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## |
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# Copyright 2019 Telefonica Investigacion y Desarrollo, S.A.U. |
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# This file is part of OSM |
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# All Rights Reserved. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
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# implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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# |
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# For those usages not covered by the Apache License, Version 2.0 please |
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# contact with: nfvlabs@tid.es |
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## |
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|
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import abc |
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import asyncio |
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from http import HTTPStatus |
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from shlex import quote |
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import os |
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import shlex |
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import subprocess |
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import time |
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|
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from n2vc.exceptions import N2VCBadArgumentsException |
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from osm_common.dbmongo import DbException |
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import yaml |
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|
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from n2vc.loggable import Loggable |
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from n2vc.utils import JujuStatusToOSM, N2VCDeploymentStatus |
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class N2VCConnector(abc.ABC, Loggable): |
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"""Generic N2VC connector |
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Abstract class |
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""" |
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|
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""" |
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#################################################################################### |
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################################### P U B L I C #################################### |
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#################################################################################### |
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""" |
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def __init__( |
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self, |
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db: object, |
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fs: object, |
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log: object, |
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on_update_db=None, |
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**kwargs, |
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): |
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"""Initialize N2VC abstract connector. It defines de API for VCA connectors |
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:param object db: Mongo object managing the MongoDB (repo common DbBase) |
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:param object fs: FileSystem object managing the package artifacts (repo common |
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FsBase) |
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:param object log: the logging object to log to |
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:param on_update_db: callback called when n2vc connector updates database. |
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Received arguments: |
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table: e.g. "nsrs" |
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filter: e.g. {_id: <nsd-id> } |
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path: e.g. "_admin.deployed.VCA.3." |
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updated_data: e.g. , "{ _admin.deployed.VCA.3.status: 'xxx', etc }" |
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""" |
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|
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# parent class |
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Loggable.__init__(self, log=log, log_to_console=True, prefix="\nN2VC") |
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|
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# check arguments |
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if db is None: |
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raise N2VCBadArgumentsException("Argument db is mandatory", ["db"]) |
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if fs is None: |
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raise N2VCBadArgumentsException("Argument fs is mandatory", ["fs"]) |
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|
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# store arguments into self |
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self.db = db |
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self.fs = fs |
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self.on_update_db = on_update_db |
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# generate private/public key-pair |
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self.private_key_path = None |
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self.public_key_path = None |
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@abc.abstractmethod |
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async def get_status(self, namespace: str, yaml_format: bool = True): |
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"""Get namespace status |
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:param namespace: we obtain ns from namespace |
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:param yaml_format: returns a yaml string |
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""" |
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# TODO: review which public key |
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def get_public_key(self) -> str: |
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"""Get the VCA ssh-public-key |
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Returns the SSH public key from local mahine, to be injected into virtual |
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machines to be managed by the VCA. |
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First run, a ssh keypair will be created. |
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The public key is injected into a VM so that we can provision the |
