roles/helm/tasks/main.yml

---
# Copyright 2017-present Open Networking Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# helm/tasks/main.yml
# Installs Helm for kubernetes

# should probably check that downloaded matched installed version, but would
# need checksum of binary inside the tarball, which isn't published
- name: Check to see if Helm is installed
  stat:
    path: "{{ helm_bin_path }}"
  register: helm_bin

- name: Create a tempdir for Helm download
  when: not helm_bin.stat.exists or not helm_bin.stat.executable
  tempfile:
    state: directory
    suffix: helm
  register: helm_tempdir

- name: Download and verify Helm archive
  when: not helm_bin.stat.exists or not helm_bin.stat.executable
  get_url:
    url: "{{ helm_dl_url }}"
    checksum: "{{ helm_dl_checksum }}"
    dest: "{{ helm_tempdir.path }}/helm.tgz"

- name: Unarchive Helm
  when: not helm_bin.stat.exists or not helm_bin.stat.executable
  unarchive:
    remote_src: true
    src: "{{ helm_tempdir.path }}/helm.tgz"
    dest: "{{ helm_tempdir.path }}/"

- name: Move helm binary into place
  when: not helm_bin.stat.exists or not helm_bin.stat.executable
  become: yes
  copy:
    src: "{{ helm_tempdir.path }}/{{ ansible_system | lower }}-{{ cpu_arch }}/helm"
    dest: "{{ helm_bin_path }}"
    owner: root
    group: root
    mode: 0755

# The helm binary is now installed.  Start up tiller on k8s.
# `helm init --wait` should handle these waits below, but is broken
# as of 2018-02-06, see: https://github.com/kubernetes/helm/issues/3379

- name: Initialize Helm and wait for it to be ready
  command: "helm init"
  tags:
    - skip_ansible_lint # while helm may be installed, k8s might have been wiped so tiller needs to be reinstalled

- name: "Wait for 'helm init' to set up Tiller"
  pause:
    seconds: 60

# needed to give permissions and avoid the cryptic
#   "Error: no available release name found" message
# per: https://github.com/kubernetes/helm/issues/3055
- name: Give RBAC permissions to tiller
  command: "kubectl {{ item }}"
  with_items:
    - 'create serviceaccount --namespace kube-system tiller'
    - 'create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller'
    - 'patch deploy --namespace kube-system tiller-deploy -p ''{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}'''
  tags:
    - skip_ansible_lint # have to run these to set up tiller, as k8s might not be up

- name: "Wait for Helm/Tiller to be ready"
  pause:
    seconds: 30