Back up SAP HANA databases in Azure VMs

SAP HANA databases are critical workloads that require a low recovery-point objective (RPO) and long-term retention. You can back up SAP HANA databases running on Azure virtual machines (VMs) by using Azure Backup.

This article shows how to back up SAP HANA databases that are running on Azure VMs to an Azure Backup Recovery Services vault.

In this article, you will learn how to:

  • Create and configure a vault
  • Discover databases
  • Configure backups
  • Run an on-demand backup job

Note

Soft delete for SQL server in Azure VM and soft delete for SAP HANA in Azure VM workloads is now available in preview.
To sign up for the preview, write to us at AskAzureBackupTeam@microsoft.com

Prerequisites

Refer to the prerequisites and setting up permissions sections to set up the database for backup.

Set up network connectivity

For all operations, the SAP HANA VM requires connectivity to Azure public IP addresses. VM operations (database discovery, configure backups, schedule backups, restore recovery points, and so on) fail without connectivity to Azure public IP addresses.

Establish connectivity by using one of the following options:

Allow the Azure datacenter IP ranges

This option allows the IP ranges in the downloaded file. To access a network security group (NSG), use the Set-AzureNetworkSecurityRule cmdlet. If your safe recipients list only includes region-specific IPs, you'll also need to update the safe recipients list the Azure Active Directory (Azure AD) service tag to enable authentication.

Allow access using NSG tags

If you use NSG to restrict connectivity, then you should use AzureBackup service tag to allows outbound access to Azure Backup. In addition, you should also allow connectivity for authentication and data transfer by using rules for Azure AD and Azure Storage. This can be done from the Azure portal or via PowerShell.

To create a rule using the portal:

  1. In All Services, go to Network security groups and select the network security group.
  2. Select Outbound security rules under Settings.
  3. Select Add. Enter all the required details for creating a new rule as described in security rule settings. Ensure the option Destination is set to Service Tag and Destination service tag is set to AzureBackup.
  4. Click Add, to save the newly created outbound security rule.

To create a rule using PowerShell:

  1. Add Azure account credentials and update the national clouds
    Add-AzureRmAccount

  2. Select the NSG subscription
    Select-AzureRmSubscription "<Subscription Id>"

  3. Select the NSG
    $nsg = Get-AzureRmNetworkSecurityGroup -Name "<NSG name>" -ResourceGroupName "<NSG resource group name>"

  4. Add allow outbound rule for Azure Backup service tag
    Add-AzureRmNetworkSecurityRuleConfig -NetworkSecurityGroup $nsg -Name "AzureBackupAllowOutbound" -Access Allow -Protocol * -Direction Outbound -Priority <priority> -SourceAddressPrefix * -SourcePortRange * -DestinationAddressPrefix "AzureBackup" -DestinationPortRange 443 -Description "Allow outbound traffic to Azure Backup service"

  5. Add allow outbound rule for Storage service tag
    Add-AzureRmNetworkSecurityRuleConfig -NetworkSecurityGroup $nsg -Name "StorageAllowOutbound" -Access Allow -Protocol * -Direction Outbound -Priority <priority> -SourceAddressPrefix * -SourcePortRange * -DestinationAddressPrefix "Storage" -DestinationPortRange 443 -Description "Allow outbound traffic to Azure Backup service"

  6. Add allow outbound rule for AzureActiveDirectory service tag
    Add-AzureRmNetworkSecurityRuleConfig -NetworkSecurityGroup $nsg -Name "AzureActiveDirectoryAllowOutbound" -Access Allow -Protocol * -Direction Outbound -Priority <priority> -SourceAddressPrefix * -SourcePortRange * -DestinationAddressPrefix "AzureActiveDirectory" -DestinationPortRange 443 -Description "Allow outbound traffic to AzureActiveDirectory service"

  7. Save the NSG
    Set-AzureRmNetworkSecurityGroup -NetworkSecurityGroup $nsg

Allow access by using Azure Firewall tags. If you're using Azure Firewall, create an application rule by using the AzureBackup FQDN tag. This allows outbound access to Azure Backup.

Deploy an HTTP proxy server to route traffic. When you back up an SAP HANA database on an Azure VM, the backup extension on the VM uses the HTTPS APIs to send management commands to Azure Backup and data to Azure Storage. The backup extension also uses Azure AD for authentication. Route the backup extension traffic for these three services through the HTTP proxy. The extensions are the only component that's configured for access to the public internet.

