Add a playbook to register nova flavors for baremetal nodes

Currently fairly simplistic - registers a flavor for each unique combination of
scheduling properties.

ansible/compute-node-flavors.yml

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+---
+# This playbook queries the bare metal compute node inventory in ironic and
+# creates flavors in nova for each unique combination of scheduling properties
+# (ram, disk, cpus). More complex flavor registration must currently be
+# performed manually.
+
+- name: Determine a list of baremetal flavors to register in nova
+  hosts: controllers[0]
+  vars:
+    venv: "{{ ansible_env.PWD }}/shade-venv"
+    flavor_base_name: baremetal-
+  roles:
+    - role: openstackclient
+      openstackclient_venv: "{{ venv }}"
+
+  tasks:
+    - name: Get a list of ironic nodes
+      shell: >
+        source {{ venv }}/bin/activate &&
+        openstack baremetal node list --fields name extra properties -f json
+      register: ironic_node_list
+      changed_when: False
+      environment: "{{ openstack_auth_env }}"
+
+    - name: Set facts containing the ironic nodes and initialise lists
+      set_fact:
+        ironic_nodes: "{{ ironic_node_list.stdout | from_json }}"
+        ironic_node_flavor_properties: []
+        nova_flavors: []
+
+    - name: Set a fact containing the ironic node properties
+      set_fact:
+        # Extra_specs required for CPU archiecture but not currently supported
+        # by ansible. Will be added in 2.3.
+        # At that point, add "'cpu_arch': item.Properties.cpu_arch,".
+        ironic_node_flavor_properties: >
+          {{ ironic_node_flavor_properties  +
+             [{'vcpus': item.Properties.cpus,
+               'ram': item.Properties.memory_mb,
+               'disk': item.Properties.local_gb}] }}
+      with_items: "{{ ironic_nodes }}"
+
+    - name: Set a fact containing a list of flavors to register in nova
+      set_fact:
+        nova_flavors: >
+          {{ nova_flavors +
+             [item.1 | combine({'name': flavor_base_name ~ item.0})] }}
+      with_indexed_items: "{{ ironic_node_flavor_properties | unique | sort }}"
+
+- name: Ensure baremetal compute node flavors are registered
+  hosts: controllers[0]
+  vars:
+    venv: "{{ ansible_env.PWD }}/shade-venv"
+  roles:
+    - role: nova-flavors
+      nova_flavors_venv: "{{ venv }}"
+      nova_flavors_auth_type: "{{ openstack_auth_type }}"
+      nova_flavors_auth: "{{ openstack_auth }}"

ansible/roles/nova-flavors/README.md

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+Nova Flavors
+============
+
+This role can be used to register flavors in nova using the
+os\_nova\_flavor module.
+
+Requirements
+------------
+
+The OpenStack nova API should be accessible from the target host.
+
+Role Variables
+--------------
+
+`nova_flavors_venv` is a path to a directory in which to create a
+virtualenv.
+
+`nova_flavors_auth_type` is an authentication type compatible with
+the `auth_type` argument of `os_*` Ansible modules.
+
+`nova_flavors_auth` is a dict containing authentication information
+compatible with the `auth` argument of `os_*` Ansible modules.
+
+`nova_flavors` is a list of nova flavors to register. Each item should be a
+dict containing the items 'name', 'ram', 'disk', and 'vcpus'. Optionally, the
+dict may contain 'ephemeral' and 'swap' items.
+
+Dependencies
+------------
+
+This role depends on the Kayobe `shade` role.
+
+Example Playbook
+----------------
+
+The following playbook registers a nova flavor.
+
+    ---
+    - name: Ensure nova flavors are registered
+      hosts: nova-api
+      roles:
+        - role: nova-flavors
+          nova_flavors_venv: "~/nova-flavors-venv"
+          nova_flavors_auth_type: "password"
+          nova_flavors_auth:
+            project_name: <keystone project>
+            username: <keystone user>
+            password: <keystone password>
+            auth_url: <keystone auth URL>
+          nova_flavors:
+            name: flavor-1
+            ram: 1024
+            disk: 1024
+            vcpus: 2
+
+Author Information
+------------------
+
+- Mark Goddard (<mark@stackhpc.com>)

ansible/roles/nova-flavors/defaults/main.yml

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+---
+# Path to a directory in which to create a virtualenv.
+nova_flavors_venv:
+
+# Authentication type.
+nova_flavors_auth_type:
+
+# Authentication information.
+nova_flavors_auth: {}
+
+# List of nova flavors to register. Each item should be a dict containing the
+# items 'name', 'ram', 'disk', and 'vcpus'. Optionally, the dict may contain
+# 'ephemeral' and 'swap' items.
+nova_flavors: []

ansible/roles/nova-flavors/meta/main.yml

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+---
+dependencies:
+  - role: shade
+    shade_venv: "{{ nova_flavors_venv }}"

ansible/roles/nova-flavors/tasks/main.yml

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+---
+- name: Set a fact to ensure Ansible uses the python interpreter in the virtualenv
+  set_fact:
+    ansible_python_interpreter: "{{ nova_flavors_venv }}/bin/python"
+
+- name: Ensure nova flavors exist
+  os_nova_flavor:
+    auth_type: "{{ nova_flavors_auth_type }}"
+    auth: "{{ nova_flavors_auth }}"
+    name: "{{ item.name }}"
+    ram: "{{ item.ram }}"
+    vcpus: "{{ item.vcpus }}"
+    disk: "{{ item.disk }}"
+    ephemeral: "{{ item.ephemeral | default(omit) }}"
+    swap: "{{ item.swap | default(omit) }}"
+    state: present
+  with_items: "{{ nova_flavors }}"
+
+# This variable is unset before we set it, and it does not appear to be
+# possible to unset a variable in Ansible.
+- name: Set a fact to reset the Ansible python interpreter
+  set_fact:
+    ansible_python_interpreter: /usr/bin/python