Backup systems for remote machines and databases with a web interface?

Question

PostgreSQL

Good afternoon!
There are several virtual machines on CentOS and a database on PostgreSQL.
On one of the machines, I would like to set up a system with a web interface that would be able to:
1. Take dumps from a remote PostgreSQL database on a schedule
2. Copy configs and other files located on remote machines on a schedule
At the same time, the goal is to copy the entire machine totally not worth it.
3. Notify about backup (successful or not) by e-mail.
4. Was free
There are already ideas how to implement this using bash scripts, rsync, barman, etc., but suddenly there is a combine that can do everything?

Answer 1

For review:
https://events.yandex.ru/lib/talks/3202/
https://github.com/dev1ant/misc/tree/master/backup...

Answer 2

habrahabr.ru/post/211755