diff --git a/compass/actions/deploy.py b/compass/actions/deploy.py
index f078169b..e5c9475b 100644
--- a/compass/actions/deploy.py
+++ b/compass/actions/deploy.py
@@ -22,6 +22,7 @@ from compass.db.api import machine as machine_db
 from compass.db.api import user as user_db
 from compass.deployment.deploy_manager import DeployManager
 from compass.deployment.utils import constants as const
+import logging
 
 
 def deploy(cluster_id, hosts_id_list, username=None):
@@ -49,8 +50,10 @@ def deploy(cluster_id, hosts_id_list, username=None):
 
         deploy_manager = DeployManager(adapter_info, cluster_info, hosts_info)
         #deploy_manager.prepare_for_deploy()
-        deployed_config = deploy_manager.deploy()
+        logging.debug('Created deploy manager with %s %s %s'
+                      % (adapter_info, cluster_info, hosts_info))
 
+        deployed_config = deploy_manager.deploy()
         ActionHelper.save_deployed_config(deployed_config, user)
         ActionHelper.update_state(cluster_id, hosts_id_list, user)
 
@@ -237,6 +240,7 @@ class ActionHelper(object):
         hosts_info = {}
         for host_id in hosts_id_list:
             info = cluster_db.get_cluster_host(user, cluster_id, host_id)
+            logging.debug("checking on info %r %r" % (host_id, info))
             info[const.ROLES] = ActionHelper._get_role_names(info[const.ROLES])
 
             config = cluster_db.get_cluster_host_config(user,
diff --git a/compass/api/api.py b/compass/api/api.py
index a5619b40..0d31c9d8 100644
--- a/compass/api/api.py
+++ b/compass/api/api.py
@@ -14,6 +14,7 @@
 # limitations under the License.
 
 """Define all the RestfulAPI entry points."""
+
 import datetime
 import functools
 import logging
@@ -21,16 +22,11 @@ import netaddr
 import requests
 import simplejson as json
 
-from flask import flash
-from flask import redirect
-from flask import request
-from flask import session as app_session
-from flask import url_for
-
 from flask.ext.login import current_user
 from flask.ext.login import login_required
 from flask.ext.login import login_user
 from flask.ext.login import logout_user
+from flask import request
 
 from compass.api import app
 from compass.api import auth_handler
diff --git a/compass/db/api/utils.py b/compass/db/api/utils.py
index db2345e2..8b66b856 100644
--- a/compass/db/api/utils.py
+++ b/compass/db/api/utils.py
@@ -13,14 +13,13 @@
 # limitations under the License.
 
 """Utils for database usage."""
-import copy
+
 import functools
 import inspect
 import logging
 import netaddr
 import re
 
-from sqlalchemy import and_
 from sqlalchemy import or_
 
 from compass.db import exception
@@ -55,9 +54,8 @@ def _one_item_list_condition_func(col_attr, value, condition_func):
 
 
 def _model_filter_by_condition(
-    query, col_attr, value, condition_func,
-    list_condition_func=_default_list_condition_func
-):
+        query, col_attr, value, condition_func,
+        list_condition_func=_default_list_condition_func):
     if isinstance(value, list):
         condition = list_condition_func(
             col_attr, value, condition_func
diff --git a/compass/deployment/deploy_manager.py b/compass/deployment/deploy_manager.py
index 2be61149..63afd0d0 100644
--- a/compass/deployment/deploy_manager.py
+++ b/compass/deployment/deploy_manager.py
@@ -61,6 +61,15 @@ class DeployManager(object):
 
         return installer
 
+    def deploy(self):
+        """Deploy the cluster."""
+        deployed_config = self.deploy_os()
+        package_deployed_config = self.deploy_target_system()
+
+        util.merge_dict(deployed_config, package_deployed_config)
+
+        return deployed_config
+
     def clean_progress(self):
         """Clean previous installation log and progress."""
         self.clean_os_installtion_progress()
@@ -109,15 +118,6 @@ class DeployManager(object):
 
         return self.pk_installer.deploy()
 
