diff --git a/doc/requirements.txt b/doc/requirements.txt
index 702fb23bc7..d7394a9e69 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -3,6 +3,5 @@ os-api-ref>=1.4.0 # Apache-2.0
 reno>=3.1.0 # Apache-2.0
 sphinx>=2.0.0,!=2.1.0 # BSD
 sphinxcontrib-apidoc>=0.2.0  # BSD
-sphinxcontrib-pecanwsme>=0.10.0 # Apache-2.0
 sphinxcontrib-seqdiag>=0.8.4 # BSD
 sphinxcontrib-svg2pdfconverter>=0.1.0 # BSD
diff --git a/doc/source/conf.py b/doc/source/conf.py
index ca13aa69c3..1f667a4b42 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -34,8 +34,6 @@ sys.path.insert(0, os.path.join(os.path.abspath('.'), '_exts'))
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = ['sphinx.ext.viewcode',
               'sphinx.ext.graphviz',
-              'sphinxcontrib.httpdomain',
-              'sphinxcontrib.pecanwsme.rest',
               'sphinxcontrib.seqdiag',
               'sphinxcontrib.apidoc',
               'sphinxcontrib.rsvgconverter',
diff --git a/ironic/api/types.py b/ironic/api/types.py
index ae9efa55d4..54ef9efba8 100644
--- a/ironic/api/types.py
+++ b/ironic/api/types.py
@@ -1,38 +1,749 @@
 # coding: utf-8
 #
-# Copyright 2020 Red Hat, Inc.
-# All Rights Reserved.
+# Copyright 2011-2019 the WSME authors and contributors
+# (See https://opendev.org/x/wsme/)
 #
-#    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
+# This module is part of WSME and is also released under
+# the MIT License: http://www.opensource.org/licenses/mit-license.php
 #
-#         http://www.apache.org/licenses/LICENSE-2.0
+# 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
 #
-#    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.
+#      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.
 
-from wsme.types import ArrayType  # noqa
-from wsme.types import Base  # noqa
-from wsme.types import DictType  # noqa
-from wsme.types import Enum  # noqa
-from wsme.types import File  # noqa
-from wsme.types import IntegerType  # noqa
-from wsme.types import iscomplex  # noqa
-from wsme.types import isusertype  # noqa
-from wsme.types import list_attributes  # noqa
-from wsme.types import registry  # noqa
-from wsme.types import StringType  # noqa
-from wsme.types import text  # noqa
-from wsme.types import Unset  # noqa
-from wsme.types import UnsetType  # noqa
-from wsme.types import UserType  # noqa
-from wsme.types import validate_value  # noqa
-from wsme.types import wsattr  # noqa
-from wsme.types import wsproperty  # noqa
+
+import base64
+import datetime
+import decimal
+import inspect
+import io
+import re
+import weakref
+
+from oslo_log import log
+
+from ironic.common import exception
+
+
+LOG = log.getLogger(__name__)
+
+
+pod_types = (int, bytes, str, float, bool)
+native_types = pod_types + (datetime.datetime, decimal.Decimal)
+_promotable_types = (int, str, bytes)
+
+
+class ArrayType(object):
+    def __init__(self, item_type):
+        if iscomplex(item_type):
+            self._item_type = weakref.ref(item_type)
+        else:
+            self._item_type = item_type
+
+    def __hash__(self):
+        return hash(self.item_type)
+
+    def __eq__(self, other):
+        return isinstance(other, ArrayType) \
+            and self.item_type == other.item_type
+
+    def sample(self):
+        return [getattr(self.item_type, 'sample', self.item_type)()]
+
+    @property
+    def item_type(self):
+        if isinstance(self._item_type, weakref.ref):
+            return self._item_type()
+        else:
+            return self._item_type
+
+    def validate(self, value):
+        if value is None:
+            return
+        if not isinstance(value, list):
+            raise ValueError("Wrong type. Expected '[%s]', got '%s'" % (
+                self.item_type, type(value)
+            ))
+        return [
+            validate_value(self.item_type, item)
+            for item in value
+        ]
+
+
+class DictType(object):
+    def __init__(self, key_type, value_type):
+        if key_type not in (int, bytes, str, float, bool):
+            raise ValueError("Dictionaries key can only be a pod type")
+        self.key_type = key_type
+        if iscomplex(value_type):
+            self._value_type = weakref.ref(value_type)
+        else:
+            self._value_type = value_type
+
+    def __hash__(self):
+        return hash((self.key_type, self.value_type))
+
+    def sample(self):
+        key = getattr(self.key_type, 'sample', self.key_type)()
+        value = getattr(self.value_type, 'sample', self.value_type)()
+        return {key: value}
+
+    @property
+    def value_type(self):
+        if isinstance(self._value_type, weakref.ref):
+            return self._value_type()
+        else:
+            return self._value_type
+
+    def validate(self, value):
+        if not isinstance(value, dict):
+            raise ValueError("Wrong type. Expected '{%s: %s}', got '%s'" % (
+                self.key_type, self.value_type, type(value)
+            ))
+        return dict((
+            (
+                validate_value(self.key_type, key),
+                validate_value(self.value_type, v)
+            ) for key, v in value.items()
+        ))
+
+
+class UserType(object):
+    basetype = None
+    name = None
+
+    def validate(self, value):
+        return value
+
+    def tobasetype(self, value):
+        return value
+
+    def frombasetype(self, value):
+        return value
+
+
+def isusertype(class_):
+    return isinstance(class_, UserType)
+
+
+class BinaryType(UserType):
+    """A user type that use base64 strings to carry binary data.
