Azure Kubernetes Service Changelog

Releases

Release 2019-01-31

• Kubernetes 1.12.4 GA Release
  • With the release of 1.12.4 Kubernetes 1.8 support has been removed, you will need to upgrade to at least 1.9.x
• CoreDNS support GA release
  • Conversion from kube-dns to CoreDNS completed, CoreDNS is the default for all new 1.12.4+ AKS clusters.
  • If you are using configmaps or other tools for kube-dns modifications, you will need to be adjust them to be CoreDNS compatible.
    • The CoreDNS add-on is set to reconcile which means modifications to the deployments will be discarded.
    • We have identified two issues with this release that will be resolved in a hot fix begining rollout this week:
      • https://github.com/Azure/AKS/issues/811 (kube-dns config map not compatible with CoreDNS)
      • https://github.com/Azure/AKS/issues/812 (kube-dns/coreDNS autoscaler conflicts)
• Kube-dns (pre 1.12) / CoreDNS (1.12+) autoscaler(s) are enabled by default, this should resolve the DNS timeout and other issues related to DNS queries overloading kube-dns.
  • In order to get the dns-autoscaler, you must perform an AKS cluster upgrade to a later supported release (clusters prior to 1.12 will continue to get kube-dns, with kube-dns autoscale)
• Users may now self update/rotate Security Principal credentials using the Azure CLI
• Additional non-user facing stability and reliability service enhancements
• New Features in Preview
  • Note: Features in preview are considered beta/non-production ready and unsupported. Please do not enable these features on production AKS clusters.
  • Cluster Autoscaler / Virtual machine Scale Sets
  • Kubernetes Audit Log
  • Network Policies/Network Security Policies
    • This means you can now use calico as a valid entry in addition to azure when creating clusters using Advanced Networking
    • There is a known issue when using Network Policies/calico that prevents exec into the cluster containers which will be fixed in the next release
  • For all product / feature previews including related projects, see this document.

For additional information or extended release notes, please see the CHANGELOG