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_session.py
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_session.py
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# Copyright 2016-2021 IBM Corp. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
A faked Session class for the zhmcclient package.
"""
from __future__ import absolute_import
try:
from collections import OrderedDict
except ImportError:
from ordereddict import OrderedDict
import yaml
import yamlloader
import jsonschema
import zhmcclient
from zhmcclient._utils import datetime_from_isoformat
from ._hmc import FakedHmc, FakedMetricObjectValues
from ._urihandler import UriHandler, HTTPError, URIS
from ._urihandler import ConnectionError # pylint: disable=redefined-builtin
__all__ = ['FakedSession', 'HmcDefinitionYamlError', 'HmcDefinitionSchemaError']
# JSON schema for a faked HMC definition
FAKED_HMC_DEFINITION_SCHEMA = {
"$schema": "http://json-schema.org/draft-07/schema#",
"description": "JSON schema for a faked HMC definition",
"definitions": {
"Properties": {
"description": "Dictionary of resource properties. Keys are the "
"property names in HMC format (with dashes)",
"type": "object",
"patternProperties": {
"^[a-z0-9\\-]+$": {
"description": "A resource property value",
"type": ["object", "array", "string", "integer", "number",
"boolean", "null"],
},
},
},
"Hmc": {
"description": "The definition of a faked HMC",
"type": "object",
"additionalProperties": False,
"required": [
"host",
"api_version",
"consoles",
],
"properties": {
"host": {
"description": "The hostname or IP address of the HMC host",
"type": "string",
},
"api_version": {
"description": "The version of the HMC WS API, as "
"major.minor",
"type": "string",
},
"metric_values": {
"description": "The metric values prepared for later "
"retrieval",
"type": "array",
"items": {
"$ref": "#/definitions/MetricValues"
},
},
"metrics_contexts": {
"description": "The metrics contexts defined on this HMC",
"type": "array",
"items": {
"$ref": "#/definitions/MetricsContext"
},
},
"consoles": {
"description": "The consoles (HMCs). There is only "
"a single console.",
"type": "array",
"maxItems": 1,
"items": {
"$ref": "#/definitions/Console"
},
},
"cpcs": {
"description": "The CPCs managed by this HMC",
"type": "array",
"items": {
"$ref": "#/definitions/Cpc"
},
},
},
},
"MetricValues": {
"description": "The metric values of a single metric group for a "
"single resource object at a point in time, "
"prepared for later retrieval",
"type": "object",
"additionalProperties": False,
"required": [
"group_name",
"resource_uri",
"timestamp",
"metrics",
],
"properties": {
"group_name": {
"description": "Name of the metric group definition for "
"these metric values",
"type": "string",
},
"resource_uri": {
"description": "URI of the resource object for these "
"metric values",
"type": "string",
},
"timestamp": {
"description": "Point in time for these metric values, "
"as a string in ISO8601 format",
"type": "string",
},
"metrics": {
"description": "The metrics (values by name)",
"type": "object",
"patternProperties": {
"^[a-z0-9\\-]+$": {
"description": "The value of the metric",
"type": ["string", "integer", "number",
"boolean", "null"],
},
},
},
},
},
"MetricsContext": {
"description": "A metrics context defined on an HMC",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"Console": {
"description": "A console (HMC)",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
"users": {
"description": "The users defined on this HMC",
"type": "array",
"items": {
"$ref": "#/definitions/User"
},
},
"user_roles": {
"description": "The user roles defined on this HMC",
"type": "array",
"items": {
"$ref": "#/definitions/UserRole"
},
},
"user_patterns": {
"description": "The user patterns defined on this HMC",
"type": "array",
"items": {
"$ref": "#/definitions/UserPattern"
},
},
"password_rules": {
"description": "The password rules defined on this HMC",
"type": "array",
"items": {
"$ref": "#/definitions/PasswordRule"
},
},
"tasks": {
"description": "The tasks defined on this HMC",
"type": "array",
"items": {
"$ref": "#/definitions/Task"
},
},
"ldap_server_definitions": {
"description": "The LDAP server definitions on this HMC",
"type": "array",
"items": {
"$ref": "#/definitions/LdapServerDefinition"
},
},
"unmanaged_cpcs": {
"description": "The unmanaged CPCs discovered by this HMC",
"type": "array",
"items": {
"$ref": "#/definitions/UnmanagedCpc"
},
},
"storage_groups": {
"description": "The storage groups defined on this HMC",
"type": "array",
"items": {
"$ref": "#/definitions/StorageGroup"
},
},
},
},
"User": {
"description": "A user defined on an HMC",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"UserRole": {
"description": "A user role defined on an HMC",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"UserPattern": {
"description": "A user pattern defined on an HMC",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"PasswordRule": {
"description": "A password rule defined on an HMC",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"Task": {
