Prometheus Borg Exporter

A very simple Borg exporter for Prometheus. This exporter is mostly useful for getting the days since the last backup was made and the sizes of the backups in total.

Dependencies

• python
• prometheus_client

Usage

Run the exporter

python prometheus-borg-exporter.py

The default port is 9099, visit metrics [http://localhost:9099/ http://localhost:9099/].

Configuration

The backup directory's can be configured in borg.yml with the backups directories in the 'dirs' list. The metrics use the basename of the directory as the "backup host".

Example Promethues AlertManager rule

  - name: backup
  interval: 60s
  rules:
  - alert: backup
    expr: borg_last_modified > 5
    for: 20m
    labels:
      severity: warning
    annotations:
      description: 'host {{ $labels.instance }} has outdated backups'
      summary: '{{ $labels.instance }} backups are {{ $value }} days old'

Not implemented

There is no support for decrypting the backups.