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ZStack ZSphere 5.1.0 Release Notes

Highlights

The highlights of ZStack ZSphere 5.1.0 include:

  • VM Encryption

    ZStack ZSphere 5.1.0 supports encryption at rest and in transit for VMs. Encryption at rest protects data stored in virtual disks, snapshots, and backups. Encryption in transit protects memory and disk data during VM hot migration.

  • Platform Service Management

    ZStack ZSphere 5.1.0 allows you to deploy and manage ZLR and ZCenter services in the UI. ZCenter deployed through Platform Services supports automatic database backup.

  • Third-Party Backup Software Integration

    This release adds Commvault integration for VM backup and restore and further improves Veeam backup and restore capabilities.

New Features

This release includes the following new features.

  • VM Encryption

    ZStack ZSphere 5.1.0 adds encryption at rest and in transit for VMs to protect stored VM data and data transmitted during hot migration.

    Key capabilities include:

    • Encryption at Rest: Encrypts and decrypts data stored in virtual disks, snapshots, and backups at the hypervisor layer. No Guest OS adaptation is required.
    • Key Providers: Supports external KMS providers and the built-in NKP. All storage types except ZHPS support VM and disk encryption.
    • Encryption State Changes and Lifecycle Management: Allows you to enable or disable encryption when a VM is stopped and perform lifecycle operations such as snapshot, backup, and clone on encrypted VMs. Snapshots and backups are automatically encrypted and inherit the source DEK.
    • Encryption in Transit: Encrypts memory and disk data during VM hot migration. TLS encryption is mandatory for encrypted VMs and can be enabled as needed for unencrypted VMs.
  • Platform Service Management

    ZStack ZSphere 5.1.0 adds Platform Service Management, allowing you to deploy ZLR and ZCenter services in the ZStack ZSphere UI. Automatic backup applies only to ZCenter deployed through Platform Services. Each day at 00:00, the system backs up the ZCenter database, synchronizes the backup file to the management node, and retains only the latest backup.

  • Commvault Backup and Restore

    This release supports backup and restore of ZStack ZSphere VMs through Commvault 11.40.51, expanding integration with third-party data protection software.

Improvements

This release includes the following improvements.

  • Log Server Enhancements

    The log server supports multi-level alarms, tiered notifications, and platform operation logs. Logs and alarms of different levels can be delivered to external logging systems for centralized storage, query, and analysis.

  • Block Device Performance Monitoring

    You can view performance metrics for NVMe and FC block devices, including throughput, IOPS, and latency, to understand block device status and troubleshoot performance issues.

  • Built-In QXL Driver in VMTools

    VMTools includes a QXL driver for UEFI VMs. When used with a QXL video device and the SPICE remote desktop protocol, the driver provides 2D graphics acceleration and allows screen resolution adjustment.

  • VM Console Permission Control

    You can separately configure permissions for pasting local commands, using command tools, managing VM power, and enabling read-only mode in the VM console. This enhancement allows console operations to be controlled by role.

  • Data Disk Storage Relocation

    You can migrate only the data disks of a VM. Both cold and hot migration are supported from SAN storage to SAN storage. Cold migration is supported between NFS storage systems or between ZCE distributed storage systems. This enhancement lets you relocate data disks based on capacity, performance, or service planning without migrating the system disk.

  • Network and Hostname Configuration During VM Cloning

    When cloning a VM, you can customize network interface parameters and specify the VM hostname, reducing network and operating system configuration after cloning.

  • Veeam Backup and Restore Performance

    This release optimizes the Veeam backup and restore path to improve backup and restore efficiency.

Resolved Issues

This release resolves the following issues.

VM Management

  • Fixes an issue where periodically collecting network interface status on a Windows VM with VMTools installed might cause PowerShell processes to accumulate and CPU usage to become excessively high.
  • Fixes an issue where VM uptime might be reset after hot migration, host change, host reconnection, or management node restart.

Storage Management

  • Fixes an issue where creating a shared disk from a disk image on SAN storage might fail due to incorrect format conversion handling during disk creation.
  • Fixes an issue where an image storage might not be deleted after it becomes disconnected because the system cannot clean up the remote OVA package.
  • Fixes an issue where the virtual allocatable capacity of a storage pool might not be updated automatically after an unexpected shutdown of a ZStone storage node or reconnection of data storage. This issue might cause resource creation to fail.
  • Fixes an issue where a timer ID overflow after libvirt runs for an extended period might cause libvirt to become abnormal and affect operations such as disk expansion.

Backup and Restore

  • Fixes an issue where metadata such as the operating system type and motherboard type might differ from the source VM after the VM is restored through Veeam or Commvault. Due to compatibility restrictions, a source VM using UEFI + I440FX is converted to Legacy + I440FX during restore.
  • Fixes an issue where Windows file-level restore (FLR) cannot be selected after a Windows VM is backed up in Veeam 12.
  • Fixes an issue where a backup task might fail with Job ID already in use because the system periodically removes the backup task lock file from the temporary directory.
  • Fixes an issue where a CBT backup on thin-provisioned SAN storage might unexpectedly expand a disk and pause the VM.
  • Fixes an issue where a VM might crash during backup.
  • Fixes an issue where a backup task might fail due to a false I/O Hung detection when block job progress remains unchanged for a short period.
  • Fixes an issue where a restore task might fail during high-concurrency Veeam restore because a system call is interrupted when the API Proxy Data Agent writes to an NBD volume.
  • Fixes an issue where connection refused might be displayed during API Proxy installation before the service is ready, potentially causing users to incorrectly assume that the deployment has failed.
  • Fixes an issue where concurrent CBT export or CBT enablement tasks might fail due to NBD port contention.
  • Fixes an issue where NBD export might fail during Veeam backup of a VM with a snapshot chain on SAN storage because the system does not activate the complete disk snapshot chain.

Platform O&M

  • Fixes an issue where KVM Agent memory usage might continue to increase after extended operation, affecting the stability of host task execution.
  • Fixes an issue where custom attribute values might be empty in CSV files exported from VM, host, data storage, bare metal host, distributed switch, or distributed storage resource lists.

Security Updates

This release includes the following security updates.

  • Updates the kernels of Kylin V10 SP3 and Kylin V10 SP3 2403 to fix CVE-2026-46333 and CVE-2026-43494.
  • Updates the H84r kernel to fix Linux KVM vulnerabilities CVE-2026-53359 and CVE-2026-46113.
  • Updates the Linux kernels and related drivers of supported operating systems to fix CVE-2026-31431 and CVE-2026-43284.
  • Upgrades Redis to 7.2.11 to fix CVE-2025-49844.
  • Updates the Kylin V10 SP3 2403 kernel to fix CVE-2026-46331.
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