Making bottle base requests size configurable

Earlier bottle.BaseRequest.MEMFILE_MAX was hard coded to 1024000 in
vnc_cfg_api_server.py.
Adding config. parameter "max_request_size" to enable setting of
bottle.BaseRequest.MEMFILE_MAX through contrail-api.conf file.

Change-Id: I8a4d9e2ee7cf2c362647070bdd1865254f297236
Closes-Bug: #1701093

src/config/api-server/contrail-api.conf

@@ -4,6 +4,8 @@ log_level = SYS_NOTICE
 log_local = 1
 cassandra_server_list = 127.0.0.1:9160
 #collectors = ip1:8086 ip2:8086
+# To set bottle.BaseRequest.MEMFILE_MAX
+# max_request_size = 1024000
 
 # (StrOpt) default encoding to use for string resources.
 # this is optional variable. Define it if you want to override

src/config/api-server/utils.py

@@ -88,6 +88,7 @@ def parse_args(args_str):
         'object_cache_entries': '10000', # max number of objects cached for read
         'object_cache_exclude_types': '', # csv of object types to *not* cache
         'db_engine': 'cassandra',
+        'max_request_size': 1024000,
     }
     defaults.update(SandeshConfig.get_default_options(['DEFAULTS']))
     # keystone options
@@ -294,6 +295,8 @@ def parse_args(args_str):
             help="Comma separated values of object types to not cache")
     parser.add_argument("--db_engine",
         help="Database engine to use, default cassandra")
+    parser.add_argument("--max_request_size", type=int,
+            help="Maximum size of bottle requests served by api server")
     SandeshConfig.add_parser_arguments(parser)
     args_obj, remaining_argv = parser.parse_known_args(remaining_argv)
     args_obj.conf_file = args.conf_file

src/config/api-server/vnc_cfg_api_server.py

@@ -60,7 +60,6 @@
 CONFIG_VERSION = '1.0'
 
 import bottle
-bottle.BaseRequest.MEMFILE_MAX = 1024000
 
 import utils
 import context
@@ -1257,6 +1256,9 @@ def __init__(self, args_str=None):
             args_str = ' '.join(sys.argv[1:])
         self._parse_args(args_str)
 
+        # set the max size of the api requests
+        bottle.BaseRequest.MEMFILE_MAX = self._args.max_request_size
+
         # aaa-mode is ignored if multi_tenancy is configured by user
         if self._args.multi_tenancy is None:
             # MT unconfigured by user - determine from aaa-mode
@@ -2395,6 +2397,7 @@ def _parse_args(self, args_str):
                                          [--default_encoding ascii ]
                                          --object_cache_size 10000
                                          --object_cache_exclude_types ''
+                                         --max_request_size 1024000
         '''
         self._args, _ = utils.parse_args(args_str)
     # end _parse_args