Use oslo.log library instead of system logging module

The constants of log levels were added in the 1.8 version of
the oslo.log library. So we can replace all usage of system
logging module with log module from oslo.log.

Change-Id: I2992df0bec6337aefa8a75d4853b132bd134fa42
Closes-Bug: 1481370

neutron/common/utils.py

@@ -22,7 +22,6 @@ import datetime
 import errno
 import functools
 import hashlib
-import logging as std_logging
 import multiprocessing
 import netaddr
 import os
@@ -282,7 +281,7 @@ def is_extension_supported(plugin, ext_alias):
 
 
 def log_opt_values(log):
-    cfg.CONF.log_opt_values(log, std_logging.DEBUG)
+    cfg.CONF.log_opt_values(log, logging.DEBUG)
 
 
 def get_random_mac(base_mac):

neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py

@@ -14,7 +14,6 @@
 #    under the License.
 
 import hashlib
-import logging as std_logging
 import signal
 import sys
 import time
@@ -1660,7 +1659,7 @@ class OVSNeutronAgent(sg_rpc.SecurityGroupAgentRpcCallbackMixin,
             self.conf.reload_config_files()
             config.setup_logging()
             LOG.debug('Full set of CONF:')
-            self.conf.log_opt_values(LOG, std_logging.DEBUG)
+            self.conf.log_opt_values(LOG, logging.DEBUG)
             self.catch_sighup = False
         return self.run_daemon_loop
 

neutron/policy.py

@@ -18,7 +18,6 @@ Policy engine for neutron.  Largely copied from nova.
 """
 
 import collections
-import logging as std_logging
 import re
 
 from oslo_config import cfg
@@ -314,7 +313,7 @@ def _prepare_check(context, action, target, pluralized):
 
 
 def log_rule_list(match_rule):
-    if LOG.isEnabledFor(std_logging.DEBUG):
+    if LOG.isEnabledFor(logging.DEBUG):
         rules = _process_rules_list([], match_rule)
         LOG.debug("Enforcing rules: %s", rules)
 

neutron/tests/functional/db/test_migrations.py

@@ -13,7 +13,6 @@
 #    under the License.
 
 import functools
-import logging
 import pprint
 
 import alembic
@@ -32,9 +31,6 @@ from neutron.db.migration import cli as migration
 from neutron.db.migration.models import head as head_models
 from neutron.tests.common import base
 
-LOG = logging.getLogger(__name__)
-
-
 cfg.CONF.import_opt('core_plugin', 'neutron.common.config')
 
 CORE_PLUGIN = 'neutron.plugins.ml2.plugin.Ml2Plugin'

neutron/tests/tempest/config.py

@@ -15,7 +15,6 @@
 
 from __future__ import print_function
 
-import logging as std_logging
 import os
 
 from oslo_config import cfg
@@ -1191,7 +1190,7 @@ class TempestConfigPrivate(object):
         register_opts()
         self._set_attrs()
         if parse_conf:
-            cfg.CONF.log_opt_values(LOG, std_logging.DEBUG)
+            cfg.CONF.log_opt_values(LOG, logging.DEBUG)
 
 
 class TempestConfigProxy(object):
@@ -1199,15 +1198,15 @@ class TempestConfigProxy(object):
     _path = None
 
     _extra_log_defaults = [
-        ('keystoneclient.session', std_logging.INFO),
+        ('keystoneclient.session', logging.INFO),
-        ('paramiko.transport', std_logging.INFO),
+        ('paramiko.transport', logging.INFO),
-        ('requests.packages.urllib3.connectionpool', std_logging.WARN),
+        ('requests.packages.urllib3.connectionpool', logging.WARN),
     ]
 
     def _fix_log_levels(self):
         """Tweak the oslo log defaults."""
         for name, level in self._extra_log_defaults:
-            std_logging.getLogger(name).setLevel(level)
+            logging.getLogger(name).logger.setLevel(level)
 
     def __getattr__(self, attr):
         if not self._config:

neutron/tests/unit/plugins/ml2/drivers/test_helpers.py

@@ -14,9 +14,9 @@
 #    under the License.
 
 import fixtures
-import logging as std_logging
 import mock
 from oslo_db import exception as exc
+from oslo_log import log as logging
 from sqlalchemy.orm import query
 
 import neutron.db.api as db
@@ -47,7 +47,7 @@ class HelpersTest(testlib_api.SqlTestCase):
             fixtures.FakeLogger(
                 name=helpers.__name__,
                 format=base.LOG_FORMAT,
-                level=std_logging.DEBUG
+                level=logging.DEBUG
             ))
 
     def check_raw_segment(self, expected, observed):

neutron/wsgi.py

@@ -19,7 +19,6 @@ Utility methods for working with WSGI servers
 from __future__ import print_function
 
 import errno
-import logging as std_logging
 import os
 import socket
 import ssl
@@ -240,7 +239,7 @@ class Server(object):
             # The API service should run in the current process.
             self._server = service
             # Dump the initial option values
-            cfg.CONF.log_opt_values(LOG, std_logging.DEBUG)
+            cfg.CONF.log_opt_values(LOG, logging.DEBUG)
             service.start()
             systemd.notify_once()
         else: