Is there a viable AKS configuration using b1s VM size?

Question

I'm trying to use the free B1s series VM size when deploying AKS clusters but it seems impossible to use the B1s node size due to ram limitations -

Changing node number doesn't affect this so I assume the requirement is now 4GiB per node.

Answer 1

@Radek Hromadka Thanks for posting your query on Microsoft Q&A.

The B1s VM size has only 1 GiB of memory, which is not sufficient to run the Kubernetes system pods and your application pods. AKS requires nodes to use VM sizes with at least 2 vCPUs and 4 GiB of memory(RAM) to ensure that the required kube-system pods and your applications can be reliably scheduled. Therefore, you cannot use the B1s VM size for AKS clusters.

You need to select an instance with at least 4 GiB of memory as also shared in the error message.

Currently, the cheapest is Standard_B2s with 4 GiB RAM. You can also sort it directly in the Azure portal.

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