# ================================================================================ # Copyright (c) 2017-2018 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. """client to talk to consul on standard port 8500""" import base64 import json import requests from cloudify import ctx from cloudify.exceptions import NonRecoverableError # it is safe to assume that consul agent is at consul:8500 # define consul alis in /etc/hosts on cloudify manager vm # $ cat /etc/hosts # 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 consul CONSUL_SERVICE_URL = "http://consul:8500/v1/catalog/service/{0}" CONSUL_KV_MASK = "http://consul:8500/v1/kv/{0}" def discover_service_url(service_name): """find the service record in consul""" service_url = CONSUL_SERVICE_URL.format(service_name) ctx.logger.info("getting service_url at {0}".format(service_url)) try: response = requests.get(service_url) except requests.ConnectionError as ex: raise NonRecoverableError( "ConnectionError - failed to get {0}: {1}".format(service_url, str(ex))) ctx.logger.info("got {0} for service_url at {1} response: {2}" .format(response.status_code, service_url, response.text)) if response.status_code != requests.codes.ok: return resp_json = response.json() if resp_json: service = resp_json[0] return "http://{0}:{1}".format(service["ServiceAddress"], service["ServicePort"]) def discover_value(key): """get the value for the key from consul-kv""" kv_url = CONSUL_KV_MASK.format(key) ctx.logger.info("getting kv at {0}".format(kv_url)) try: response = requests.get(kv_url) except requests.ConnectionError as ex: raise NonRecoverableError( "ConnectionError - failed to get {0}: {1}".format(kv_url, str(ex))) ctx.logger.info("got {0} for kv at {1} response: {2}" .format(response.status_code, kv_url, response.text)) if response.status_code != requests.codes.ok: return data = response.json() if not data: ctx.logger.error("failed discover_value %s", key) return value = base64.b64decode(data[0]["Value"]).decode("utf-8") ctx.logger.info("consul-kv key=%s value(%s) data=%s", key, value, json.dumps(data)) return json.loads(value)