The in tree storage drivers for Kubernetes is planned to be removed in version 1.26-1.27. The new Container Storage Interface(CSI) is the way forward for handling persistent storage inside Kubernetes and it’s been GA since 1.13. For Azure disk the in tree driver is deprecated since 1.19.
Recently I’ve setup a new AKS cluster and the documentation how to setup and azure static disk volume with Azure disk CSI was a bit hard to find. So I’ll document how I did here.
Create the static disk
The official docs recommends to create disk in the node resource group of your AKS cluster.
az disk create \
--resource-group my-node-resource-group \
--name disk-aks-something \
--location swedencentral \
--os-type linux \
--sku Premium_LRS \
--size-gb 8 \
--query id --output tsv
This command will output the disk id that you’ll use for as the volumeHandle in the next step.
Add the persistent volume
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv-my-volume
spec:
capacity:
storage: 8Gi
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
csi:
driver: disk.csi.azure.com
readOnly: false
volumeHandle: /subscriptions/subscription-id/my-node-resource-group/my-resource-group/providers/Microsoft.Compute/disks/disk-aks-something
volumeAttributes:
fsType: ext4
#partition: "1" # optional, remove this if there is no partition
Add the persistent volume claim
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: pvc-my-volume
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 8Gi
volumeName: pv-my-volume
storageClassName: ""
Add the pvc to your pod
kind: Pod
apiVersion: v1
metadata:
name: nginx-azuredisk
spec:
nodeSelector:
kubernetes.io/os: linux
containers:
- image: mcr.microsoft.com/oss/nginx/nginx:1.17.3-alpine
name: nginx-azuredisk
command:
- "/bin/sh"
- "-c"
- while true; do echo $(date) >> /mnt/azuredisk/outfile; sleep 1; done
volumeMounts:
- name: azuredisk01
mountPath: "/mnt/azuredisk"
volumes:
- name: azuredisk01
persistentVolumeClaim:
claimName: pvc-my-volume
And that’s it!
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