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machine with Juju, after which Juju will communicate with the VM |
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directly via the juju agent. |
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""" |
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# Find the path where we expect our key lives (~/.ssh) |
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homedir = os.environ.get("HOME") |
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if not homedir: |
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self.log.warning("No HOME environment variable, using /tmp") |
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homedir = "/tmp" |
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sshdir = "{}/.ssh".format(homedir) |
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sshdir = os.path.realpath(os.path.normpath(os.path.abspath(sshdir))) |
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if not os.path.exists(sshdir): |
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os.mkdir(sshdir) |
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|
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self.private_key_path = "{}/id_n2vc_rsa".format(sshdir) |
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self.private_key_path = os.path.realpath( |
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os.path.normpath(os.path.abspath(self.private_key_path)) |
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) |
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self.public_key_path = "{}.pub".format(self.private_key_path) |
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self.public_key_path = os.path.realpath( |
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os.path.normpath(os.path.abspath(self.public_key_path)) |
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) |
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# If we don't have a key generated, then we have to generate it using ssh-keygen |
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if not os.path.exists(self.private_key_path): |
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command = "ssh-keygen -t {} -b {} -N '' -f {}".format( |
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"rsa", "4096", quote(self.private_key_path) |
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) |
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# run command with arguments |
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args = shlex.split(command) |
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subprocess.run(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE) |
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# Read the public key. Only one public key (one line) in the file |
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with open(self.public_key_path, "r") as file: |
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public_key = file.readline() |
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|
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return public_key |
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@abc.abstractmethod |
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async def create_execution_environment( |
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self, |
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namespace: str, |
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db_dict: dict, |
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reuse_ee_id: str = None, |
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progress_timeout: float = None, |
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total_timeout: float = None, |
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) -> tuple[str, dict]: |
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"""Create an Execution Environment. Returns when it is created or raises an |
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exception on failing |
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:param str namespace: Contains a dot separate string. |
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LCM will use: [<nsi-id>].<ns-id>.<vnf-id>.<vdu-id>[-<count>] |
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:param dict db_dict: where to write to database when the status changes. |
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It contains a dictionary with {collection: str, filter: {}, path: str}, |
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e.g. {collection: "nsrs", filter: {_id: <nsd-id>, path: |
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"_admin.deployed.VCA.3"} |
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:param str reuse_ee_id: ee id from an older execution. It allows us to reuse an |
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older environment |
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:param float progress_timeout: |
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:param float total_timeout: |
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:returns str, dict: id of the new execution environment and credentials for it |
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(credentials can contains hostname, username, etc depending on |
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underlying cloud) |
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""" |
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|
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@abc.abstractmethod |
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async def register_execution_environment( |
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self, |
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namespace: str, |
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credentials: dict, |
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db_dict: dict, |
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progress_timeout: float = None, |
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total_timeout: float = None, |
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) -> str: |
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""" |
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Register an existing execution environment at the VCA |
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|
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:param str namespace: same as create_execution_environment method |
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:param dict credentials: credentials to access the existing execution |
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environment |
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(it can contains hostname, username, path to private key, etc depending on |
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underlying cloud) |
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:param dict db_dict: where to write to database when the status changes. |
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It contains a dictionary with {collection: str, filter: {}, path: str}, |
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e.g. {collection: "nsrs", filter: |
