Hi Matthieu,
Currently, NS8 itself does not send email notifications for backup failures.
However, monitoring, alarms, and email notifications are available through Nethesis cloud services for clusters with an active subscription.
If you’d like to implement a custom notification script, you can use the APIs to list failed backups. For example:
api-cli run list-backups | jq -r '.backups[]|.instances[]|select(.status.success==false)|.module_id'
The APIs are especially useful if you want to test from a remote host or gather detailed information.
For a simple success/fail check on the NS8 leader node, you can inspect the contents of this file:
cat /run/backup-monitor.dat
An F in the output indicates that one or more backups have failed.
Feel free to reach out if you have any questions or need further help!