marcpope/borgbackupserver v2.27.0-beta1

v2.27.0-beta1 (prerelease)

on GitHub

Beta — Docker bind mount permissions overhaul

This is a prerelease for testing on Synology NAS and other btrfs-backed bind mount setups. The :latest tag is not updated; pull explicitly with marcpope/borgbackupserver:v2.27.0-beta1.

What's new

Building on #143 (big thanks to @addvanced):

• Automatic UID/GID migration. Change PUID/PGID in .env and restart — the container chowns existing files for you. No manual commands. State is tracked in /var/bbs/config/.ownership and migrations are only re-run when the configured values actually change.
• MariaDB and ClickHouse UID remapping. New optional env vars MYSQL_PUID / MYSQL_PGID / CH_PUID / CH_PGID extend the PUID pattern to all three services, for users who want every file on the data volume owned by their host user.
• Preflight guards. Container refuses to start (with a clear error) if PUID is 0, collides with another service's UID, or collides with an existing SSH client UID. No silent corruption.
• Detailed timestamped logging. Every migration step announces itself, with file counts before and elapsed time after so you can see what the container is doing on slow restarts.
• ensure_dir helper + Dockerfile cleanups from the original PR (~70MB image size reduction, btrfs write-bit fix).

Testing

Pull the tagged image:

```bash
docker pull marcpope/borgbackupserver:v2.27.0-beta1
```

Or in compose:

```yaml
image: marcpope/borgbackupserver:v2.27.0-beta1
```

Known notes

• Existing installs upgrading with default PUID=33 see zero change — migration only runs when PUID/PGID actually differ.
• First migration on large repositories (millions of files) can take several minutes. Logs report per-path progress.
• Bind-mounted volumes only. Named Docker volumes are unaffected.

Please report any issues you hit on #121 or as new issues.