diff --git a/releasenotes/notes/validations-in-workflows-021f93404f3a222e.yaml b/releasenotes/notes/validations-in-workflows-021f93404f3a222e.yaml
new file mode 100644
index 000000000..c2c396040
--- /dev/null
+++ b/releasenotes/notes/validations-in-workflows-021f93404f3a222e.yaml
@@ -0,0 +1,9 @@
+---
+features:
+  - Pre-deployment checks are now being called in a
+    workflow. This simplifies the client, and removes
+    code that does not need to be in the client.
+fixes:
+  - Fixes `bug 1638697
+    <https://bugs.launchpad.net/tripleo/+bug/1638607>`__ Moves the
+    pre-deployment checks to workflows.
diff --git a/tripleoclient/tests/v1/overcloud_deploy/test_overcloud_deploy.py b/tripleoclient/tests/v1/overcloud_deploy/test_overcloud_deploy.py
index 52ae69a17..b85d02282 100644
--- a/tripleoclient/tests/v1/overcloud_deploy/test_overcloud_deploy.py
+++ b/tripleoclient/tests/v1/overcloud_deploy/test_overcloud_deploy.py
@@ -876,37 +876,6 @@ class TestDeployOvercloud(fakes.TestDeployOvercloud):
 
         mock_create_tempest_deployer_input.assert_called_with()
 
-    @mock.patch('tripleoclient.utils.check_nodes_count')
-    @mock.patch('tripleoclient.utils.check_hypervisor_stats')
-    @mock.patch('tripleoclient.utils.assign_and_verify_profiles')
-    @mock.patch('tripleoclient.v1.overcloud_deploy.DeployOvercloud.'
-                '_get_default_role_counts')
-    @mock.patch('tripleoclient.v1.overcloud_deploy.DeployOvercloud.'
-                '_check_ironic_boot_configuration')
-    @mock.patch('tripleoclient.v1.overcloud_deploy.DeployOvercloud.'
-                '_collect_flavors')
-    def test_predeploy_verify_capabilities_hypervisor_stats(
-            self, mock_collect_flavors,
-            mock_check_ironic_boot_configuration,
-            mock_get_default_role_counts,
-            mock_assign_and_verify_profiles,
-            mock_check_hypervisor_stats,
-            mock_check_nodes_count):
-        self.cmd._predeploy_verify_capabilities = \
-            self.real_predeploy_verify_capabilities
-
-        stack = None
-        parameters = {}
-        parsed_args = mock.Mock()
-        mock_assign_and_verify_profiles.return_value = (0, 0)
-        mock_check_nodes_count.return_value = (True, 0, 0)
-
-        # A None return value here indicates an error
-        mock_check_hypervisor_stats.return_value = None
-        self.cmd._predeploy_verify_capabilities(
-            stack, parameters, parsed_args)
-        self.assertEqual(1, self.cmd.predeploy_errors)
-
     def test_get_default_role_counts_defaults(self):
         parsed_args = mock.Mock()
         parsed_args.roles_file = None
diff --git a/tripleoclient/tests/v1/overcloud_deploy/test_overcloud_deploy_validators.py b/tripleoclient/tests/v1/overcloud_deploy/test_overcloud_deploy_validators.py
deleted file mode 100644
index 14f1f9c97..000000000
--- a/tripleoclient/tests/v1/overcloud_deploy/test_overcloud_deploy_validators.py
+++ /dev/null
@@ -1,250 +0,0 @@
-#   Copyright 2015 Red Hat, Inc.
-#
-#   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 mock
-from uuid import uuid4
-
-from osc_lib.tests import utils
-
-from tripleoclient.tests.v1.overcloud_deploy import fakes
-from tripleoclient.v1 import overcloud_deploy
-
-
-class TestDeployValidators(fakes.TestDeployOvercloud):
-    def setUp(self):
-        super(TestDeployValidators, self).setUp()
-
-        # Get the command object to test
-        self.cmd = overcloud_deploy.DeployOvercloud(self.app, None)
-
-    @mock.patch('tripleoclient.v1.overcloud_deploy.DeployOvercloud.'
