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|
#
# Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
#
import logging
import requests
from requests.exceptions import ConnectionError
import ConfigParser
import pprint
import json
import sys
import time
import platform
import __main__ as main
import gen.resource_common
from gen.resource_xsd import *
from gen.resource_client import *
from gen.vnc_api_client_gen import VncApiClientGen
from cfgm_common import rest, utils
from cfgm_common.exceptions import *
from pprint import pformat
def str_to_class(class_name):
try:
return reduce(getattr, class_name.split("."), sys.modules[__name__])
except Exception as e:
logger = logging.getLogger(__name__)
logger.warn("Exception: %s", str(e))
return None
#end str_to_class
def _read_cfg(cfg_parser, section, option, default):
try:
val = cfg_parser.get(section, option)
except (AttributeError,
ConfigParser.NoOptionError,
ConfigParser.NoSectionError):
val = default
return val
#end _read_cfg
class ActionUriDict(dict):
"""Action uri dictionary with operator([]) overloading to parse home page
and populate the action_uri, if not populated already.
"""
def __init__(self, vnc_api, *args, **kwargs):
dict.__init__(self, args, **kwargs)
self.vnc_api = vnc_api
def __getitem__(self, key):
try:
return dict.__getitem__(self, key)
except KeyError:
homepage = self.vnc_api._request(rest.OP_GET, self.vnc_api._base_url,
retry_on_error=False)
self.vnc_api._cfg_root_url = self.vnc_api._parse_homepage(homepage)
return dict.__getitem__(self, key)
class VncApi(VncApiClientGen):
_DEFAULT_WEB_SERVER = "127.0.0.1"
hostname = platform.node()
_DEFAULT_HEADERS = {
'Content-type': 'application/json; charset="UTF-8"',
'X-Contrail-Useragent': '%s:%s'
%(hostname, getattr(main, '__file__', '')),
}
_AUTHN_SUPPORTED_TYPES = ["keystone"]
_DEFAULT_AUTHN_TYPE = "keystone"
_DEFAULT_AUTHN_HEADERS = _DEFAULT_HEADERS
_DEFAULT_AUTHN_PROTOCOL = "http"
_DEFAULT_AUTHN_SERVER = _DEFAULT_WEB_SERVER
_DEFAULT_AUTHN_PORT = 35357
_DEFAULT_AUTHN_URL = "/v2.0/tokens"
_DEFAULT_AUTHN_USER = ""
_DEFAULT_AUTHN_PASSWORD = ""
_DEFAULT_AUTHN_TENANT = VncApiClientGen._tenant_name
# Connection to api-server through Quantum
_DEFAULT_WEB_PORT = 8082
_DEFAULT_BASE_URL = "/"
# The number of items beyond which instead of GET /<collection>
# a POST /list-bulk-collection is issued
POST_FOR_LIST_THRESHOLD = 25
def __init__(self, username=None, password=None, tenant_name=None,
api_server_host='127.0.0.1', api_server_port='8082',
api_server_url=None, conf_file=None, user_info=None,
auth_token=None, auth_host=None, auth_port=None,
auth_protocol = None, auth_url=None, auth_type=None,
wait_for_connect=False):
# TODO allow for username/password to be present in creds file
super(VncApi, self).__init__(self._obj_serializer_diff)
cfg_parser = ConfigParser.ConfigParser()
try:
cfg_parser.read(conf_file or
"/etc/contrail/vnc_api_lib.ini")
except Exception as e:
logger = logging.getLogger(__name__)
logger.warn("Exception: %s", str(e))
# keystone
self._authn_type = auth_type or \
_read_cfg(cfg_parser, 'auth', 'AUTHN_TYPE',
self._DEFAULT_AUTHN_TYPE)
if self._authn_type == 'keystone':
self._authn_protocol = auth_protocol or \
_read_cfg(cfg_parser, 'auth', 'AUTHN_PROTOCOL',
self._DEFAULT_AUTHN_PROTOCOL)
self._authn_server = auth_host or \
_read_cfg(cfg_parser, 'auth', 'AUTHN_SERVER',
self._DEFAULT_AUTHN_SERVER)
self._authn_port = auth_port or \
_read_cfg(cfg_parser, 'auth', 'AUTHN_PORT',
self._DEFAULT_AUTHN_PORT)
self._authn_url = auth_url or \
_read_cfg(cfg_parser, 'auth', 'AUTHN_URL',
self._DEFAULT_AUTHN_URL)
self._username = username or \
_read_cfg(cfg_parser, 'auth', 'AUTHN_USER',
self._DEFAULT_AUTHN_USER)
self._password = password or \
_read_cfg(cfg_parser, 'auth', 'AUTHN_PASSWORD',
self._DEFAULT_AUTHN_PASSWORD)
self._tenant_name = tenant_name or \
_read_cfg(cfg_parser, 'auth', 'AUTHN_TENANT',
self._DEFAULT_AUTHN_TENANT)
self._authn_body = \
'{"auth":{"passwordCredentials":{' + \
'"username": "%s",' % (self._username) + \
' "password": "%s"},' % (self._password) + \
' "tenantName":"%s"}}' % (self._tenant_name)
self._user_info = user_info
if not api_server_host:
self._web_host = _read_cfg(cfg_parser, 'global', 'WEB_SERVER',
self._DEFAULT_WEB_SERVER)
else:
self._web_host = api_server_host
if not api_server_port:
self._web_port = _read_cfg(cfg_parser, 'global', 'WEB_PORT',
self._DEFAULT_WEB_PORT)
else:
self._web_port = api_server_port
# Where client's view of world begins
if not api_server_url:
self._base_url = _read_cfg(cfg_parser, 'global', 'BASE_URL',
self._DEFAULT_BASE_URL)
else:
self._base_url = api_server_url
# Where server says its root is when _base_url is fetched
self._srv_root_url = None
# Type-independent actions offered by server
self._action_uri = ActionUriDict(self)
self._headers = self._DEFAULT_HEADERS.copy()
self._headers[rest.hdr_client_tenant()] = self._tenant_name
self._auth_token_input = False
self._auth_token = None
if auth_token:
self._auth_token = auth_token
self._auth_token_input = True
self._headers['X-AUTH-TOKEN'] = self._auth_token
# user information for quantum
if self._user_info:
if 'user_id' in self._user_info:
self._headers['X-API-USER-ID'] = self._user_info['user_id']
if 'user' in self._user_info:
self._headers['X-API-USER'] = self._user_info['user']
if 'role' in self._user_info:
self._headers['X-API-ROLE'] = self._user_info['role']
#self._http = HTTPClient(self._web_host, self._web_port,
# network_timeout = 300)
self._create_api_server_session()
retry_count = 6
while retry_count:
try:
homepage = self._request(rest.OP_GET, self._base_url,
retry_on_error=False)
self._cfg_root_url = self._parse_homepage(homepage)
except ServiceUnavailableError as e:
logger = logging.getLogger(__name__)
logger.warn("Exception: %s", str(e))
if wait_for_connect:
# Retry connect infinitely when http retcode 503
continue
elif retry_count:
# Retry connect 60 times when http retcode 503
retry_count -= 1
time.sleep(1)
else:
# connected succesfully
break
#end __init__
def _obj_serializer_diff(self, obj):
if hasattr(obj, 'serialize_to_json'):
return obj.serialize_to_json(obj.get_pending_updates())
else:
return dict((k, v) for k, v in obj.__dict__.iteritems())
#end _obj_serializer_diff
def _obj_serializer_all(self, obj):
if hasattr(obj, 'serialize_to_json'):
return obj.serialize_to_json()
else:
return dict((k, v) for k, v in obj.__dict__.iteritems())
#end _obj_serializer_all
def _create_api_server_session(self):
self._api_server_session = requests.Session()
adapter = requests.adapters.HTTPAdapter(pool_connections=100,
pool_maxsize=100)
self._api_server_session.mount("http://", adapter)
self._api_server_session.mount("https://", adapter)
#end _create_api_server_session
# Authenticate with configured service
def _authenticate(self, response=None, headers=None):
if self._authn_type is None:
return headers
url = "%s://%s:%s%s" % (self._authn_protocol, self._authn_server, self._authn_port,
self._authn_url)
try:
response = requests.post(url, data=self._authn_body,
headers=self._DEFAULT_AUTHN_HEADERS)
except Exception as e:
raise RuntimeError('Unable to connect to keystone for authentication. Verify keystone server details')
if response.status_code == 200:
# plan is to re-issue original request with new token
new_headers = headers or {}
authn_content = json.loads(response.text)
self._auth_token = authn_content['access']['token']['id']
new_headers['X-AUTH-TOKEN'] = self._auth_token
return new_headers
else:
raise RuntimeError('Authentication Failure')
#end _authenticate
def _http_get(self, uri, headers=None, query_params=None):
url = "http://%s:%s%s" \
% (self._web_host, self._web_port, uri)
response = self._api_server_session.get(url, headers=headers,
params=query_params)
#print 'Sending Request URL: ' + pformat(url)
#print ' Headers: ' + pformat(headers)
#print ' QParams: ' + pformat(query_params)
#response = self._api_server_session.get(url, headers = headers,
# params = query_params)
#print 'Received Response: ' + pformat(response.text)
return (response.status_code, response.text)
#end _http_get
def _http_post(self, uri, body, headers):
url = "http://%s:%s%s" \
% (self._web_host, self._web_port, uri)
response = self._api_server_session.post(url, data=body,
headers=headers)
return (response.status_code, response.text)
#end _http_post
def _http_delete(self, uri, body, headers):
url = "http://%s:%s%s" \
% (self._web_host, self._web_port, uri)
response = self._api_server_session.delete(url, data=body,
headers=headers)
return (response.status_code, response.text)
#end _http_delete
def _http_put(self, uri, body, headers):
url = "http://%s:%s%s" \
% (self._web_host, self._web_port, uri)
response = self._api_server_session.put(url, data=body,
headers=headers)
return (response.status_code, response.text)
#end _http_delete
def _parse_homepage(self, json_body):
py_obj = json.loads(json_body)
srv_root_url = py_obj['href']
self._srv_root_url = srv_root_url
for link in py_obj['links']:
# strip base from *_url to get *_uri
uri = link['link']['href'].replace(srv_root_url, '')
if link['link']['rel'] == 'collection':
class_name = "%s" % (utils.CamelCase(link['link']['name']))
cls = str_to_class(class_name)
if not cls:
continue
cls.create_uri = uri
elif link['link']['rel'] == 'resource-base':
class_name = "%s" % (utils.CamelCase(link['link']['name']))
cls = str_to_class(class_name)
if not cls:
continue
resource_type = link['link']['name']
cls.resource_uri_base[resource_type] = uri
elif link['link']['rel'] == 'action':
act_type = link['link']['name']
self._action_uri[act_type] = uri
#end _parse_homepage
def _find_url(self, json_body, resource_name):
rname = unicode(resource_name)
py_obj = json.loads(json_body)
pprint.pprint(py_obj)
for link in py_obj['links']:
if link['link']['name'] == rname:
return link['link']['href']
return None
#end _find_url
def _read_args_to_id(self, obj_type, fq_name=None, fq_name_str=None,
id=None, ifmap_id=None):
arg_count = ((fq_name is not None) + (fq_name_str is not None) +
(id is not None) + (ifmap_id is not None))
if (arg_count == 0):
return (False, "at least one of the arguments has to be provided")
elif (arg_count > 1):
return (False, "only one of the arguments should be provided")
if id:
return (True, id)
if fq_name:
return (True, self.fq_name_to_id(obj_type, fq_name))
if fq_name_str:
return (True, self.fq_name_to_id(obj_type, fq_name_str.split(':')))
if ifmap_id:
return (True, self.ifmap_to_id(ifmap_id))
#end _read_args_to_id
def _request_server(self, op, url, data=None, retry_on_error=True,
retry_after_authn=False, retry_count=30):
if not hasattr(self, '_cfg_root_url'):
homepage = self._request(rest.OP_GET, self._base_url,
retry_on_error=False)
self._cfg_root_url = self._parse_homepage(homepage)
return self._request(op, url, data=data, retry_on_error=retry_on_error,
retry_after_authn=retry_after_authn,
retry_count=retry_count)
def _request(self, op, url, data=None, retry_on_error=True,
retry_after_authn=False, retry_count=30):
retried = 0
while True:
try:
if (op == rest.OP_GET):
(status, content) = self._http_get(url, headers=self._headers,
query_params=data)
elif (op == rest.OP_POST):
(status, content) = self._http_post(url, body=data,
headers=self._headers)
elif (op == rest.OP_DELETE):
(status, content) = self._http_delete(url, body=data,
headers=self._headers)
elif (op == rest.OP_PUT):
(status, content) = self._http_put(url, body=data,
headers=self._headers)
else:
raise ValueError
except ConnectionError:
if not retry_on_error:
raise ConnectionError
time.sleep(1)
self._create_api_server_session()
continue
if status == 200:
return content
# Exception Response, see if it can be resolved
if ((status == 401) and (not self._auth_token_input) and (not retry_after_authn)):
self._headers = self._authenticate(content, self._headers)
