How to Back Up Nextcloud Docker Volumes Using Open-Source Tool Portabase

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Self-hosted Nextcloud instances store critical data — including files, calendars, and databases — in persistent Docker volumes that must be independently backed up. Portabase is an open-source backup platform that centrally manages backups across multiple servers using a server-agent architecture. In this tutorial, a Nextcloud instance is deployed via Docker and connected to Portabase, which handles scheduled backups and restores of its Docker volumes. The Portabase agent runs on the same Docker host as Nextcloud, communicating with a central Portabase server that manages storage destinations and retention policies. This setup ensures Nextcloud data can be reliably recovered after failures, accidental deletions, or migrations.

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