placement: Add support for using uWSGI

Needed to set log_file because logs ended up with following name:
<frozen importlib._bootstrap>.log

Change-Id: I706adef8efbd44e6d9f82f67f5a3cdb529f02fff

ansible/roles/placement/defaults/main.yml

@@ -8,6 +8,7 @@ placement_services:
     volumes: "{{ placement_api_default_volumes + placement_api_extra_volumes }}"
     dimensions: "{{ placement_api_dimensions }}"
     healthcheck: "{{ placement_api_healthcheck }}"
+    wsgi: "placement.wsgi.api:application"
     haproxy:
       placement_api:
         enabled: "{{ enable_placement }}"
@@ -148,3 +149,8 @@ placement_ks_users:
 placement_enable_tls_backend: "{{ kolla_enable_tls_backend }}"
 
 placement_copy_certs: "{{ kolla_copy_ca_into_containers | bool or placement_enable_tls_backend | bool }}"
+
+####################
+# WSGI
+####################
+placement_wsgi_provider: "uwsgi"

ansible/roles/placement/tasks/config.yml

@@ -63,11 +63,32 @@
     src: "{{ item }}"
     dest: "{{ node_config_directory }}/placement-api/placement-api-wsgi.conf"
     mode: "0660"
-  when: service | service_enabled_and_mapped_to_host
+  when:
+    - service | service_enabled_and_mapped_to_host
+    - placement_wsgi_provider == "apache"
   with_first_found:
     - "{{ node_custom_config }}/placement/{{ inventory_hostname }}/placement-api-wsgi.conf"
     - "{{ node_custom_config }}/placement/placement-api-wsgi.conf"
     - "placement-api-wsgi.conf.j2"
+  notify:
+    - "Restart placement-api container"
+
+- name: "Configure uWSGI for Placement"
+  include_role:
+    name: service-uwsgi-config
+  vars:
+    project_services: "{{ placement_services }}"
+    service: "{{ placement_services['placement-api'] }}"
+    service_name: "placement-api"
+    service_uwsgi_config_http_port: "{{ placement_api_listen_port }}"
+    service_uwsgi_config_module: "{{ service.wsgi }}"
+    service_uwsgi_config_tls_backend: "{{ placement_enable_tls_backend | bool }}"
+    service_uwsgi_config_tls_cert: "/etc/placement/certs/placement-cert.pem"
+    service_uwsgi_config_tls_key: "/etc/placement/certs/placement-key.pem"
+    service_uwsgi_config_uid: "placement"
+  when:
+    - service | service_enabled_and_mapped_to_host
+    - placement_wsgi_provider == "uwsgi"
 
 - name: Copying over migrate-db.rc.j2 configuration
   become: true

ansible/roles/placement/templates/placement-api.json.j2

@@ -1,7 +1,8 @@
 {% set apache_binary = 'apache2' if kolla_base_distro in ['ubuntu', 'debian'] else 'httpd' %}
 {% set apache_conf_dir = 'apache2/conf-enabled' if kolla_base_distro in ['ubuntu', 'debian'] else 'httpd/conf.d' %}
+{% set command = '/usr/sbin/{{ apache_binary }} -DFOREGROUND' if placement_wsgi_provider == 'apache' else 'uwsgi /etc/placement/placement-api-uwsgi.ini' %}
 {
-    "command": "/usr/sbin/{{ apache_binary }} -DFOREGROUND",
+    "command": "{{ command }}",
     "config_files": [
         {
             "source": "{{ container_config_directory }}/placement.conf",
@@ -14,13 +15,19 @@
             "dest": "/etc/placement/{{ placement_policy_file }}",
             "owner": "placement",
             "perm": "0600"
-        }{% endif %},
+        }{% endif %}{% if placement_wsgi_provider == 'apache' %},
         {
             "source": "{{ container_config_directory }}/placement-api-wsgi.conf",
             "dest": "/etc/{{ apache_conf_dir }}/00-placement-api.conf",
             "owner": "placement",
             "perm": "0600"
-        },
+        }{% elif placement_wsgi_provider == 'uwsgi' %},
+        {
+            "source": "{{ container_config_directory }}/placement-api-uwsgi.ini",
+            "dest": "/etc/placement/placement-api-uwsgi.ini",
+            "owner": "placement",
+            "perm": "0600"
+        }{% endif %},
         {
             "source": "{{ container_config_directory }}/migrate-db.rc",
             "dest": "/etc/placement/migrate-db.rc",

ansible/roles/placement/templates/placement.conf.j2

@@ -1,7 +1,7 @@
 [DEFAULT]
 debug = {{ placement_logging_debug }}
 
-log_dir = /var/log/kolla/placement
+log_file = /var/log/kolla/placement/{{ service_name }}.log
 
 state_path = /var/lib/placement
 

releasenotes/notes/uwsgi-aef85ccbc76dab3e.yaml

@@ -11,3 +11,5 @@ features:
         - Variable
       * - Nova
         - nova_wsgi_provider
+      * - Placement
+        - placement_wsgi_provider