Implemented base + moved plugins & service conf

In this changeset, I implemented the main logic although this is
mainly a shameful copy/paste of Nova's blueprint
https://blueprints.launchpad.net/nova/+spec/centralize-config-options

Partially Implements: blueprint centralise-config-opts

Change-Id: Ib645ad5da5c706336bb6ac37e85b027d05665c32

watcher/cmd/api.py

@@ -24,13 +24,14 @@ from oslo_log import log as logging
 
 from watcher._i18n import _LI
 from watcher.common import service
+from watcher import conf
 
 LOG = logging.getLogger(__name__)
-CONF = cfg.CONF
+CONF = conf.CONF
 
 
 def main():
-    service.prepare_service(sys.argv)
+    service.prepare_service(sys.argv, CONF)
 
     host, port = cfg.CONF.api.host, cfg.CONF.api.port
     protocol = "http" if not CONF.api.enable_ssl_api else "https"

watcher/cmd/applier.py

@@ -20,19 +20,19 @@
 import os
 import sys
 
-from oslo_config import cfg
 from oslo_log import log as logging
 
 from watcher._i18n import _LI
 from watcher.applier import manager
 from watcher.common import service as watcher_service
+from watcher import conf
 
 LOG = logging.getLogger(__name__)
-CONF = cfg.CONF
+CONF = conf.CONF
 
 
 def main():
-    watcher_service.prepare_service(sys.argv)
+    watcher_service.prepare_service(sys.argv, CONF)
 
     LOG.info(_LI('Starting Watcher Applier service in PID %s'), os.getpid())
 

watcher/cmd/dbmanage.py

@@ -24,10 +24,11 @@ import sys
 from oslo_config import cfg
 
 from watcher.common import service
+from watcher import conf
 from watcher.db import migration
 from watcher.db import purge
 
-CONF = cfg.CONF
+CONF = conf.CONF
 
 
 class DBCommand(object):
@@ -152,5 +153,5 @@ def main():
     if not set(sys.argv).intersection(valid_commands):
         sys.argv.append('upgrade')
 
-    service.prepare_service(sys.argv)
+    service.prepare_service(sys.argv, CONF)
     CONF.command.func()

watcher/cmd/decisionengine.py

@@ -20,22 +20,22 @@
 import os
 import sys
 
-from oslo_config import cfg
 from oslo_log import log as logging
 
 from watcher._i18n import _LI
 from watcher.common import service as watcher_service
+from watcher import conf
 from watcher.decision_engine import gmr
 from watcher.decision_engine import manager
 from watcher.decision_engine import scheduling
 from watcher.decision_engine import sync
 
 LOG = logging.getLogger(__name__)
-CONF = cfg.CONF
+CONF = conf.CONF
 
 
 def main():
-    watcher_service.prepare_service(sys.argv)
+    watcher_service.prepare_service(sys.argv, CONF)
     gmr.register_gmr_plugins()
 
     LOG.info(_LI('Starting Watcher Decision Engine service in PID %s'),

watcher/cmd/sync.py

@@ -24,15 +24,17 @@ from oslo_log import log as logging
 
 from watcher._i18n import _LI
 from watcher.common import service as service
+from watcher import conf
 from watcher.decision_engine import sync
 
 LOG = logging.getLogger(__name__)
+CONF = conf.CONF
 
 
 def main():
     LOG.info(_LI('Watcher sync started.'))
 
-    service.prepare_service(sys.argv)
+    service.prepare_service(sys.argv, CONF)
     syncer = sync.Syncer()
     syncer.sync()