diff --git a/tripleoclient/tests/test_utils.py b/tripleoclient/tests/test_utils.py
index 03ff7009e..76398ea19 100644
--- a/tripleoclient/tests/test_utils.py
+++ b/tripleoclient/tests/test_utils.py
@@ -792,6 +792,59 @@ class TestWaitForStackUtil(TestCase):
             utils.check_ceph_ansible(res_reg.get('resource_registry', {}),
                                      'DeployOvercloud')
 
+    def test_check_deployed_ceph_stage(self):
+
+        env = {
+            'resource_registry': {
+                'OS::Tripleo::Services::CephMon': '/path/cephadm/ceph-mon.yml',
+                'OS::TripleO::Services::CephMgr': '/path/cephadm/ceph-mgr.yml',
+                'OS::TripleO::Services::CephMon': '/path/cephadm/ceph-mon.yml',
+                'OS::TripleO::Services::CephOSD': '/path/cephadm/ceph-osd.yml',
+                'OS::TripleO::Services::CephMds': '/path/cephadm/ceph-mds.yml',
+                'OS::TripleO::Services::CephNfs': '/path/cephadm/ceph-nfs.yml',
+                'OS::TripleO::Services::CephRgw': '/path/cephadm/ceph-rgw.yml',
+            },
+            'parameter_defaults': {
+                'DeployedCeph': True
+            }
+        }
+
+        utils.check_deployed_ceph_stage(env)
+
+    def test_check_deployed_ceph_stage_fail(self):
+
+        env = {
+            'resource_registry': {
+                'OS::Tripleo::Services::CephMon': '/path/cephadm/ceph-mon.yml',
+                'OS::TripleO::Services::CephMgr': '/path/cephadm/ceph-mgr.yml',
+                'OS::TripleO::Services::CephMon': '/path/cephadm/ceph-mon.yml',
+                'OS::TripleO::Services::CephOSD': '/path/cephadm/ceph-osd.yml',
+                'OS::TripleO::Services::CephMds': '/path/cephadm/ceph-mds.yml',
+                'OS::TripleO::Services::CephNfs': '/path/cephadm/ceph-nfs.yml',
+                'OS::TripleO::Services::CephRgw': '/path/cephadm/ceph-rgw.yml',
+            },
+            'parameter_defaults': {
+                'DeployedCeph': False
+            }
+        }
+
+        with self.assertRaises(exceptions.InvalidConfiguration):
+            utils.check_deployed_ceph_stage(env)
+
+    def test_check_deployed_ceph_stage_external(self):
+
+        env = {
+            'resource_registry': {
+                'OS::Tripleo::Services::CephExternal': '/path/cephadm/ceph-client.yml',  # noqa E501
+            },
+            'parameter_defaults': {
+                'DeployedCeph': False
+            }
+        }
+
+        with self.assertRaises(exceptions.InvalidConfiguration):
+            utils.check_deployed_ceph_stage(env)
+
     def test_check_swift_and_rgw(self):
         stack_reg = {
             'OS::TripleO::Services::SwiftProxy': 'OS::Heat::None',
diff --git a/tripleoclient/utils.py b/tripleoclient/utils.py
index 7e31f879f..07039a673 100644
--- a/tripleoclient/utils.py
+++ b/tripleoclient/utils.py
@@ -1077,6 +1077,51 @@ def check_ceph_ansible(resource_registry, stage):
                                                   'file.')
 
 
+def check_deployed_ceph_stage(environment):
+    """Raises an exception if Ceph is being deployed without DeployedCeph:True.
+
+       If Ceph is not being deployed or DeployedCeph is true, then return
+       nothing, so the program that calls this function can continue without
+       error. This function also looks for the external Ceph Heat resource to
+       make sure in this scenario an error is not raised regardless of the
+       DeployedCeph boolean value.
+    """
+
+    resource_registry = environment.get('resource_registry', {})
+
+    if not resource_registry:
+        return
+
+    ceph_external = environment.get('resource_registry', {}).get(
+        'OS::TripleO::Services::CephExternal', 'OS::Heat::None')
+
+    if ceph_external != "OS::Heat::None":
+        return
+
+    # it's not an external Ceph cluster, let's evaluate the DeployedCeph param
+    # and the Ceph resources provided
+    deployed_ceph = environment.get('parameter_defaults',
+                                    {}).get('DeployedCeph', False)
+
+    # for each ceph resource, if the path contains cephadm and the DeployedCeph
+    # boolean is not True, raise an exception and guide the operator through
+    # the right path of deploying ceph
+
+    for name, path in resource_registry.items():
+        if 'Ceph' in name and 'cephadm' in path and not deployed_ceph:
+            raise exceptions.InvalidConfiguration('Ceph deployment is not '
+                                                  'available anymore during '
+                                                  'overcloud deploy. If you '
+                                                  'want to deploy Ceph, '
+                                                  'please see "openstack '
+                                                  ' overcloud ceph deploy '
+                                                  '--help" to deploy ceph '
+                                                  ' before deploying the '
+                                                  'overcloud and then include '
+                                                  'the cephadm environment '
+                                                  'file.')
+
+
 def check_ceph_fsid_matches_env_files(old_env, environment):
     """Check CephClusterFSID against proposed env files
 
diff --git a/tripleoclient/v1/overcloud_deploy.py b/tripleoclient/v1/overcloud_deploy.py
index c9bb9e64e..0861845bc 100644
--- a/tripleoclient/v1/overcloud_deploy.py
+++ b/tripleoclient/v1/overcloud_deploy.py
@@ -355,6 +355,9 @@ class DeployOvercloud(command.Command):
             # warning if necessary
             self._check_limit_skiplist_warning(env)
 
+        # check if we're trying to deploy ceph during the overcloud deployment
+        utils.check_deployed_ceph_stage(env)
+
         old_stack_env = utils.get_saved_stack_env(
             self.working_dir, parsed_args.stack)
         if old_stack_env:
diff --git a/tripleoclient/v1/tripleo_deploy.py b/tripleoclient/v1/tripleo_deploy.py
index 95d37fdd3..fb7c0e830 100644
--- a/tripleoclient/v1/tripleo_deploy.py
+++ b/tripleoclient/v1/tripleo_deploy.py
@@ -758,6 +758,9 @@ class Deploy(command.Command):
             environments, self.tht_render, parsed_args.templates,
             cleanup=parsed_args.cleanup)
 
+        # check if we're trying to deploy ceph during the overcloud deployment
+        utils.check_deployed_ceph_stage(env)
+
         roles_data = utils.fetch_roles_file(
             roles_file_path, parsed_args.templates)