docs/content/admin/backing-up-and-restoring-your-instance/backup-service-for-github-enterprise-server/restoring-from-a-backup.md

title, shortTitle, intro, versions, type, topics

title	shortTitle	intro	versions	type	topics
Restoring from a backup	Restore from backup	Restore a {% data variables.product.prodname_ghe_server %} instance using a previously created backup snapshot.	ghes >= 3.17	how_to	Backups

You can restore a {% data variables.product.prodname_ghe_server %} instance from a backup using the command line. The backup service supports full instance restoration, including configuration and user data.

[!WARNING] Restoring from a backup will overwrite all existing data on your instance. This operation cannot be undone.

Snapshot version requirements

You can only restore a snapshot if it's from at most two feature versions behind the version of the target instance.

For example:

• A snapshot from version 3.17 can be restored to a target running 3.17.x, 3.18.x, or 3.19.x.
• You cannot restore a 3.17 snapshot to 3.20 — that’s more than two versions ahead.

You also can’t restore from a newer version to an older one. For example, trying to restore a 3.18 snapshot to a 3.17 instance will fail with: Error: Snapshot can not be restored to an older release of GitHub Enterprise Server.

Prerequisites

Before restoring a backup:

1. Enable maintenance mode on the target instance. See AUTOTITLE.
2. Verify access to the backup storage containing the snapshot.
3. Pause interfering services — if using High Availability (HA), make sure replication is stopped.
4. Prepare for {% data variables.product.prodname_actions %} — if enabled, ensure the target instance is configured with the correct external storage. See AUTOTITLE for details.

Starting the restore operation

To restore from a snapshot:

1. SSH into the target instance as the admin user.

2. Run one of the following commands:

   • Restore the latest snapshot:

     ghe-restore
     

   • Restore a specific snapshot. Replace <SNAPSHOT_TIMESTAMP> with the timestamp of the snapshot you want to restore (e.g., YYYYMMDDTHHMMSS).

     ghe-restore -s <SNAPSHOT_TIMESTAMP>
     

   • (Optional) Force overwrite of configuration, certificates, and license data:

     ghe-restore -c          # Latest snapshot
     ghe-restore -s <SNAPSHOT_TIMESTAMP> -c  # Specific snapshot
     

3. Finalize in {% data variables.enterprise.management_console %}:

   • Review all configuration settings (network, auth, TLS, etc.).
   • Click Save settings to apply them and start services.
   • The instance is not fully operational until this step is complete.

4. Validate the restored instance to ensure everything works as expected.

5. If using HA, complete the restore on a standalone instance first. Then reconfigure HA.

   • If you run into sync issues (e.g., stale UUIDs in ghe-repl-status), run ghe-repl-teardown.
   • For help, contact {% data variables.contact.github_support %}.

6. Re-register self-hosted {% data variables.product.prodname_actions %} runners, as restore invalidates previous tokens.

Snapshot rotation and retention

Snapshots are automatically pruned based on your retention settings:

• Only the most recent n snapshots are kept (as configured).
• Older snapshots are deleted after each successful backup.
• Snapshots are named using timestamps (YYYYMMDDTHHMMSS) for easy reference.
• Hard links are used to store unchanged files efficiently while preserving full restore capability.

Troubleshooting restoration failures

If a restore operation fails, check:

• Backup completeness – Make sure the snapshot wasn't interrupted or corrupted.
• Storage access – Verify the instance can mount and read the backup volume.
• Version mismatch – Confirm the snapshot version is compatible with the target instance.
• Logs – Review /var/log/github-backup/restore-verbose-[timestamp].log for errors.

If the {% data variables.enterprise.management_console %} shows a generic failure, SSH into the instance to access detailed logs.