kubespray/roles/etcd/handlers/backup_cleanup.yml

---
- name: Cleanup etcd backups
  command: /bin/true
  notify:
    - Remove old etcd backups

- name: Remove old etcd backups
  shell:
    chdir: "{{ etcd_backup_prefix }}"
    cmd: "set -o pipefail && find . -name 'etcd-*' -type d | sort -n | head -n -{{ etcd_backup_retention_count }} | xargs rm -rf"
    executable: /bin/bash
  when: etcd_backup_retention_count >= 0