# Recursive call after authentication (max 1 level)
content = self._request(op, url, data=data, retry_after_authn=True)
return content
elif status == 404:
raise NoIdError('Error: oper %s url %s body %s response %s'
% (op, url, data, content))
elif status == 403:
raise PermissionDenied(content)
elif status == 409:
raise RefsExistError(content)
elif status == 504:
# Request sent to API server, but no response came within 50s
raise TimeOutError('Gateway Timeout 504')
elif status in [502, 503]:
# 502: API server died after accepting request, so retry
# 503: no API server available even before sending the request
retried += 1
if retried >= retry_count:
raise ServiceUnavailableError('Service Unavailable Timeout %d' % status)
time.sleep(1)
continue
elif status == 400:
raise BadRequest(status, content)
else: # Unknown Error
raise HttpError(status, content)
# end while True
#end _request_server
def ref_update(self, obj_type, obj_uuid, ref_type, ref_uuid, ref_fq_name, operation, attr=None):
if ref_type.endswith('_refs'):
ref_type = ref_type[:-5].replace('_', '-')
json_body = json.dumps({'type': obj_type, 'uuid': obj_uuid,
'ref-type': ref_type, 'ref-uuid': ref_uuid,
'ref-fq-name': ref_fq_name,
'operation': operation, 'attr': attr},
default=self._obj_serializer_diff)
uri = self._action_uri['ref-update']
try:
content = self._request_server(rest.OP_POST, uri, data=json_body)
except HttpError as he:
if he.status_code == 404:
return None
raise he
return json.loads(content)['uuid']
#end ref_update
def obj_to_id(self, obj):
return self.fq_name_to_id(obj.get_type(), obj.get_fq_name())
#end obj_to_id
def fq_name_to_id(self, obj_type, fq_name):
json_body = json.dumps({'type': obj_type, 'fq_name': fq_name})
uri = self._action_uri['name-to-id']
try:
content = self._request_server(rest.OP_POST, uri, data=json_body)
except HttpError as he:
if he.status_code == 404:
return None
raise he
return json.loads(content)['uuid']
#end fq_name_to_id
def id_to_fq_name(self, id):
json_body = json.dumps({'uuid': id})
uri = self._action_uri['id-to-name']
content = self._request_server(rest.OP_POST, uri, data=json_body)
return json.loads(content)['fq_name']
#end id_to_fq_name
def id_to_fq_name_type(self, id):
json_body = json.dumps({'uuid': id})
uri = self._action_uri['id-to-name']
content = self._request_server(rest.OP_POST, uri, data=json_body)
json_rsp = json.loads(content)
return (json_rsp['fq_name'], json_rsp['type'])
# This is required only for helping ifmap-subscribers using rest publish
def ifmap_to_id(self, ifmap_id):
json_body = json.dumps({'ifmap_id': ifmap_id})
uri = self._action_uri['ifmap-to-id']
try:
content = self._request_server(rest.OP_POST, uri, data=json_body)
except HttpError as he:
if he.status_code == 404:
return None
return json.loads(content)['uuid']
#end ifmap_to_id
def obj_to_json(self, obj):
return json.dumps(obj, default=self._obj_serializer_all)
# end obj_to_json
def obj_to_dict(self, obj):
return json.loads(self.obj_to_json(obj))
# end obj_to_dict
def fetch_records(self):
json_body = json.dumps({'fetch_records': None})
uri = self._action_uri['fetch-records']
content = self._request_server(rest.OP_POST, uri, data=json_body)
return json.loads(content)['results']
#end fetch_records
def restore_config(self, create, resource, json_body):
class_name = "%s" % (utils.CamelCase(resource))
cls = str_to_class(class_name)
if not cls:
return None
if create:
uri = cls.create_uri
content = self._request_server(rest.OP_POST, uri, data=json_body)
else:
obj_dict = json.loads(json_body)
uri = cls.resource_uri_base[resource] + '/'
uri += obj_dict[resource]['uuid']
content = self._request_server(rest.OP_PUT, uri, data=json_body)
return json.loads(content)
#end restore_config
def kv_store(self, key, value):
# TODO move oper value to common
json_body = json.dumps({'operation': 'STORE',
'key': key,
'value': value})
uri = self._action_uri['useragent-keyvalue']
self._request_server(rest.OP_POST, uri, data=json_body)
#end kv_store
def kv_retrieve(self, key=None):
