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789 lines
26 KiB
Python
789 lines
26 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (c) 2016 Red Hat, Inc.
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#
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import collections
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import inspect
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import os
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import time
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from abc import ABCMeta, abstractmethod
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from datetime import datetime
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from distutils.version import LooseVersion
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try:
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from enum import Enum # enum is a ovirtsdk4 requirement
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import ovirtsdk4 as sdk
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import ovirtsdk4.version as sdk_version
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HAS_SDK = LooseVersion(sdk_version.VERSION) >= LooseVersion('4.2.4')
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except ImportError:
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HAS_SDK = False
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BYTES_MAP = {
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'kib': 2**10,
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'mib': 2**20,
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'gib': 2**30,
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'tib': 2**40,
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'pib': 2**50,
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}
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def check_sdk(module):
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if not HAS_SDK:
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module.fail_json(
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msg='ovirtsdk4 version 4.2.4 or higher is required for this module'
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)
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def get_dict_of_struct(struct, connection=None, fetch_nested=False, attributes=None):
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"""
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Convert SDK Struct type into dictionary.
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"""
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res = {}
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def remove_underscore(val):
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if val.startswith('_'):
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val = val[1:]
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remove_underscore(val)
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return val
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def convert_value(value):
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nested = False
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if isinstance(value, sdk.Struct):
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return get_dict_of_struct(value)
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elif isinstance(value, Enum) or isinstance(value, datetime):
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return str(value)
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elif isinstance(value, list) or isinstance(value, sdk.List):
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if isinstance(value, sdk.List) and fetch_nested and value.href:
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try:
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value = connection.follow_link(value)
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nested = True
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except sdk.Error:
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value = []
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ret = []
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for i in value:
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if isinstance(i, sdk.Struct):
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if not nested:
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ret.append(get_dict_of_struct(i))
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else:
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nested_obj = dict(
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(attr, convert_value(getattr(i, attr)))
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for attr in attributes if getattr(i, attr, None)
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)
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nested_obj['id'] = getattr(i, 'id', None)
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ret.append(nested_obj)
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elif isinstance(i, Enum):
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ret.append(str(i))
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else:
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ret.append(i)
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return ret
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else:
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return value
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if struct is not None:
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for key, value in struct.__dict__.items():
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if value is None:
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continue
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key = remove_underscore(key)
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res[key] = convert_value(value)
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return res
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def engine_version(connection):
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"""
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Return string representation of oVirt engine version.
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"""
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engine_api = connection.system_service().get()
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engine_version = engine_api.product_info.version
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return '%s.%s' % (engine_version.major, engine_version.minor)
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def create_connection(auth):
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"""
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Create a connection to Python SDK, from task `auth` parameter.
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If user doesnt't have SSO token the `auth` dictionary has following parameters mandatory:
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url, username, password
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If user has SSO token the `auth` dictionary has following parameters mandatory:
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url, token
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The `ca_file` parameter is mandatory in case user want to use secure connection,
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in case user want to use insecure connection, it's mandatory to send insecure=True.
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:param auth: dictionary which contains needed values for connection creation
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:return: Python SDK connection
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"""
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url = auth.get('url')
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if url is None and auth.get('hostname') is not None:
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url = 'https://{0}/ovirt-engine/api'.format(auth.get('hostname'))
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return sdk.Connection(
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url=url,
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username=auth.get('username'),
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password=auth.get('password'),
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ca_file=auth.get('ca_file', None),
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insecure=auth.get('insecure', False),
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token=auth.get('token', None),
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kerberos=auth.get('kerberos', None),
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headers=auth.get('headers', None),
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)
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def convert_to_bytes(param):
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"""
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This method convert units to bytes, which follow IEC standard.
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:param param: value to be converted
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"""
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if param is None:
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return None
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# Get rid of whitespaces:
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param = ''.join(param.split())
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# Convert to bytes:
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if param[-3].lower() in ['k', 'm', 'g', 't', 'p']:
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return int(param[:-3]) * BYTES_MAP.get(param[-3:].lower(), 1)
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elif param.isdigit():
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return int(param) * 2**10
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else:
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raise ValueError(
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"Unsupported value(IEC supported): '{value}'".format(value=param)
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)
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def follow_link(connection, link):
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"""
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This method returns the entity of the element which link points to.
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:param connection: connection to the Python SDK
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:param link: link of the entity
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:return: entity which link points to
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"""
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if link:
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return connection.follow_link(link)
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else:
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return None
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def get_link_name(connection, link):
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"""
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This method returns the name of the element which link points to.
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:param connection: connection to the Python SDK
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:param link: link of the entity
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:return: name of the entity, which link points to
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"""
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if link:
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return connection.follow_link(link).name
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else:
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return None
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def equal(param1, param2, ignore_case=False):
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"""
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Compare two parameters and return if they are equal.
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This parameter doesn't run equal operation if first parameter is None.
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With this approach we don't run equal operation in case user don't
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specify parameter in their task.
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:param param1: user inputted parameter
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:param param2: value of entity parameter
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:return: True if parameters are equal or first parameter is None, otherwise False
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"""
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if param1 is not None:
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if ignore_case:
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return param1.lower() == param2.lower()
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return param1 == param2
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return True
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def search_by_attributes(service, list_params=None, **kwargs):
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"""
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Search for the entity by attributes. Nested entities don't support search
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via REST, so in case using search for nested entity we return all entities
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and filter them by specified attributes.
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"""
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list_params = list_params or {}
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# Check if 'list' method support search(look for search parameter):
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if 'search' in inspect.getargspec(service.list)[0]:
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res = service.list(
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search=' and '.join('{0}={1}'.format(k, v) for k, v in kwargs.items()),
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**list_params
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)
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else:
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res = [
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e for e in service.list(**list_params) if len([
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k for k, v in kwargs.items() if getattr(e, k, None) == v
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]) == len(kwargs)
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]
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res = res or [None]
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return res[0]
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def search_by_name(service, name, **kwargs):
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"""
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Search for the entity by its name. Nested entities don't support search
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via REST, so in case using search for nested entity we return all entities
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and filter them by name.
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:param service: service of the entity
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:param name: name of the entity
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:return: Entity object returned by Python SDK
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"""
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# Check if 'list' method support search(look for search parameter):
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if 'search' in inspect.getargspec(service.list)[0]:
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res = service.list(
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search="name={name}".format(name=name)
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)
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else:
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res = [e for e in service.list() if e.name == name]
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if kwargs:
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res = [
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e for e in service.list() if len([
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k for k, v in kwargs.items() if getattr(e, k, None) == v
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]) == len(kwargs)
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]
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res = res or [None]
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return res[0]
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def get_entity(service, get_params=None):
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"""
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Ignore SDK Error in case of getting an entity from service.
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"""
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entity = None
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try:
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if get_params is not None:
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entity = service.get(**get_params)
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else:
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entity = service.get()
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except sdk.Error:
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# We can get here 404, we should ignore it, in case
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# of removing entity for example.
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pass
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return entity
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def get_id_by_name(service, name, raise_error=True, ignore_case=False):
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"""
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Search an entity ID by it's name.
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"""
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entity = search_by_name(service, name)
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if entity is not None:
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return entity.id
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if raise_error:
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raise Exception("Entity '%s' was not found." % name)
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def wait(
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service,
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condition,
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fail_condition=lambda e: False,
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timeout=180,
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wait=True,
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poll_interval=3,
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):
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"""
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Wait until entity fulfill expected condition.
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:param service: service of the entity
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:param condition: condition to be fulfilled
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:param fail_condition: if this condition is true, raise Exception
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:param timeout: max time to wait in seconds
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:param wait: if True wait for condition, if False don't wait
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:param poll_interval: Number of seconds we should wait until next condition check
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"""
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# Wait until the desired state of the entity:
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if wait:
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start = time.time()
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while time.time() < start + timeout:
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# Exit if the condition of entity is valid:
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entity = get_entity(service)
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if condition(entity):
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return
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elif fail_condition(entity):
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raise Exception("Error while waiting on result state of the entity.")