"description": "A task defined on an HMC",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"LdapServerDefinition": {
"description": "An LPAP server definition on an HMC",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"UnmanagedCpc": {
"description": "An unmanaged CPC discovered by an HMC",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"StorageGroup": {
"description": "A storage group defined on an HMC (and associated "
"with a CPC)",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
"storage_volumes": {
"description": "The storage volumes of this storage group",
"type": "array",
"items": {
"$ref": "#/definitions/StorageVolume"
},
},
},
},
"StorageVolume": {
"description": "A storage volume of a storage group",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"Cpc": {
"description": "A CPC managed by an HMC",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
"capacity_groups": {
"description": "The capacity groups of this CPC (any mode)",
"type": "array",
"items": {
"$ref": "#/definitions/CapacityGroup"
},
},
"partitions": {
"description": "The partitions of this CPC (DPM mode)",
"type": "array",
"items": {
"$ref": "#/definitions/Partition"
},
},
"adapters": {
"description": "The adapters of this CPC (DPM mode)",
"type": "array",
"items": {
"$ref": "#/definitions/Adapter"
},
},
"virtual_switches": {
"description": "The virtual switches of this CPC "
"(DPM mode)",
"type": "array",
"items": {
"$ref": "#/definitions/VirtualSwitch"
},
},
"lpars": {
"description": "The LPARs of this CPC (classic mode)",
"type": "array",
"items": {
"$ref": "#/definitions/Lpar"
},
},
"reset_activation_profiles": {
"description": "The reset activation profiles of this CPC "
"(classic mode)",
"type": "array",
"items": {
"$ref": "#/definitions/ResetActivationProfile"
},
},
"image_activation_profiles": {
"description": "The image activation profiles of this CPC "
"(classic mode)",
"type": "array",
"items": {
"$ref": "#/definitions/ImageActivationProfile"
},
},
"load_activation_profiles": {
"description": "The load activation profiles of this CPC "
"(classic mode)",
"type": "array",
"items": {
"$ref": "#/definitions/LoadActivationProfile"
},
},
},
},
"CapacityGroup": {
"description": "A capacity group in a CPC",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"Partition": {
"description": "A partition of a CPC (DPM mode)",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
"devno_pool": {
"description": "Internal state: The pool of "
"auto-allocated device numbers for this "
"partition",
"type": "object",
"additionalProperties": True,
},
"wwpn_pool": {
"description": "Internal state: The pool of "
"auto-allocated WWPNs for this partition",
"type": "object",
"additionalProperties": True,
},
"nics": {
"description": "The NICs of this partition",
"type": "array",
"items": {
"$ref": "#/definitions/Nic"
},
},
"hbas": {
"description": "The HBAs of this partition (up to z13)",
"type": "array",
"items": {
"$ref": "#/definitions/Hba"
},
},
"virtual_functions": {
"description": "The virtual functions of this partition",
"type": "array",
"items": {
"$ref": "#/definitions/VirtualFunction"
},
},
},
},
"Nic": {
"description": "A NIC of a partition",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"Hba": {
"description": "An HBA of a partition (up to z13)",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"VirtualFunction": {
"description": "A virtual function of a partition",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"Adapter": {
"description": "An adapter of a CPC (DPM mode)",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
"ports": {
"description": "The ports of this adapter",
"type": "array",
"items": {
"$ref": "#/definitions/Port"
},
},
},
},
"Port": {
"description": "A port of an adapter",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"Lpar": {
"description": "An LPAR of a CPC (classic mode)",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"VirtualSwitch": {
"description": "A virtual switch in a CPC (DPM mode)",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"ResetActivationProfile": {
"description": "A reset activation profile of a CPC (classic mode)",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"ImageActivationProfile": {
"description": "An image activation profile of a CPC "
"(classic mode)",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
"LoadActivationProfile": {
"description": "A load activation profile of a CPC (classic mode)",
"type": "object",
"additionalProperties": False,
"required": [
"properties",
],
"properties": {
"properties": {
"$ref": "#/definitions/Properties"
},
},
},
},
"type": "object",
"additionalProperties": False,
"required": [
"hmc_definition",
],
"properties": {
"hmc_definition": {
"$ref": "#/definitions/Hmc"
},
},
}
class HmcDefinitionYamlError(Exception):
"""
An error that is raised when loading an HMC definition and that indicates
invalid YAML syntax in the faked HMC definition, at the YAML scanner or
parser level.