-                '_check_node_boot_configuration')
-    def test_ironic_boot_checks(self, mock_node_boot_check):
-        class FakeNode(object):
-            uuid = None
-
-            def __init__(self, uuid):
-                self.uuid = uuid
-
-        bm_client = self.app.client_manager.baremetal
-        mock_node = mock.Mock()
-        bm_client.attach_mock(mock_node, 'node')
-
-        fake_nodes = [FakeNode(uuid) for uuid in (
-            '97dd6459-cf2d-4eea-865e-84fee3bf5e6d',
-            '1867d71b-d0a5-44c6-b83e-ada8b16de556'
-        )]
-        # return a list of FakeNodes, replaces bm_client.node.list
-        mock_maint_nodes = mock.Mock(return_value=fake_nodes)
-        mock_node.attach_mock(mock_maint_nodes, 'list')
-
-        # get a FakeNode by its UUID, replaces bm_client.node.get
-
-        self.cmd.baremetal_client = bm_client
-        self.cmd._check_ironic_boot_configuration()
-
-        mock_maint_nodes.assert_called_once_with(detail=True,
-                                                 maintenance=False)
-
-    def test_image_ids(self):
-        image_client = self.app.client_manager.image
-        image_client.images = {}
-        image_ids = self.cmd._image_ids()
-
-        image_client.images = {
-            'bm-deploy-kernel':
-            mock.Mock(id='fb7a98fb-acb9-43ec-9b93-525d1286f9d8'),
-            'bm-deploy-ramdisk':
-            mock.Mock(id='8558de2e-1b72-4654-8ba9-cceb89e9194e'),
-        }
-
-        image_ids = self.cmd._image_ids()
-        self.assertEqual(image_ids, ('fb7a98fb-acb9-43ec-9b93-525d1286f9d8',
-                                     '8558de2e-1b72-4654-8ba9-cceb89e9194e'))
-
-    @mock.patch('tripleoclient.v1.overcloud_deploy.DeployOvercloud.'
-                '_image_ids',
-                return_value=('fb7a98fb-acb9-43ec-9b93-525d1286f9d8',
-                              '8558de2e-1b72-4654-8ba9-cceb89e9194e'))
-    def test_node_boot_checks(self, mock_image_ids):
-        class FakeNode(object):
-            uuid = 'fake-node-123'
-            driver_info = None
-            properties = None
-
-        node = FakeNode()
-        node.driver_info = {
-            'deploy_kernel': 'fb7a98fb-acb9-43ec-9b93-525d1286f9d8',
-            'deploy_ramdisk': '8558de2e-1b72-4654-8ba9-cceb89e9194e',
-        }
-        node.properties = {
-            'capabilities': 'boot_option:local,profile:foobar'
-        }
-        self.cmd._check_node_boot_configuration(node)
-        self.assertEqual(self.cmd.predeploy_errors, 0)
-        self.assertEqual(self.cmd.predeploy_warnings, 0)
-
-        node.properties['capabilities'] = 'profile:foobar'
-        self.cmd._check_node_boot_configuration(node)
-        self.assertEqual(self.cmd.predeploy_errors, 0)
-        self.assertEqual(self.cmd.predeploy_warnings, 1)
-
-        node.properties['capabilities'] = 'profile:foobar,boot_option:local'
-        node.driver_info.pop('deploy_kernel')
-        self.cmd._check_node_boot_configuration(node)
-        self.assertEqual(self.cmd.predeploy_errors, 1)
-        self.assertEqual(self.cmd.predeploy_warnings, 1)
-
-    @mock.patch('tripleoclient.v1.overcloud_deploy.DeployOvercloud.'