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# Sleep for `poll_interval` seconds if none of the conditions apply:
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time.sleep(float(poll_interval))
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raise Exception("Timeout exceed while waiting on result state of the entity.")
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def __get_auth_dict():
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OVIRT_URL = os.environ.get('OVIRT_URL')
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OVIRT_HOSTNAME = os.environ.get('OVIRT_HOSTNAME')
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OVIRT_USERNAME = os.environ.get('OVIRT_USERNAME')
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OVIRT_PASSWORD = os.environ.get('OVIRT_PASSWORD')
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OVIRT_TOKEN = os.environ.get('OVIRT_TOKEN')
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OVIRT_CAFILE = os.environ.get('OVIRT_CAFILE')
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OVIRT_INSECURE = OVIRT_CAFILE is None
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env_vars = None
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if OVIRT_URL is None and OVIRT_HOSTNAME is not None:
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OVIRT_URL = 'https://{0}/ovirt-engine/api'.format(OVIRT_HOSTNAME)
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if OVIRT_URL and ((OVIRT_USERNAME and OVIRT_PASSWORD) or OVIRT_TOKEN):
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env_vars = {
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'url': OVIRT_URL,
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'username': OVIRT_USERNAME,
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'password': OVIRT_PASSWORD,
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'insecure': OVIRT_INSECURE,
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'token': OVIRT_TOKEN,
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'ca_file': OVIRT_CAFILE,
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}
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if env_vars is not None:
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auth = dict(default=env_vars, type='dict')
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else:
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auth = dict(required=True, type='dict')
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return auth
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def ovirt_facts_full_argument_spec(**kwargs):
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"""
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Extend parameters of facts module with parameters which are common to all
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oVirt facts modules.
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:param kwargs: kwargs to be extended
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:return: extended dictionary with common parameters
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"""
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spec = dict(
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auth=__get_auth_dict(),
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fetch_nested=dict(default=False, type='bool'),
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nested_attributes=dict(type='list', default=list()),
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)
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spec.update(kwargs)
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return spec
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def ovirt_full_argument_spec(**kwargs):
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"""
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Extend parameters of module with parameters which are common to all oVirt modules.
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:param kwargs: kwargs to be extended
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:return: extended dictionary with common parameters
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"""
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spec = dict(
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auth=__get_auth_dict(),
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timeout=dict(default=180, type='int'),
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wait=dict(default=True, type='bool'),
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poll_interval=dict(default=3, type='int'),
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fetch_nested=dict(default=False, type='bool'),
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nested_attributes=dict(type='list', default=list()),
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)
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spec.update(kwargs)
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return spec
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|
|
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def check_params(module):
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"""
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Most modules must have either `name` or `id` specified.
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"""
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if module.params.get('name') is None and module.params.get('id') is None:
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module.fail_json(msg='"name" or "id" is required')
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def engine_supported(connection, version):
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return LooseVersion(engine_version(connection)) >= LooseVersion(version)
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|
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def check_support(version, connection, module, params):
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"""
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Check if parameters used by user are supported by oVirt Python SDK
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and oVirt engine.
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"""
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api_version = LooseVersion(engine_version(connection))
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version = LooseVersion(version)
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for param in params:
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if module.params.get(param) is not None:
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return LooseVersion(sdk_version.VERSION) >= version and api_version >= version
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|
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return True
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|
|
|
|
class BaseModule(object):
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"""
|
|
This is base class for oVirt modules. oVirt modules should inherit this
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class and override method to customize specific needs of the module.
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The only abstract method of this class is `build_entity`, which must
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to be implemented in child class.