``args[0]`` will be set to a message detailing the issue.
"""
def __init__(self, message):
# pylint: disable=useless-super-delegation
super(HmcDefinitionYamlError, self).__init__(message)
class HmcDefinitionSchemaError(Exception):
"""
An error that is raised when loading an HMC definition and that indicates
that the data in the faked HMC definition fails schema validation.
``args[0]`` will be set to a message detailing the issue.
"""
def __init__(self, message):
# pylint: disable=useless-super-delegation
super(HmcDefinitionSchemaError, self).__init__(message)
class FakedSession(zhmcclient.Session):
"""
A faked Session class for the zhmcclient package, that can be used as a
replacement for the :class:`zhmcclient.Session` class.
This class is derived from :class:`zhmcclient.Session`.
This class can be used by projects using the zhmcclient package for their
unit testing. It can also be used by unit tests of the zhmcclient package
itself.
This class provides a faked HMC with all of its resources that are relevant
for the zhmcclient.
The faked HMC provided by this class maintains its resource state in memory
as Python objects, and no communication happens to any real HMC. The
faked HMC implements all HMC operations that are relevant for the
zhmcclient package in a successful manner.
It is possible to populate the faked HMC with an initial resource state
(see :meth:`~zhmcclient_mock.FakedHmc.add_resources`).
"""
def __init__(self, host, hmc_name, hmc_version, api_version,
userid=None, password=None):
"""
Parameters:
host (:term:`string`):
HMC host the mocked HMC will be set up with.
hmc_name (:term:`string`):
HMC name. Used for result of Query Version Info operation.
hmc_version (:term:`string`):
HMC version string (e.g. '2.13.1'). Used for result of
Query Version Info operation.
api_version (:term:`string`):
HMC API version string (e.g. '1.8'). Used for result of
Query Version Info operation.
userid (:term:`string`):
HMC userid for logging in to the mocked HMC.
password (:term:`string`):
HMC password for logging in to the mocked HMC.
"""
super(FakedSession, self).__init__(
host, userid=userid, password=password)
self._hmc = FakedHmc(hmc_name, hmc_version, api_version)
self._urihandler = UriHandler(URIS)
self._object_topic = 'faked-notification-topic'
self._job_topic = 'faked-job-notification-topic'
def __repr__(self):
"""
Return a string with the state of this faked session, for debug
purposes.
"""
ret = (
"{classname} at 0x{id:08x} (\n"
" _host = {s._host!r}\n"
" _userid = {s._userid!r}\n"
" _password = '...'\n"
" _get_password = {s._get_password!r}\n"
" _retry_timeout_config = {s._retry_timeout_config!r}\n"
" _base_url = {s._base_url!r}\n"
" _headers = {s._headers!r}\n"
" _session_id = {s._session_id!r}\n"
" _session = {s._session!r}\n"
" _hmc = {hmc_classname} at 0x{hmc_id:08x}\n"
" _urihandler = {s._urihandler!r}\n"
")".format(
classname=self.__class__.__name__,
id=id(self),
hmc_classname=self._hmc.__class__.__name__,
hmc_id=id(self._hmc),
s=self))
return ret
@property
def hmc(self):
"""
:class:`~zhmcclient_mock.FakedHmc`: The faked HMC provided by this
faked session.
