![]() ![]() By default, Azure Backup takes a full VSS backup (it truncates the logs of application such as SQL Server at the time of backup to get application level consistent backup). Windows VMs: For Windows VMs, the Backup service coordinates with VSS to take an app-consistent snapshot of the VM disks. Snapshot creationĪzure Backup takes snapshots according to the backup schedule. ![]() Only users with the necessary level of permissions can back up and restore encrypted VMs or keys and secrets. So, if the BEKs are lost, authorized users can restore the BEKs to the key vault and recover the encrypted VMs. Neither unauthorized users, or Azure, can read or use backed-up keys or secrets.īEKs are also backed up. They can be read and used only when they're restored back to the key vault by authorized users. The backed-up BEKs (secrets) and KEKs (keys) are encrypted. Encrypted keys and secrets can't be read by unauthorized users or by Azure.įor managed and unmanaged Azure VMs, Backup supports both VMs encrypted with BEKs only or VMs encrypted with BEKs together with KEKs. These users can also recover the encrypted VM. Because KEKs and BEKs are backed up, users with the necessary permissions can restore keys and secrets back to the key vault if needed. Both BEKs and KEKs are backed up and encrypted. Azure Disk Encryption also integrates with Azure Key Vault key encryption keys (KEKs).Īzure Backup supports backup of managed and unmanaged Azure VMs encrypted with BEKs only, or with BEKs together with KEKs. Azure Disk Encryption integrates with BitLocker encryption keys (BEKs), which are safeguarded in a key vault as secrets. ![]() See more here.Īzure Backup uses SSE for at-rest encryption of Azure VMs.Īzure Disk Encryption encrypts both OS and data disks for Azure VMs. With CMK, you manage the keys used to encrypt the disks. SSE with platform-managed keys: This encryption is by default for all disks in your VMs.Azure Backup supports backups of VMs with two types of Storage Service Encryption: Azure Storage also decrypts data before retrieving it. With SSE, Azure Storage provides encryption at rest by automatically encrypting data before storing it. Azure Backup can also back up Azure VMs that are encrypted by using Azure Disk Encryption. When you back up Azure VMs with Azure Backup, VMs are encrypted at rest with Storage Service Encryption (SSE). IaaSVmProvider Windows service is added.Startup type of Volume Shadow Copy service (VSS) changed to automatic from manual.Microsoft Visual C++ 2013 Redistributable(圆4) - 0 is installed in the VM.Changes made to a Windows VM after Azure Backup is enabled on it are:.Total backup time for a VM will be less than 24 hours for daily backup policies. Snapshot data might not be immediately copied to the vault.For each disk that's being backed up, Azure Backup reads the blocks on the disk and identifies and transfers only the data blocks that changed (the delta) since the previous backup.The backup is optimized by backing up each VM disk in parallel.After Backup takes the snapshot, it transfers the data to the vault.For app-consistent snapshots, you need to manually customize pre/post scripts. For Linux VMs, Backup takes a file-consistent backup.If Backup can't take an app-consistent snapshot, then it takes a file-consistent snapshot of the underlying storage (because no application writes occur while the VM is stopped).By default, Backup takes full VSS backups.For Windows VMs that are running, Backup coordinates with Windows Volume Shadow Copy Service (VSS) to take an app-consistent snapshot of the VM.For Linux VMs, the VMSnapshotLinux extension is installed.For Windows VMs, the VMSnapshot extension is installed.During the first backup, a backup extension is installed on the VM if the VM is running.For Azure VMs that are selected for backup, Azure Backup starts a backup job according to the backup schedule you specify.Here's how Azure Backup completes a backup for Azure VMs: The snapshot provides different levels of consistency, as described here.Īzure Backup also has specialized offerings for database workloads like SQL Server and SAP HANA that are workload-aware, offer 15 minute RPO (recovery point objective), and allow backup and restore of individual databases. Configuration and scaling are simple, backups are optimized, and you can easily restore as needed.Īs part of the backup process, a snapshot is taken, and the data is transferred to the Recovery Services vault with no impact on production workloads. Backups are stored in a Recovery Services vault with built-in management of recovery points. ![]() This article describes how the Azure Backup service backs up Azure virtual machines (VMs).Īzure Backup provides independent and isolated backups to guard against unintended destruction of the data on your VMs. ![]()
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