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"""
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__metaclass__ = ABCMeta
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|
|
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def __init__(self, connection, module, service, changed=False):
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self._connection = connection
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self._module = module
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self._service = service
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self._changed = changed
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self._diff = {'after': dict(), 'before': dict()}
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|
|
@property
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def changed(self):
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return self._changed
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|
|
|
@changed.setter
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def changed(self, changed):
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if not self._changed:
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self._changed = changed
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|
|
|
@abstractmethod
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def build_entity(self):
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|
"""
|
|
This method should return oVirt Python SDK type, which we want to
|
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create or update, initialized by values passed by Ansible module.
|
|
|
|
For example if we want to create VM, we will return following:
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|
types.Vm(name=self._module.params['vm_name'])
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|
|
|
:return: Specific instance of sdk.Struct.
|
|
"""
|
|
pass
|
|
|
|
def param(self, name, default=None):
|
|
"""
|
|
Return a module parameter specified by it's name.
|
|
"""
|
|
return self._module.params.get(name, default)
|
|
|
|
def update_check(self, entity):
|
|
"""
|
|
This method handle checks whether the entity values are same as values
|
|
passed to ansible module. By default we don't compare any values.
|
|
|
|
:param entity: Entity we want to compare with Ansible module values.
|
|
:return: True if values are same, so we don't need to update the entity.
|
|
"""
|
|
return True
|
|
|
|
def pre_create(self, entity):
|
|
"""
|
|
This method is called right before entity is created.
|
|
|
|
:param entity: Entity to be created or updated.
|
|
"""
|
|
pass
|
|
|
|
def post_create(self, entity):
|
|
"""
|
|
This method is called right after entity is created.
|
|
|
|
:param entity: Entity which was created.
|
|
"""
|
|
pass
|
|
|
|
def post_update(self, entity):
|
|
"""
|
|
This method is called right after entity is updated.
|
|
|
|
:param entity: Entity which was updated.
|
|
"""
|
|
pass
|
|
|
|
def diff_update(self, after, update):
|
|
for k, v in update.items():
|
|
if isinstance(v, collections.Mapping):
|
|
after[k] = self.diff_update(after.get(k, dict()), v)
|
|
else:
|
|
after[k] = update[k]
|
|
return after
|
|
|
|
def create(
|
|
self,
|
|
entity=None,
|
|
result_state=None,
|
|
fail_condition=lambda e: False,
|
|
search_params=None,
|
|
update_params=None,
|
|
**kwargs
|
|
):
|
|
"""
|
|
Method which is called when state of the entity is 'present'. If user
|
|
don't provide `entity` parameter the entity is searched using
|
|
`search_params` parameter. If entity is found it's updated, whether
|
|
the entity should be updated is checked by `update_check` method.
|
|
The corresponding updated entity is build by `build_entity` method.
|
|
|
|
Function executed after entity is created can optionally be specified
|
|
in `post_create` parameter. Function executed after entity is updated
|
|
can optionally be specified in `post_update` parameter.
|
|
|
|
:param entity: Entity we want to update, if exists.
|
|
:param result_state: State which should entity has in order to finish task.
|
|
:param fail_condition: Function which checks incorrect state of entity, if it returns `True` Exception is raised.
|
|
:param search_params: Dictionary of parameters to be used for search.
|
|
:param update_params: The params which should be passed to update method.
|
|
:param kwargs: Additional parameters passed when creating entity.
|
|
:return: Dictionary with values returned by Ansible module.
