kubespray/roles/etcd/tasks/pre_upgrade.yml

- name: "Pre-upgrade | check for etcd-proxy unit file"
  stat:
    path: /etc/systemd/system/etcd-proxy.service
  register: kube_apiserver_service_file
  tags: facts

- name: "Pre-upgrade | check for etcd-proxy init script"
  stat:
    path: /etc/init.d/etcd-proxy
  register: kube_apiserver_init_script
  tags: facts

- name: "Pre-upgrade | stop etcd-proxy if service defined"
  service:
    name: etcd-proxy
    state: stopped
  when: (kube_apiserver_service_file.stat.exists|default(False) or kube_apiserver_init_script.stat.exists|default(False))

- name: "Pre-upgrade | remove etcd-proxy service definition"
  file:
    path: "{{ item }}"
    state: absent
  when: (kube_apiserver_service_file.stat.exists|default(False) or kube_apiserver_init_script.stat.exists|default(False))
  with_items:
    - /etc/systemd/system/etcd-proxy.service
    - /etc/init.d/etcd-proxy

- name: "Pre-upgrade | find etcd-proxy container"
  command: docker ps -aq --filter "name=etcd-proxy*"
  register: etcd_proxy_container
  ignore_errors: true

- name: "Pre-upgrade | remove etcd-proxy if it exists"
  command: "docker rm -f {{item}}"
  with_items: "{{etcd_proxy_container.stdout_lines}}"