Clean up logging levels

The following logging levels are set according to the combination of
--verbose, --quiet and --debug options:

verbose_level   logging level       options
0               --quiet             ERROR
1               (none)              WARNING
2               --verbose           INFO
3+              --verbose --verbose DEBUG
                or --debug

Logging levels for the requests and iso8601 modules are forced to ERROR.

This is the first step in bp use-logging-not-print

The difference between '--debug' and '--verbose --verbose' is --debug triggers
cliff's exception handling and traceback display.

Change-Id: Ide2233b3316471d279260fb1e7255a6ca2072023

Author: Dean Troyer

openstackclient/common/commandmanager.py

@@ -37,7 +37,6 @@ def _load_commands(self, group=None):
             group = self.namespace
         self.group_list.append(group)
         for ep in pkg_resources.iter_entry_points(group):
-            LOG.debug('found command %r', ep.name)
             cmd_name = (
                 ep.name.replace('_', ' ')
                 if self.convert_underscores

openstackclient/shell.py

@@ -123,6 +123,50 @@ def __init__(self):
                     help="Show this help message and exit",
                 )
 
+    def configure_logging(self):
+        """Configure logging for the app
+
+        Cliff sets some defaults we don't want so re-work it a bit
+        """
+
+        if self.options.debug:
+            # --debug forces verbose_level 3
+            # Set this here so cliff.app.configure_logging() can work
+            self.options.verbose_level = 3
+
+        super(OpenStackShell, self).configure_logging()
+        root_logger = logging.getLogger('')
+
+        # Requests logs some stuff at INFO that we don't want
+        # unless we have DEBUG
+        requests_log = logging.getLogger("requests")
+        requests_log.setLevel(logging.ERROR)
+
+        # Other modules we don't want DEBUG output for so
+        # don't reset them below
+        iso8601_log = logging.getLogger("iso8601")
+        iso8601_log.setLevel(logging.ERROR)
+
+        # Set logging to the requested level
+        self.dump_stack_trace = False
+        if self.options.verbose_level == 0:
+            # --quiet
+            root_logger.setLevel(logging.ERROR)
+        elif self.options.verbose_level == 1:
+            # This is the default case, no --debug, --verbose or --quiet
+            root_logger.setLevel(logging.WARNING)
+        elif self.options.verbose_level == 2:
+            # One --verbose
+            root_logger.setLevel(logging.INFO)
+        elif self.options.verbose_level >= 3:
+            # Two or more --verbose
+            root_logger.setLevel(logging.DEBUG)
+            requests_log.setLevel(logging.DEBUG)
+
+        if self.options.debug:
+            # --debug forces traceback
+            self.dump_stack_trace = True
+
     def run(self, argv):
         try:
             return super(OpenStackShell, self).run(argv)
@@ -401,15 +445,6 @@ def initialize_app(self, argv):
 
         super(OpenStackShell, self).initialize_app(argv)
 
-        # Set requests logging to a useful level
-        requests_log = logging.getLogger("requests")
-        if self.options.debug:
-            requests_log.setLevel(logging.DEBUG)
-            self.dump_stack_trace = True
-        else:
-            requests_log.setLevel(logging.WARNING)
-            self.dump_stack_trace = False
-
         # Save default domain
         self.default_domain = self.options.os_default_domain