|
|
"""
|
|
if entity is None:
|
|
entity = self.search_entity(search_params)
|
|
|
|
self.pre_create(entity)
|
|
|
|
if entity:
|
|
# Entity exists, so update it:
|
|
entity_service = self._service.service(entity.id)
|
|
if not self.update_check(entity):
|
|
new_entity = self.build_entity()
|
|
if not self._module.check_mode:
|
|
update_params = update_params or {}
|
|
updated_entity = entity_service.update(
|
|
new_entity,
|
|
**update_params
|
|
)
|
|
self.post_update(entity)
|
|
|
|
# Update diffs only if user specified --diff parameter,
|
|
# so we don't useless overload API:
|
|
if self._module._diff:
|
|
before = get_dict_of_struct(
|
|
entity,
|
|
self._connection,
|
|
fetch_nested=True,
|
|
attributes=['name'],
|
|
)
|
|
after = before.copy()
|
|
self.diff_update(after, get_dict_of_struct(new_entity))
|
|
self._diff['before'] = before
|
|
self._diff['after'] = after
|
|
|
|
self.changed = True
|
|
else:
|
|
# Entity don't exists, so create it:
|
|
if not self._module.check_mode:
|
|
entity = self._service.add(
|
|
self.build_entity(),
|
|
**kwargs
|
|
)
|
|
self.post_create(entity)
|
|
self.changed = True
|
|
|
|
if not self._module.check_mode:
|
|
# Wait for the entity to be created and to be in the defined state:
|
|
entity_service = self._service.service(entity.id)
|
|
|
|
def state_condition(entity):
|
|
return entity
|
|
|
|
if result_state:
|
|
|
|
def state_condition(entity):
|
|
return entity and entity.status == result_state
|
|
|
|
wait(
|
|
service=entity_service,
|
|
condition=state_condition,
|
|
fail_condition=fail_condition,
|
|
wait=self._module.params['wait'],
|
|
timeout=self._module.params['timeout'],
|
|
poll_interval=self._module.params['poll_interval'],
|
|
)
|
|
|
|
return {
|
|
'changed': self.changed,
|
|
'id': getattr(entity, 'id', None),
|
|
type(entity).__name__.lower(): get_dict_of_struct(
|
|
struct=entity,
|
|
connection=self._connection,
|
|
fetch_nested=self._module.params.get('fetch_nested'),
|
|
attributes=self._module.params.get('nested_attributes'),
|
|
),
|
|
'diff': self._diff,
|
|
}
|
|
|
|
def pre_remove(self, entity):
|
|
"""
|
|
This method is called right before entity is removed.
|
|
|
|
:param entity: Entity which we want to remove.
|
|
"""
|
|
pass
|
|
|
|
def entity_name(self, entity):
|
|
return "{e_type} '{e_name}'".format(
|
|
e_type=type(entity).__name__.lower(),
|
|
e_name=getattr(entity, 'name', None),
|
|
)
|
|
|
|
def remove(self, entity=None, search_params=None, **kwargs):
|
|
"""
|
|
Method which is called when state of the entity is 'absent'. If user
|
|
don't provide `entity` parameter the entity is searched using
|
|
`search_params` parameter. If entity is found it's removed.
|
|
|
|
Function executed before remove is executed can optionally be specified
|
|
in `pre_remove` parameter.
|
|
|
|
:param entity: Entity we want to remove.
|
|
:param search_params: Dictionary of parameters to be used for search.
|
|
:param kwargs: Additional parameters passed when removing entity.
|
|
:return: Dictionary with values returned by Ansible module.
|
|
"""
|
|
if entity is None:
|
|
entity = self.search_entity(search_params)
|
|
|
|
if entity is None:
|
|
return {
|
|
'changed': self.changed,
|
|
'msg': "Entity wasn't found."
|
|
}
|
|
|
|
self.pre_remove(entity)
|
|
|
|
entity_service = self._service.service(entity.id)
|
|
if not self._module.check_mode:
|
|
entity_service.remove(**kwargs)
|
|
wait(
|
|
service=entity_service,
|
|
condition=lambda entity: not entity,
|
|
wait=self._module.params['wait'],
|
|
timeout=self._module.params['timeout'],
|
|
poll_interval=self._module.params['poll_interval'],
|
|
)
|
|
self.changed = True
|
|
|
|
return {
|
|
'changed': self.changed,
|
|
'id': entity.id,
|
|
type(entity).__name__.lower(): get_dict_of_struct(
|
|
struct=entity,
|
|
connection=self._connection,
|
|
fetch_nested=self._module.params.get('fetch_nested'),
|
|
attributes=self._module.params.get('nested_attributes'),
|
|
),
|
|
}
|
|
|
|
def action(
|
|
self,
|
|
action,
|
|
entity=None,
|
|
action_condition=lambda e: e,
|
|
wait_condition=lambda e: e,
|
|
fail_condition=lambda e: False,
|
|
pre_action=lambda e: e,
|
|
post_action=lambda e: None,
|
|
search_params=None,
|
|
**kwargs
|
|
):
|
|
"""
|
|
This method is executed when we want to change the state of some oVirt
|
|
entity. The action to be executed on oVirt service is specified by
|
|
`action` parameter. Whether the action should be executed can be
|
|
specified by passing `action_condition` parameter. State which the
|
|
entity should be in after execution of the action can be specified
|
|
by `wait_condition` parameter.
