Proxmox, known for developing the Proxmox Virtual Environment and Proxmox Mail Gateway products, has published the release of the Proxmox Backup Server 4.2 distribution, which is presented as a ready-made solution for backup and recovery of virtual environments, containers and server stuffing. The installation ISO image is available for free download. Distribution-specific components are licensed under the AGPLv3 license. To install updates, both a paid Enterprise repository and two free repositories are available, which differ in the level of update stabilization.
The system part of the distribution is based on the package base Debian and OpenZFS. The backup management software stack is written in Rust and supports incremental backups (only changed data is transferred to the server), deduplication (if there are duplicates, only one copy is stored), compression (using ZSTD), and backup encryption. The system is designed based on a client-server architectureβProxmox Backup Server can be used both for local backups and as a centralized backup server. Server for backing up data from different hosts. Fast, granular recovery and data synchronization modes are provided between servers.
Proxmox Backup Server supports integration with the Proxmox VE platform for backups. virtual machines and containers. Backup management and data recovery are carried out via a web interface. It is possible to restrict user access to their data. All traffic transmitted from clients to server The backups are encrypted using AES-256 in GCM mode, and the backups themselves are transferred encrypted using asymmetric public-key encryption (encryption is performed on the client side, so compromising the server hosting the backups will not result in data leakage). The integrity of the backups is verified using SHA-256 hashes.
In the new release:
- Synchronization with the distribution package database has been completed. Debian 13.4. Updated kernel Linux 7.0 and OpenZFS 2.4.
- Added the ability to move namespaces and backup groups to other locations within the same storage to make it easier to reorganize data placement without risking data loss.
- Added support for encryption and decryption of synchronized backups, allowing you to transfer snapshots to untrusted third-party external storage in encrypted form.
- Added the ability to process backup groups in multiple threads to improve synchronization performance.
- Official support has been implemented for using object storage that supports the S3 protocol as a backend for storing backups, with the ability to collect statistics on traffic and the number of requests for monitoring and tracking compliance with traffic limits.
Source: opennet.ru
