Add a tasks to download amphora image for octavia deployments

This patch adds a task to download the Octavia Amphora image to the
working directory on the undercloud so that it can be pulled in by the
Octavia overcloud deployment tasks.

Change-Id: Ie387f1274059ec80d19c5ef0bf9aed7a3a999e2a

playbooks/baremetal-full-undercloud.yml

@@ -26,6 +26,15 @@
   tags:
     - validate-undercloud
 
+- name: Download amphora image for octavia
+  hosts: undercloud
+  gather_facts: false
+  tags:
+    - octavia
+  roles:
+    - {role: octavia-amphora-download,
+       when: download_amphora is defined and download_amphora|bool}
+
 - name: Build images for quickstart
   hosts: undercloud
   gather_facts: false

playbooks/multinode-standalone.yml

@@ -26,6 +26,15 @@
   tags:
     - build
 
+- name: Download amphora image for octavia
+  hosts: undercloud
+  gather_facts: false
+  roles:
+    - {role: octavia-amphora-download,
+       when: download_amphora is defined and download_amphora|bool}
+  tags:
+    - octavia
+
 # NOTE(aschultz): nested virt causes problems in CI so we default to qemu
 # and do not do the dynamic virt lookup.
 - name: Deploy Standalone

playbooks/multinode-undercloud.yml

@@ -85,6 +85,15 @@
   roles:
     - validate-undercloud
 
+- name: Download amphora image for octavia
+  hosts: undercloud
+  gather_facts: false
+  tags:
+    - octavia
+  roles:
+    - {role: octavia-amphora-download,
+       when: download_amphora is defined and download_amphora|bool}
+
 - name: Set Libvirt type
   hosts: overcloud
   roles:

playbooks/quickstart-extras-undercloud.yml

@@ -38,3 +38,12 @@
   roles:
     - {role: tripleo-validations,
        when: run_tripleo_validations|bool or run_tripleo_validations_negative_tests|bool}
+
+- name: Download amphora image for octavia
+  hosts: undercloud
+  gather_facts: false
+  tags:
+    - octavia
+  roles:
+    - {role: octavia-amphora-download,
+       when: download_amphora is defined and download_amphora|bool}

roles/octavia-amphora-download/README.md

@@ -0,0 +1,43 @@
+Octavia-amphora-download
+========================
+
+An Ansible role to download Octavia amphora images to be used in CI or scripted deployments.
+
+Requirements
+------------
+
+This playbook expects a supported version of Ansible and working Internet access.
+
+Role Variables:
+---------------
+
+- target\_dir <'$HOME'> -- location to store the downloaded image
+- amphora\_url -- url of image to download. If not provided a default location based on branch is used.
+
+Dependenncies
+-------------
+
+No dependencies
+
+Example Playbook
+----------------
+
+Download the amphora image for the stein branch to foo's home directory:
+
+  - hosts: undercloud
+    vars:
+      release: "stein"
+      target_dir: "/home/foo"
+    roles:
+      - octavia-amphora-dowload
+
+
+License
+-------
+
+Apache 2.0
+
+Author Information
+------------------
+
+RDO-CI Team

roles/octavia-amphora-download/defaults/main.yml

@@ -0,0 +1,2 @@
+---
+target_dir: "{{ working_dir }}"

roles/octavia-amphora-download/tasks/main.yml

@@ -0,0 +1,17 @@
+---
+- name: Set the download url if amphora_url provided
+  set_fact:
+    download_url: "{{ amphora_url }}"
+  when:
+    amphora_url is defined and ((amphora_url | length) > 0)
+
+- name: Set the download url to specified release branch if amphora_url not provided
+  set_fact:
+    download_url: "https://images.rdoproject.org/octavia/{{ release }}/amphora-x64-haproxy-centos.qcow2"
+  when:
+    download_url is not defined
+
+- name: Download the amphora
+  get_url:
+    url: "{{ download_url }}"
+    dest: "{{ target_dir }}/amphora.qcow2"