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{_id: <nsd-id>, path: "_admin.deployed.VCA.3"} |
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:param float progress_timeout: |
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:param float total_timeout: |
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:returns str: id of the execution environment |
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""" |
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|
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@abc.abstractmethod |
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async def install_configuration_sw( |
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self, |
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ee_id: str, |
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artifact_path: str, |
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db_dict: dict, |
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progress_timeout: float = None, |
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total_timeout: float = None, |
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): |
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""" |
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Install the software inside the execution environment identified by ee_id |
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:param str ee_id: the id of the execution environment returned by |
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create_execution_environment or register_execution_environment |
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:param str artifact_path: where to locate the artifacts (parent folder) using |
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the self.fs |
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the final artifact path will be a combination of this artifact_path and |
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additional string from the config_dict (e.g. charm name) |
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:param dict db_dict: where to write into database when the status changes. |
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It contains a dict with |
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{collection: <str>, filter: {}, path: <str>}, |
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e.g. {collection: "nsrs", filter: |
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{_id: <nsd-id>, path: "_admin.deployed.VCA.3"} |
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:param float progress_timeout: |
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:param float total_timeout: |
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""" |
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@abc.abstractmethod |
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async def install_k8s_proxy_charm( |
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self, |
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charm_name: str, |
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namespace: str, |
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artifact_path: str, |
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db_dict: dict, |
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progress_timeout: float = None, |
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total_timeout: float = None, |
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config: dict = None, |
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) -> str: |
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""" |
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Install a k8s proxy charm |
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|
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:param charm_name: Name of the charm being deployed |
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:param namespace: collection of all the uuids related to the charm. |
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:param str artifact_path: where to locate the artifacts (parent folder) using |
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the self.fs |
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the final artifact path will be a combination of this artifact_path and |
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additional string from the config_dict (e.g. charm name) |
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:param dict db_dict: where to write into database when the status changes. |
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It contains a dict with |
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{collection: <str>, filter: {}, path: <str>}, |
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e.g. {collection: "nsrs", filter: |
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{_id: <nsd-id>, path: "_admin.deployed.VCA.3"} |
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:param float progress_timeout: |
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:param float total_timeout: |
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:param config: Dictionary with additional configuration |
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|
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:returns ee_id: execution environment id. |
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""" |
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|
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@abc.abstractmethod |
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async def get_ee_ssh_public__key( |
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self, |
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ee_id: str, |
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db_dict: dict, |
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progress_timeout: float = None, |
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total_timeout: float = None, |
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) -> str: |
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""" |
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Generate a priv/pub key pair in the execution environment and return the public |
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key |
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|
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:param str ee_id: the id of the execution environment returned by |
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create_execution_environment or register_execution_environment |
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:param dict db_dict: where to write into database when the status changes. |
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It contains a dict with |
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{collection: <str>, filter: {}, path: <str>}, |
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e.g. {collection: "nsrs", filter: |
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{_id: <nsd-id>, path: "_admin.deployed.VCA.3"} |
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:param float progress_timeout: |
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:param float total_timeout: |
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:returns: public key of the execution environment |
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For the case of juju proxy charm ssh-layered, it is the one |
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returned by 'get-ssh-public-key' primitive. |
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It raises a N2VC exception if fails |
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""" |
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|
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@abc.abstractmethod |
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async def add_relation( |
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self, ee_id_1: str, ee_id_2: str, endpoint_1: str, endpoint_2: str |
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): |
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""" |
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Add a relation between two Execution Environments (using their associated |
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endpoints). |
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|
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:param str ee_id_1: The id of the first execution environment |
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:param str ee_id_2: The id of the second execution environment |
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:param str endpoint_1: The endpoint in the first execution environment |
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:param str endpoint_2: The endpoint in the second execution environment |
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""" |
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|
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# TODO |
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@abc.abstractmethod |
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1 |
async def remove_relation(self): |
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""" """ |
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|
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# TODO |
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@abc.abstractmethod |
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async def deregister_execution_environments(self): |
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""" """ |
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|
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@abc.abstractmethod |
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1 |
async def delete_namespace( |
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self, namespace: str, db_dict: dict = None, total_timeout: float = None |
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): |
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""" |
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Remove a network scenario and its execution environments |
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:param namespace: [<nsi-id>].<ns-id> |
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:param dict db_dict: where to write into database when the status changes. |
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It contains a dict with |
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{collection: <str>, filter: {}, path: <str>}, |
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e.g. {collection: "nsrs", filter: |
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{_id: <nsd-id>, path: "_admin.deployed.VCA.3"} |
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:param float total_timeout: |
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""" |
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|
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@abc.abstractmethod |
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1 |
async def delete_execution_environment( |
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self, ee_id: str, db_dict: dict = None, total_timeout: float = None |
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): |
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""" |
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Delete an execution environment |
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:param str ee_id: id of the execution environment to delete |
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:param dict db_dict: where to write into database when the status changes. |
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It contains a dict with |
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{collection: <str>, filter: {}, path: <str>}, |
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e.g. {collection: "nsrs", filter: |
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{_id: <nsd-id>, path: "_admin.deployed.VCA.3"} |
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:param float total_timeout: |
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""" |
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|
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1 |
@abc.abstractmethod |
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1 |
async def upgrade_charm( |
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self, |
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ee_id: str = None, |
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path: str = None, |
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charm_id: str = None, |
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charm_type: str = None, |
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timeout: float = None, |
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) -> str: |
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"""This method upgrade charms in VNFs |
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|
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Args: |
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ee_id: Execution environment id |
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path: Local path to the charm |
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charm_id: charm-id |
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charm_type: Charm type can be lxc-proxy-charm, native-charm or k8s-proxy-charm |
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timeout: (Float) Timeout for the ns update operation |
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|
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Returns: |
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The output of the update operation if status equals to "completed" |
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""" |
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|
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1 |
@abc.abstractmethod |
| 363 |
1 |
async def exec_primitive( |
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self, |
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ee_id: str, |
| 366 |
|
primitive_name: str, |
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params_dict: dict, |
| 368 |
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db_dict: dict = None, |
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progress_timeout: float = None, |