+
+    """
+    basetype = bytes
+    name = 'binary'
+
+    def tobasetype(self, value):
+        if value is None:
+            return None
+        return base64.encodestring(value)
+
+    def frombasetype(self, value):
+        if value is None:
+            return None
+        return base64.decodestring(value)
+
+
+#: The binary almost-native type
+binary = BinaryType()
+
+
+class IntegerType(UserType):
+    """A simple integer type. Can validate a value range.
+
+    :param minimum: Possible minimum value
+    :param maximum: Possible maximum value
+
+    Example::
+
+        Price = IntegerType(minimum=1)
+
+    """
+    basetype = int
+    name = "integer"
+
+    def __init__(self, minimum=None, maximum=None):
+        self.minimum = minimum
+        self.maximum = maximum
+
+    @staticmethod
+    def frombasetype(value):
+        return int(value) if value is not None else None
+
+    def validate(self, value):
+        if self.minimum is not None and value < self.minimum:
+            error = 'Value should be greater or equal to %s' % self.minimum
+            raise ValueError(error)
+
+        if self.maximum is not None and value > self.maximum:
+            error = 'Value should be lower or equal to %s' % self.maximum
+            raise ValueError(error)
+
+        return value
+
+
+class StringType(UserType):
+    """A simple string type. Can validate a length and a pattern.
+
+    :param min_length: Possible minimum length
+    :param max_length: Possible maximum length
+    :param pattern: Possible string pattern
+
+    Example::
+
+        Name = StringType(min_length=1, pattern='^[a-zA-Z ]*$')
+
+    """
+    basetype = str
+    name = "string"
+
+    def __init__(self, min_length=None, max_length=None, pattern=None):
+        self.min_length = min_length
+        self.max_length = max_length
+        if isinstance(pattern, str):
+            self.pattern = re.compile(pattern)
+        else:
+            self.pattern = pattern
+
+    def validate(self, value):
+        if not isinstance(value, self.basetype):
+            error = 'Value should be string'
+            raise ValueError(error)
+
+        if self.min_length is not None and len(value) < self.min_length:
+            error = 'Value should have a minimum character requirement of %s' \
+                    % self.min_length
+            raise ValueError(error)
+
+        if self.max_length is not None and len(value) > self.max_length:
+            error = 'Value should have a maximum character requirement of %s' \
+                    % self.max_length
+            raise ValueError(error)
+
+        if self.pattern is not None and not self.pattern.search(value):
+            error = 'Value should match the pattern %s' % self.pattern.pattern
+            raise ValueError(error)
+
+        return value
+
+
+class Enum(UserType):
+    """A simple enumeration type. Can be based on any non-complex type.
+
+    :param basetype: The actual data type
+    :param values: A set of possible values
+
+    If nullable, 'None' should be added the values set.
+
+    Example::
+
+        Gender = Enum(str, 'male', 'female')
+        Specie = Enum(str, 'cat', 'dog')
+
+    """
+    def __init__(self, basetype, *values, **kw):
+        self.basetype = basetype
+        self.values = set(values)
+        name = kw.pop('name', None)
+        if name is None:
+            name = "Enum(%s)" % ', '.join((str(v) for v in values))
+        self.name = name
+
+    def validate(self, value):
+        if value not in self.values:
+            raise ValueError("Value should be one of: %s" %
+                             ', '.join(map(str, self.values)))
+        return value
+
+    def tobasetype(self, value):
+        return value
+
+    def frombasetype(self, value):
+        return value
+
+
+class UnsetType(object):
+    def __bool__(self):
+        return False
+
+    def __repr__(self):
+        return 'Unset'
+
+
+Unset = UnsetType()
+
+
+def validate_value(datatype, value):
+    if value in (Unset, None):
+        return value
+
+    # Try to promote the data type to one of our complex types.
+    if isinstance(datatype, list):
+        datatype = ArrayType(datatype[0])
+    elif isinstance(datatype, dict):
+        datatype = DictType(*list(datatype.items())[0])
+
+    # If the datatype has its own validator, use that.
+    if hasattr(datatype, 'validate'):
+        return datatype.validate(value)
+
+    # Do type promotion/conversion and data validation for builtin
+    # types.
+    v_type = type(value)
+    if datatype == int:
+        if v_type in _promotable_types:
+            try:
+                # Try to turn the value into an int
+                value = datatype(value)
+            except ValueError:
+                # An error is raised at the end of the function
+                # when the types don't match.
+                pass
+    elif datatype is float and v_type in _promotable_types:
+        try:
+            value = float(value)
+        except ValueError:
+            # An error is raised at the end of the function
+            # when the types don't match.
+            pass
+    elif datatype is str and isinstance(value, bytes):
+        value = value.decode()
+    elif datatype is bytes and isinstance(value, str):
+        value = value.encode()
+
+    if not isinstance(value, datatype):
+        raise ValueError(
+            "Wrong type. Expected '%s', got '%s'" % (
+                datatype, v_type
+            ))
+    return value
+
+
+def iscomplex(datatype):
+    return inspect.isclass(datatype) \
+        and '_wsme_attributes' in datatype.__dict__
+
+
+class wsproperty(property):
+    """A specialised :class:`property` to define typed-property on complex types.
+
+    Example::
+
+        class MyComplexType(Base):
+            def get_aint(self):
+                return self._aint
+
+            def set_aint(self, value):
+                assert avalue < 10  # Dummy input validation
+                self._aint = value
+
+            aint = wsproperty(int, get_aint, set_aint, mandatory=True)
+
+    """
+    def __init__(self, datatype, fget, fset=None,
+                 mandatory=False, doc=None, name=None):
+        property.__init__(self, fget, fset)
+        #: The property name in the parent python class
+        self.key = None
+        #: The attribute name on the public of the api.
+        #: Defaults to :attr:`key`
+        self.name = name
+        #: property data type
+        self.datatype = datatype
+        #: True if the property is mandatory
+        self.mandatory = mandatory
+
+
+class wsattr(object):
+    """Complex type attribute definition.
+
+    Example::
+
+        class MyComplexType(ctypes.Base):
+            optionalvalue = int
+            mandatoryvalue = wsattr(int, mandatory=True)
+            named_value = wsattr(int, name='named.value')
+
+    After inspection, the non-wsattr attributes will be replaced, and
+    the above class will be equivalent to::
+
+        class MyComplexType(ctypes.Base):
+            optionalvalue = wsattr(int)
+            mandatoryvalue = wsattr(int, mandatory=True)
+
+    """
+    def __init__(self, datatype, mandatory=False, name=None, default=Unset,
+                 readonly=False):
+        #: The attribute name in the parent python class.
+        #: Set by :func:`inspect_class`
+        self.key = None  # will be set by class inspection
+        #: The attribute name on the public of the api.
+        #: Defaults to :attr:`key`
+        self.name = name
+        self._datatype = (datatype,)
+        #: True if the attribute is mandatory
+        self.mandatory = mandatory
+        #: Default value. The attribute will return this instead
+        #: of :data:`Unset` if no value has been set.
+        self.default = default
+        #: If True value cannot be set from json/xml input data
+        self.readonly = readonly
+
+        self.complextype = None
+
+    def _get_dataholder(self, instance):
+        dataholder = getattr(instance, '_wsme_dataholder', None)
+        if dataholder is None:
+            dataholder = instance._wsme_DataHolderClass()
+            instance._wsme_dataholder = dataholder
+        return dataholder
+
+    def __get__(self, instance, owner):
+        if instance is None:
+            return self
+        return getattr(
+            self._get_dataholder(instance),
+            self.key,
+            self.default
+        )
+
+    def __set__(self, instance, value):
+        try:
+            value = validate_value(self.datatype, value)
+        except (ValueError, TypeError) as e:
+            raise exception.InvalidInput(self.name, value, str(e))
+        dataholder = self._get_dataholder(instance)
+        if value is Unset:
+            if hasattr(dataholder, self.key):
+                delattr(dataholder, self.key)
+        else:
+            setattr(dataholder, self.key, value)
+
+    def __delete__(self, instance):
+        self.__set__(instance, Unset)
+
+    def _get_datatype(self):
+        if isinstance(self._datatype, tuple):
+            self._datatype = \
+                self.complextype().__registry__.resolve_type(self._datatype[0])
+        if isinstance(self._datatype, weakref.ref):
+            return self._datatype()
+        if isinstance(self._datatype, list):
+            return [
+                item() if isinstance(item, weakref.ref) else item
+                for item in self._datatype
+            ]
+        return self._datatype
+
+    def _set_datatype(self, datatype):
+        self._datatype = datatype
+
+    #: attribute data type. Can be either an actual type,
+    #: or a type name, in which case the actual type will be
+    #: determined when needed (generally just before scanning the api).
+    datatype = property(_get_datatype, _set_datatype)
+
+
+def iswsattr(attr):
+    if inspect.isfunction(attr) or inspect.ismethod(attr):
+        return False
+    if isinstance(attr, property) and not isinstance(attr, wsproperty):
+        return False
+    return True
+
+
+def sort_attributes(class_, attributes):
+    """Sort a class attributes list.
+
+    3 mechanisms are attempted :
+
+    #.  Look for a _wsme_attr_order attribute on the class. This allow
+        to define an arbitrary order of the attributes (useful for
+        generated types).
+
+    #.  Access the object source code to find the declaration order.
+
+    #.  Sort by alphabetically
+
+    """
+
+    if not len(attributes):
+        return
+
+    attrs = dict((a.key, a) for a in attributes)
+
+    if hasattr(class_, '_wsme_attr_order'):
+        names_order = class_._wsme_attr_order
+    else:
+        names = attrs.keys()
+        names_order = []
+        try:
+            lines = []
+            for cls in inspect.getmro(class_):
+                if cls is object:
+                    continue
+                lines[len(lines):] = inspect.getsourcelines(cls)[0]
+            for line in lines:
+                line = line.strip().replace(" ", "")
+                if '=' in line:
+                    aname = line[:line.index('=')]
+                    if aname in names and aname not in names_order:
+                        names_order.append(aname)
+            if len(names_order) < len(names):
+                names_order.extend((
+                    name for name in names if name not in names_order))
+            assert len(names_order) == len(names)
+        except (TypeError, IOError):
+            names_order = list(names)
+            names_order.sort()
+
+    attributes[:] = [attrs[name] for name in names_order]
+
+
+def inspect_class(class_):
+    """Extract a list of (name, wsattr|wsproperty) for the given class"""
+    attributes = []
+    for name, attr in inspect.getmembers(class_, iswsattr):
+        if name.startswith('_'):
+            continue
+        if inspect.isroutine(attr):
+            continue
+
+        if isinstance(attr, (wsattr, wsproperty)):
+            attrdef = attr
+        else:
+            if (attr not in native_types
+                and (inspect.isclass(attr) or isinstance(attr, (list, dict)))):
+                register_type(attr)
+            attrdef = getattr(class_, '__wsattrclass__', wsattr)(attr)
+
+        attrdef.key = name
+        if attrdef.name is None:
+            attrdef.name = name
+        attrdef.complextype = weakref.ref(class_)
+        attributes.append(attrdef)
+        setattr(class_, name, attrdef)
+
+    sort_attributes(class_, attributes)
+    return attributes
+
+
+def list_attributes(class_):
+    """Returns a list of a complex type attributes."""
