apiVersion: k8up.io/v1
kind: Backup
metadata:
  name: ...
spec:
  backend:
    s3: (1)
      endpoint: https://s3-bucket
      bucket: backups
      accessKeyIDSecretRef: ...
      secretAccessKeySecretRef: ...

apiVersion: k8up.io/v1
kind: Schedule
metadata:
  name: ...
spec:
  backend:
    s3:
    # ...
  backup:
    schedule: '*/5 * * * *' (1)

# ...
  metadata:
    labels:
      app: postgresql
    annotations:
      k8up.io/backupcommand: sh -c 'pg_dump --clean' (1)
      k8up.io/file-extension: .sql
  spec:
    containers:
      - name: postgres
        image: docker.io/bitnami/postgresql:11
        ...
# ...