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Central is the 3to1go app that receives and keeps backups. It runs on one always-on host, such as a home server, NAS, or VPS, and every Edge uploads to it.

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What Central does

  • Receives uploads from Edges in chunks, and verifies each one before storing it.
  • Stores snapshots as encrypted archive files under edge_id/edge_instance_id/job_name in its backup folder.
  • Applies retention, keeping the most recent snapshots per job and instance.
  • Mints and revokes Edge credentials, so only Edges you’ve authorized can upload.
  • Checks integrity on a schedule, if enabled.
  • Lets you browse, download, and delete snapshots in its web UI, decrypting downloads in your browser.
  • Sends notifications to ntfy and runs your own scripts when uploads arrive.
Central never needs your plaintext files. It only handles archives that Edge has already encrypted.

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What it runs

The example Compose file runs both. See Install Central.

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Folders it uses

Back up Central’s config folder. issuer.key signs Edge credentials; if it’s lost, every existing credential stops working and each Edge needs a new one.

Install Central

Configuration