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###############################################################################
# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems) #
# and others #
# #
# All rights reserved. This program and the accompanying materials #
# are made available under the terms of the Apache License, Version 2.0 #
# which accompanies this distribution, and is available at #
# http://www.apache.org/licenses/LICENSE-2.0 #
###############################################################################
import calendar
import re
import requests
import time
from utils.api_access_base import ApiAccessBase
from utils.string_utils import jsonify
class ApiAccess(ApiAccessBase):
ADMIN_PORT = "35357"
subject_token = None
initialized = False
regions = {}
tokens = {}
admin_endpoint = ""
admin_project = None
auth_response = {}
alternative_services = {
"neutron": ["quantum"]
}
# identity API v2 version with admin token
def __init__(self, config=None):
super().__init__('OpenStack', config)
self.base_url = "http://" + self.host + ":" + self.port
if self.initialized:
return
ApiAccess.admin_project = self.api_config.get("admin_project", "admin")
ApiAccess.admin_endpoint = "http://" + self.host + ":" + self.ADMIN_PORT
token = self.v2_auth_pwd(ApiAccess.admin_project)
if not token:
raise ValueError("Authentication failed. Failed to obtain token")
else:
self.subject_token = token
self.initialized = True
@staticmethod
def parse_time(time_str):
try:
time_struct = time.strptime(time_str, "%Y-%m-%dT%H:%M:%SZ")
except ValueError:
try:
time_struct = time.strptime(time_str,
"%Y-%m-%dT%H:%M:%S.%fZ")
except ValueError:
return None
return time_struct
# try to use existing token, if it did not expire
def get_existing_token(self, project_id):
try:
token_details = ApiAccess.tokens[project_id]
except KeyError:
return None
token_expiry = token_details["expires"]
token_expiry_time_struct = self.parse_time(token_expiry)
if not token_expiry_time_struct:
return None
token_expiry_time = token_details["token_expiry_time"]
now = time.time()
if now > token_expiry_time:
# token has expired
ApiAccess.tokens.pop(project_id)
return None
return token_details
def v2_auth(self, project_id, headers, post_body):
subject_token = self.get_existing_token(project_id)
if subject_token:
return subject_token
req_url = self.base_url + "/v2.0/tokens"
response = requests.post(req_url, json=post_body, headers=headers,
timeout=self.CONNECT_TIMEOUT)
response = response.json()
ApiAccess.auth_response[project_id] = response
if 'error' in response:
e = response['error']
self.log.error(str(e['code']) + ' ' + e['title'] + ': ' +
e['message'] + ", URL: " + req_url)
return None
try:
token_details = response["access"]["token"]
except KeyError:
# assume authentication failed
return None
token_expiry = token_details["expires"]
token_expiry_time_struct = self.parse_time(token_expiry)
if not token_expiry_time_struct:
return None
token_expiry_time = calendar.timegm(token_expiry_time_struct)
token_details["token_expiry_time"] = token_expiry_time
ApiAccess.tokens[project_id] = token_details
return token_details
def v2_auth_pwd(self, project):
user = self.api_config["user"]
pwd = self.api_config["pwd"]
post_body = {
"auth": {
"passwordCredentials": {
"username": user,
"password": pwd
}
}
}
if project is not None:
post_body["auth"]["tenantName"] = project
project_id = project
else:
project_id = ""
headers = {
'Accept': 'application/json',
'Content-Type': 'application/json; charset=UTF-8'
}
return self.v2_auth(project_id, headers, post_body)
@staticmethod
def get_auth_response(project_id):
auth_response = ApiAccess.auth_response.get(project_id)
if not auth_response:
auth_response = ApiAccess.auth_response.get('admin', {})
return auth_response
def get_region_url(self, region_name, service):
if region_name not in self.regions:
return None
region = self.regions[region_name]
s = self.get_service_region_endpoints(region, service)
if not s:
return None
orig_url = s["adminURL"]
# replace host name with the host found in config
url = re.sub(r"^([^/]+)//[^:]+", r"\1//" + self.host, orig_url)
return url
# like get_region_url(), but remove everything starting from the "/v2"
def get_region_url_nover(self, region, service):
full_url = self.get_region_url(region, service)
if not full_url:
self.log.error("could not find region URL for region: " + region)
exit()
url = re.sub(r":([0-9]+)/v[2-9].*", r":\1", full_url)
return url
def get_catalog(self, pretty):
return jsonify(self.regions, pretty)
# find the endpoints for a given service name,
# considering also alternative service names
def get_service_region_endpoints(self, region, service):
alternatives = [service]
endpoints = region["endpoints"]
if service in self.alternative_services:
alternatives.extend(self.alternative_services[service])
for sname in alternatives:
if sname in endpoints:
return endpoints[sname]
return None
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