-                '_image_ids',
-                return_value=('fb7a98fb-acb9-43ec-9b93-525d1286f9d8',
-                              '8558de2e-1b72-4654-8ba9-cceb89e9194e'))
-    def test_boot_image_checks(self, mock_image_ids):
-        self.cmd._check_boot_images()
-        self.assertEqual(self.cmd.predeploy_errors, 0)
-        self.assertEqual(self.cmd.predeploy_warnings, 0)
-
-        mock_image_ids.return_value = (
-            None, '8558de2e-1b72-4654-8ba9-cceb89e9194e')
-        self.cmd._check_boot_images()
-        self.assertEqual(self.cmd.predeploy_errors, 1)
-        self.assertEqual(self.cmd.predeploy_warnings, 0)
-
-        mock_image_ids.return_value = (
-            '8558de2e-1b72-4654-8ba9-cceb89e9194e', None)
-        self.cmd._check_boot_images()
-        self.assertEqual(self.cmd.predeploy_errors, 2)
-        self.assertEqual(self.cmd.predeploy_warnings, 0)
-
-
-class FakeFlavor(object):
-    name = ''
-    uuid = ''
-
-    def __init__(self, name):
-        self.uuid = uuid4()
-        self.name = name
-
-    def get_keys(self):
-        return {'capabilities:boot_option': 'local'}
-
-
-class TestCollectFlavors(fakes.TestDeployOvercloud):
-    def setUp(self):
-        super(TestCollectFlavors, self).setUp()
-        self.cmd = overcloud_deploy.DeployOvercloud(self.app, None)
-        self.arglist = [
-            '--block-storage-flavor', 'block',
-            '--block-storage-scale', '3',
-            '--ceph-storage-flavor', 'ceph',
-            '--ceph-storage-scale', '0',
-            '--compute-flavor', 'compute',
-            '--compute-scale', '3',
-            '--control-flavor', 'control',
-            '--control-scale', '1',
-            '--swift-storage-flavor', 'swift',
-            '--swift-storage-scale', '2',
-            '--templates'
-        ]
-        self.verifylist = [
-            ('templates', '/usr/share/openstack-tripleo-heat-templates/'),
-        ]
-
-        self.mock_flavors = mock.Mock()
-        self.app.client_manager.compute.attach_mock(self.mock_flavors,
-                                                    'flavors')
-
-    def test_ok(self):
-        parsed_args = self.check_parser(self.cmd, self.arglist,
-                                        self.verifylist)
-
-        expected_result = {
-            'block': (FakeFlavor('block'), 3),
-            'compute': (FakeFlavor('compute'), 3),
-            'control': (FakeFlavor('control'), 1),
-            'swift': (FakeFlavor('swift'), 2)
-        }
-        mock_flavor_list = mock.Mock(
-            return_value=[
-                flavor for flavor, scale in expected_result.values()
-            ]
-        )
-        self.mock_flavors.attach_mock(mock_flavor_list, 'list')
-
-        result = self.cmd._collect_flavors(parsed_args)
-        self.assertEqual(self.cmd.predeploy_errors, 0)
-        self.assertEqual(self.cmd.predeploy_warnings, 0)
-        self.assertEqual(expected_result, result)
-
-    def test_flavor_not_found(self):
-        parsed_args = self.check_parser(self.cmd, self.arglist,
-                                        self.verifylist)
-
-        expected_result = {
-            'block': (FakeFlavor('block'), 3),
-            'compute': (FakeFlavor('compute'), 3),
-            'control': (FakeFlavor('control'), 1),
-        }
-        mock_flavor_list = mock.Mock(
-            return_value=[
-                flavor for flavor, scale in expected_result.values()
-            ]
-        )
-        self.mock_flavors.attach_mock(mock_flavor_list, 'list')
-        result = self.cmd._collect_flavors(parsed_args)
-        self.assertEqual(self.cmd.predeploy_errors, 1)
-        self.assertEqual(self.cmd.predeploy_warnings, 0)
-        self.assertEqual(expected_result, result)
-
-    def test_same_flavor(self):
-        self.arglist = [
-            '--compute-flavor', 'baremetal',
-            '--compute-scale', '3',
-            '--control-flavor', 'baremetal',
-            '--control-scale', '1',
-            '--templates'
-        ]
-        parsed_args = self.check_parser(self.cmd, self.arglist,
-                                        self.verifylist)
-
-        expected_result = {
-            'baremetal': (FakeFlavor('baremetal'), 4),
-        }
-        mock_flavor_list = mock.Mock(
-            return_value=[
-                flavor for flavor, scale in expected_result.values()
-            ]
-        )
-        self.mock_flavors.attach_mock(mock_flavor_list, 'list')
-
-        result = self.cmd._collect_flavors(parsed_args)
-        self.assertEqual(self.cmd.predeploy_errors, 0)
-        self.assertEqual(self.cmd.predeploy_warnings, 0)
-        self.assertEqual(expected_result, result)
-
-    def test_error_default(self):
-        self.check_parser(self.cmd, ['--templates'],
-                          [('validation_errors_fatal', True)])
-
-    def test_error_nonfatal(self):
-        self.check_parser(self.cmd,
-                          ['--templates', '--validation-errors-nonfatal'],
-                          [('validation_errors_fatal', False)])
-
-    def test_error_exclusive(self):
-        self.assertRaises(utils.ParserException,
