Use openstackclient from container

We have multiple places, such as bridge, where we use openstackclient
as a utility. The current practice tends to be installing it into a
venv somewhere. On bridge there are 16 venvs in /root - and in some
of them but not all exist a working openstack client.

Since it's purely an API interaction tool, all it needs is the
clouds.yaml files bind-mounted in. The openstackclient project
now publishes a container image. Install a wrapper script for
calling it into /usr/local on bridge.

Change-Id: I4c64125d5dd3c89275e259a57b0efa0847ac6fc2

playbooks/roles/install-osc-container/README.rst

@@ -0,0 +1 @@
+An ansible role to install openstackclient container and helper script

playbooks/roles/install-osc-container/files/openstack

@@ -0,0 +1,20 @@
+#!/bin/bash
+# Copyright (c) 2020 Red Hat, 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.
+
+exec docker run -it --rm \
+  -v/etc/openstack:/etc/openstack \
+  docker.io/osclient/python-openstackclient \
+  openstack $@

playbooks/roles/install-osc-container/tasks/main.yaml

@@ -0,0 +1,8 @@
+- name: Add helper script
+  become: yes
+  copy:
+    dest: /usr/local/bin/openstack
+    group: root
+    mode: 0755
+    owner: root
+    src: openstack

playbooks/service-bridge.yaml

@@ -4,6 +4,8 @@
     - ansible-cron
     - cloud-launcher-cron
     - edit-secrets-script
+    - install-docker
+    - install-osc-container
     - install-kubectl
     - configure-kubectl
   tasks: