1 # ================================================================================
2 # Copyright (c) 2017-2020 AT&T Intellectual Property. All rights reserved.
3 # ================================================================================
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
15 # ============LICENSE_END=========================================================
18 """client to talk to consul on standard port 8500"""
24 from cloudify import ctx
25 from cloudify.exceptions import NonRecoverableError
27 # it is safe to assume that consul agent is at consul:8500
28 # define consul alis in /etc/hosts on cloudify manager vm
30 # 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 consul
32 CONSUL_SERVICE_URL = "http://consul:8500/v1/catalog/service/{0}"
33 CONSUL_KV_MASK = "http://consul:8500/v1/kv/{0}"
36 def discover_service_url(service_name):
37 """find the service record in consul"""
38 service_url = CONSUL_SERVICE_URL.format(service_name)
39 ctx.logger.info("getting service_url at {0}".format(service_url))
42 response = requests.get(service_url, timeout=60)
43 except requests.ConnectionError as ex:
44 raise NonRecoverableError(
45 "ConnectionError - failed to get {0}: {1}".format(service_url, str(ex)))
47 ctx.logger.info("got {0} for service_url at {1} response: {2}"
48 .format(response.status_code, service_url, response.text))
50 if response.status_code != requests.codes.ok:
53 resp_json = response.json()
55 service = resp_json[0]
56 return "http://{0}:{1}".format(service["ServiceAddress"], service["ServicePort"])
59 def discover_value(key):
60 """get the value for the key from consul-kv"""
61 kv_url = CONSUL_KV_MASK.format(key)
62 ctx.logger.info("getting kv at {0}".format(kv_url))
65 response = requests.get(kv_url, timeout=60)
66 except requests.ConnectionError as ex:
67 raise NonRecoverableError(
68 "ConnectionError - failed to get {0}: {1}".format(kv_url, str(ex)))
70 ctx.logger.info("got {0} for kv at {1} response: {2}"
71 .format(response.status_code, kv_url, response.text))
73 if response.status_code != requests.codes.ok:
76 data = response.json()
78 ctx.logger.error("failed discover_value %s", key)
80 value = base64.b64decode(data[0]["Value"]).decode("utf-8")
81 ctx.logger.info("consul-kv key=%s value(%s) data=%s",
82 key, value, json.dumps(data))
83 return json.loads(value)