The faked HMC supports being populated with initial resource state,
for example using its :meth:`zhmcclient_mock.FakedHmc.add_resources`
method.
As an alternative to providing an entire resource tree, the resources
can also be added one by one, from top to bottom, using the
:meth:`zhmcclient_mock.FakedBaseManager.add` methods of the
respective managers (the top-level manager for CPCs can be accessed
via ``hmc.cpcs``).
"""
return self._hmc
@staticmethod
def from_hmc_yaml_file(filepath, userid=None, password=None):
"""
Return a new FakedSession object from an HMC definition in a YAML file.
The data format of the YAML file is validated using a schema.
Parameters:
filepath(:term:`string`): Path name of the YAML file that contains
the HMC definition.
userid (:term:`string`):
Userid of the HMC user to be used for logging in, or `None`.
password (:term:`string`):
Password of the HMC user if `userid` was specified, or `None`.
Returns:
FakedSession: New faked session with faked HMC set up from HMC
definition.
Raises:
IOError: Error opening the YAML file for reading.
YamlFormatError: Invalid YAML syntax in HMC definition.
HmcDefinitionSchemaError: Invalid data format in HMC definition.
"""
# pylint: disable=unspecified-encoding
with open(filepath) as fp:
hmc = FakedSession.from_hmc_yaml(fp, filepath, userid, password)
return hmc
@staticmethod
def from_hmc_yaml(hmc_yaml, filepath=None, userid=None, password=None):
"""
Return a new FakedSession object from an HMC definition YAML string
or stream.
An HMC definition YAML string can be created using
:meth:`zhmcclient.Client.to_hmc_yaml`.
The timestamp in metric values can have any valid ISO8601 format.
Timezone-naive values are amended with the local timezone.
The data format of the YAML string is validated using a schema.
Parameters:
hmc_yaml(string or stream): HMC definition YAML string or stream.
filepath(string): Path name of the YAML file that contains the HMC
definition; used only in exception messages. If `None`, no
filename is used in exception messages.
userid (:term:`string`):
Userid of the HMC user to be used for logging in, or `None`.
password (:term:`string`):
Password of the HMC user if `userid` was specified, or `None`.
Returns:
FakedSession: New faked session with faked HMC set up from HMC
definition.
Raises:
YamlFormatError: Invalid YAML syntax in HMC definition YAML string
or stream.
HmcDefinitionSchemaError: Invalid data format in HMC definition.
"""
try:
hmc_dict = yaml.load(hmc_yaml, Loader=yamlloader.ordereddict.Loader)
except (yaml.parser.ParserError, yaml.scanner.ScannerError) as exc:
if filepath:
file_str = " in file {f}".format(f=filepath)
else:
file_str = ""
new_exc = HmcDefinitionYamlError(
"Invalid YAML syntax in faked HMC definition{fs}: {msg}".
format(fs=file_str, msg=exc))
new_exc.__cause__ = None
raise new_exc # HmcDefinitionYamlError
hmc = FakedSession.from_hmc_dict(hmc_dict, filepath, userid, password)
return hmc
@staticmethod
def from_hmc_dict(hmc_dict, filepath=None, userid=None, password=None):
"""
Return a new FakedSession object from an HMC definition dictionary.
An HMC definition dictionary can be created using
:meth:`zhmcclient.Client.to_hmc_dict`.
The timestamp in metric values can have any valid ISO8601 format.
Timezone-naive values are amended with the local timezone.
The data format of the YAML string is validated using a schema.
Parameters:
hmc_dict(dict): HMC definition dictionary.
filepath(string): Path name of the YAML file that contains the HMC
definition; used only in exception messages. If `None`, no
filename is used in exception messages.
userid (:term:`string`):
Userid of the HMC user to be used for logging in, or `None`.
password (:term:`string`):
Password of the HMC user if `userid` was specified, or `None`.
