Add a --logdir flag that will be prepended to the logfile setting. This makes it easier to share a flagfile between multiple workers while still having separate log files.

nova/server.py

@@ -42,6 +42,7 @@ flags.DEFINE_bool('daemonize', False, 'daemonize this process')
 #              clutter.
 flags.DEFINE_bool('use_syslog', True, 'output to syslog when daemonizing')
 flags.DEFINE_string('logfile', None, 'log file to output to')
+flags.DEFINE_string('logdir',  None, 'directory to keep log files in (will be prepended to $logfile)')
 flags.DEFINE_string('pidfile', None, 'pid file to output to')
 flags.DEFINE_string('working_directory', './', 'working directory...')
 flags.DEFINE_integer('uid', os.getuid(), 'uid under which to run')
@@ -119,6 +120,8 @@ def daemonize(args, name, main):
         else:
             if not FLAGS.logfile:
                 FLAGS.logfile = '%s.log' % name
+            if FLAGS.logdir:
+                FLAGS.logfile = os.path.join(FLAGS.logdir, FLAGS.logfile)
             logfile = logging.FileHandler(FLAGS.logfile)
             logfile.setFormatter(formatter)
             logger.addHandler(logfile)

nova/twistd.py

@@ -43,7 +43,7 @@ else:
 
 
 FLAGS = flags.FLAGS
-
+flags.DEFINE_string('logdir',  None, 'directory to keep log files in (will be prepended to $logfile)')
 
 class TwistdServerOptions(ServerOptions):
     def parseArgs(self, *args):
@@ -246,6 +246,8 @@ def serve(filename):
         FLAGS.logfile = '%s.log' % name
     elif FLAGS.logfile.endswith('twistd.log'):
         FLAGS.logfile = FLAGS.logfile.replace('twistd.log', '%s.log' % name)
+    if FLAGS.logdir:
+        FLAGS.logfile = os.path.join(FLAGS.logdir, FLAGS.logfile)
     if not FLAGS.prefix:
         FLAGS.prefix = name
     elif FLAGS.prefix.endswith('twisted'):