New Features

    • Customers may now provide custom Resource Group names.
      • This means that users are no longer locked into the MC_* resource name group. On cluster creation you may pass in a custom RG and AKS will inherit that RG, permissions and attach AKS resources to the customer provided resource group.     * Currently, you must pass in a new RG (resource group) must be new, and can not be a pre-existing RG. We are working on support for pre-existing RGs.     * This change requires newly provisioned clusters, existing clusters can not be migrated to support this new capability. Cluster migration across subscriptions and RGs is not currently supported.
    • AKS now properly associates existing route tables created by AKS when passing in custom VNET for Kubenet/Basic Networking. This does not support User Defined / Custom routes (UDRs).

  • Bug fixes

    • An issue where two delete operations could be issued against a cluster simultaneously resulting in an unknown and unrecoverable state has been resolved.
    • An issue where users could create a new AKS cluster and set the maxPods value too low has been resolved.
      • Users have reported cluster crashes, unavailability and other issues when changing this setting. As AKS is a managed service, we provide sidecars and pods we deploy and manage as part of the cluster. However users could define a maxPods value lower than the value required for the managed pods to run (eg 30), AKS now calculates the minimum number of pods via: maxPods or maxPods * vm_count > managed add-on pods

  • Behavioral Changes   * AKS cluster creation now properly pre-checks the assigned service CIDR range to block against possible conflicts with the dns-service CIDR.    * As an example, a user could use 10.2.0.1/24 instead of 10.2.0.0/24 which would lead to IP conflicts. This is now validated/checked and if there is a conflict, a clear error is returned.   * AKS now correctly blocks/validates users who accidentally attempt an upgrade to a previous release (eg downgrade).

    • AKS now validate all CRUD operations to confirm the requested action will not fail due to IP Address/subnet exhaustion. If a call is made that would exceed available addresses, the service correctly returns an error.
    • The amount of memory allocated to the Kubernetes Dashboard has been increased to 500Mi for customers with large numbers of nodes/jobs/objects.
    • Small VM SKUs (such as Standard F1, and A2) that do not have enough RAM to support the Kubernetes control plane components have been removed from the list of available VMs users can use when creating AKS clusters.

  • Preview Features

    • A bug where Calico pods would not start after a 1.11 to 1.12 upgrade has been resolved.
    • When using network policies and Calico, AKS now properly uses Azure CNI for all routing vs defaulting to using Calico the routing plugin.
    • Calico has been updated to v3.5.0

  • Component Updates