Returns:
FakedSession: New faked session with faked HMC set up from the HMC
definition.
Raises:
HmcDefinitionSchemaError: Invalid data format in HMC definition.
"""
try:
jsonschema.validate(hmc_dict, FAKED_HMC_DEFINITION_SCHEMA)
except jsonschema.exceptions.ValidationError as exc:
if filepath:
file_str = " in file {f}".format(f=filepath)
else:
file_str = ""
new_exc = HmcDefinitionSchemaError(
"Invalid data format in faked HMC definition{fs}: {msg}; "
"Offending element: {elem}; "
"Schema item: {schemaitem}; "
"Validator: {valname}={valvalue}".
format(fs=file_str, msg=exc.message,
elem='.'.join(str(e) for e in exc.absolute_path),
schemaitem='.'.join(str(e) for e in
exc.absolute_schema_path),
valname=exc.validator,
valvalue=exc.validator_value))
new_exc.__cause__ = None
raise new_exc # HmcDefinitionSchemaError
hmc_res_dict = hmc_dict['hmc_definition']
consoles = hmc_res_dict.get('consoles')
console = consoles[0]
host = hmc_res_dict['host']
api_version = hmc_res_dict['api_version']
hmc_name = console['properties']['name']
hmc_version = console['properties']['version']
session = FakedSession(host, hmc_name, hmc_version, api_version,
userid=userid, password=password)
res_dict = OrderedDict()
res_dict['consoles'] = consoles
cpcs = hmc_res_dict.get('cpcs')
if cpcs:
res_dict['cpcs'] = cpcs
metrics_contexts = hmc_res_dict.get('metrics_contexts')
if metrics_contexts:
res_dict['metrics_contexts'] = metrics_contexts
session.hmc.add_resources(res_dict)
mv_dicts = hmc_res_dict.get('metric_values')
if mv_dicts:
for mv_dict in mv_dicts:
group_name = mv_dict['group_name']
resource_uri = mv_dict['resource_uri']
timestamp = datetime_from_isoformat(mv_dict['timestamp'])
values = []
for name, value in mv_dict['metrics'].items():
item_tup = (name, value)
values.append(item_tup)
mv = FakedMetricObjectValues(
group_name=group_name,
resource_uri=resource_uri,
timestamp=timestamp,
values=values)
session.hmc.add_metric_values(mv)
return session
def get(self, uri, logon_required=True):
"""
Perform the HTTP GET method against the resource identified by a URI,
on the faked HMC.
Parameters:
uri (:term:`string`):
Relative URI path of the resource, e.g. "/api/session".
This URI is relative to the base URL of the session (see
the :attr:`~zhmcclient.Session.base_url` property).
Must not be `None`.
logon_required (bool):
Boolean indicating whether the operation requires that the session
is logged on to the HMC.
Because this is a faked HMC, this does not perform a real logon,
but it is still used to update the state in the faked HMC.
Returns:
:term:`json object` with the operation result.
Raises:
:exc:`~zhmcclient.HTTPError`
:exc:`~zhmcclient.ParseError` (not implemented)
:exc:`~zhmcclient.AuthError` (not implemented)
:exc:`~zhmcclient.ConnectionError`
"""
try:
return self._urihandler.get(self._hmc, uri, logon_required)
except HTTPError as exc:
new_exc = zhmcclient.HTTPError(exc.response())
new_exc.__cause__ = None
raise new_exc # zhmcclient.HTTPError
except ConnectionError as exc:
new_exc = zhmcclient.ConnectionError(exc.message, None)
new_exc.__cause__ = None
raise new_exc # zhmcclient.ConnectionError
def post(self, uri, body=None, logon_required=True,
wait_for_completion=True, operation_timeout=None):
"""
Perform the HTTP POST method against the resource identified by a URI,
using a provided request body, on the faked HMC.
HMC operations using HTTP POST are either synchronous or asynchronous.
Asynchronous operations return the URI of an asynchronously executing
job that can be queried for status and result.