Connectivity options include the following advantages and disadvantages:

Option Advantages Disadvantages
Allow IP ranges No additional costs Complex to manage because the IP address ranges change over time

Provides access to the whole of Azure, not just Azure Storage
Use NSG service tags Easier to manage as range changes are automatically merged

No additional costs

Can be used with NSGs only

Provides access to the entire service
Use Azure Firewall FQDN tags Easier to manage as the required FQDNs are automatically managed Can be used with Azure Firewall only
Use an HTTP proxy Granular control in the proxy over the storage URLs is allowed

Single point of internet access to VMs

Not subject to Azure IP address changes
Additional costs to run a VM with the proxy software

Onboard to the public preview

Onboard to the public preview as follows:

  • In the portal, register your subscription ID to the Recovery Services service provider by following this article.

  • For 'Az' module in PowerShell, run this cmdlet . It should complete as "Registered".

    Register-AzProviderFeature -FeatureName "HanaBackup" –ProviderNamespace Microsoft.RecoveryServices
    
  • If you are using 'AzureRM' module in PowerShell, run this cmdlet. It should complete as "Registered".

    Register-AzureRmProviderFeature -FeatureName "HanaBackup" –ProviderNamespace Microsoft.RecoveryServices
    

Create a Recovery Services vault

A Recovery Services vault is an entity that stores backups and recovery points created over time. The Recovery Services vault also contains the backup policies that are associated with the protected virtual machines.

To create a Recovery Services vault, follow these steps.

  1. Sign in to your subscription in the Azure portal.

  2. On the left menu, select All services.

    Select All services

  3. In the All services dialog box, enter Recovery Services. The list of resources filters according to your input. In the list of resources, select Recovery Services vaults.

    Enter and choose Recovery Services vaults

    The list of Recovery Services vaults in the subscription appears.

  4. On the Recovery Services vaults dashboard, select Add.

    Add a Recovery Services vault

    The Recovery Services vault dialog box opens. Provide values for the Name, Subscription, Resource group, and Location.

    Configure the Recovery Services vault

    • Name: Enter a friendly name to identify the vault. The name must be unique to the Azure subscription. Specify a name that has at least 2 but not more than 50 characters. The name must start with a letter and consist only of letters, numbers, and hyphens.

    • Subscription: Choose the subscription to use. If you're a member of only one subscription, you'll see that name. If you're not sure which subscription to use, use the default (suggested) subscription. There are multiple choices only if your work or school account is associated with more than one Azure subscription.

    • Resource group: Use an existing resource group or create a new one. To see the list of available resource groups in your subscription, select Use existing, and then select a resource from the drop-down list. To create a new resource group, select Create new and enter the name. For more information about resource groups, see Azure Resource Manager overview.

    • Location: Select the geographic region for the vault. To create a vault to protect virtual machines, the vault must be in the same region as the virtual machines.

      Important

      If you're not sure of the location of your VM, close the dialog box. Go to the list of virtual machines in the portal. If you have virtual machines in several regions, create a Recovery Services vault in each region. Create the vault in the first location, before you create the vault for another location. There's no need to specify storage accounts to store the backup data. The Recovery Services vault and Azure Backup handle that automatically.

  5. When you're ready to create the Recovery Services vault, select Create.

    Create the Recovery Services vault

    It can take a while to create the Recovery Services vault. Monitor the status notifications in the Notifications area at the upper-right corner of the portal. After your vault is created, it's visible in the list of Recovery Services vaults. If you don't see your vault, select Refresh.

    Refresh the list of backup vaults

Discover the databases

  1. In the vault, in Getting Started, click Backup. In Where is your workload running?, select SAP HANA in Azure VM.

  2. Click Start Discovery. This initiates discovery of unprotected Linux VMs in the vault region.

    • After discovery, unprotected VMs appear in the portal, listed by name and resource group.
    • If a VM isn't listed as expected, check whether it's already backed up in a vault.
    • Multiple VMs can have the same name but they belong to different resource groups.
  3. In Select Virtual Machines, click the link to download the script that provides permissions for the Azure Backup service to access the SAP HANA VMs for database discovery.

  4. Run the script on each VM hosting SAP HANA databases that you want to back up.

  5. After running the script on the VMs, in Select Virtual Machines, select the VMs. Then click Discover DBs.

  6. Azure Backup discovers all SAP HANA databases on the VM. During discovery, Azure Backup registers the VM with the vault, and installs an extension on the VM. No agent is installed on the database.

