def _parse_common(item, ns):
"""Parse common values that all attributes must have.
:param item: an XML element.
:param ns: the namespace to search.
:returns: a dictionary containing the parsed attributes of the element.
:raises: DracOperationFailed if the given element had no AttributeName
value.
"""
searches = {
'current_value': './{%s}CurrentValue' % ns,
'read_only': './{%s}IsReadOnly' % ns,
'pending_value': './{%s}PendingValue' % ns
}
LOG.debug("Handing %(ns)s for %(xml)s", {
'ns': ns,
'xml': ET.tostring(item),
})
name = item.findtext('./{%s}AttributeName' % ns)
if not name:
raise exception.DracOperationFailed(
message=_('Item has no name: "%s"') % ET.tostring(item))
res = {}
res['name'] = name
for k in searches:
if k == 'read_only':
res[k] = item.findtext(searches[k]) == 'true'
else:
res[k] = _val_or_none(item.find(searches[k]))
return res
def _get_config(node, resource):
"""Helper for get_config.
Handles getting BIOS config values for a single namespace
:param node: an ironic node object.
:param resource: the namespace.
:returns: a dictionary that maps the name of each attribute to a dictionary
of values of that attribute.
:raises: InvalidParameterValue if some information required to connnect
to the DRAC is missing on the node or the value of one or more
required parameters is invalid.
:raises: DracClientError on an error from pywsman library.
:raises: DracOperationFailed if the specified resource is unknown.
"""
res = {}
client = wsman_client.get_wsman_client(node)
try:
doc = client.wsman_enumerate(resource)
except exception.DracClientError as exc:
with excutils.save_and_reraise_exception():
LOG.error(
_LE('DRAC driver failed to get BIOS settings '
'for resource %(resource)s '
'from node %(node_uuid)s. '
'Reason: %(error)s.'), {
'node_uuid': node.uuid,
'resource': resource,
'error': exc
})
items = doc.find('.//{%s}Items' % resource_uris.CIM_WSMAN)
for item in items:
if resource == resource_uris.DCIM_BIOSEnumeration:
attribute = parse_enumeration(item, resource)
elif resource == resource_uris.DCIM_BIOSString:
attribute = parse_string(item, resource)
elif resource == resource_uris.DCIM_BIOSInteger:
attribute = parse_integer(item, resource)
else:
raise exception.DracOperationFailed(
message=_('Unknown namespace %(ns)s for item: "%(item)s"') % {
'item': ET.tostring(item),
'ns': resource
})
res[attribute['name']] = attribute
return res
def wsman_invoke(self,
resource_uri,
method,
selectors=None,
properties=None,
expected_return_value=RET_SUCCESS):
"""Invokes a remote WS-Man method.
:param resource_uri: URI of the resource.
:param method: name of the method to invoke.
:param selectors: dictionary of selectors.
:param properties: dictionary of properties.
:param expected_return_value: expected return value.
:raises: DracClientError on an error from pywsman library.
:raises: DracOperationFailed on error reported back by DRAC.
:raises: DracUnexpectedReturnValue on return value mismatch.
:returns: an ElementTree object of the response received.
"""
if selectors is None:
selectors = {}
if properties is None:
properties = {}
options = pywsman.ClientOptions()
for name, value in selectors.items():
options.add_selector(name, value)
# NOTE(ifarkas): manually constructing the XML doc should be deleted
# once pywsman supports passing a list as a property.
# For now this is only a fallback method: in case no
# list provided, the supported pywsman API will be used.
list_included = any(
[isinstance(prop_item, list) for prop_item in properties.values()])
if list_included:
xml_doc = pywsman.XmlDoc('%s_INPUT' % method, resource_uri)
xml_root = xml_doc.root()
for name, value in properties.items():
if isinstance(value, list):
for item in value:
xml_root.add(resource_uri, name, item)
else:
xml_root.add(resource_uri, name, value)
else:
xml_doc = None
for name, value in properties.items():
options.add_property(name, value)
doc = retry_on_empty_response(self.client, 'invoke', options,
resource_uri, method, xml_doc)
root = self._get_root(doc)
return_value = drac_common.find_xml(root, 'ReturnValue',
resource_uri).text
if return_value != expected_return_value:
if return_value == RET_ERROR:
message = drac_common.find_xml(root, 'Message',
resource_uri).text
raise exception.DracOperationFailed(message=message)
else:
raise exception.DracUnexpectedReturnValue(
expected_return_value=expected_return_value,
actual_return_value=return_value)
return root
def set_config(task, **kwargs):
"""Sets the pending_value parameter for each of the values passed in.