# if key is None, entire collection is retrieved, use with caution!
# TODO move oper value to common
json_body = json.dumps({'operation': 'RETRIEVE',
'key': key})
uri = self._action_uri['useragent-keyvalue']
content = self._request_server(rest.OP_POST, uri, data=json_body)
return json.loads(content)['value']
#end kv_retrieve
def kv_delete(self, key):
# TODO move oper value to common
json_body = json.dumps({'operation': 'DELETE',
'key': key})
uri = self._action_uri['useragent-keyvalue']
self._request_server(rest.OP_POST, uri, data=json_body)
#end kv_delete
# reserve block of IP address from a VN
# expected format {"subnet" : "2.1.1.0/24", "count" : 4}
def virtual_network_ip_alloc(self, vnobj, count=1, subnet=None):
json_body = json.dumps({'count': count, 'subnet': subnet})
uri = self._action_uri['virtual-network-ip-alloc'] % vnobj.uuid
content = self._request_server(rest.OP_POST, uri, data=json_body)
return json.loads(content)['ip_addr']
#end virtual_network_ip_alloc
# free previously reserved block of IP address from a VN
# Expected format "subnet" : "2.1.1.0/24",
# "ip_addr" : ["2.1.1.239", "2.1.1.238"]
def virtual_network_ip_free(self, vnobj, ip_list, subnet=None):
json_body = json.dumps({'ip_addr': ip_list, 'subnet': subnet})
uri = self._action_uri['virtual-network-ip-free'] % vnobj.uuid
rv = self._request_server(rest.OP_POST, uri, data=json_body)
return rv
#end virtual_network_ip_free
# return no of ip instances from a given VN/Subnet
# Expected format "subne_list" : ["2.1.1.0/24", "2.2.2.0/24"]
def virtual_network_subnet_ip_count(self, vnobj, subnet_list):
json_body = json.dumps({'subnet_list': subnet_list})
uri = self._action_uri['virtual-network-subnet-ip-count'] % vnobj.uuid
rv = self._request_server(rest.OP_POST, uri, data=json_body)
return rv
#end virtual_network_subnet_ip_count
def get_auth_token(self):
if self._auth_token:
return self._auth_token
self._headers = self._authenticate(headers=self._headers)
return self._auth_token
#end get_auth_token
def resource_list(self, obj_type, parent_id=None, parent_fq_name=None,
back_ref_id=None, obj_uuids=None, fields=None,
detail=False, count=False, filters=None):
if not obj_type:
raise ResourceTypeUnknownError(obj_type)
class_name = "%s" % (utils.CamelCase(obj_type))
obj_class = str_to_class(class_name)
if not obj_class:
raise ResourceTypeUnknownError(obj_type)
query_params = {}
do_post_for_list = False
if parent_fq_name:
parent_fq_name_str = ':'.join(parent_fq_name)
query_params['parent_fq_name_str'] = parent_fq_name_str
elif parent_id:
if isinstance(parent_id, list):
query_params['parent_id'] = ','.join(parent_id)
if len(parent_id) > self.POST_FOR_LIST_THRESHOLD:
do_post_for_list = True
else:
query_params['parent_id'] = parent_id
if back_ref_id:
if isinstance(back_ref_id, list):
query_params['back_ref_id'] = ','.join(back_ref_id)
if len(back_ref_id) > self.POST_FOR_LIST_THRESHOLD:
do_post_for_list = True
else:
query_params['back_ref_id'] = back_ref_id
if obj_uuids:
comma_sep_obj_uuids = ','.join(u for u in obj_uuids)
query_params['obj_uuids'] = comma_sep_obj_uuids
if len(obj_uuids) > self.POST_FOR_LIST_THRESHOLD:
do_post_for_list = True
if fields:
comma_sep_fields = ','.join(f for f in fields)
query_params['fields'] = comma_sep_fields
query_params['detail'] = detail
query_params['count'] = count
if filters:
query_params['filters'] = ','.join(
'%s==%s' %(k,json.dumps(v)) for k,v in filters.items())
if do_post_for_list:
uri = self._action_uri.get('list-bulk-collection')
if not uri:
raise
# use same keys as in GET with additional 'type'
query_params['type'] = obj_type
json_body = json.dumps(query_params)
content = self._request_server(rest.OP_POST,
uri, json_body)
else: # GET /<collection>
try:
content = self._request_server(rest.OP_GET,
obj_class.create_uri,
data = query_params)
except NoIdError:
# dont allow NoIdError propagate to user
return []
if not detail:
return json.loads(content)
resource_dicts = json.loads(content)['%ss' %(obj_type)]
resource_objs = []
for resource_dict in resource_dicts:
obj_dict = resource_dict['%s' %(obj_type)]
resource_obj = obj_class.from_dict(**obj_dict)
resource_obj.clear_pending_updates()
resource_obj.set_server_conn(self)
resource_objs.append(resource_obj)
return resource_objs
#end resource_list
#end class VncApi
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