+    if not iscomplex(class_):
+        raise TypeError("%s is not a registered type")
+    return class_._wsme_attributes
+
+
+def make_dataholder(class_):
+    # the slots are computed outside the class scope to avoid
+    # 'attr' to pullute the class namespace, which leads to weird
+    # things if one of the slots is named 'attr'.
+    slots = [attr.key for attr in class_._wsme_attributes]
+
+    class DataHolder(object):
+        __slots__ = slots
+
+    DataHolder.__name__ = class_.__name__ + 'DataHolder'
+    return DataHolder
+
+
+class Registry(object):
+    def __init__(self):
+        self._complex_types = []
+        self.array_types = set()
+        self.dict_types = set()
+
+    @property
+    def complex_types(self):
+        return [t() for t in self._complex_types if t()]
+
+    def register(self, class_):
+        """Make sure a type is registered.
+
+        It is automatically called by :class:`expose() <expose.expose>`
+        and :class:`validate() <expose.validate>`.
+        Unless you want to control when the class inspection is done there
+        is no need to call it.
+
+        """
+        if class_ is None or \
+                class_ in native_types or \
+                isinstance(class_, UserType) or iscomplex(class_) or \
+                isinstance(class_, ArrayType) or isinstance(class_, DictType):
+            return class_
+
+        if isinstance(class_, list):
+            if len(class_) != 1:
+                raise ValueError("Cannot register type %s" % repr(class_))
+            dt = ArrayType(class_[0])
+            self.register(dt.item_type)
+            self.array_types.add(dt)
+            return dt
+
+        if isinstance(class_, dict):
+            if len(class_) != 1:
+                raise ValueError("Cannot register type %s" % repr(class_))
+            dt = DictType(*list(class_.items())[0])
+            self.register(dt.value_type)
+            self.dict_types.add(dt)
+            return dt
+
+        class_._wsme_attributes = None
+        class_._wsme_attributes = inspect_class(class_)
+        class_._wsme_DataHolderClass = make_dataholder(class_)
+
+        class_.__registry__ = self
+        self._complex_types.append(weakref.ref(class_))
+        return class_
+
+    def reregister(self, class_):
+        """Register a type which may already have been registered.
+
+        """
+        self._unregister(class_)
+        return self.register(class_)
+
+    def _unregister(self, class_):
+        """Remove a previously registered type.
+
+        """
+        # Clear the existing attribute reference so it is rebuilt if
+        # the class is registered again later.
+        if hasattr(class_, '_wsme_attributes'):
+            del class_._wsme_attributes
+        # FIXME(dhellmann): This method does not recurse through the
+        # types like register() does. Should it?
+        if isinstance(class_, list):
+            at = ArrayType(class_[0])
+            try:
+                self.array_types.remove(at)
+            except KeyError:
+                pass
+        elif isinstance(class_, dict):
+            key_type, value_type = list(class_.items())[0]
+            self.dict_types = set(
+                dt for dt in self.dict_types
+                if (dt.key_type, dt.value_type) != (key_type, value_type)
+            )
+        # We can't use remove() here because the items in
+        # _complex_types are weakref objects pointing to the classes,
+        # so we can't compare with them directly.
+        self._complex_types = [
+            ct for ct in self._complex_types
+            if ct() is not class_
+        ]
+
+    def lookup(self, typename):
+        LOG.debug('Lookup %s', typename)
+        modname = None
+        if '.' in typename:
+            modname, typename = typename.rsplit('.', 1)
+        for ct in self._complex_types:
+            ct = ct()
+            if ct is not None and typename == ct.__name__ and (
+                    modname is None or modname == ct.__module__):
+                return ct
+
+    def resolve_type(self, type_):
+        if isinstance(type_, str):
+            return self.lookup(type_)
+        if isinstance(type_, list):
+            type_ = ArrayType(type_[0])
+        if isinstance(type_, dict):
+            type_ = DictType(list(type_.keys())[0], list(type_.values())[0])
+        if isinstance(type_, ArrayType):
+            type_ = ArrayType(self.resolve_type(type_.item_type))
+            self.array_types.add(type_)
+        elif isinstance(type_, DictType):
+            type_ = DictType(
+                type_.key_type,
+                self.resolve_type(type_.value_type)
+            )
+            self.dict_types.add(type_)
+        else:
+            type_ = self.register(type_)
+        return type_
+
+
+# Default type registry
+registry = Registry()
+
+
+def register_type(class_):
+    return registry.register(class_)
+
+
+class BaseMeta(type):
+    def __new__(cls, name, bases, dct):
+        if bases and bases[0] is not object and '__registry__' not in dct:
+            dct['__registry__'] = registry
+        return type.__new__(cls, name, bases, dct)
+
+    def __init__(cls, name, bases, dct):
+        if bases and bases[0] is not object and cls.__registry__:
+            cls.__registry__.register(cls)
+
+
+class Base(metaclass=BaseMeta):
+    """Base type for complex types"""
+    def __init__(self, **kw):
+        for key, value in kw.items():
+            if hasattr(self, key):
+                setattr(self, key, value)
+
+
+class File(Base):
+    """A complex type that represents a file.
