04/07/2023, 8:37 AM
Hi all, we are going to migrate our platform to Rancher using Rancher Lunched AKS clusters and we have a few concerns that we would like to address: • When is Rancher 2.7.1 going to be released? The Rancher support matrix for 2.7.1 shows k8s v1.24.6 as the highest supported version and Azure will drop AKS v1.24 in a few months... Should this be a concern for us? What could happen if we create our cluster with Rancher for an unsupported K8s version? 1.25 for example. • If we move to AKS imported clusters, in case we add node pools, and upgrade the cluster, will those changes be reflected in the Rancher Platform? • If we face some issues by running an unsupported K8s version on Rancher Launched K8s clusters, is it possible to remove it from Rancher, do stuff we need and then import it into the platform? • It looks like AKS is faster than Rancher regarding supported Kubernetes versions... We would like to know if Rancher will always be on track with AKS regarding the removal of K8s version support and new versions. • What are exactly the big differences between imported AKS and Rancher-launched AKS? What should we look at, and what issues can we face when using one or another? Thanks! 🙂


04/07/2023, 10:39 AM
I can't answer most of your questions, but I can tell you 2.7.2 is supposed to add support for newer versions of Kubernetes. I can also tell you the reason is that Pod Security Policies (PSPs) went away in Kubernetes 1.25 and that was a very big change and that's why it's taking a while. If I recall correctly the PSP replacement was first available in either 1.22 or 1.23, so likely those will be the minimum version for Rancher 2.7.2 also.


04/12/2023, 7:06 PM
Does Rancher AKS Launched cluster support manual AKS k8S version upgrade ?


04/12/2023, 8:59 PM
HI @most-sunset-36476. AKS clusters can be updated manually. Have a look at this and let me know if this is what you are referring to:

Regarding the other questions you mention. Some comments: • 2.7.1 is already live and 2.7.2 will be released soon (in April) • You are never left alone. All the ecosystem tries to follow the Kubernetes release cycle and so do we. You can be sure that when AKS supports 1.25 there'll be a Rancher version that will support 1.25. • 2.7.2 (this month) will bring support for k8s 1.25 • The AKS integration is bidirectional. Any change done with Rancher to the AKS configs, size, k8s version.0.. will be automatically visible on your Azure console and vice versa.
• Yes, you can remove clusters from Rancher Management and add the back later on. • You should not be worried. As I explained AKS support for 1.25 and Rancher support for 1.25 may not happen exactly the same day but should always happen within a reasonable timeframe. • There are no differences between imported AKS clusters and Rancher deployed AKS clusters. Rancher uses the Azure API. You can also import and AKS cluster as a generic cluster but I can't think of any reason to do that (there are no benefits and you loose the value of being able not to just deploy and manage workloads but also changing configs, add/remove nodes, ...)


04/13/2023, 8:38 PM
@quick-sandwich-76600 Thank you very much for your answers! 🙂
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