1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
"""read and use the config"""
# org.onap.dcae
# ================================================================================
# Copyright (c) 2017 AT&T Intellectual Property. All rights reserved.
# ================================================================================
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============LICENSE_END=========================================================
#
# ECOMP is a trademark and service mark of AT&T Intellectual Property.
import os
import json
import copy
import base64
import logging
import logging.config
from .discovery import DiscoveryClient
logging.basicConfig(
filename='logs/policy_handler.log', \
format='%(asctime)s.%(msecs)03d %(levelname)+8s ' + \
'%(threadName)s %(name)s.%(funcName)s: %(message)s', \
datefmt='%Y%m%d_%H%M%S', level=logging.DEBUG)
class Config(object):
"""main config of the application"""
CONFIG_FILE_PATH = "etc/config.json"
LOGGER_CONFIG_FILE_PATH = "etc/common_logger.config"
SERVICE_NAME_POLICY_HANDLER = "policy_handler"
FIELD_SYSTEM = "system"
FIELD_WSERVICE_PORT = "wservice_port"
FIELD_POLICY_ENGINE = "policy_engine"
wservice_port = 25577
_logger = logging.getLogger("policy_handler.config")
config = None
@staticmethod
def merge(new_config):
"""merge the new_config into current config - override the values"""
if not new_config:
return
if not Config.config:
Config.config = new_config
return
new_config = copy.deepcopy(new_config)
Config.config.update(new_config)
@staticmethod
def get_system_name():
"""find the name of the policy-handler system
to be used as the key in consul-kv for config of policy-handler
"""
system_name = None
if Config.config:
system_name = Config.config.get(Config.FIELD_SYSTEM)
return system_name or Config.SERVICE_NAME_POLICY_HANDLER
@staticmethod
def discover():
"""bring and merge the config settings from the discovery service"""
discovery_key = Config.get_system_name()
new_config = DiscoveryClient.get_value(discovery_key)
if not new_config or not isinstance(new_config, dict):
Config._logger.warn("unexpected config from discovery: %s", new_config)
return
Config._logger.debug("loaded config from discovery(%s): %s", \
discovery_key, json.dumps(new_config))
Config._logger.debug("config before merge from discovery: %s", json.dumps(Config.config))
Config.merge(new_config.get(Config.SERVICE_NAME_POLICY_HANDLER))
Config._logger.debug("merged config from discovery: %s", json.dumps(Config.config))
@staticmethod
def upload_to_discovery():
"""upload the current config settings to the discovery service"""
if not Config.config or not isinstance(Config.config, dict):
Config._logger.error("unexpected config: %s", Config.config)
return
discovery_key = Config.get_system_name()
latest_config = json.dumps({Config.SERVICE_NAME_POLICY_HANDLER:Config.config})
DiscoveryClient.put_kv(discovery_key, latest_config)
Config._logger.debug("uploaded config to discovery(%s): %s", \
discovery_key, latest_config)
@staticmethod
def load_from_file(file_path=None):
"""read and store the config from config file"""
if not file_path:
file_path = Config.CONFIG_FILE_PATH
loaded_config = None
if os.access(file_path, os.R_OK):
with open(file_path, 'r') as config_json:
loaded_config = json.load(config_json)
if not loaded_config:
Config._logger.info("config not loaded from file: %s", file_path)
return
Config._logger.info("config loaded from file: %s", file_path)
logging_config = loaded_config.get("logging")
if logging_config:
logging.config.dictConfig(logging_config)
Config.wservice_port = loaded_config.get(Config.FIELD_WSERVICE_PORT, Config.wservice_port)
Config.merge(loaded_config.get(Config.SERVICE_NAME_POLICY_HANDLER))
return True
class PolicyEngineConfig(object):
"""main config of the application"""
# PATH_TO_PROPERTIES = r'logs/policy_engine.properties'
PATH_TO_PROPERTIES = r'tmp/policy_engine.properties'
PYPDP_URL = "PYPDP_URL = {0}{1}, {2}, {3}\n"
CLIENT_ID = "CLIENT_ID = {0}\n"
CLIENT_KEY = "CLIENT_KEY = {0}\n"
ENVIRONMENT = "ENVIRONMENT = {0}\n"
_logger = logging.getLogger("policy_handler.pe_config")
@staticmethod
def save_to_file():
"""create the policy_engine.properties for policy-engine client"""
file_path = PolicyEngineConfig.PATH_TO_PROPERTIES
try:
config = Config.config[Config.FIELD_POLICY_ENGINE]
headers = config["headers"]
client_parts = base64.b64decode(headers["ClientAuth"].split()[1]).split(":")
auth_parts = base64.b64decode(headers["Authorization"].split()[1]).split(":")
props = PolicyEngineConfig.PYPDP_URL.format(config["url"], config["path_pdp"],
auth_parts[0], auth_parts[1])
props += PolicyEngineConfig.CLIENT_ID.format(client_parts[0])
props += PolicyEngineConfig.CLIENT_KEY.format(base64.b64encode(client_parts[1]))
props += PolicyEngineConfig.ENVIRONMENT.format(headers["Environment"])
with open(file_path, 'w') as prp_file:
prp_file.write(props)
PolicyEngineConfig._logger.info("created %s", file_path)
except IOError:
PolicyEngineConfig._logger.error("failed to save to %s", file_path)
except KeyError:
PolicyEngineConfig._logger.error("unexpected config for %s", Config.FIELD_POLICY_ENGINE)
|
