New role to create/update/delete hiera value during upgrade.

We need to override the cluster definition during upgrade, so that we
can build a one node cluster followed by a two and three nodes
cluster.

Change-Id: Id55a4ea7f0e8a8d95a49ba93853cf7844d938f43
Implements: blueprint upgrades-with-os

roles/tripleo-upgrade-hiera/README.md

@@ -0,0 +1,39 @@
+tripleo-upgrade-hiera
+=====================
+
+An Ansible role to set hiera value during upgrade as json value/key.
+
+Role variables
+--------------
+
+Required:
+
+* `tripleo_upgrade_key` -- the hiera key to setup. (optional for remove_all)
+* `tripleo_upgrade_value` -- the hiera value to setup. (non-needed for remove and remove_all)
+
+Optional:
+
+* `tripleo_upgrade_hiera_file` -- hiera file to were the variable go.
+  (defaults to "/etc/puppet/hieradata/upgrade.json")
+
+Test playbook
+-------------
+
+Assuming you have tripleo-inventory.yml generated, you can run the
+test playbook like:
+
+    ANSIBLE_ROLES_PATH=tripleo-common/roles \
+    ANSIBLE_HOST_KEY_CHECKING=False \
+    ansible-playbook
+        -i tripleo-inventory.yml \
+        tripleo-common/roles/tripleo-upgrade-hiera/test-playbook.yml
+
+License
+-------
+
+Free software: Apache License (2.0)
+
+Author Information
+------------------
+
+OpenStack TripleO team

roles/tripleo-upgrade-hiera/defaults/main.yml

@@ -0,0 +1 @@
+tripleo_upgrade_hiera_file: /etc/puppet/hieradata/upgrade.json

roles/tripleo-upgrade-hiera/tasks/create-tripleo-upgrade-file.yml

@@ -0,0 +1,35 @@
+- name: create the directory for hiera file
+  file:
+    path: "{{tripleo_upgrade_hiera_file|dirname}}"
+    owner: "root"
+    group: "root"
+    mode: 0755
+    state: directory
+  become: yes
+
+- name: check if the upgrade file exists.
+  stat:
+    path: "{{tripleo_upgrade_hiera_file}}"
+  register: _tripleo_upgrade_hiera_file
+  become: yes
+
+- name: check if the file contains valid json
+  command: "jq . {{tripleo_upgrade_hiera_file}}"
+  register: _tripleo_upgrade_hiera_test
+  become: yes
+  when: _tripleo_upgrade_hiera_file.stat.exists
+
+- name: create the hiera file when no file or empty file.
+  copy:
+    dest: "{{tripleo_upgrade_hiera_file}}"
+    owner: "root"
+    group: "root"
+    mode: 0644
+    content: "{}"
+  become: yes
+  when: not _tripleo_upgrade_hiera_file.stat.exists or _tripleo_upgrade_hiera_test.stdout == ""
+
+- name: load the json hiera data
+  command: "jq . {{tripleo_upgrade_hiera_file}}"
+  register: tripleo_upgrade_hiera_command
+  become: yes

roles/tripleo-upgrade-hiera/tasks/remove-all.yml

@@ -0,0 +1,6 @@
+---
+- name: delete the upgrade hiera file
+  file:
+    path: "{{tripleo_upgrade_hiera_file}}"
+    state: absent
+  become: yes

roles/tripleo-upgrade-hiera/tasks/remove.yml

@@ -0,0 +1,16 @@
+---
+- name: ensure tripleo-upgrade hiera file exists
+  include_tasks: create-tripleo-upgrade-file.yml
+
+- name: remove a tripleo-upgrade key
+  set_fact:
+    tripleo_upgrade_hiera_data_del: "{{ tripleo_upgrade_hiera_data_del|default({})|combine({item.key: item.value}) }}"
+    cacheable: no
+  when: item.key != tripleo_upgrade_key
+  with_dict: "{{ tripleo_upgrade_hiera_command.stdout | from_json | default({}) }}"
+
+- name: write the updated tripleo-upgrade hiera data
+  copy:
+    content: "{{ tripleo_upgrade_hiera_data_del | to_nice_json }}"
+    dest: "{{tripleo_upgrade_hiera_file}}"
+  become: yes

roles/tripleo-upgrade-hiera/tasks/set.yml

@@ -0,0 +1,15 @@
+---
+- name: ensure tripleo-upgrade hiera file exists
+  include_tasks: create-tripleo-upgrade-file.yml
+
+- name: set/update the tripleo-upgrade key/value
+  set_fact:
+    tripleo_upgrade_hiera_data_add: "{{ tripleo_upgrade_hiera_command.stdout | from_json | combine({ tripleo_upgrade_key: tripleo_upgrade_value }) }}"
+    cacheable: no
+
+- name: write the updated tripleo-upgrade hiera data
+  copy:
+    content: "{{ tripleo_upgrade_hiera_data_add | to_nice_json }}"
+    dest: "{{tripleo_upgrade_hiera_file}}"
+  become: yes
+

roles/tripleo-upgrade-hiera/test-playbook.yml

@@ -0,0 +1,39 @@
+- hosts: controller-0
+  gather_facts: false
+  become: true
+  tasks:
+    - name: test tripleo-upgrade-hiera - add a first value
+      include_role:
+        name: tripleo-upgrade-hiera
+        tasks_from: set.yml
+      vars:
+        tripleo_upgrade_key: pacemaker_short_node_names_override
+        tripleo_upgrade_value: [ "controller-0" ]
+
+    - name: test tripleo-upgrade-hiera - add another value
+      include_role:
+        name: tripleo-upgrade-hiera
+        tasks_from: set.yml
+      vars:
+        tripleo_upgrade_key: mysql_short_node_names_override
+        tripleo_upgrade_value: [ "controller-0", "controller-1" ]
+
+    - name: test tripleo-upgrade-hiera - update a value
+      include_role:
+        name: tripleo-upgrade-hiera
+        tasks_from: set.yml
+      vars:
+        tripleo_upgrade_key: mysql_short_node_names_override
+        tripleo_upgrade_value: [ "controller-1" ]
+
+    - name: test tripleo-upgrade-hiera - remove a value
+      include_role:
+        name: tripleo-upgrade-hiera
+        tasks_from: remove.yml
+      vars:
+        tripleo_upgrade_key: pacemaker_short_node_names_override
+
+    - name: test tripleo-upgrade-hiera - remove all values
+      include_role:
+        name: tripleo-upgrade-hiera
+        tasks_from: remove-all.yml