-                          self.check_parser, self.cmd,
-                          ['--templates', '--validation-errors-nonfatal',
-                           '--validation-errors-fatal'], [])
diff --git a/tripleoclient/v1/overcloud_deploy.py b/tripleoclient/v1/overcloud_deploy.py
index 7aa5cf2d6..00e296781 100644
--- a/tripleoclient/v1/overcloud_deploy.py
+++ b/tripleoclient/v1/overcloud_deploy.py
@@ -32,7 +32,6 @@ from heatclient import exc as hc_exc
 from osc_lib.command import command
 from osc_lib import exceptions as oscexc
 from osc_lib.i18n import _
-from osc_lib import utils as osc_utils
 from swiftclient.exceptions import ClientException
 from tripleo_common import update
 
@@ -42,6 +41,7 @@ from tripleoclient import utils
 from tripleoclient.workflows import deployment
 from tripleoclient.workflows import parameters as workflow_params
 from tripleoclient.workflows import plan_management
+from tripleoclient.workflows import validations
 
 
 class DeployOvercloud(command.Command):
@@ -607,177 +607,27 @@ class DeployOvercloud(command.Command):
         self.predeploy_warnings = 0
         self.log.debug("Starting _pre_verify_capabilities")
 
-        self._check_boot_images()
+        validation_params = {
+            'deploy_kernel_name': 'bm-deploy-kernel',
+            'deploy_ramdisk_name': 'bm-deploy-ramdisk',
+            'roles_info': utils.get_roles_info(parsed_args),
+            'stack_id': parsed_args.stack,
+            'parameters': parameters,
+            'default_role_counts': self._get_default_role_counts(parsed_args),
+            'run_validations': True,
+            'queue_name': str(uuid.uuid4()),
+        }
 
-        flavors = self._collect_flavors(parsed_args)
-
-        self._check_ironic_boot_configuration()
-
-        errors, warnings = utils.assign_and_verify_profiles(
-            self.baremetal_client, flavors,
-            assign_profiles=False,
-            dry_run=parsed_args.dry_run
+        errors, warnings = validations.check_predeployment_validations(
+            self.app.client_manager,
+            **validation_params
         )
+
         self.predeploy_errors += errors
         self.predeploy_warnings += warnings
 
-        self.log.debug("Checking hypervisor stats")
-        if utils.check_hypervisor_stats(self.compute_client) is None:
-            self.log.error("Expected hypervisor stats not met")
-            self.predeploy_errors += 1
-
-        self.log.debug("Checking nodes count")
-        default_role_counts = self._get_default_role_counts(parsed_args)
-        enough_nodes, count, ironic_nodes_count = utils.check_nodes_count(
-            self.baremetal_client,
-            stack,
-            parameters,
-            default_role_counts
-        )
-        if not enough_nodes:
-            self.log.error(
-                "Not enough nodes - available: {0}, requested: {1}".format(
-                    ironic_nodes_count, count))
-            self.predeploy_errors += 1
-
         return self.predeploy_errors, self.predeploy_warnings
 
-    __kernel_id = None
-    __ramdisk_id = None
-
-    def _image_ids(self):
-        if self.__kernel_id is not None and self.__ramdisk_id is not None:
-            return self.__kernel_id, self.__ramdisk_id
-
-        kernel_id, ramdisk_id = None, None
-        try:
-            kernel_id = osc_utils.find_resource(
-                self.image_client.images, 'bm-deploy-kernel').id
-        except AttributeError:
-            self.log.exception("Please make sure there is only one image "
-                               "named 'bm-deploy-kernel' in glance.")
-        except oscexc.CommandError:
-            # kernel_id=None will be returned and an error will be logged from
-            # self._check_boot_images
-            pass
-
-        try:
-            ramdisk_id = osc_utils.find_resource(
-                self.image_client.images, 'bm-deploy-ramdisk').id
-        except AttributeError:
-            self.log.exception("Please make sure there is only one image "
-                               "named 'bm-deploy-ramdisk' in glance.")
-        except oscexc.CommandError:
-            # ramdisk_id=None will be returned and an error will be logged from
-            # self._check_boot_images
-            pass
-
-        self.log.debug("Using kernel ID: {0} and ramdisk ID: {1}".format(
-            kernel_id, ramdisk_id))
-
-        self.__kernel_id = kernel_id
-        self.__ramdisk_id = ramdisk_id
-        return kernel_id, ramdisk_id
-
-    def _check_boot_images(self):
-        kernel_id, ramdisk_id = self._image_ids()
-        message = ("No image with the name '{}' found - make "
-                   "sure you've uploaded boot images")
-        if kernel_id is None:
-            self.predeploy_errors += 1
-            self.log.error(message.format('bm-deploy-kernel'))
-        if ramdisk_id is None:
-            self.predeploy_errors += 1
-            self.log.error(message.format('bm-deploy-ramdisk'))
-
-    def _collect_flavors(self, parsed_args):
-        """Validate and collect nova flavors in use.
-
-        Ensure that selected flavors (--ROLE-flavor) are valid in nova.