    Discover SAP HANA databases

Configure backup

Now enable backup.

  1. In Step 2, click Configure Backup.

    Configure Backup

  2. In Select items to back up, select all the databases you want to protect > OK.

    Select items to back up

  3. In Backup Policy > Choose backup policy, create a new backup policy for the databases, in accordance with the instructions below.

    Choose backup policy

  4. After creating the policy, on the Backup menu, click Enable backup.

    Enable backup

  5. Track the backup configuration progress in the Notifications area of the portal.

Create a backup policy

A backup policy defines when backups are taken, and how long they're retained.

  • A policy is created at the vault level.
  • Multiple vaults can use the same backup policy, but you must apply the backup policy to each vault.

Specify the policy settings as follows:

  1. In Policy name, enter a name for the new policy.

    Enter policy name

  2. In Full Backup policy, select a Backup Frequency, choose Daily or Weekly.

    • Daily: Select the hour and time zone in which the backup job begins.
      • You must run a full backup. You can't turn off this option.
      • Click Full Backup to view the policy.
      • You can't create differential backups for daily full backups.
    • Weekly: Select the day of the week, hour, and time zone in which the backup job runs.

    Select backup frequency

  3. In Retention Range, configure retention settings for the full backup.

    • By default all options are selected. Clear any retention range limits you don't want to use, and set those that you do.
    • The minimum retention period for any type of backup (full/differential/log) is seven days.
    • Recovery points are tagged for retention based on their retention range. For example, if you select a daily full backup, only one full backup is triggered each day.
    • The backup for a specific day is tagged and retained based on the weekly retention range and setting.
    • The monthly and yearly retention ranges behave in a similar way.
  4. In the Full Backup policy menu, click OK to accept the settings.

  5. Select Differential Backup to add a differential policy.

  6. In Differential Backup policy, select Enable to open the frequency and retention controls.

    • At most, you can trigger one differential backup per day.
    • Differential backups can be retained for a maximum of 180 days. If you need longer retention, you must use full backups.

    Differential backup policy

    Note

    Incremental backups aren't currently supported.

  7. Click OK to save the policy and return to the main Backup policy menu.

  8. Select Log Backup to add a transactional log backup policy,

    • In Log Backup, select Enable. This cannot be disabled as SAP HANA manages all log backups.
    • Set the frequency and retention controls.

    Note

    Log backups only begin to flow after a successful full backup is completed.

  9. Click OK to save the policy and return to the main Backup policy menu.

  10. After you finish defining the backup policy, click OK.

Note

Each log backup is chained to the previous full backup to form a recovery chain. This full backup will be retained until the retention of the last log backup has expired. This might mean that the full backup is retained for an extra period to make sure all the logs can be recovered. Let’s assume user has a weekly full backup, daily differential and 2 hour logs. All of them are retained for 30 days. But, the weekly full can be really cleaned up/deleted only after the next full backup is available i.e., after 30 + 7 days. Say, a weekly full backup happens on Nov 16th. As per the retention policy, it should be retained until Dec 16th. The last log backup for this full happens before the next scheduled full, on Nov 22nd. Until this log is available until Dec 22nd, the Nov 16th full can't be deleted. So, the Nov 16th full is retained until Dec 22nd.

Run an on-demand backup

Backups run in accordance with the policy schedule. You can run a backup on-demand as follows:

  1. In the vault menu, click Backup items.
  2. In Backup Items, select the VM running the SAP HANA database, and then click Backup now.
  3. In Backup Now, use the calendar control to select the last day that the recovery point should be retained. Then click OK.
  4. Monitor the portal notifications. You can monitor the job progress in the vault dashboard > Backup Jobs > In progress. Depending on the size of your database, creating the initial backup may take a while.

Run SAP HANA Studio backup on a database with Azure Backup enabled

If you want to take a local backup (using HANA Studio) of a database that's being backed up with Azure Backup, do the following:

  1. Wait for any full or log backups for the database to finish. Check the status in SAP HANA Studio / Cockpit.
  2. Disable log backups, and set the backup catalog to the file system for relevant database.
  3. To do this, double-click systemdb > Configuration > Select Database > Filter (Log).
  4. Set enable_auto_log_backup to No.
  5. Set log_backup_using_backint to False.
  6. Take an on-demand full backup of the database.
  7. Wait for the full backup and catalog backup to finish.
  8. Revert the previous settings back to those for Azure:
    • Set enable_auto_log_backup to Yes.
    • Set log_backup_using_backint to True.

Next steps