Successful backup e-mail notification

[DavidePrincipi]

In NS7, an email notification was sent for both failed and successful backups. NS8 only checks for failures and triggers an alarm. The missing success notification is important for some organizations to comply with quality standards (e.g., ISO 9000).

Proposed solution

• Configure a list of recipient email addresses for each scheduled backup
• When the scheduled backup run completes, send a backup report to the configured recipients
• The report contains the list of successful and failed application backups, along with backup size information
• Add destination storage space information, if available

Alternative solutions

• No UI in the first iteration. Configure the recipient list only via the Redis database

Additional context

Section "Scheduled backups" of the "Backup and restore" page

See also

• Sync-up recap: https://mattermost.nethesis.it/nethesis/pl/nxxgp3onejba7ysu5f1pqu7nue
• https://partner.nethesis.it/t/ricevere-via-e-mail-esiti-processi-backup-ns8/9926?u=davidep

[Neustradamus]

I confirm that it is needed.

[DavidePrincipi]

While the feature goal is a backup report, this is a related Python script to receive a simple email notification every time a backup succeeds, if someone asks for it: https://gist.github.com/DavidePrincipi/3e9d763c87da0441b1dae705ca4222be

• It works with the new backup implementation Centralized Backup Orchestration and Rclone-based Gateway #7814.
• Failure notifications can be enabled too.

/cc @nrauso