osm_lcm/ng_ro.py

   1 #!/usr/bin/env python3
   2 # -*- coding: utf-8 -*-
   3
   4 ##
   5 # Copyright 2020 Telefónica Investigación y Desarrollo, S.A.U.
   6 #
   7 # Licensed under the Apache License, Version 2.0 (the "License"); you may
   8 # not use this file except in compliance with the License. You may obtain
   9 # a copy of the License at
  10 #
  11 #         http://www.apache.org/licenses/LICENSE-2.0
  12 #
  13 # Unless required by applicable law or agreed to in writing, software
  14 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  15 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  16 # License for the specific language governing permissions and limitations
  17 # under the License.
  18 #
  19 ##
  20
  21 """
  22 asyncio RO python client to interact with New Generation RO server
  23 """
  24
  25 import asyncio
  26 import aiohttp
  27 import yaml
  28 import logging
  29
  30 __author__ = "Alfonso Tierno <alfonso.tiernosepulveda@telefonica.com"
  31 __date__ = "$09-Jan-2018 09:09:48$"
  32 __version__ = "0.1.2"
  33 version_date = "2020-05-08"
  34
  35
  36 class NgRoException(Exception):
  37     def __init__(self, message, http_code=400):
  38         """Common Exception for all RO client exceptions"""
  39         self.http_code = http_code
  40         Exception.__init__(self, message)
  41
  42
  43 class NgRoClient:
  44     headers_req = {"Accept": "application/yaml", "content-type": "application/yaml"}
  45     client_to_RO = {
  46         "tenant": "tenants",
  47         "vim": "datacenters",
  48         "vim_account": "datacenters",
  49         "sdn": "sdn_controllers",
  50         "vnfd": "vnfs",
  51         "nsd": "scenarios",
  52         "wim": "wims",
  53         "wim_account": "wims",
  54         "ns": "instances",
  55     }
  56     mandatory_for_create = {
  57         "tenant": ("name",),
  58         "vnfd": ("name", "id"),
  59         "nsd": ("name", "id"),
  60         "ns": ("name", "scenario", "datacenter"),
  61         "vim": ("name", "vim_url"),
  62         "wim": ("name", "wim_url"),
  63         "vim_account": (),
  64         "wim_account": (),
  65         "sdn": ("name", "type"),
  66     }
  67     timeout_large = 120
  68     timeout_short = 30
  69
  70     def __init__(self, loop, uri, **kwargs):
  71         self.loop = loop
  72         self.endpoint_url = uri
  73         if not self.endpoint_url.endswith("/"):
  74             self.endpoint_url += "/"
  75         if not self.endpoint_url.startswith("http"):
  76             self.endpoint_url = "http://" + self.endpoint_url
  77
  78         self.username = kwargs.get("username")
  79         self.password = kwargs.get("password")
  80         self.tenant_id_name = kwargs.get("tenant")
  81         self.tenant = None
  82         self.datacenter_id_name = kwargs.get("datacenter")
  83         self.datacenter = None
  84         logger_name = kwargs.get("logger_name", "lcm.ro")
  85         self.logger = logging.getLogger(logger_name)
  86         if kwargs.get("loglevel"):
  87             self.logger.setLevel(kwargs["loglevel"])
  88
  89     async def deploy(self, nsr_id, target):
  90         """
  91         Performs an action over an item
  92         :param item: can be 'tenant', 'vnfd', 'nsd', 'ns', 'vim', 'vim_account', 'sdn'
  93         :param item_id_name: RO id or name of the item. Raise and exception if more than one found
  94         :param descriptor: can be a dict, or a yaml/json text. Autodetect unless descriptor_format is provided
  95         :param descriptor_format: Can be 'json' or 'yaml'
  96         :param kwargs: Overrides descriptor with values as name, description, vim_url, vim_url_admin, vim_type
  97                keys can be a dot separated list to specify elements inside dict
  98         :return: dictionary with the information or raises NgRoException on Error
  99         """
 100         try:
 101             if isinstance(target, str):
 102                 target = self._parse_yaml(target)
 103             payload_req = yaml.safe_dump(target)
 104
 105             url = "{}/ns/v1/deploy/{nsr_id}".format(self.endpoint_url, nsr_id=nsr_id)
 106             async with aiohttp.ClientSession(loop=self.loop) as session:
 107                 self.logger.debug("NG-RO POST %s %s", url, payload_req)
 108                 # timeout = aiohttp.ClientTimeout(total=self.timeout_large)
 109                 async with session.post(
 110                     url, headers=self.headers_req, data=payload_req
 111                 ) as response:
 112                     response_text = await response.read()
 113                     self.logger.debug(
 114                         "POST {} [{}] {}".format(
 115                             url, response.status, response_text[:100]
 116                         )
 117                     )
 118                     if response.status >= 300:
 119                         raise NgRoException(response_text, http_code=response.status)
 120                     return self._parse_yaml(response_text, response=True)
 121         except (aiohttp.ClientOSError, aiohttp.ClientError) as e:
 122             raise NgRoException(e, http_code=504)
 123         except asyncio.TimeoutError:
 124             raise NgRoException("Timeout", http_code=504)
 125
 126     async def status(self, nsr_id, action_id):
 127         try:
 128             url = "{}/ns/v1/deploy/{nsr_id}/{action_id}".format(
 129                 self.endpoint_url, nsr_id=nsr_id, action_id=action_id
 130             )
 131             async with aiohttp.ClientSession(loop=self.loop) as session:
 132                 self.logger.debug("GET %s", url)
 133                 # timeout = aiohttp.ClientTimeout(total=self.timeout_short)
 134                 async with session.get(url, headers=self.headers_req) as response:
 135                     response_text = await response.read()
 136                     self.logger.debug(
 137                         "GET {} [{}] {}".format(
 138                             url, response.status, response_text[:100]
 139                         )
 140                     )
 141                     if response.status >= 300:
 142                         raise NgRoException(response_text, http_code=response.status)
 143                     return self._parse_yaml(response_text, response=True)
 144
 145         except (aiohttp.ClientOSError, aiohttp.ClientError) as e:
 146             raise NgRoException(e, http_code=504)
 147         except asyncio.TimeoutError:
 148             raise NgRoException("Timeout", http_code=504)
 149
 150     async def delete(self, nsr_id):
 151         try:
 152             url = "{}/ns/v1/deploy/{nsr_id}".format(self.endpoint_url, nsr_id=nsr_id)
 153             async with aiohttp.ClientSession(loop=self.loop) as session:
 154                 self.logger.debug("DELETE %s", url)
 155                 # timeout = aiohttp.ClientTimeout(total=self.timeout_short)
 156                 async with session.delete(url, headers=self.headers_req) as response:
 157                     self.logger.debug("DELETE {} [{}]".format(url, response.status))
 158                     if response.status >= 300:
 159                         raise NgRoException(
 160                             "Delete {}".format(nsr_id), http_code=response.status
 161                         )
 162                     return
 163
 164         except (aiohttp.ClientOSError, aiohttp.ClientError) as e:
 165             raise NgRoException(e, http_code=504)
 166         except asyncio.TimeoutError:
 167             raise NgRoException("Timeout", http_code=504)
 168
 169     async def get_version(self):
 170         """
 171         Obtain RO server version.
 172         :return: a list with integers ["major", "minor", "release"]. Raises NgRoException on Error,
 173         """
 174         try:
 175             response_text = ""
 176             async with aiohttp.ClientSession(loop=self.loop) as session:
 177                 url = "{}/version".format(self.endpoint_url)
 178                 self.logger.debug("RO GET %s", url)
 179                 # timeout = aiohttp.ClientTimeout(total=self.timeout_short)
 180                 async with session.get(url, headers=self.headers_req) as response:
 181                     response_text = await response.read()
 182                     self.logger.debug(
 183                         "GET {} [{}] {}".format(
 184                             url, response.status, response_text[:100]
 185                         )
 186                     )
 187                     if response.status >= 300:
 188                         raise NgRoException(response_text, http_code=response.status)
 189
 190                 for word in str(response_text).split(" "):
 191                     if "." in word:
 192                         version_text, _, _ = word.partition("-")
 193                         return version_text
 194                 raise NgRoException(
 195                     "Got invalid version text: '{}'".format(response_text),
 196                     http_code=500,
 197                 )
 198         except (aiohttp.ClientOSError, aiohttp.ClientError) as e:
 199             raise NgRoException(e, http_code=504)
 200         except asyncio.TimeoutError:
 201             raise NgRoException("Timeout", http_code=504)
 202         except Exception as e:
 203             raise NgRoException(
 204                 "Got invalid version text: '{}'; causing exception {}".format(
 205                     response_text, e
 206                 ),
 207                 http_code=500,
 208             )
 209
 210     @staticmethod
 211     def _parse_yaml(descriptor, response=False):
 212         try:
 213             return yaml.safe_load(descriptor)
 214         except yaml.YAMLError as exc:
 215             error_pos = ""
 216             if hasattr(exc, "problem_mark"):
 217                 mark = exc.problem_mark
 218                 error_pos = " at line:{} column:{}s".format(
 219                     mark.line + 1, mark.column + 1
 220                 )
 221             error_text = "yaml format error" + error_pos
 222             if response:
 223                 raise NgRoException("reponse with " + error_text)
 224             raise NgRoException(error_text)