-        Issue a warning of local boot is not set for a flavor.
-
-        :returns: dictionary flavor name -> (flavor object, scale)
-        """
-        flavors = {f.name: f for f in self.compute_client.flavors.list()}
-        result = {}
-
-        message = "Provided --{}-flavor, '{}', does not exist"
-
-        for target, (flavor_name, scale) in (
-            utils.get_roles_info(parsed_args).items()
-        ):
-            if flavor_name is None or not scale:
-                self.log.debug("--{}-flavor not used".format(target))
-                continue
-
-            try:
-                flavor, old_scale = result[flavor_name]
-            except KeyError:
-                pass
-            else:
-                result[flavor_name] = (flavor, old_scale + scale)
-                continue
-
-            try:
-                flavor = flavors[flavor_name]
-            except KeyError:
-                self.predeploy_errors += 1
-                self.log.error(message.format(target, flavor_name))
-                continue
-
-            if flavor.get_keys().get('capabilities:boot_option', '') \
-                    != 'local':
-                self.predeploy_warnings += 1
-                self.log.warning(
-                    'Flavor %s "capabilities:boot_option" is not set to '
-                    '"local". Nodes must have ability to PXE boot from '
-                    'deploy image.', flavor_name)
-                self.log.warning(
-                    'Recommended solution: openstack flavor set --property '
-                    '"cpu_arch"="x86_64" --property '
-                    '"capabilities:boot_option"="local" ' + flavor_name)
-
-            result[flavor_name] = (flavor, scale)
-
-        return result
-
-    def _check_ironic_boot_configuration(self):
-        for node in self.baremetal_client.node.list(detail=True,
-                                                    maintenance=False):
-            self.log.debug("Checking config for Node {0}".format(node.uuid))
-            self._check_node_boot_configuration(node)
-
-    def _check_node_boot_configuration(self, node):
-        kernel_id, ramdisk_id = self._image_ids()
-        self.log.debug("Doing boot checks for {}".format(node.uuid))
-        message = ("Node uuid={uuid} has an incorrectly configured "
-                   "{property}. Expected \"{expected}\" but got "
-                   "\"{actual}\".")
-        if node.driver_info.get('deploy_ramdisk') != ramdisk_id:
-            self.predeploy_errors += 1
-            self.log.error(message.format(
-                uuid=node.uuid,
-                property='driver_info/deploy_ramdisk',
-                expected=ramdisk_id,
-                actual=node.driver_info.get('deploy_ramdisk')
-            ))
-        if node.driver_info.get('deploy_kernel') != kernel_id:
-            self.predeploy_errors += 1
-            self.log.error(message.format(
-                uuid=node.uuid,
-                property='driver_info/deploy_kernel',
-                expected=kernel_id,
-                actual=node.driver_info.get('deploy_kernel')
-            ))
-        if 'boot_option:local' not in node.properties.get('capabilities', ''):
-            self.predeploy_warnings += 1
-            self.log.warning(message.format(
-                uuid=node.uuid,
-                property='properties/capabilities',
-                expected='boot_option:local',
-                actual=node.properties.get('capabilities')
-            ))
-
     def get_parser(self, prog_name):
         # add_help doesn't work properly, set it to False:
         parser = argparse.ArgumentParser(
diff --git a/tripleoclient/workflows/validations.py b/tripleoclient/workflows/validations.py
new file mode 100644
index 000000000..541c966e5
--- /dev/null
+++ b/tripleoclient/workflows/validations.py
@@ -0,0 +1,44 @@
+# 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.
+from tripleoclient.workflows import base
+
+
+def check_predeployment_validations(clients, **workflow_input):
+    workflow_client = clients.workflow_engine
+    tripleoclients = clients.tripleoclient
+    queue_name = workflow_input['queue_name']
+
+    execution = base.start_workflow(
+        workflow_client,
+        'tripleo.validations.v1.check_pre_deployment_validations',
+        workflow_input=workflow_input
+    )
+
+    errors = []
+    warnings = []
+    with tripleoclients.messaging_websocket(queue_name) as ws:
+        for payload in base.wait_for_messages(workflow_client, ws, execution):
+            if 'message' in payload:
+                print(payload['message'])
+            if 'errors' in payload:
+                errors += payload['errors']
+            if 'warnings' in payload:
+                warnings += payload['warnings']
+
+    if errors:
+        print('ERRORS')
+        print(errors)
+    if warnings:
+        print('WARNINGS')
+        print(warnings)
+
+    return len(errors), len(warnings)