Azure Kubernetes Service - Increase Windows disk space - azure

Question

I'd like to host Windows containers, which act as build agents, at an Azure Kubernetes Service instance - unfortunately I can't increase the default 20GB pod disk space. I'd need more disk space for running build jobs at the pods.
The pod is getting deployed using an ADO pipeline by applying YAML which describes the workload.
Attaching the pod, and proving the disk space results in following:
PS: C:\ Get-PSDrive C
Name Used (GB) Free (GB) Provider Root
---- --------- --------- -------- ----
C 0.31 19.57 FileSystem C:\
Does anybody know how to increase the disk space?
At our on-premise cluster it is possible by adding
--storage-opt 50G
as parameter with regard to the modified Docker service parameter.
But how does it work for AKS?
Thank you a lot in advance!

Answer 1

We can increase the pod disk size in AKS by creating the disks manually using persistent volume
By default disk size will be 4GiB
For me its 30GiB, I increased to 50GiB
To increase the disk size please follow the below steps
I have created the storage class for disk
vi sc.yaml
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
name: azuredisk-premium-retain
provisioner: kubernetes.io/azure-disk
reclaimPolicy: Retain
volumeBindingMode: WaitForFirstConsumer
allowVolumeExpansion: true
parameters :
storageaccounttype: Premium_LRS
kind: Managed
To deploy the Storage class use below command
kubectl apply -f sc.yaml
Please use the below command to check the storage class created or not
kubectl get sc
I have created the persistent volume to to create the disk manually
vi pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: azure-managed-disk-pvc
spec:
accessModes:
- ReadWriteOnce
storageClassName: azuredisk-premium-retain
resources:
requests:
storage: 50GiB
In the pvc file i am increasing the storage to 50GiB
To deploy the PVC use below commands
kubectl apply -f pvc.yaml
kubectl get pvc
I have created the pod for mounting the volume
vi pod.yaml
kind: Pod
apiVersion: v1
metadata:
name: newpod #pod name
spec:
containers:
- name: newpod
image: nginx:latest
volumeMounts:
- mountPath: "/mnt/azure" # mounting the volume
name: volume
volumes:
- name: volume
persistentVolumeClaim:
claimName: azure-managed-disk-pvc
To deploy the pod
kubectl apply -f pod.yaml
kubectl get pods
After deploying the pvc_file Go-To>portal>disks>search with pvc_name you created, disk will be increased with created with 50GiB
Previously it was 30GiB now it increased to 50GiB
NOTE : we cannot decrease the disk size once it increase
Reference:
MS-DOC