RSYNC between OMV and Storagebox Hetzner

Hi,

Below, are the steps to take, when you want to setup an RSYNC backup job between a local folder, and a Storagebox from Hetzner.

Prerequisites

• Create an SSH key on OMV over CLI
• Copy the SSH keys (public/private over CLI)

Create the keys

SSH into your OMV

ssh root@<your-omv-ip>

Generate the SSH key

ssh-keygen -t rsa -b 4096 -m PEM -f /root/.ssh/hetzner_storagebox_rsa -N ""

Then, upload the key to Hetzner's Storage box user/sub-user

cat /root/.ssh/hetzner_storagebox.pub | ssh -p 23 [username]@u[username].your-storagebox.de install-ssh-key

Accept the host key (This is critical for OMV)

Enter your storage box password, when prompted

You will receive the following response

Key No. 1 (ssh-rsa root@omv-storage) was installed in RFC4716 format
Key No. 1 (ssh-rsa root@omv-storage) was installed in OpenSSH format

Test connection

ssh -p 23 -i /root/.ssh/hetzner_storagebox_rsa [username]@u[username].your-storagebox.de ls

Next step, is to import the keys into OMV

Go to System > Certificates > SSH

Click + and then click import, however, before you do this, please following the steps below, over CLI

Display both keys, and paste them inside the right locations in the GUI, start with the private key

cat /root/.ssh/hetzner_storagebox_rsa 

This will display the following

-----BEGIN RSA PRIVATE KEY-----
[your private key here]
-----END RSA PRIVATE KEY-----

Copy the full part, from the start to finish, and paste this inside the text field, for the private key

Then, display the public key, and do the same

cat /root/.ssh/hetzner_storagebox_rsa.pub

This displays

ssh-rsa [public key here] root@omv-storage

Copy the full part, from start to finish, and paste this inside the text field, for the public key

Add a tag, because you need this shortly, and click on Import

Create your RSYNC job

Go to Services > RSYNC > Tasks

Click on Create

• Type: Remote
• Mode: Push
• Source: Your folder
• Destination server: USERNAME@USERNAME.your-storagebox.de:
  
  NOTE: Important, you need to add the : at the end, otherwise it won't work
• Authentication: Public Key
• SSH Port: 23
• SSH Certificate: The certificate we created, with the tag you added.
• Set the time/date you want to run it, and add a tag

Click Apply

Then, do a test run, you will see output:

Please wait, syncing </srv/[diskname]/[foldername]/> to <[username]@[username].your-storagebox.de> ... 
[file summary here]

sent 68,508 bytes received 392 bytes 45,933.33 bytes/sec total size is 67,185 speedup is 0.98 The synchronisation has completed successfully.  END OF LINE

Congratulations, you can now sync to your remote storage box