Setting up borgmatic fails with error

luto276

I followed the instructions at https://docs.mailcow.email/third_party/borgmatic/third_party-borgmatic/ and added the neccessary ssh keys to the borgmatic storage at Hetzner.

When I try to initialize the repository I get the following error:

me@mail:/opt/mailcow-dockerized$ sudo docker compose exec borgmatic-mailcow borgmatic init --encryption repokey-blake2
Remote: exec request failed on channel 0
Connection closed by remote host. Is borg working on the server?
rsync: Error running actions for repository
rsync: Command '('borg', 'info', '--json', 'ssh://u459758@u459758.your-storagebox.de:22/./mailcow')' returned non-zero exit status 81.
/etc/borgmatic.d/config.yaml: Error running configuration
/etc/borgmatic.d/config.yaml: An error occurred

summary:
An error occurred
Error running actions for repository
Command '('borg', 'info', '--json', 'ssh://uxxxxxxx@uxxxxxxx.your-storagebox.de:22/./mailcow')' returned non-zero exit status 81.
Error running configuration

Need some help? https://torsion.org/borgmatic/#issues

What am I missing?

accolon

I don’t use Hetzner’s storage box, but the error message Is borg working on the server? looks like there is no BorgBackup binary on the remote server. Do you have to install BorgBackup first?

EDIT:
I found this:
“The Storage Box provides an extended SSH service on port 23. With this service, you can use rsync, BorgBackup, and some additional command line tools.”

It seems like you can’t use port 22.

luto276

Accodring to this description borgmatic is enabled at the storage box. But you are right that I used the wrong port.

Ganzjahresgriller

And does that work now? I also use Borgmatic with Hetzner and it works wonderfully

luto276

Couldn’t try yet. Was busy all the day but just tried it and now it works like a charm. Changing the port from 22 to 23 was an easy fix. Thanks for your help!

Now I have another question: how can I change the port when I want to fetch the repo-key?

The documentation uses

docker compose exec borgmatic-mailcow borg key export --paper user@rsync.net:mailcow

I cahnged “user” and “sync.net” to the necessary settings but I have no idea how to change the port in this command line.

Ganzjahresgriller

When using any of the repokey encryption methods the encryption key will be stored in the repository itself and not on the client, so there is no further action required in this regard. Source: https://docs.mailcow.email/third_party/borgmatic/third_party-borgmatic/#initialize-the-repository