|
|
|
|
Function executed before an action on entity can optionally be specified
|
|
in `pre_action` parameter. Function executed after an action on entity can
|
|
optionally be specified in `post_action` parameter.
|
|
|
|
:param action: Action which should be executed by service on entity.
|
|
:param entity: Entity we want to run action on.
|
|
:param action_condition: Function which is executed when checking if action should be executed.
|
|
:param fail_condition: Function which checks incorrect state of entity, if it returns `True` Exception is raised.
|
|
:param wait_condition: Function which is executed when waiting on result state.
|
|
:param pre_action: Function which is executed before running the action.
|
|
:param post_action: Function which is executed after running the action.
|
|
:param search_params: Dictionary of parameters to be used for search.
|
|
:param kwargs: Additional parameters passed to action.
|
|
:return: Dictionary with values returned by Ansible module.
|
|
"""
|
|
if entity is None:
|
|
entity = self.search_entity(search_params)
|
|
|
|
entity = pre_action(entity)
|
|
|
|
if entity is None:
|
|
self._module.fail_json(
|
|
msg="Entity not found, can't run action '{0}'.".format(
|
|
action
|
|
)
|
|
)
|
|
|
|
entity_service = self._service.service(entity.id)
|
|
entity = entity_service.get()
|
|
if action_condition(entity):
|
|
if not self._module.check_mode:
|
|
getattr(entity_service, action)(**kwargs)
|
|
self.changed = True
|
|
|
|
post_action(entity)
|
|
|
|
wait(
|
|
service=self._service.service(entity.id),
|
|
condition=wait_condition,
|
|
fail_condition=fail_condition,
|
|
wait=self._module.params['wait'],
|
|
timeout=self._module.params['timeout'],
|
|
poll_interval=self._module.params['poll_interval'],
|
|
)
|
|
return {
|
|
'changed': self.changed,
|
|
'id': entity.id,
|
|
type(entity).__name__.lower(): get_dict_of_struct(
|
|
struct=entity,
|
|
connection=self._connection,
|
|
fetch_nested=self._module.params.get('fetch_nested'),
|
|
attributes=self._module.params.get('nested_attributes'),
|
|
),
|
|
'diff': self._diff,
|
|
}
|
|
|
|
def wait_for_import(self, condition=lambda e: True):
|
|
if self._module.params['wait']:
|
|
start = time.time()
|
|
timeout = self._module.params['timeout']
|
|
poll_interval = self._module.params['poll_interval']
|
|
while time.time() < start + timeout:
|
|
entity = self.search_entity()
|
|
if entity and condition(entity):
|
|
return entity
|
|
time.sleep(poll_interval)
|
|
|
|
def search_entity(self, search_params=None, list_params=None):
|
|
"""
|
|
Always first try to search by `ID`, if ID isn't specified,
|
|
check if user constructed special search in `search_params`,
|
|
if not search by `name`.
|
|
"""
|
|
entity = None
|
|
|
|
if 'id' in self._module.params and self._module.params['id'] is not None:
|
|
entity = get_entity(self._service.service(self._module.params['id']), get_params=list_params)
|
|
elif search_params is not None:
|
|
entity = search_by_attributes(self._service, list_params=list_params, **search_params)
|
|
elif self._module.params.get('name') is not None:
|
|
entity = search_by_attributes(self._service, list_params=list_params, name=self._module.params['name'])
|
|
|
|
return entity
|