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total_timeout: float = None, |
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) -> str: |
| 372 |
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""" |
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Execute a primitive in the execution environment |
| 374 |
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|
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:param str ee_id: the one returned by create_execution_environment or |
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register_execution_environment |
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:param str primitive_name: must be one defined in the software. There is one |
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called 'config', where, for the proxy case, the 'credentials' of VM are |
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provided |
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|
:param dict params_dict: parameters of the action |
| 381 |
|
:param dict db_dict: where to write into database when the status changes. |
| 382 |
|
It contains a dict with |
| 383 |
|
{collection: <str>, filter: {}, path: <str>}, |
| 384 |
|
e.g. {collection: "nsrs", filter: |
| 385 |
|
{_id: <nsd-id>, path: "_admin.deployed.VCA.3"} |
| 386 |
|
:param float progress_timeout: |
| 387 |
|
:param float total_timeout: |
| 388 |
|
:returns str: primitive result, if ok. It raises exceptions in case of fail |
| 389 |
|
""" |
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|
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1 |
async def disconnect(self): |
| 392 |
|
""" |
| 393 |
|
Disconnect from VCA |
| 394 |
|
""" |
| 395 |
|
|
| 396 |
1 |
""" |
| 397 |
|
#################################################################################### |
| 398 |
|
################################### P R I V A T E ################################## |
| 399 |
|
#################################################################################### |
| 400 |
|
""" |
| 401 |
|
|
| 402 |
1 |
def _get_namespace_components( |
| 403 |
|
self, namespace: str |
| 404 |
|
) -> tuple[str, str, str, str, str]: |
| 405 |
|
""" |
| 406 |
|
Split namespace components |
| 407 |
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|
| 408 |
|
:param namespace: [<nsi-id>].<ns-id>.<vnf-id>.<vdu-id>[-<count>] |
| 409 |
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:return: nsi_id, ns_id, vnf_id, vdu_id, vdu_count |
| 410 |
|
""" |
| 411 |
|
|
| 412 |
|
# check parameters |
| 413 |
1 |
if namespace is None or len(namespace) == 0: |
| 414 |
0 |
raise N2VCBadArgumentsException( |
| 415 |
|
"Argument namespace is mandatory", ["namespace"] |
| 416 |
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) |
| 417 |
|
|
| 418 |
|
# split namespace components |
| 419 |
1 |
parts = namespace.split(".") |
| 420 |
1 |
nsi_id = None |
| 421 |
1 |
ns_id = None |
| 422 |
1 |
vnf_id = None |
| 423 |
1 |
vdu_id = None |
| 424 |
1 |
vdu_count = None |
| 425 |
1 |
if len(parts) > 0 and len(parts[0]) > 0: |
| 426 |
0 |
nsi_id = parts[0] |
| 427 |
1 |
if len(parts) > 1 and len(parts[1]) > 0: |
| 428 |
1 |
ns_id = parts[1] |
| 429 |
1 |
if len(parts) > 2 and len(parts[2]) > 0: |
| 430 |
1 |
vnf_id = parts[2] |
| 431 |
1 |
if len(parts) > 3 and len(parts[3]) > 0: |
| 432 |
1 |
vdu_id = parts[3] |
| 433 |
1 |
vdu_parts = parts[3].split("-") |
| 434 |
1 |
if len(vdu_parts) > 1: |
| 435 |
1 |
vdu_id = vdu_parts[0] |
| 436 |
1 |
vdu_count = vdu_parts[1] |
| 437 |
|
|
| 438 |
1 |
return nsi_id, ns_id, vnf_id, vdu_id, vdu_count |
| 439 |
|
|
| 440 |
1 |
async def write_app_status_to_db( |
| 441 |
|
self, |
| 442 |
|
db_dict: dict, |
| 443 |
|
status: N2VCDeploymentStatus, |
| 444 |
|
detailed_status: str, |
| 445 |
|
vca_status: str, |
| 446 |
|
entity_type: str, |
| 447 |
|
vca_id: str = None, |
| 448 |
|
): |
| 449 |
|
""" |
| 450 |
|
Write application status to database |
| 451 |
|
|
| 452 |
|
:param: db_dict: DB dictionary |
| 453 |
|
:param: status: Status of the application |
| 454 |
|
:param: detailed_status: Detailed status |
| 455 |
|
:param: vca_status: VCA status |
| 456 |
|
:param: entity_type: Entity type ("application", "machine, and "action") |
| 457 |
|
:param: vca_id: Id of the VCA. If None, the default VCA will be used. |
| 458 |
|
""" |
| 459 |
0 |
if not db_dict: |
| 460 |
0 |
self.log.debug("No db_dict => No database write") |
| 461 |
0 |
return |
| 462 |
|
|
| 463 |
|
# self.log.debug('status={} / detailed-status={} / VCA-status={}/entity_type={}' |
| 464 |
|
# .format(str(status.value), detailed_status, vca_status, entity_type)) |
| 465 |
|
|
| 466 |
0 |
try: |
| 467 |
0 |
the_table = db_dict["collection"] |
| 468 |
0 |
the_filter = db_dict["filter"] |
| 469 |
0 |
the_path = db_dict["path"] |
| 470 |
0 |
if not the_path[-1] == ".": |
| 471 |
0 |
the_path = the_path + "." |
| 472 |
0 |
update_dict = { |
| 473 |
|
the_path + "status": str(status.value), |
| 474 |
|
the_path + "detailed-status": detailed_status, |
| 475 |
|
the_path + "VCA-status": vca_status, |
| 476 |
|
the_path + "entity-type": entity_type, |
| 477 |
|
the_path + "status-time": str(time.time()), |
| 478 |
|
} |
| 479 |
|
|
| 480 |
0 |
self.db.set_one( |
| 481 |
|
table=the_table, |
| 482 |
|
q_filter=the_filter, |
| 483 |
|
update_dict=update_dict, |
| 484 |
|
fail_on_empty=True, |
| 485 |
|
) |
| 486 |
|
|
| 487 |
|
# database callback |
| 488 |
0 |
if self.on_update_db: |
| 489 |
0 |
if asyncio.iscoroutinefunction(self.on_update_db): |
| 490 |
0 |
await self.on_update_db( |
| 491 |
|
the_table, the_filter, the_path, update_dict, vca_id=vca_id |
| 492 |
|
) |
| 493 |
|
else: |
| 494 |
0 |
self.on_update_db( |
| 495 |
|
the_table, the_filter, the_path, update_dict, vca_id=vca_id |
| 496 |
|
) |
| 497 |
|
|
| 498 |
0 |
except DbException as e: |
| 499 |
0 |
if e.http_code == HTTPStatus.NOT_FOUND: |
| 500 |
0 |
self.log.error( |
| 501 |
|
"NOT_FOUND error: Exception writing status to database: {}".format( |
| 502 |
|
e |
| 503 |
|
) |
| 504 |
|
) |
| 505 |
|
else: |
| 506 |
0 |
self.log.info("Exception writing status to database: {}".format(e)) |
| 507 |
|
|
| 508 |
1 |
def osm_status(self, entity_type: str, status: str) -> N2VCDeploymentStatus: |
| 509 |
0 |
if status not in JujuStatusToOSM[entity_type]: |
| 510 |
0 |
self.log.warning("Status {} not found in JujuStatusToOSM.".format(status)) |
| 511 |
0 |
return N2VCDeploymentStatus.UNKNOWN |
| 512 |
0 |
return JujuStatusToOSM[entity_type][status] |
| 513 |
|
|
| 514 |
|
|
| 515 |
1 |
def obj_to_yaml(obj: object) -> str: |
| 516 |
|
# dump to yaml |
| 517 |
0 |
dump_text = yaml.dump(obj, default_flow_style=False, indent=2) |
| 518 |
|
# split lines |
| 519 |
0 |
lines = dump_text.splitlines() |
| 520 |
|
# remove !!python/object tags |
| 521 |
0 |
yaml_text = "" |
| 522 |
0 |
for line in lines: |
| 523 |
0 |
index = line.find("!!python/object") |
| 524 |
0 |
if index >= 0: |
| 525 |
0 |
line = line[:index] |
| 526 |
0 |
yaml_text += line + "\n" |
| 527 |
0 |
return yaml_text |
| 528 |
|
|
| 529 |
|
|
| 530 |
1 |
def obj_to_dict(obj: object) -> dict: |
| 531 |
|
# convert obj to yaml |
| 532 |
0 |
yaml_text = obj_to_yaml(obj) |
| 533 |
|
# parse to dict |
| 534 |
0 |
return yaml.load(yaml_text, Loader=yaml.SafeLoader) |
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