+
+    In the particular case of protocol accepting form encoded data as
+    input, File can be loaded from a form file field.
+    """
+    #: The file name
+    filename = str
+
+    #: Mime type of the content
+    contenttype = str
+
+    def _get_content(self):
+        if self._content is None and self._file:
+            self._content = self._file.read()
+        return self._content
+
+    def _set_content(self, value):
+        self._content = value
+        self._file = None
+
+    #: File content
+    content = wsproperty(binary, _get_content, _set_content)
+
+    def __init__(self, filename=None, file=None, content=None,
+                 contenttype=None, fieldstorage=None):
+        self.filename = filename
+        self.contenttype = contenttype
+        self._file = file
+        self._content = content
+
+        if fieldstorage is not None:
+            if fieldstorage.file:
+                self._file = fieldstorage.file
+                self.filename = fieldstorage.filename
+                self.contenttype = str(fieldstorage.type)
+            else:
+                self._content = fieldstorage.value
+
+    @property
+    def file(self):
+        if self._file is None and self._content:
+            self._file = io.BytesIO(self._content)
+        return self._file
 
 
 class Response(object):
diff --git a/ironic/common/exception.py b/ironic/common/exception.py
index 7ce8ba8e7a..1ade17253b 100644
--- a/ironic/common/exception.py
+++ b/ironic/common/exception.py
@@ -20,7 +20,6 @@ from http import client as http_client
 
 from ironic_lib.exception import IronicException
 from oslo_log import log as logging
-import wsme
 
 from ironic.common.i18n import _
 
@@ -713,8 +712,21 @@ class IBMCConnectionError(IBMCError):
     _msg_fmt = _("IBMC connection failed for node %(node)s: %(error)s")
 
 
-class ClientSideError(wsme.exc.ClientSideError):
-    pass
+class ClientSideError(RuntimeError):
+    def __init__(self, msg=None, status_code=400, faultcode='Client'):
+        self.msg = msg
+        self.code = status_code
+        self.faultcode = faultcode
+        super(ClientSideError, self).__init__(self.faultstring)
+
+    @property
+    def faultstring(self):
+        if self.msg is None:
+            return str(self)
+        elif isinstance(self.msg, str):
+            return self.msg
+        else:
+            return str(self.msg)
 
 
 class NodeIsRetired(Invalid):
diff --git a/ironic/tests/unit/api/test_types.py b/ironic/tests/unit/api/test_types.py
new file mode 100644
index 0000000000..44c7291e85
--- /dev/null
+++ b/ironic/tests/unit/api/test_types.py
@@ -0,0 +1,628 @@
+# coding: utf-8
+#
+# Copyright 2011-2019 the WSME authors and contributors
+# (See https://opendev.org/x/wsme/)
+#
+# This module is part of WSME and is also released under
+# the MIT License: http://www.opensource.org/licenses/mit-license.php
+#
+# 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.
+
+import re
+
+from ironic.api import types
+from ironic.common import exception as exc
+from ironic.tests import base as test_base
+
+
+def gen_class():
+    d = {}
+    exec('''class tmp(object): pass''', d)
+    return d['tmp']
+
+
+class TestTypes(test_base.TestCase):
+    def setUp(self):
+        super(TestTypes, self).setUp()
+        types.registry = types.Registry()
+
+    def test_default_usertype(self):
+        class MyType(types.UserType):
+            basetype = str
+
+        My = MyType()
+
+        assert My.validate('a') == 'a'
+        assert My.tobasetype('a') == 'a'
+        assert My.frombasetype('a') == 'a'
+
+    def test_unset(self):
+        u = types.Unset
+
+        assert not u
+
+    def test_flat_type(self):
+        class Flat(object):
+            aint = int
+            abytes = bytes
+            atext = str
+            afloat = float
+
+        types.register_type(Flat)
+
+        assert len(Flat._wsme_attributes) == 4
+        attrs = Flat._wsme_attributes
+        print(attrs)
+
+        assert attrs[0].key == 'aint'
+        assert attrs[0].name == 'aint'
+        assert isinstance(attrs[0], types.wsattr)
+        assert attrs[0].datatype == int
+        assert attrs[0].mandatory is False
+        assert attrs[1].key == 'abytes'
+        assert attrs[1].name == 'abytes'
+        assert attrs[2].key == 'atext'
+        assert attrs[2].name == 'atext'
+        assert attrs[3].key == 'afloat'
+        assert attrs[3].name == 'afloat'
+
+    def test_private_attr(self):
+        class WithPrivateAttrs(object):
+            _private = 12
+
+        types.register_type(WithPrivateAttrs)
+
+        assert len(WithPrivateAttrs._wsme_attributes) == 0
+
+    def test_attribute_order(self):
+        class ForcedOrder(object):
+            _wsme_attr_order = ('a2', 'a1', 'a3')
+            a1 = int
+            a2 = int
+            a3 = int
+
+        types.register_type(ForcedOrder)
+
+        print(ForcedOrder._wsme_attributes)
+        assert ForcedOrder._wsme_attributes[0].key == 'a2'
+        assert ForcedOrder._wsme_attributes[1].key == 'a1'
+        assert ForcedOrder._wsme_attributes[2].key == 'a3'
+
+        c = gen_class()
+        print(c)
+        types.register_type(c)
+        del c._wsme_attributes
+
+        c.a2 = int
+        c.a1 = int
+        c.a3 = int
+
+        types.register_type(c)
+
+        assert c._wsme_attributes[0].key == 'a1', c._wsme_attributes[0].key
+        assert c._wsme_attributes[1].key == 'a2'
+        assert c._wsme_attributes[2].key == 'a3'
+
