How to migrate preexisting borg backups when switching to remote borg backup?

[michaelfliegner]

As of now I can only configure a new instance for backup to BorgBase.
Switching from preexisting local backups I would have to borg transfer my local backups to BorgBase. Thereafter I could remote restore from the new instance. But restoring the instance from a preexisting archive implies returning to local backups, right?

How to handle that?
Shouldn't the solution be extended to include

• import of preexisting archives and
• change of backup location?

Then restoring from a preexisting archive would entail only

• upgrading to AIO >= v10
• toggle back to remote backup.

[szaimen]

@timdiels do you have some ideas how to do the above?

[michaelfliegner]

I did not test to restore the remote backup.

My question was just that: what happens after restoring from remote?

And it has been answered by @timdiels .

[timdiels]

Ah one other thing, we need a way to set the encryption password when resetting in this case. I think now it just generates a new password which doesn't match the existing repo's password.

[timdiels]

Although we already know the password, if it just keeps using the existing one after we reset, we should be fine

[KoMa1012]

6. In AIO interface, click on `Reset backup location` and enter the remote URL.

I can't find Reset backup location in my nextcloud aio interface, I stopped the containers (except master obviously) but it's still not there. Is there anything special I have to do? I'm on 10.0.0 (main channel).

[asavageiv]

FYI I was able to get this to work by moving step 4 to after Step 6. Reset backup location only appears if borg.config is not present.

The updated steps are:

1. Stop all containers (from AIO interface).
2. Move borg.config (in nextcloud-aio-mastercontainer volume) to a temporary location.
3. Move all files from existing borg repo location to a new location managed by remote borg server. (I did it manually by moving the files and correcting ownership of all files - because my borg backup server runs on the same machine.)
4. Re-create AIO master container (in my case: docker compose down; docker compose up -d)
5. In AIO interface, click on Reset backup location and enter the remote URL.
6. Restore borg.config from temporary location back to nextcloud-aio-mastercontainer volume).
7. In AIO interface, click on Create backup - it fails due to authentication error. Copy the displayed SSH pub key to the borg backup server's authorized_keys.
8. In AIO interface, click on Create backup again. It should work now.

I also didn't need to do Step 3 because my previous location was an sshfs mount. These steps allowed me to create a backup at the new location without moving the repository, which would have been slow because it is quite large.