Nazaj

Naprej

Try-This exercise - Configure storage for applications that run on Azure Kubernetes Service

Completed

In this exercise, you step through the process of configuring a persistent volume for a pod on an AKS cluster. You use the AKS cluster provisioned in the first exercise of this module.

Note

To complete this exercise, you need an Azure Subscription.

Create a custom storage class in an AKS cluster

In this task, you create a custom storage class in the target AKS cluster.

1. In the Azure portal, in the Bash session of Azure Cloud Shell, use the built-in editor to create a file named premium-storage-class.yaml and copy into it the following YAML manifest:

   apiVersion: storage.k8s.io/v1
   kind: StorageClass
   metadata:
     name: managed-premium-retain
   provisioner: disk.csi.azure.com
   parameters:
     skuName: Premium_LRS
   reclaimPolicy: Retain
   volumeBindingMode: WaitForFirstConsumer
   allowVolumeExpansion:
   

   Note

   The reclaimPolicy is set to Retain.
   

2. Save the changes to the file and close it to return to the Bash prompt.

3. To create the custom storage class, from the Bash session in the Azure Cloud Shell, run the following command:

   kubectl apply -f premium-storage-class.yaml
   

Create a persistent volume claim in an AKS cluster

In this task, you create a persistent volume claim in the target AKS cluster.

1. From the Bash session in the Azure Cloud Shell, use the built-in editor to create a file named persistent-volume-claim-5g.yaml and copy into it the following YAML manifest:

   apiVersion: v1
   kind: PersistentVolumeClaim
   metadata:
     name: azure-managed-disk
   spec:
     accessModes:
     - ReadWriteOnce
     storageClassName: managed-premium-retain
     resources:
       requests:
         storage: 5Gi
   

   Note

   The storageClassName is set to managed-premium-retain.
   

2. Save the changes to the file and close it to return to the Bash prompt.

3. To create the persistent volume claim, from the Bash session in the Azure Cloud Shell, run the following command:

   kubectl apply -f persistent-volume-claim-5g.yaml
   

Deploy a pod with a persistent volume mount in an AKS cluster

In this task, you deploy a pod with a persistent volume mount in the target AKS cluster.

1. From the Bash session in the Azure Cloud Shell, use the built-in editor to create a file named pod-with-storage-mount.yaml and copy into it into the following YAML manifest:

   kind: Pod
   apiVersion: v1
   metadata:
     name: nginx
   spec:
     containers:
       - name: myfrontend
         image: mcr.microsoft.com/oss/nginx/nginx:1.15.5-alpine
         volumeMounts:
         - mountPath: "/mnt/azure"
           name: volume
     volumes:
       - name: volume
         persistentVolumeClaim:
           claimName: azure-managed-disk
   

   Note

   The mountPathis set to /mnt/azure and claimNameis set to azure-managed-disk.
   

2. Save the changes to the file and close it to return to the Bash prompt.

3. To deploy the pod, from the Bash session in the Azure Cloud Shell, run the following command:

   kubectl apply -f pod-with-storage-mount.yaml
   

Validate the effect of the volume mount

In this task, you validate that the volume mount was successful.

1. To verify that the nginx pod was provisioned, from the Bash session in the Azure Cloud Shell, run the following command:

   kubectl get pods
   

2. To list the content of the /mnt/azure directory, run the following command:

   kubectl exec -i nginx -- sh -c "ls /mnt/azure"
   

3. To delete the nginx pod, run the following command:

   kubectl delete pod nginx
   

4. Now, re-create the nginx pod by running the following command:

   kubectl apply -f pod-with-storage-mount.yaml
   

5. Finally, verify that the content of the mount is intact by running the following command:

   kubectl exec -i nginx -- sh -c "ls /mnt/azure"
   

Delete the resources provisioned in the exercise

In this task, you delete the resources you provisioned in this exercise.

1. To list and delete the persistent volume claim, from the Bash session in the Azure Cloud Shell, run the following commands:

   kubectl get pvc
   kubectl delete pvc azure-managed-disk
   

   Note

   Alternatively, you could run kubectl delete -f persistent-volume-claim-5g.yaml
   

2. To list and delete the storage class, run the following commands:

   kubectl get sc
   kubectl delete sc managed-premium-retain
   

Continue