Define keymaster log routes on the class

... instead of having KmipKeyMaster instantiate its own logger
inside of _get_root_secret.

Bonus: KmsKeyMaster uses its own log route now.

Bonus bonus: get rid of KmsKeyMaster's pointlessly-overriden
__init__ method.

Change-Id: Idb4b832e5ca0e3d749fe2c0b7ba283447a4dc69e

swift/common/middleware/crypto/keymaster.py

@@ -18,7 +18,7 @@ import os
 
 from swift.common.middleware.crypto.crypto_utils import CRYPTO_KEY_CALLBACK
 from swift.common.swob import Request, HTTPException
-from swift.common.utils import readconf, strict_b64decode
+from swift.common.utils import readconf, strict_b64decode, get_logger
 from swift.common.wsgi import WSGIContext
 
 
@@ -106,9 +106,11 @@ class KeyMaster(object):
     random number generator. Changing the root secret is likely to result in
     data loss.
     """
+    log_route = 'keymaster'
 
     def __init__(self, app, conf):
         self.app = app
+        self.logger = get_logger(conf, log_route=self.log_route)
         self.keymaster_config_path = conf.get('keymaster_config_path')
         # The _get_root_secret() function is overridden by other keymasters
         self.root_secret = self._get_root_secret(conf)

swift/common/middleware/crypto/kmip_keymaster.py

@@ -17,7 +17,7 @@ import logging
 import os
 
 from swift.common.middleware.crypto import keymaster
-from swift.common.utils import readconf, get_logger
+from swift.common.utils import readconf
 
 from kmip.pie.client import ProxyKmipClient
 
@@ -79,8 +79,9 @@ example::
 
 
 class KmipKeyMaster(keymaster.KeyMaster):
+    log_route = 'kmip_keymaster'
+
     def _get_root_secret(self, conf):
-        self.logger = get_logger(conf, log_route='kmip_keymaster')
         if self.keymaster_config_path:
             keymaster_opts = ['host', 'port', 'certfile', 'keyfile',
                               'ca_certs', 'username', 'password', 'key_id']

swift/common/middleware/crypto/kms_keymaster.py

@@ -28,11 +28,7 @@ class KmsKeyMaster(KeyMaster):
     proxy-server.conf file, or in the configuration pointed to using the
     keymaster_config_path configuration value in the proxy-server.conf file.
     """
-
-    def __init__(self, app, conf):
-        # Call the superclass __init__() method, which calls the overridden
-        # self._get_root_secret() below.
-        super(KmsKeyMaster, self).__init__(app, conf)
+    log_route = 'kms_keymaster'
 
     def _get_root_secret(self, conf):
         """