kubespray/roles/etcd/tasks/install_rkt.yml

---
- name: Trust etcd container
  command: >-
    /usr/bin/rkt trust
    --skip-fingerprint-review
    --root
    https://quay.io/aci-signing-key
  register: etcd_rkt_trust_result
  until: etcd_rkt_trust_result.rc == 0
  retries: 4
  delay: "{{ retry_stagger | random + 3 }}"
  changed_when: false
  environment: "{{proxy_env}}"

- name: Install | Copy etcdctl binary from rkt container
  command: >-
    /usr/bin/rkt run
    --volume=bin-dir,kind=host,source={{ bin_dir}},readOnly=false
    --mount=volume=bin-dir,target=/host/bin
    {{ etcd_image_repo }}:{{ etcd_image_tag }}
    --name=etcdctl-binarycopy
    --exec=/bin/cp -- /usr/local/bin/etcdctl /host/bin/etcdctl
  register: etcd_task_result
  until: etcd_task_result.rc == 0
  retries: 4
  delay: "{{ retry_stagger | random + 3 }}"
  changed_when: false
  environment: "{{proxy_env}}"