Problem

It is currently not possible to run pgbackrest in combination with s3 storage endpoints without enabling a cloud provider and letting autobase do the machine provisioning.

Description

Add a dedicated "backup" role alongside a new option backup_provider which is called by the playbook tasks pgbackrest and executes/configures the respective backup provider in combination with either pgbackrest or wal_g.

I already have a working prototype of this an use and can create a PR, if wanted.

Importance

nice to have

Proposed implementation

No response