One of the key responsibilities of a Backup or Compliance Admin in an organization is to ensure that all business-critical machines are backed up with the appropriate retention.
Today, Azure Backup provides a variety of built-in policies (using Azure Policy) to help you automatically ensure that your Azure virtual machines are configured for backup. Depending on how your backup teams and resources are organized, you can use any one of the below policies:
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Policy 1 – Configure backup on VMs without a given tag to an existing recovery services vault in the same location
If your organization has a central backup team that manages backups across application teams, you can use this policy to configure backup to an existing central Recovery Services vault in the same subscription and location as the VMs being governed. You can choose to exclude VMs which contain a certain tag, from the scope of this policy.
Policy 2 – Configure backup on VMs with a given tag to an existing recovery services vault in the same location
This policy works the same as Policy 1 above, with the only difference being that you can use this policy to include VMs which contain a certain tag, in the scope of this policy.
Policy 3 – Configure backup on VMs without a given tag to a new recovery services vault with a default policy
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If you organize applications in dedicated resource groups and want to have them backed up by the same vault, this policy allows you to automatically manage this action. You can choose to exclude VMs which contain a certain tag, from the scope of this policy.
Policy 4 – Configure backup on VMs with a given tag to a new recovery services vault with a default policy
This policy works the same as Policy 3 above, with the only difference being that you can use this policy to include VMs which contain a certain tag, in the scope of this policy.
In addition to the above, Azure Backup also provides an audit-only policy – Azure Backup should be enabled for Virtual Machines. This policy identifies which virtual machines do not have backup enabled, but doesn’t automatically configure backups for these VMs. This is useful when you are only looking to evaluate the overall compliance of the VMs but not looking to take action immediately.
Supported Scenarios
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The built-in policy is currently supported only for Azure VMs. Users must take care to ensure that the retention policy specified during assignment is a VM retention policy. Refer to this document to see all the VM SKUs supported by this policy.
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Policies 1 and 2 can be assigned to a single location and subscription at a time. To enable backup for VMs across locations and subscriptions, multiple instances of the policy assignment need to be created, one for each combination of location and subscription.
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For Policies 1 and 2, management group scope is currently unsupported.
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For Policies 1 and 2, the specified vault and the VMs configured for backup can be under different resource groups.
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Policies 3 and 4 can be assigned to a single subscription at a time (or a resource group within a subscription).
Using the built-in policies
The below steps describe the end-to-end process of assigning Policy 1: Configure backup on VMs without a given tag to an existing recovery services vault in the same location to a given scope. Similar instructions will apply for the other policies. Once assigned, any new VM created in the scope is automatically configured for backup.
- Sign in to the Azure portal and navigate to the Policy Dashboard.
- Select Definitions in the left menu to get a list of all built-in policies across Azure Resources.
- Filter the list for Category=Backup and select the policy named Configure backup on virtual machines without a given tag to an existing recovery services vault in the same location.
- Select the name of the policy. You’ll be redirected to the detailed definition for this policy.
- Select the Assign button at the top of the pane. This redirects you to the Assign Policy pane.
- Under Basics, select the three dots next to the Scope field. This opens up a right context pane where you can select the subscription for the policy to be applied on. You can also optionally select a resource group, so that the policy is applied only for VMs in a particular resource group.
- In the Parameters tab, choose a location from the drop-down, and select the vault and backup policy to which the VMs in the scope must be associated. You can also choose to specify a tag name and an array of tag values. A VM which contains any of the specified values for the given tag will be excluded from the scope of the policy assignment.
- Ensure that Effect is set to deployIfNotExists.
- Navigate to Review+create and select Create.
Next Steps
Learn more about Azure Policy
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