1. Update to 2.2 as described in this guide.
2. Follow steps for 2.2
If update to 2.2 is not possible:
1. Log in to any node's with Acronis Backup Gateway role terminal
2. Execute following commands:
# cd /mnt/vstorage/vols/acronis-backup/certs/
# vstorage-abgw-register register -s `cat .abgw.account-server` -a <storage_dns_name> -u <admin_account> -d . -c
Please make sure command has a dot at the end.
<storage_dns_name> is storage's name in Acronis Backup Cloud
<admin_account> is partner administrator user login
After executing second command system will prompt you for partner administrator's password - please enter it.
If # cd /mnt/vstorage/vols/acronis-backup/certs/ gives an error you are logged in to node without required role
3. Execute following command on all nodes with Acronis Backup Gateway role:
# service vstorage-abgw restart