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Azure / AKS

Azure Kubernetes Service
https://azure.github.io/AKS/
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[Feature] Nodepool VMSS OS disk size increase #4529

Open yanchenzhang0304 opened 2 months ago

yanchenzhang0304 commented 2 months ago

Provide an API to update nodepool OS disk size in place honoring PDBs and gradually updating the VMs.

yanchenzhang0304 commented 2 months ago

Increasing the OS disk size should be allowed, but decreasing it is not allowed.

PixelRobots commented 2 months ago

As this would require each node to update, you can just create a new node pool with the correct size and then migrate the workloads in your own time to reduce any downtime.

I am not sure this feature would be needed. Can you give more information as to why you would need this feature?

yanchenzhang0304 commented 2 months ago

As this would require each node to update, you can just create a new node pool with the correct size and then migrate the workloads in your own time to reduce any downtime.

I am not sure this feature would be needed. Can you give more information as to why you would need this feature?

Just like the feat https://github.com/Azure/AKS/issues/4485, we want to update the vmss configuration via in-place update rather than nodepool rotation. In-place changes have less impact on services, and the upgrade process is smoother (no need for users to implement graceful drain).