VolSync

Spec sheet

What it does

VolSync is a Kubernetes operator for asynchronous replication of persistent volumes within or across clusters.Read 4 Oct 2026 · volsync.readthedocs.io

Security

Rsync over TLS uses a TLS-protected tunnel and authenticates the connection with a shared TLS-PSK key.Read 4 Oct 2026 · volsync.readthedocs.io

License

The project is licensed under GNU AGPL 3.0, with API files additionally under Apache 2.0 and documentation under CC BY-SA 4.0.Read 4 Oct 2026 · github.com

Backups

The Restic mover supports persistent-volume backups, with ReplicationSource defining backup policy and ReplicationDestination used for restores.Read 4 Oct 2026 · volsync.readthedocs.io

CSI requirements

A Kubernetes snapshot controller is required; CSI storage with snapshot and clone support is recommended for some functionality.Read 4 Oct 2026 · volsync.readthedocs.io

Installation

The documentation recommends deploying VolSync through its Helm chart on Kubernetes or OpenShift.Read 4 Oct 2026 · volsync.readthedocs.io

Monitoring

VolSync exposes metrics for monitoring replication relationships via Prometheus.Read 4 Oct 2026 · volsync.readthedocs.io

Mover permissions

Mover pods run in source and destination namespaces, and their permissions affect what data they can replicate and cluster security.Read 4 Oct 2026 · volsync.readthedocs.io

Organization

The project repository is maintained under the Backube GitHub organization; the opened project pages do not state its headquarters or founding year.Read 4 Oct 2026 · github.com

Rclone use case

Rclone supports asynchronous one-to-many replication through intermediary object storage such as AWS S3.Read 4 Oct 2026 · volsync.readthedocs.io

Replication methods

The documented methods are Rclone, Restic, Rsync over TLS, Rsync over SSH, and Syncthing.Read 4 Oct 2026 · volsync.readthedocs.io

Rsync use case

Rsync over TLS supports one-to-one asynchronous replication for disaster recovery, test-environment mirroring, and remote processing.Read 4 Oct 2026 · volsync.readthedocs.io

Storage independence

Its replication is independent of the storage system and can work across storage types and vendors.Read 4 Oct 2026 · volsync.readthedocs.io

Syncthing use case

Syncthing supports live, many-to-many, eventually consistent synchronization for data spread across peers.Read 4 Oct 2026 · volsync.readthedocs.io

Plans and prices

Every VolSync plan and price →

Where Specifiction places it

• Kubernetes Backup Software#22 of 317.1