Nolan Brubaker 7b288eafbe Use in-tree env.d files, provide override support
In past versions, upgrading OpenStack-Ansible lead to contention between
the code base and deployer customizations when env.d files were changed.
Deployers were encouraged to make their customizations, while the
project needed to sometimes adjust architecture. Detecting these
conflicts in an automated way was difficult, since the files were simple
dictionaries and lists, leaving no metadata to describe intent for the
changes.

This change modifies the dynamic inventory system to first use the
in-tree env.d directory as the base environment, then reads in files
from the /etc/openstack_deploy/env.d directory and updates existing keys
with the new values. In this way, the OSA project can modify the
environment and deployers can customize the environment without directly
manipulating the same files.

As part of this change, the env.d directory was moved in to the
playbooks/inventory directory, in order to reduce the path manipulation
done inside of the dynamic_inventory.py script. The example files were
left in the etc/openstack_deploy directory for reference.

Note that this change supports deleting elements by specifying a
empty value, such as an empty list or an empty dictionary.

When overriding, only the path to the values that changed is necessary.
For example, changing the 'is_metal' property for cinder only needs the
following in /etc/openstack_deploy/env.d/cinder.yml:

    container_skel:
      cinder_volumes_container:
        properties:
          is_metal: false

This is instead of the entirity of the container_skel dict or even the
other top-level dicts.

For AIO/gate scenarioes, the env.d copy logic has been removed, as it is
now redundant.

Change-Id: Ic637fa385fd3fec7365fb9bc5e0ff54a7f4c8bee
2016-07-01 16:40:28 +00:00

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---
# Copyright 2014, 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.
component_skel:
nova_api_metadata:
belongs_to:
- nova_all
nova_api_os_compute:
belongs_to:
- nova_all
nova_cert:
belongs_to:
- nova_all
nova_compute:
belongs_to:
- nova_all
nova_conductor:
belongs_to:
- nova_all
nova_scheduler:
belongs_to:
- nova_all
nova_console:
belongs_to:
- nova_all
container_skel:
nova_api_metadata_container:
belongs_to:
- infra_containers
- os-infra_containers
contains:
- nova_api_metadata
properties:
service_name: nova
nova_api_os_compute_container:
belongs_to:
- infra_containers
- os-infra_containers
contains:
- nova_api_os_compute
properties:
service_name: nova
nova_cert_container:
belongs_to:
- infra_containers
- os-infra_containers
contains:
- nova_cert
properties:
service_name: nova
nova_compute_container:
belongs_to:
- compute_containers
contains:
- neutron_linuxbridge_agent
- neutron_openvswitch_agent
- nova_compute
properties:
is_metal: true
service_name: nova
nova_conductor_container:
belongs_to:
- infra_containers
- os-infra_containers
contains:
- nova_conductor
properties:
service_name: nova
nova_scheduler_container:
belongs_to:
- infra_containers
- os-infra_containers
contains:
- nova_scheduler
properties:
service_name: nova
nova_console_container:
belongs_to:
- infra_containers
- os-infra_containers
contains:
- nova_console
properties:
service_name: nova
physical_skel:
compute_containers:
belongs_to:
- all_containers
compute_hosts:
belongs_to:
- hosts