1 # ================================================================================
2 # Copyright (c) 2017-2019 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=========================================================
17 # ECOMP is a trademark and service mark of AT&T Intellectual Property.
19 """client to talk to consul on standard port 8500"""
25 from cloudify import ctx
26 from cloudify.exceptions import NonRecoverableError
28 # it is safe to assume that consul agent is at consul:8500
29 # define consul alis in /etc/hosts on cloudify manager vm
31 # 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 consul
33 CONSUL_SERVICE_URL = "http://consul:8500/v1/catalog/service/{0}"
34 CONSUL_KV_MASK = "http://consul:8500/v1/kv/{0}"
37 def discover_service_url(service_name):
38 """find the service record in consul"""
39 service_url = CONSUL_SERVICE_URL.format(service_name)
40 ctx.logger.info("getting service_url at {0}".format(service_url))
43 response = requests.get(service_url, timeout=60)
44 except requests.ConnectionError as ex:
45 raise NonRecoverableError(
46 "ConnectionError - failed to get {0}: {1}".format(service_url, str(ex)))
48 ctx.logger.info("got {0} for service_url at {1} response: {2}"
49 .format(response.status_code, service_url, response.text))
51 if response.status_code != requests.codes.ok:
54 resp_json = response.json()
56 service = resp_json[0]
57 return "http://{0}:{1}".format(service["ServiceAddress"], service["ServicePort"])
60 def discover_value(key):
61 """get the value for the key from consul-kv"""
62 kv_url = CONSUL_KV_MASK.format(key)
63 ctx.logger.info("getting kv at {0}".format(kv_url))
66 response = requests.get(kv_url, timeout=60)
67 except requests.ConnectionError as ex:
68 raise NonRecoverableError(
69 "ConnectionError - failed to get {0}: {1}".format(kv_url, str(ex)))
71 ctx.logger.info("got {0} for kv at {1} response: {2}"
72 .format(response.status_code, kv_url, response.text))
74 if response.status_code != requests.codes.ok:
77 data = response.json()
79 ctx.logger.error("failed discover_value %s", key)
81 value = base64.b64decode(data[0]["Value"]).decode("utf-8")
82 ctx.logger.info("consul-kv key=%s value(%s) data=%s",
83 key, value, json.dumps(data))
84 return json.loads(value)