+    def test_wsproperty(self):
+        class WithWSProp(object):
+            def __init__(self):
+                self._aint = 0
+
+            def get_aint(self):
+                return self._aint
+
+            def set_aint(self, value):
+                self._aint = value
+
+            aint = types.wsproperty(int, get_aint, set_aint, mandatory=True)
+
+        types.register_type(WithWSProp)
+
+        print(WithWSProp._wsme_attributes)
+        assert len(WithWSProp._wsme_attributes) == 1
+        a = WithWSProp._wsme_attributes[0]
+        assert a.key == 'aint'
+        assert a.datatype == int
+        assert a.mandatory
+
+        o = WithWSProp()
+        o.aint = 12
+
+        assert o.aint == 12
+
+    def test_nested(self):
+        class Inner(object):
+            aint = int
+
+        class Outer(object):
+            inner = Inner
+
+        types.register_type(Outer)
+
+        assert hasattr(Inner, '_wsme_attributes')
+        assert len(Inner._wsme_attributes) == 1
+
+    def test_inspect_with_inheritance(self):
+        class Parent(object):
+            parent_attribute = int
+
+        class Child(Parent):
+            child_attribute = int
+
+        types.register_type(Parent)
+        types.register_type(Child)
+
+        assert len(Child._wsme_attributes) == 2
+
+    def test_selfreftype(self):
+        class SelfRefType(object):
+            pass
+
+        SelfRefType.parent = SelfRefType
+
+        types.register_type(SelfRefType)
+
+    def test_inspect_with_property(self):
+        class AType(object):
+            @property
+            def test(self):
+                return 'test'
+
+        types.register_type(AType)
+
+        assert len(AType._wsme_attributes) == 0
+        assert AType().test == 'test'
+
+    def test_enum(self):
+        aenum = types.Enum(str, 'v1', 'v2')
+        assert aenum.basetype is str
+
+        class AType(object):
+            a = aenum
+
+        types.register_type(AType)
+
+        assert AType.a.datatype is aenum
+
+        obj = AType()
+        obj.a = 'v1'
+        assert obj.a == 'v1', repr(obj.a)
+
+        self.assertRaisesRegexp(exc.InvalidInput,
+                                "Invalid input for field/attribute a. \
+Value: 'v3'. Value should be one of: v., v.",
+                                setattr,
+                                obj,
+                                'a',
+                                'v3')
+
+    def test_attribute_validation(self):
+        class AType(object):
+            alist = [int]
+            aint = int
+
+        types.register_type(AType)
+
+        obj = AType()
+
+        obj.alist = [1, 2, 3]
+        assert obj.alist == [1, 2, 3]
+        obj.aint = 5
+        assert obj.aint == 5
+
+        self.assertRaises(exc.InvalidInput, setattr, obj, 'alist', 12)
+        self.assertRaises(exc.InvalidInput, setattr, obj, 'alist', [2, 'a'])
+
+    def test_attribute_validation_minimum(self):
+        class ATypeInt(object):
+            attr = types.IntegerType(minimum=1, maximum=5)
+
+        types.register_type(ATypeInt)
+
+        obj = ATypeInt()
+        obj.attr = 2
+
+        # comparison between 'zero' value and intger minimum (1) raises a
+        # TypeError which must be wrapped into an InvalidInput exception
+        self.assertRaises(exc.InvalidInput, setattr, obj, 'attr', 'zero')
+
+    def test_text_attribute_conversion(self):
+        class SType(object):
+            atext = str
+            abytes = bytes
+
+        types.register_type(SType)
+
+        obj = SType()
+
+        obj.atext = b'somebytes'
+        assert obj.atext == 'somebytes'
+        assert isinstance(obj.atext, str)
+
+        obj.abytes = 'sometext'
+        assert obj.abytes == b'sometext'
+        assert isinstance(obj.abytes, bytes)
+
+    def test_named_attribute(self):
+        class ABCDType(object):
+            a_list = types.wsattr([int], name='a.list')
+            astr = str
+
+        types.register_type(ABCDType)
+
+        assert len(ABCDType._wsme_attributes) == 2
+        attrs = ABCDType._wsme_attributes
+
+        assert attrs[0].key == 'a_list', attrs[0].key
+        assert attrs[0].name == 'a.list', attrs[0].name
+        assert attrs[1].key == 'astr', attrs[1].key
+        assert attrs[1].name == 'astr', attrs[1].name
+
+    def test_wsattr_del(self):
+        class MyType(object):
+            a = types.wsattr(int)
+
+        types.register_type(MyType)
+
+        value = MyType()
+
+        value.a = 5
+        assert value.a == 5
+        del value.a
+        assert value.a is types.Unset
+
+    def test_validate_dict(self):
+        assert types.validate_value({int: str}, {1: '1', 5: '5'})
+
+        self.assertRaises(ValueError, types.validate_value,
+                          {int: str}, [])
+
+        assert types.validate_value({int: str}, {'1': '1', 5: '5'})
+
+        self.assertRaises(ValueError, types.validate_value,
+                          {int: str}, {1: 1, 5: '5'})
+
+    def test_validate_list_valid(self):
+        assert types.validate_value([int], [1, 2])
+        assert types.validate_value([int], ['5'])
+
+    def test_validate_list_empty(self):
+        assert types.validate_value([int], []) == []
+
+    def test_validate_list_none(self):
+        v = types.ArrayType(int)
+        assert v.validate(None) is None
+
+    def test_validate_list_invalid_member(self):
+        self.assertRaises(ValueError, types.validate_value, [int],
+                          ['not-a-number'])
+
+    def test_validate_list_invalid_type(self):
+        self.assertRaises(ValueError, types.validate_value, [int], 1)
+
+    def test_validate_float(self):
+        self.assertEqual(types.validate_value(float, 1), 1.0)
+        self.assertEqual(types.validate_value(float, '1'), 1.0)
+        self.assertEqual(types.validate_value(float, 1.1), 1.1)
+        self.assertRaises(ValueError, types.validate_value, float, [])
+        self.assertRaises(ValueError, types.validate_value, float,
+                          'not-a-float')
+
+    def test_validate_int(self):
+        self.assertEqual(types.validate_value(int, 1), 1)
+        self.assertEqual(types.validate_value(int, '1'), 1)
+        self.assertRaises(ValueError, types.validate_value, int, 1.1)
+
+    def test_validate_integer_type(self):
+        v = types.IntegerType(minimum=1, maximum=10)
+        v.validate(1)
+        v.validate(5)
+        v.validate(10)
+        self.assertRaises(ValueError, v.validate, 0)
+        self.assertRaises(ValueError, v.validate, 11)
+
+    def test_validate_string_type(self):
+        v = types.StringType(min_length=1, max_length=10,
+                             pattern='^[a-zA-Z0-9]*$')
+        v.validate('1')
+        v.validate('12345')
+        v.validate('1234567890')
+        self.assertRaises(ValueError, v.validate, '')
+        self.assertRaises(ValueError, v.validate, '12345678901')
+
+        # Test a pattern validation
+        v.validate('a')
+        v.validate('A')
+        self.assertRaises(ValueError, v.validate, '_')
+
+    def test_validate_string_type_precompile(self):
+        precompile = re.compile('^[a-zA-Z0-9]*$')
+        v = types.StringType(min_length=1, max_length=10,
+                             pattern=precompile)
+
+        # Test a pattern validation
+        v.validate('a')
+        v.validate('A')
+        self.assertRaises(ValueError, v.validate, '_')
+
+    def test_validate_string_type_pattern_exception_message(self):
+        regex = '^[a-zA-Z0-9]*$'
+        v = types.StringType(pattern=regex)
+        try:
+            v.validate('_')
+            self.assertFail()
+        except ValueError as e:
+            self.assertIn(regex, str(e))
+
+    def test_register_invalid_array(self):
+        self.assertRaises(ValueError, types.register_type, [])
+        self.assertRaises(ValueError, types.register_type, [int, str])
+        self.assertRaises(AttributeError, types.register_type, [1])
+
+    def test_register_invalid_dict(self):
+        self.assertRaises(ValueError, types.register_type, {})
+        self.assertRaises(ValueError, types.register_type,
+                          {int: str, str: int})
+        self.assertRaises(ValueError, types.register_type,
+                          {types.Unset: str})
+
+    def test_list_attribute_no_auto_register(self):
+        class MyType(object):
+            aint = int
+
+        assert not hasattr(MyType, '_wsme_attributes')
+
+        self.assertRaises(TypeError, types.list_attributes, MyType)
+
+        assert not hasattr(MyType, '_wsme_attributes')
+
+    def test_list_of_complextypes(self):
+        class A(object):
+            bs = types.wsattr(['B'])
+
+        class B(object):
+            i = int
+
+        types.register_type(A)
+        types.register_type(B)
+
+        assert A.bs.datatype.item_type is B
+
+    def test_cross_referenced_types(self):
+        class A(object):
+            b = types.wsattr('B')
+
+        class B(object):
+            a = A
+
+        types.register_type(A)
+        types.register_type(B)
+
+        assert A.b.datatype is B
+
+    def test_base(self):
+        class B1(types.Base):
+            b2 = types.wsattr('B2')
+
+        class B2(types.Base):
+            b2 = types.wsattr('B2')
+
+        assert B1.b2.datatype is B2, repr(B1.b2.datatype)
+        assert B2.b2.datatype is B2
+
+    def test_base_init(self):
+        class C1(types.Base):
+            s = str
+
+        c = C1(s='test')
+        assert c.s == 'test'
+
+    def test_array_eq(self):
+        ell = [types.ArrayType(str)]
+        assert types.ArrayType(str) in ell
+
+    def test_array_sample(self):
+        s = types.ArrayType(str).sample()
+        assert isinstance(s, list)
+        assert s
+        assert s[0] == ''
+
+    def test_dict_sample(self):
+        s = types.DictType(str, str).sample()
+        assert isinstance(s, dict)
+        assert s
+        assert s == {'': ''}
+
+    def test_binary_to_base(self):
+        import base64
+        assert types.binary.tobasetype(None) is None
+        expected = base64.encodestring(b'abcdef')
+        assert types.binary.tobasetype(b'abcdef') == expected
+
+    def test_binary_from_base(self):
+        import base64
+        assert types.binary.frombasetype(None) is None
+        encoded = base64.encodestring(b'abcdef')
+        assert types.binary.frombasetype(encoded) == b'abcdef'
+
+    def test_wsattr_weakref_datatype(self):
+        # If the datatype inside the wsattr ends up a weakref, it
+        # should be converted to the real type when accessed again by
+        # the property getter.
+        import weakref
+        a = types.wsattr(int)
+        a.datatype = weakref.ref(int)
+        assert a.datatype is int
+
+    def test_wsattr_list_datatype(self):
+        # If the datatype inside the wsattr ends up a list of weakrefs
+        # to types, it should be converted to the real types when
+        # accessed again by the property getter.
