Add container image list role

Adding tripleo-container-image-list which can be used to query the
containers in a given registry.

Change-Id: I08e70fa7802028c1fdfb2b0ce09ea247a0e4847a

roles/tripleo-container-image-list/README.md

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+tripleo-container-image-list
+============================
+
+A role to perform the container image list against a registry.
+
+Requirements
+------------
+
+None.
+
+Role Variables
+--------------
+
+* `tripleo_container_image_list_debug`: (Boolean) Flag to print out the list command. Default: False
+* `tripleo_container_image_list_format`: (String) The format that the output will be in. By default we specify 'json' so that the output will be parsed in ansible. Default: json
+* `tripleo_container_image_list_password`: (String) Password for the registry
+* `tripleo_container_image_list_registry`: (String) Registry to run the list against
+* `tripleo_container_image_list_username`: (String) Username for the registry
+
+Output Variables
+----------------
+
+* `tripleo_container_image_list_output`: (List|String) If tripleo_container_image_list_format is json, the results will automatically be parsed and a list is returned. If another format is used then this will be the response in String format.
+* `tripleo_container_image_list_result`: Ansible shell execution results
+
+Dependencies
+------------
+
+None.
+
+Example Playbook
+----------------
+
+Example container list execution playbook
+
+    - hosts: undercloud
+      gather_facts: true
+      tasks:
+        - name: List containers
+          import_role:
+            name: tripleo-container-image-list
+        - name: Print containers
+          debug:
+            msg: "{{ item['Image Name'] }}"
+          loop: "{{ tripleo_container_image_list_output }}"
+
+License
+-------
+
+Apache-2.0

roles/tripleo-container-image-list/defaults/main.yml

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+---
+# defaults file for tripleo-container-image-list
+tripleo_container_image_list_debug: false
+tripleo_container_image_list_format: json
+tripleo_container_image_list_password:
+tripleo_container_image_list_registry:
+tripleo_container_image_list_username:

roles/tripleo-container-image-list/meta/main.yml

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+---
+# Copyright 2019 Red Hat, Inc.
+# All Rights Reserved.
+#
+# 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.
+
+
+galaxy_info:
+  author: OpenStack
+  description: TripleO Operator Role -- tripleo-container-image-list
+  company: Red Hat
+  license: Apache-2.0
+  min_ansible_version: 2.8
+  #
+  # Provide a list of supported platforms, and for each platform a list of versions.
+  # If you don't wish to enumerate all versions for a particular platform, use 'all'.
+  # To view available platforms and versions (or releases), visit:
+  # https://galaxy.ansible.com/api/v1/platforms/
+  #
+  platforms:
+    - name: CentOS
+      versions:
+        - 7
+        - 8
+
+  galaxy_tags:
+    - tripleo
+
+
+# List your role dependencies here, one per line. Be sure to remove the '[]' above,
+# if you add dependencies to this list.
+dependencies: []

roles/tripleo-container-image-list/tasks/main.yml

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+---
+# tasks file for tripleo-container-image-list
+- name: Setup container image list facts
+  set_fact:
+    _list_cmd: >-
+      openstack tripleo container image list
+      {{ tripleo_container_image_list_username | ternary('--username ' ~ tripleo_container_image_list_username, '') }}
+      {{ tripleo_container_image_list_password | ternary('--password ' ~ tripleo_container_image_list_password, '') }}
+      {{ tripleo_container_image_list_registry | ternary('--registry ' ~ tripleo_container_image_list_registry, '') }}
+      {{ tripleo_container_image_list_format | ternary('-f ' ~ tripleo_container_image_list_format, '') }}
+
+- name: Show the container image list command
+  debug:
+    var: _list_cmd
+  when: tripleo_container_image_list_debug|bool
+
+- name: Container image list
+  shell: "{{ _list_cmd }}"  # noqa 305
+  register: tripleo_container_image_list_result
+  changed_when: false
+
+- name: Set output fact
+  set_fact:
+    tripleo_container_image_list_output: "{{ tripleo_container_image_list_result.stdout }}"

roles/tripleo-container-image-list/tests/inventory

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+localhost
+

roles/tripleo-container-image-list/tests/test.yml

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+---
+- hosts: localhost
+  remote_user: root
+  roles:
+    - tripleo-container-image-list