Use uWSGI for trove-api

This migrate trove-api to usage of the uwsgi from native service to
align with other service way of deployment and since that's how service
is tested in devstack.

Change-Id: I83ad3af282942ff9714757e863f393894ac35f45

defaults/main.yml

@@ -67,6 +67,10 @@ trove_profiler_enabled: false
 trove_api_workers_max: 16
 trove_api_workers: "{{ [[(ansible_facts['processor_vcpus']//ansible_facts['processor_threads_per_core'])|default(1), 1] | max * 2, trove_api_workers_max] | min }}"
 
+# uWSGI settings
+trove_wsgi_threads: 1
+trove_use_uwsgi: True
+
 ## Cap the maximum number of threads / workers when a user value is unspecified.
 trove_conductor_workers_max: 16
 trove_conductor_workers: "{{ [[(ansible_facts['processor_vcpus']//ansible_facts['processor_threads_per_core'])|default(1), 1] | max * 2, trove_conductor_workers_max] | min }}"
@@ -235,8 +239,8 @@ trove_conductor_config_overrides: {}
 trove_taskmanager_config_overrides: {}
 trove_guestagent_config_overrides: {}
 trove_policy_overrides: {}
-
 trove_api_init_config_overrides: {}
+trove_api_uwsgi_ini_overrides: {}
 trove_conductor_init_config_overrides: {}
 trove_taskmanager_init_config_overrides: {}
 
@@ -247,6 +251,11 @@ trove_services:
     service_name: trove-api
     execstarts: "{{ trove_bin }}/trove-api"
     init_config_overrides: "{{ trove_api_init_config_overrides }}"
+    wsgi_app: "{{ trove_use_uwsgi }}"
+    wsgi_name: trove-api-wsgi
+    uwsgi_overrides: "{{ trove_api_uwsgi_ini_overrides }}"
+    uwsgi_bind_address: "{{ trove_service_host }}"
+    uwsgi_port: "{{ trove_service_port }}"
     start_order: 1
   trove-conductor:
     group: trove_conductor
@@ -260,6 +269,3 @@ trove_services:
     execstarts: "{{ trove_bin }}/trove-taskmanager"
     init_config_overrides: "{{ trove_taskmanager_init_config_overrides }}"
     start_order: 3
-
-_trove_is_first_play_host: "{{ (trove_services['trove-api']['group'] in group_names and inventory_hostname == (groups[trove_services['trove-api']['group']] | intersect(ansible_play_hosts)) | first) | bool }}"
-_trove_conductor_is_first_play_host: "{{ (trove_services['trove-conductor']['group'] in group_names and inventory_hostname == (groups[trove_services['trove-conductor']['group']] | intersect(ansible_play_hosts)) | first) | bool }}"

tasks/main.yml

@@ -109,7 +109,7 @@
     - trove-config
 
 - name: Run the systemd service role
-  import_role:
+  include_role:
     name: systemd_service
   vars:
     systemd_user_name: "{{ trove_system_user_name }}"
@@ -121,28 +121,31 @@
     systemd_BlockIOAccounting: true
     systemd_MemoryAccounting: true
     systemd_TasksAccounting: true
-    systemd_services: |-
-      {% set services = [] %}
-      {% for key, value in trove_services.items() %}
-      {%   if (value['group'] in group_names) %}
-      {%     set _ = value.update(
-              {
-                'service_key': key,
-                'enabled': 'yes',
-                'state': 'started',
-                'config_overrides': value.init_config_overrides
-              }
-            )
-      %}
-      {%     set _ = value.pop('init_config_overrides') -%}
-      {%     set _ = services.append(value) %}
-      {%   endif %}
-      {% endfor %}
-      {{ services }}
+    systemd_services:
+      - service_name: "{{ service_var.service_name }}"
+        enabled: yes
+        state: started
+        execstarts: "{{ service_var.execstarts }}"
+        execreloads: "{{ service_var.execreloads | default([]) }}"
+        config_overrides: "{{ service_var.init_config_overrides }}"
+  with_items: "{{ filtered_trove_services }}"
+  loop_control:
+    loop_var: service_var
   tags:
     - trove-config
     - systemd-service
 
+- name: Import uwsgi role
+  import_role:
+    name: uwsgi
+  vars:
+    uwsgi_services: "{{ uwsgi_trove_services }}"
+    uwsgi_install_method: "source"
+  tags:
+    - trove-install
+    - trove-config
+    - uwsgi
+
 - import_tasks: service_setup.yml
   vars:
     _project_name: "{{ trove_service_project_name }}"

tasks/trove_post_install.yml

@@ -35,6 +35,7 @@
       config_type: "ini"
   notify:
     - Restart trove API services
+    - Restart uwsgi services
   when: inventory_hostname in groups['trove_api']
 
 - name: Implement policy.yaml if there are overrides configured
@@ -59,6 +60,20 @@
   tags:
     - trove-policy-override
 
+- name: Drop trove wsgi binary
+  template:
+    src: wsgi.py.j2
+    dest: "{{ trove_bin }}/trove-api-wsgi"
+    owner: "{{ trove_system_user_name }}"
+    group: "{{ trove_system_group_name }}"
+    mode: "0755"
+  when:
+    - trove_use_uwsgi | bool
+    - inventory_hostname in groups['trove_api']
+  notify:
+    - Restart trove API services
+    - Restart uwsgi services
+
 - name: Drop trove-conductor Config(s)
   config_template:
     src: "{{ item.src }}"

templates/wsgi.py.j2

@@ -0,0 +1,40 @@
+# Copyright 2021 City Network International AB
+#
+# 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.
+"""
+Used for deploying Trove API through mod-wsgi
+"""
+
+from oslo_log import log as logging
+from trove.cmd.common import with_initialize
+from trove.common import pastedeploy
+from trove.common import profile
+
+LOG = logging.getLogger('trove.cmd.app')
+
+
+@with_initialize
+def wsgimain(CONF):
+    from trove.common import cfg
+    from trove.common import notification
+    from trove.instance import models as inst_models
+
+    notification.DBaaSAPINotification.register_notify_callback(
+        inst_models.persist_instance_fault)
+    cfg.set_api_config_defaults()
+    profile.setup_profiler('api', CONF.host)
+    conf_file = CONF.find_file(CONF.api_paste_config)
+    LOG.debug("Trove started on %s", CONF.host)
+    return pastedeploy.paste_deploy_app(conf_file, 'trove', {})
+
+application = wsgimain()

tests/ansible-role-requirements.yml

@@ -55,3 +55,7 @@
   src: https://opendev.org/openstack/ansible-role-python_venv_build
   scm: git
   version: master
+- name: uwsgi
+  src: https://opendev.org/openstack/ansible-role-uwsgi
+  scm: git
+  version: master

vars/main.yml

@@ -0,0 +1,51 @@
+---
+# Copyright 2021 City Network International AB
+#
+# 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.
+
+_trove_is_first_play_host: "{{ (trove_services['trove-api']['group'] in group_names and inventory_hostname == (groups[trove_services['trove-api']['group']] | intersect(ansible_play_hosts)) | first) | bool }}"
+_trove_conductor_is_first_play_host: "{{ (trove_services['trove-conductor']['group'] in group_names and inventory_hostname == (groups[trove_services['trove-conductor']['group']] | intersect(ansible_play_hosts)) | first) | bool }}"
+
+filtered_trove_services: |-
+  {% set services = [] %}
+  {% for key, value in trove_services.items() %}
+  {%   if (value['group'] in group_names) and
+          (('condition' not in value) or
+           ('condition' in value and value['condition'])) and
+            not ('wsgi_app' in value and value['wsgi_app']) %}
+  {%     set _ = value.update({'service_key': key}) %}
+  {%     set _ = services.append(value) %}
+  {%   endif %}
+  {% endfor %}
+  {{ services | sort(attribute='start_order') }}
+
+uwsgi_trove_services: |-
+  {% set services = {} %}
+  {% for key, value in trove_services.items() %}
+  {%   if (value['group'] in group_names) and
+         (('condition' not in value) or ('condition' in value and value['condition']))
+         and ('wsgi_app' in value and value['wsgi_app']) %}
+  {%     set _ = value.update(
+           {
+             'wsgi_path':  trove_bin ~ '/' ~ value.wsgi_name,
+             'wsgi_venv': trove_bin | dirname,
+             'uwsgi_uid': trove_system_user_name,
+             'uwsgi_guid': trove_system_group_name,
+             'uwsgi_processes': trove_api_workers,
+             'uwsgi_threads': trove_wsgi_threads,
+           }
+         ) %}
+  {%     set _ = services.update({key: value}) %}
+  {%   endif %}
+  {% endfor %}
+  {{ services }}