blob: 7e16b907fe28f14875f9c1c5998db9f349049381 (
plain)
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
|
"""client to talk to consul at the standard port 8500"""
# 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 logging
import json
import base64
import requests
class DiscoveryClient(object):
"""talking to consul at http://consul:8500
relies on proper --add-host "consul:<consul-agent ip>" in
docker run command that runs along the consul-agent:
docker run --name ${APPNAME} -d
-e HOSTNAME
--add-host "consul:<consul-agent ip>"
-v ${BASEDIR}/logs:${TARGETDIR}/logs
-v ${BASEDIR}/etc:${TARGETDIR}/etc
-p <outport>:<innerport>
${APPNAME}:latest
"""
CONSUL_SERVICE_MASK = "http://consul:8500/v1/catalog/service/{0}"
CONSUL_KV_MASK = "http://consul:8500/v1/kv/{0}"
SERVICE_MASK = "http://{0}:{1}"
_logger = logging.getLogger("policy_handler.discovery")
@staticmethod
def get_service_url(service_name):
"""find the service record in consul"""
service_path = DiscoveryClient.CONSUL_SERVICE_MASK.format(service_name)
DiscoveryClient._logger.info("discover %s", service_path)
response = requests.get(service_path)
response.raise_for_status()
service = response.json()[0]
return DiscoveryClient.SERVICE_MASK.format( \
service["ServiceAddress"], service["ServicePort"])
@staticmethod
def get_value(key):
"""get the value for the key from consul-kv"""
response = requests.get(DiscoveryClient.CONSUL_KV_MASK.format(key))
response.raise_for_status()
data = response.json()[0]
value = base64.b64decode(data["Value"]).decode("utf-8")
DiscoveryClient._logger.info("consul-kv key=%s data=%s value(%s)", \
key, json.dumps(data), value)
return json.loads(value)
@staticmethod
def put_kv(key, value):
"""put the value under the key in consul-kv"""
response = requests.put(DiscoveryClient.CONSUL_KV_MASK.format(key), data=value)
response.raise_for_status()
|
