kubespray/roles/kubernetes-apps/helm/tasks/install_host.yml

---
- name: Helm | Compare host helm with hyperkube container
  command: "{{ docker_bin_dir }}/docker run --rm -v {{ bin_dir }}:/systembindir --entrypoint /usr/bin/cmp {{ helm_image_repo }}:{{ helm_image_tag }} /usr/local/bin/helm /systembindir/helm"
  register: helm_task_compare_result
  until: helm_task_compare_result.rc in [0,1,2]
  retries: 4
  delay: "{{ retry_stagger | random + 3 }}"
  changed_when: false
  failed_when: "helm_task_compare_result.rc not in [0,1,2]"

- name: Helm | Copy helm from helm container
  command: "{{ docker_bin_dir }}/docker run --rm -v {{ bin_dir }}:/systembindir --entrypoint /bin/cp {{ helm_image_repo }}:{{ helm_image_tag }} -f /usr/local/bin/helm /systembindir/helm"
  when: helm_task_compare_result.rc != 0
  register: helm_task_result
  until: helm_task_result.rc == 0
  retries: 4
  delay: "{{ retry_stagger | random + 3 }}"

- name: Helm | Copy socat wrapper for Container Linux
  command: "{{ docker_bin_dir }}/docker run --rm -v {{ bin_dir }}:/opt/bin {{ install_socat_image_repo }}:{{ install_socat_image_tag }}"
  args:
    creates: "{{ bin_dir }}/socat"
  when: ansible_os_family in ['CoreOS', 'Container Linux by CoreOS']