:param task: an ironic task object.
:param kwargs: a dictionary of {'AttributeName': 'NewValue'}
:raises: DracOperationFailed if any new values are invalid.
:raises: DracOperationFailed if any of the attributes are read-only.
:raises: DracOperationFailed if any of the attributes cannot be set for
any other reason.
:raises: DracClientError on an error from the pywsman library.
:returns: A boolean indicating whether commit_config needs to be
called to make the changes.
"""
node = task.node
management.check_for_config_job(node)
current = get_config(node)
unknown_keys = set(kwargs) - set(current)
if unknown_keys:
LOG.warning(_LW('Ignoring unknown BIOS attributes "%r"'), unknown_keys)
candidates = set(kwargs) - unknown_keys
read_only_keys = []
unchanged_attribs = []
invalid_attribs_msgs = []
attrib_names = []
for k in candidates:
if str(kwargs[k]) == str(current[k]['current_value']):
unchanged_attribs.append(k)
elif current[k]['read_only']:
read_only_keys.append(k)
else:
if 'possible_values' in current[k]:
if str(kwargs[k]) not in current[k]['possible_values']:
m = _('Attribute %(attr)s cannot be set to value %(val)s.'
' It must be in %(ok)r') % {
'attr': k,
'val': kwargs[k],
'ok': current[k]['possible_values']
}
invalid_attribs_msgs.append(m)
continue
if ('pcre_regex' in current[k]
and current[k]['pcre_regex'] is not None):
regex = re.compile(current[k]['pcre_regex'])
if regex.search(str(kwargs[k])) is None:
# TODO(victor-lowther)
# Leave untranslated for now until the unicode
# issues that the test suite exposes are straightened out.
m = ('Attribute %(attr)s cannot be set to value %(val)s.'
' It must match regex %(re)s.') % {
'attr': k,
'val': kwargs[k],
're': current[k]['pcre_regex']
}
invalid_attribs_msgs.append(m)
continue
if 'lower_bound' in current[k]:
lower = current[k]['lower_bound']
upper = current[k]['upper_bound']
val = int(kwargs[k])
if val < lower or val > upper:
m = _('Attribute %(attr)s cannot be set to value %(val)d.'
' It must be between %(lower)d and %(upper)d.') % {
'attr': k,
'val': val,
'lower': lower,
'upper': upper
}
invalid_attribs_msgs.append(m)
continue
attrib_names.append(k)
if unchanged_attribs:
LOG.warning(_LW('Ignoring unchanged BIOS settings %r'),
unchanged_attribs)
if invalid_attribs_msgs or read_only_keys:
raise exception.DracOperationFailed(
_format_error_msg(invalid_attribs_msgs, read_only_keys))
if not attrib_names:
return False
client = wsman_client.get_wsman_client(node)
selectors = {
'CreationClassName': 'DCIM_BIOSService',
'Name': 'DCIM:BIOSService',
'SystemCreationClassName': 'DCIM_ComputerSystem',
'SystemName': 'DCIM:ComputerSystem'
}
properties = {
'Target': 'BIOS.Setup.1-1',
'AttributeName': attrib_names,
'AttributeValue': map(lambda k: kwargs[k], attrib_names)
}
doc = client.wsman_invoke(resource_uris.DCIM_BIOSService, 'SetAttributes',
selectors, properties)
# Yes, we look for RebootRequired. In this context, that actually means
# that we need to create a lifecycle controller config job and then reboot
# so that the lifecycle controller can commit the BIOS config changes that
# we have proposed.
set_results = doc.findall('.//{%s}RebootRequired' %
resource_uris.DCIM_BIOSService)
return any(str(res.text) == 'Yes' for res in set_results)
def get_config(node):
"""Get the BIOS configuration from a Dell server using WSMAN
:param node: an ironic node object.
:raises: DracClientError on an error from pywsman.
:raises: DracOperationFailed when a BIOS setting cannot be parsed.
:returns: a dictionary containing BIOS settings in the form of:
{'EnumAttrib': {'name': 'EnumAttrib',
'current_value': 'Value',
'pending_value': 'New Value', # could also be None
'read_only': False,
'possible_values': ['Value', 'New Value', 'None']},
'StringAttrib': {'name': 'StringAttrib',
'current_value': 'Information',
'pending_value': None,
'read_only': False,
'min_length': 0,
'max_length': 255,
'pcre_regex': '^[0-9A-Za-z]{0,255}$'},
'IntegerAttrib': {'name': 'IntegerAttrib',
'current_value': 0,
'pending_value': None,
'read_only': True,
'lower_bound': 0,
'upper_bound': 65535}
}
The above values are only examples, of course. BIOS attributes exposed via
this API will always be either an enumerated attribute, a string attribute,
or an integer attribute. All attributes have the following parameters:
:name: is the name of the BIOS attribute.
