Use the Azure CLI to enable double encryption at rest for managed disks
Applies to: ✔️ Linux VMs ✔️ Flexible scale sets
Azure Disk Storage supports double encryption at rest for managed disks. For conceptual information on double encryption at rest, and other managed disk encryption types, see the Double encryption at rest section of our disk encryption article.
Double encryption at rest isn't currently supported with either Ultra Disks or Premium SSD v2 disks.
Create an instance of Azure Key Vault and encryption key.
When creating the Key Vault instance, you must enable soft delete and purge protection. Soft delete ensures that the Key Vault holds a deleted key for a given retention period (90 day default). Purge protection ensures that a deleted key can't be permanently deleted until the retention period lapses. These settings protect you from losing data due to accidental deletion. These settings are mandatory when using a Key Vault for encrypting managed disks.
subscriptionId=yourSubscriptionID rgName=yourResourceGroupName location=westcentralus keyVaultName=yourKeyVaultName keyName=yourKeyName diskEncryptionSetName=yourDiskEncryptionSetName diskName=yourDiskName az account set --subscription $subscriptionId az keyvault create -n $keyVaultName -g $rgName -l $location --enable-purge-protection true --enable-soft-delete true az keyvault key create --vault-name $keyVaultName -n $keyName --protection software
Get the key URL of the key you created with
az keyvault key show.
az keyvault key show --name $keyName --vault-name $keyVaultName
Create a DiskEncryptionSet with encryptionType set as EncryptionAtRestWithPlatformAndCustomerKeys. Replace
yourKeyURLwith the URL you received from
az keyvault key show.
az disk-encryption-set create --resource-group $rgName --name $diskEncryptionSetName --key-url yourKeyURL --source-vault $keyVaultName --encryption-type EncryptionAtRestWithPlatformAndCustomerKeys
Grant the DiskEncryptionSet resource access to the key vault.
It may take few minutes for Azure to create the identity of your DiskEncryptionSet in your Microsoft Entra ID. If you get an error like "Cannot find the Active Directory object" when running the following command, wait a few minutes and try again.
desIdentity=$(az disk-encryption-set show -n $diskEncryptionSetName -g $rgName --query [identity.principalId] -o tsv) az keyvault set-policy -n $keyVaultName -g $rgName --object-id $desIdentity --key-permissions wrapkey unwrapkey get
Now that you've created and configured these resources, you can use them to secure your managed disks. The following links contain example scripts, each with a respective scenario, that you can use to secure your managed disks.