+        import weakref
+        a = types.wsattr(int)
+        a.datatype = [weakref.ref(int)]
+        assert isinstance(a.datatype, list)
+        assert a.datatype[0] is int
+
+    def test_file_get_content_by_reading(self):
+        class buffer:
+            def read(self):
+                return 'abcdef'
+        f = types.File(file=buffer())
+        assert f.content == 'abcdef'
+
+    def test_file_content_overrides_file(self):
+        class buffer:
+            def read(self):
+                return 'from-file'
+        f = types.File(content='from-content', file=buffer())
+        assert f.content == 'from-content'
+
+    def test_file_setting_content_discards_file(self):
+        class buffer:
+            def read(self):
+                return 'from-file'
+        f = types.File(file=buffer())
+        f.content = 'from-content'
+        assert f.content == 'from-content'
+
+    def test_file_field_storage(self):
+        class buffer:
+            def read(self):
+                return 'from-file'
+
+        class fieldstorage:
+            filename = 'static.json'
+            file = buffer()
+            type = 'application/json'
+        f = types.File(fieldstorage=fieldstorage)
+        assert f.content == 'from-file'
+
+    def test_file_field_storage_value(self):
+        class buffer:
+            def read(self):
+                return 'from-file'
+
+        class fieldstorage:
+            filename = 'static.json'
+            file = None
+            type = 'application/json'
+            value = 'from-value'
+        f = types.File(fieldstorage=fieldstorage)
+        assert f.content == 'from-value'
+
+    def test_file_property_file(self):
+        class buffer:
+            def read(self):
+                return 'from-file'
+        buf = buffer()
+        f = types.File(file=buf)
+        assert f.file is buf
+
+    def test_file_property_content(self):
+        class buffer:
+            def read(self):
+                return 'from-file'
+        f = types.File(content=b'from-content')
+        assert f.file.read() == b'from-content'
+
+    def test_unregister(self):
+        class TempType(object):
+            pass
+        types.registry.register(TempType)
+        v = types.registry.lookup('TempType')
+        self.assertIs(v, TempType)
+        types.registry._unregister(TempType)
+        after = types.registry.lookup('TempType')
+        self.assertIsNone(after)
+
+    def test_unregister_twice(self):
+        class TempType(object):
+            pass
+        types.registry.register(TempType)
+        v = types.registry.lookup('TempType')
+        self.assertIs(v, TempType)
+        types.registry._unregister(TempType)
+        # Second call should not raise an exception
+        types.registry._unregister(TempType)
+        after = types.registry.lookup('TempType')
+        self.assertIsNone(after)
+
+    def test_unregister_array_type(self):
+        class TempType(object):
+            pass
+        t = [TempType]
+        types.registry.register(t)
+        self.assertNotEqual(types.registry.array_types, set())
+        types.registry._unregister(t)
+        self.assertEqual(types.registry.array_types, set())
+
+    def test_unregister_array_type_twice(self):
+        class TempType(object):
+            pass
+        t = [TempType]
+        types.registry.register(t)
+        self.assertNotEqual(types.registry.array_types, set())
+        types.registry._unregister(t)
+        # Second call should not raise an exception
+        types.registry._unregister(t)
+        self.assertEqual(types.registry.array_types, set())
+
+    def test_unregister_dict_type(self):
+        class TempType(object):
+            pass
+        t = {str: TempType}
+        types.registry.register(t)
+        self.assertNotEqual(types.registry.dict_types, set())
+        types.registry._unregister(t)
+        self.assertEqual(types.registry.dict_types, set())
+
+    def test_unregister_dict_type_twice(self):
+        class TempType(object):
+            pass
+        t = {str: TempType}
+        types.registry.register(t)
+        self.assertNotEqual(types.registry.dict_types, set())
+        types.registry._unregister(t)
+        # Second call should not raise an exception
+        types.registry._unregister(t)
+        self.assertEqual(types.registry.dict_types, set())
+
+    def test_reregister(self):
+        class TempType(object):
+            pass
+        types.registry.register(TempType)
+        v = types.registry.lookup('TempType')
+        self.assertIs(v, TempType)
+        types.registry.reregister(TempType)
+        after = types.registry.lookup('TempType')
+        self.assertIs(after, TempType)
+
+    def test_reregister_and_add_attr(self):
+        class TempType(object):
+            pass
+        types.registry.register(TempType)
+        attrs = types.list_attributes(TempType)
+        self.assertEqual(attrs, [])
+        TempType.one = str
+        types.registry.reregister(TempType)
+        after = types.list_attributes(TempType)
+        self.assertNotEqual(after, [])
+
+    def test_non_registered_complex_type(self):
+        class TempType(types.Base):
+            __registry__ = None
+
+        self.assertFalse(types.iscomplex(TempType))
+        types.registry.register(TempType)
+        self.assertTrue(types.iscomplex(TempType))
diff --git a/requirements.txt b/requirements.txt
index 9a59e67777..aa80cd787e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,6 @@ pecan!=1.0.2,!=1.0.3,!=1.0.4,!=1.2,>=1.0.0 # BSD
 requests>=2.14.2 # Apache-2.0
 rfc3986>=0.3.1 # Apache-2.0
 jsonpatch!=1.20,>=1.16 # BSD
-WSME>=0.9.3 # MIT
 Jinja2>=2.10 # BSD License (3 clause)
 keystonemiddleware>=4.17.0 # Apache-2.0
 oslo.messaging>=5.29.0 # Apache-2.0