:current_value: is the current value of the attribute.
It will always be either an integer or a string.
:pending_value: is the new value that we want the attribute to have.
None means that there is no pending value.
:read_only: indicates whether this attribute can be changed. Trying to
change a read-only value will result in an error.
The read-only flag can change depending on other attributes.
A future version of this call may expose the dependencies
that indicate when that may happen.
Enumerable attributes also have the following parameters:
:possible_values: is an array of values it is permissible to set
the attribute to.
String attributes also have the following parameters:
:min_length: is the minimum length of the string.
:max_length: is the maximum length of the string.
:pcre_regex: is a PCRE compatible regular expression that the string
must match. It may be None if the string is read only
or if the string does not have to match any particular
regular expression.
Integer attributes also have the following parameters:
:lower_bound: is the minimum value the attribute can have.
:upper_bound: is the maximum value the attribute can have.
"""
res = {}
for ns in [
resource_uris.DCIM_BIOSEnumeration, resource_uris.DCIM_BIOSString,
resource_uris.DCIM_BIOSInteger
]:
attribs = _get_config(node, ns)
if not set(res).isdisjoint(set(attribs)):
raise exception.DracOperationFailed(
message=_('Colliding attributes %r') %
(set(res) & set(attribs)))
res.update(attribs)
return res
def wsman_invoke(self,
resource_uri,
method,
selectors=None,
properties=None,
expected_return=None):
"""Invokes a remote WS-Man method.
:param resource_uri: URI of the resource.
:param method: name of the method to invoke.
:param selectors: dictionary of selectors.
:param properties: dictionary of properties.
:param expected_return: expected return value.
:raises: DracClientError on an error from pywsman library.
:raises: DracOperationFailed on error reported back by DRAC.
:raises: DracUnexpectedReturnValue on return value mismatch.
:returns: an ElementTree object of the response received.
"""
if selectors is None:
selectors = {}
if properties is None:
properties = {}
options = pywsman.ClientOptions()
for name, value in selectors.items():
options.add_selector(name, value)
# NOTE(ifarkas): manually constructing the XML doc should be deleted
# once pywsman supports passing a list as a property.
# For now this is only a fallback method: in case no
# list provided, the supported pywsman API will be used.
list_included = any(
[isinstance(prop_item, list) for prop_item in properties.values()])
if list_included:
xml_doc = pywsman.XmlDoc('%s_INPUT' % method, resource_uri)
xml_root = xml_doc.root()
for name, value in properties.items():
if isinstance(value, list):
for item in value:
xml_root.add(resource_uri, str(name), str(item))
else:
xml_root.add(resource_uri, name, value)
LOG.debug(
('WSMAN invoking: %(resource_uri)s:%(method)s'
'\nselectors: %(selectors)r\nxml: %(xml)s'), {
'resource_uri': resource_uri,
'method': method,
'selectors': selectors,
'xml': xml_root.string()
})
else:
xml_doc = None
for name, value in properties.items():
options.add_property(name, value)
LOG.debug(
('WSMAN invoking: %(resource_uri)s:%(method)s'
'\nselectors: %(selectors)r\properties: %(props)r') % {
'resource_uri': resource_uri,
'method': method,
'selectors': selectors,
'props': properties
})
doc = retry_on_empty_response(self.client, 'invoke', options,
resource_uri, method, xml_doc)
root = self._get_root(doc)
LOG.debug("WSMAN invoke returned raw XML: %s",
ElementTree.tostring(root))
return_value = drac_common.find_xml(root, 'ReturnValue',
resource_uri).text
if return_value == RET_ERROR:
messages = drac_common.find_xml(root, 'Message', resource_uri,
True)
message_args = drac_common.find_xml(root, 'MessageArguments',
resource_uri, True)
if message_args:
messages = [
m.text % p.text for (m, p) in zip(messages, message_args)
]
else:
messages = [m.text for m in messages]
raise exception.DracOperationFailed(message='%r' % messages)
if expected_return and return_value != expected_return:
raise exception.DracUnexpectedReturnValue(
expected_return_value=expected_return,
actual_return_value=return_value)
return root
