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README.md

Topology(Availability Zone)

Topology is a GA feature since Kubernetes v1.17, refer to CSI Topology Feature for more details.

Check node topology after driver installation

In below example, there are two nodes with topology label: topology.disk.csi.azure.com/zone=eastus2-1

$ kubectl get no --show-labels | grep topo
k8s-agentpool-83483713-vmss000000   Ready    agent    62d   v1.16.2   ...topology.disk.csi.azure.com/zone=eastus2-1
k8s-agentpool-83483713-vmss000001   Ready    agent    62d   v1.16.2   ...topology.disk.csi.azure.com/zone=eastus2-1

if node is in non-zone, topology label topology.disk.csi.azure.com/zone would be empty

Use following storage class with topology support

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: managed-csi
provisioner: disk.csi.azure.com
parameters:
  skuname: StandardSSD_LRS  # available values: Standard_LRS, Premium_LRS, StandardSSD_LRS, UltraSSD_LRS, Premium_ZRS, StandardSSD_ZRS
reclaimPolicy: Delete
volumeBindingMode: Immediate

Follow azure disk dynamic provisioning

Continue step Create an azuredisk CSI PVC, refer to Basic usage

ZRS disk support

  • available version: v1.2.0+
  • current stage: Preview

ZRS(Premium_ZRS, StandardSSD_ZRS) disk could be scheduled on all zone and non-zone agent nodes, without the restriction that disk volume should be co-located in the same zone as a given node.

  • Register ZRS disk feature
az feature register --name SsdZrsManagedDisks --namespace Microsoft.Compute
az feature list -o table --query "[?contains(name, 'Microsoft.Compute/SsdZrsManagedDisks')].{Name:name,State:properties.state}"
az provider register --namespace Microsoft.Compute

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