Create variable override tests

This way we ensure in the integrated gates that deployers can
override their variables in userspace.

The bigger interest will come when we upgrade to a new version
of ansible, where the variable behavior could be different.
It then proves we are respecting our contract.

Change-Id: I707b3fd6fdc9e7080d7202f2d70e85f441f5db16

scripts/gate-check-commit.sh

@@ -145,6 +145,11 @@ pushd "${OSA_CLONE_DIR}/tests"
   fi
 popd
 
+if [[ "${ACTION}" == "varstest" ]]; then
+  pushd "${OSA_CLONE_DIR}/tests"
+      openstack-ansible test-vars-overrides.yml
+  popd
+else
   pushd "${OSA_CLONE_DIR}/playbooks"
     # Disable Ansible color output
     export ANSIBLE_NOCOLOR=1
@@ -187,6 +192,7 @@ pushd "${OSA_CLONE_DIR}/playbooks"
     log_instance_info
 
   popd
+fi
 
 # If the action is to upgrade, then checkout the original SHA for
 # the checkout, and execute the upgrade.

tests/roles/bootstrap-host/tasks/prepare_aio_config.yml

@@ -184,3 +184,28 @@
   when: pip_conf_file.stat.exists
   tags:
     - container-conf-files
+
+- name: Create vars override folders if we need to test them
+  file:
+    path: "{{ item }}"
+    state: directory
+  with_items:
+    - /etc/openstack_deploy/group_vars
+    - /etc/openstack_deploy/host_vars
+  when: "{{ (lookup('env','ACTION') | default(false,true)) == 'varstest' }}"
+
+- name: Create user-space overrides
+  lineinfile:
+    path: "{{ item.path }}"
+    state: present
+    line:  "{{ item.line }}"
+    create: yes
+  with_items:
+    - path: /etc/openstack_deploy/group_vars/hosts.yml
+      line: 'babar: "elephant"'
+    - path: /etc/openstack_deploy/group_vars/hosts.yml
+      line: 'lxc_hosts_package_state: "present"'
+    - path: /etc/openstack_deploy/host_vars/localhost.yml
+      line: 'security_package_state: "present"'
+    - path: /etc/openstack_deploy/host_vars/localhost.yml
+      line: 'tintin: "milou"'

tests/test-vars-overrides.yml

@@ -0,0 +1,44 @@
+---
+# Copyright 2017, Rackspace US, Inc.
+#
+# 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.
+
+- name: Ensuring group vars
+  hosts: "hosts"
+  gather_facts: no
+  connection: local
+  user: root
+  tasks:
+    - name: Ensuring babar is well defined
+      assert:
+        that:
+          - "babar == 'elephant'"
+    - name: Ensuring lxc_hosts_package_state is well overriden
+      assert:
+        that:
+          - "lxc_hosts_package_state == 'present'"
+
+- name: Ensuring host vars
+  hosts: localhost
+  gather_facts: no
+  connection: local
+  user: root
+  tasks:
+    - name: Ensuring tintin has milou
+      assert:
+        that:
+          - "tintin == 'milou'"
+    - name: Ensuring security_package_state is overriden
+      assert:
+        that:
+          - "security_package_state == 'present'"

zuul.d/jobs.yaml

@@ -35,6 +35,13 @@
       action: deploy
       scenario: aio
 
+# Ensuring overrides work
+- job:
+    name: openstack-ansible-varstest-aio-ubuntu-xenial
+    parent: openstack-ansible-deploy-aio-ubuntu-xenial
+    vars:
+      action: varstest
+
 # ubuntu
 - job:
     name: openstack-ansible-deploy-aio-ubuntu-xenial

zuul.d/project.yaml

@@ -18,6 +18,7 @@
     check:
       jobs:
         - openstack-ansible-linters
+        - openstack-ansible-varstest-aio-ubuntu-xenial
         - openstack-ansible-deploy-aio-centos-7
         - openstack-ansible-deploy-aio-opensuse-423
         - openstack-ansible-deploy-aio-ubuntu-xenial
@@ -30,6 +31,7 @@
     gate:
       jobs:
         - openstack-ansible-linters
+        - openstack-ansible-varstest-aio-ubuntu-xenial
         - openstack-ansible-deploy-aio-ubuntu-xenial
         - openstack-ansible-deploy-ceph-ubuntu-xenial
     periodic: