move reload functionality to its own file

awx/main/tasks.py

@@ -10,7 +10,6 @@ import json
 import logging
 import os
 import signal
-import subprocess
 import pipes
 import re
 import shutil
@@ -34,7 +33,6 @@ import pexpect
 # Celery
 from celery import Task, task
 from celery.signals import celeryd_init, worker_process_init
-from celery import current_app
 
 # Django
 from django.conf import settings
@@ -55,6 +53,7 @@ from awx.main.task_engine import TaskEnhancer
 from awx.main.utils import (get_ansible_version, get_ssh_version, decrypt_field, update_scm_url,
                             check_proot_installed, build_proot_temp_dir, wrap_args_with_proot,
                             get_system_task_capacity, OutputEventFilter, parse_yaml_or_json)
+from awx.main.utils.reload import restart_local_services
 from awx.main.utils.handlers import configure_external_logger
 from awx.main.consumers import emit_channel_notification
 
@@ -94,59 +93,6 @@ def task_set_logger_pre_run(*args, **kwargs):
     configure_external_logger(settings, async_flag=False, is_startup=False)
 
 
-def _uwsgi_reload():
-    # http://uwsgi-docs.readthedocs.io/en/latest/MasterFIFO.html#available-commands
-    logger.warn('Initiating uWSGI chain reload of server')
-    TRIGGER_CHAIN_RELOAD = 'c'
-    with open(settings.uWSGI_FIFO_LOCATION, 'w') as awxfifo:
-        awxfifo.write(TRIGGER_CHAIN_RELOAD)
-
-
-def _reset_celery_thread_pool():
-    # Send signal to restart thread pool
-    app = current_app._get_current_object()
-    app.control.broadcast('pool_restart', arguments={'reload': True},
-                          destination=['celery@{}'.format(settings.CLUSTER_HOST_ID)], reply=False)
-
-
-def _supervisor_service_restart(service_internal_names):
-    '''
-    Service internal name options:
-     - beat - celery - callback - channels - uwsgi - daphne
-     - fact - nginx
-    example use pattern of supervisorctl:
-    # supervisorctl restart tower-processes:receiver tower-processes:factcacher
-    '''
-    group_name = 'tower-processes'
-    args = ['supervisorctl']
-    if settings.DEBUG:
-        args.extend(['-c', '/supervisor.conf'])
-    programs = []
-    name_translation_dict = settings.SERVICE_NAME_DICT
-    for n in service_internal_names:
-        if n in name_translation_dict:
-            programs.append('{}:{}'.format(group_name, name_translation_dict[n]))
-    args.extend(['restart'])
-    args.extend(programs)
-    logger.debug('Issuing command to restart services, args={}'.format(args))
-    subprocess.Popen(args)
-
-
-def restart_local_services(service_internal_names):
-    logger.warn('Restarting services {} on this node in response to user action'.format(service_internal_names))
-    if 'uwsgi' in service_internal_names:
-        _uwsgi_reload()
-        service_internal_names.pop('uwsgi')
-    restart_celery = False
-    if 'celery' in service_internal_names:
-        restart_celery = True
-        service_internal_names.pop('celery')
-    _supervisor_service_restart(service_internal_names)
-    if restart_celery:
-        # Celery restarted last because this probably includes current process
-        _reset_celery_thread_pool()
-
-
 def _clear_cache_keys(set_of_keys):
     logger.debug('cache delete_many(%r)', set_of_keys)
     cache.delete_many(set_of_keys)

awx/main/tests/unit/utils/test_reload.py

@@ -1,13 +1,37 @@
-# from django.conf import LazySettings
-import pytest
-
 # awx.main.utils.reload
-from awx.main.main.tasks import _supervisor_service_restart, subprocess
+from awx.main.utils import reload
 
 
 def test_produce_supervisor_command(mocker):
-    with mocker.patch.object(subprocess, 'Popen'):
-        _supervisor_service_restart(['beat', 'callback', 'fact'])
-        subprocess.Popen.assert_called_once_with(
+    with mocker.patch.object(reload.subprocess, 'Popen'):
+        reload._supervisor_service_restart(['beat', 'callback', 'fact'])
+        reload.subprocess.Popen.assert_called_once_with(
             ['supervisorctl', 'restart', 'tower-processes:receiver', 'tower-processes:factcacher'])
 
+
+def test_routing_of_service_restarts_works(mocker):
+    '''
+    This tests that the parent restart method will call the appropriate
+    service restart methods, depending on which services are given in args
+    '''
+    with mocker.patch.object(reload, '_uwsgi_reload'):
+        with mocker.patch.object(reload, '_reset_celery_thread_pool'):
+            with mocker.patch.object(reload, '_supervisor_service_restart'):
+                reload.restart_local_services(['uwsgi', 'celery', 'flower', 'daphne'])
+                reload._uwsgi_reload.assert_called_once_with()
+                reload._reset_celery_thread_pool.assert_called_once_with()
+                reload._supervisor_service_restart.assert_called_once_with(['flower', 'daphne'])
+
+
+def test_routing_of_service_restarts_diables(mocker):
+    '''
+    Test that methods are not called if not in the args
+    '''
+    with mocker.patch.object(reload, '_uwsgi_reload'):
+        with mocker.patch.object(reload, '_reset_celery_thread_pool'):
+            with mocker.patch.object(reload, '_supervisor_service_restart'):
+                reload.restart_local_services(['flower'])
+                reload._uwsgi_reload.assert_not_called()
+                reload._reset_celery_thread_pool.assert_not_called()
+                reload._supervisor_service_restart.assert_called_once_with(['flower'])
+

awx/main/utils/reload.py

@@ -0,0 +1,68 @@
+# Copyright (c) 2017 Ansible Tower by Red Hat
+# All Rights Reserved.
+
+# Python
+import subprocess
+import logging
+
+# Django
+from django.conf import settings
+
+# Celery
+from celery import current_app
+
+logger = logging.getLogger('awx.main.utils.reload')
+
+
+def _uwsgi_reload():
+    # http://uwsgi-docs.readthedocs.io/en/latest/MasterFIFO.html#available-commands
+    logger.warn('Initiating uWSGI chain reload of server')
+    TRIGGER_CHAIN_RELOAD = 'c'
+    with open(settings.UWSGI_FIFO_LOCATION, 'w') as awxfifo:
+        awxfifo.write(TRIGGER_CHAIN_RELOAD)
+
+
+def _reset_celery_thread_pool():
+    # Send signal to restart thread pool
+    app = current_app._get_current_object()
+    app.control.broadcast('pool_restart', arguments={'reload': True},
+                          destination=['celery@{}'.format(settings.CLUSTER_HOST_ID)], reply=False)
+
+
+def _supervisor_service_restart(service_internal_names):
+    '''
+    Service internal name options:
+     - beat - celery - callback - channels - uwsgi - daphne
+     - fact - nginx
+    example use pattern of supervisorctl:
+    # supervisorctl restart tower-processes:receiver tower-processes:factcacher
+    '''
+    group_name = 'tower-processes'
+    args = ['supervisorctl']
+    if settings.DEBUG:
+        args.extend(['-c', '/supervisor.conf'])
+    programs = []
+    name_translation_dict = settings.SERVICE_NAME_DICT
+    for n in service_internal_names:
+        if n in name_translation_dict:
+            programs.append('{}:{}'.format(group_name, name_translation_dict[n]))
+    args.extend(['restart'])
+    args.extend(programs)
+    logger.debug('Issuing command to restart services, args={}'.format(args))
+    subprocess.Popen(args)
+
+
+def restart_local_services(service_internal_names):
+    logger.warn('Restarting services {} on this node in response to user action'.format(service_internal_names))
+    if 'uwsgi' in service_internal_names:
+        _uwsgi_reload()
+        service_internal_names.remove('uwsgi')
+    restart_celery = False
+    if 'celery' in service_internal_names:
+        restart_celery = True
+        service_internal_names.remove('celery')
+    _supervisor_service_restart(service_internal_names)
+    if restart_celery:
+        # Celery restarted last because this probably includes current process
+        _reset_celery_thread_pool()
+

awx/settings/development.py

@@ -122,5 +122,5 @@ SERVICE_NAME_DICT = {
     "fact": "factcacher",
     "nginx": "nginx"}
 # Used for sending commands in automatic restart
-uWSGI_FIFO_LOCATION = '/awxfifo'
+UWSGI_FIFO_LOCATION = '/awxfifo'
 

awx/settings/production.py

@@ -67,7 +67,7 @@ SERVICE_NAME_DICT = {
     "daphne": "awx-daphne",
     "fact": "awx-fact-cache-receiver"}
 # Used for sending commands in automatic restart
-uWSGI_FIFO_LOCATION = '/var/lib/awx/awxfifo'
+UWSGI_FIFO_LOCATION = '/var/lib/awx/awxfifo'
 
 # Store a snapshot of default settings at this point before loading any
 # customizable config files.