-    def deploy(self):
-        """Deploy the cluster."""
-        deployed_config = self.deploy_os()
-        package_deployed_config = self.deploy_target_system()
-
-        util.merge_dict(deployed_config, package_deployed_config)
-
-        return deployed_config
-
     def redeploy_os(self):
         """Redeploy OS for this cluster without changing configurations."""
         if not self.os_installer:
diff --git a/compass/deployment/installers/installer.py b/compass/deployment/installers/installer.py
index 8a8d79bb..ae8e020f 100644
--- a/compass/deployment/installers/installer.py
+++ b/compass/deployment/installers/installer.py
@@ -121,10 +121,11 @@ class BaseInstaller(object):
                 output[mapping_to] = config_value
 
     def get_config_from_template(self, tmpl_dir, vars_dict):
+        logging.debug("template path is %s", tmpl_dir)
+        logging.debug("vars_dict is %s", vars_dict)
+
         if not os.path.exists(tmpl_dir) or not vars_dict:
             logging.info("Template dir or vars_dict is None!")
-            logging.debug("template dir is %s", tmpl_dir)
-            logging.debug("vars_dict is %s", vars_dict)
             return {}
 
         searchList = []
@@ -140,6 +141,7 @@ class BaseInstaller(object):
         config = json.loads(tmpl.respond(), encoding='utf-8')
         config = json.loads(json.dumps(config), encoding='utf-8')
 
+        logging.debug("get_config_from_template resulting %s", config)
         return config
 
     @classmethod
diff --git a/compass/deployment/installers/pk_installers/chef_installer/__init__.py b/compass/deployment/installers/pk_installers/chef_installer/__init__.py
index 5e42ae96..e69de29b 100644
--- a/compass/deployment/installers/pk_installers/chef_installer/__init__.py
+++ b/compass/deployment/installers/pk_installers/chef_installer/__init__.py
@@ -1,13 +0,0 @@
-# Copyright 2014 Huawei Technologies Co. Ltd
-#
-# 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.
diff --git a/compass/deployment/installers/pk_installers/chef_installer/chef_installer.py b/compass/deployment/installers/pk_installers/chef_installer/chef_installer.py
index 35bf7d18..2eff0512 100644
--- a/compass/deployment/installers/pk_installers/chef_installer/chef_installer.py
+++ b/compass/deployment/installers/pk_installers/chef_installer/chef_installer.py
@@ -233,6 +233,7 @@ class ChefInstaller(PKInstaller):
         env_tmpl_path = os.path.join(
             os.path.join(self.tmpl_dir, self.ENV_TMPL_DIR), tmpl_name
         )
+        logging.debug("generating env from template %s", env_tmpl_path)
         return self.get_config_from_template(env_tmpl_path, global_vars_dict)
 
     def get_create_environment(self, env_name):
@@ -241,13 +242,20 @@ class ChefInstaller(PKInstaller):
         env.save()
         return env
 
-    def _update_env(self, env, env_attrs):
-        for attr in env_attrs:
-            if attr in env.attributes:
-                setattr(env, attr, env_attrs[attr])
+    def _update_environment(self, env, env_attrs):
+        # By default, pychef provides these attribute keys:
+        # 'description', 'cookbook_versions', 'default_attributes',
+        # 'override_attributes'
+        for name, value in env_attrs.iteritems():
+            if name in env.attributes:
+                logging.debug("Updating env with attr %s", name)
+                setattr(env, name, value)
+            else:
+                logging.info("Ignoring attr %s for env", name)
+
         env.save()
 
-    def update_environment(self, env_name, global_vars_dict):
+    def upload_environment(self, env_name, global_vars_dict):
         """Generate environment attributes based on the template file and
            upload it to chef server.
 
@@ -257,7 +265,7 @@ class ChefInstaller(PKInstaller):
         """
         env_config = self._generate_env_attributes(global_vars_dict)
         env = self.get_create_environment(env_name)
-        self._update_env(env, env_config)
+        self._update_environment(env, env_config)
 
     def _generate_databagitem_attributes(self, tmpl_dir, vars_dict):
         return self.get_config_from_template(tmpl_dir, vars_dict)
@@ -275,13 +283,14 @@ class ChefInstaller(PKInstaller):
         import chef
         databags_dir = os.path.join(self.tmpl_dir, self.DATABAG_TMPL_DIR)
         for databag_name in databag_names:
-            databag_tmpl = os.path.join(databags_dir, databag_name)
+            tmpl_filename = databag_name + ".tmpl"
+            databag_tmpl_filepath = os.path.join(databags_dir, tmpl_filename)
             databagitem_attrs = self._generate_databagitem_attributes(
-                databag_tmpl, global_vars_dict
+                databag_tmpl_filepath, global_vars_dict
             )
             if not databagitem_attrs:
                 logging.info("Databag template not found or vars_dict is None")
-                logging.info("databag template is %s", databag_tmpl)
+                logging.info("databag template is %s", databag_tmpl_filepath)
                 continue
 
             databag = self.get_create_databag(databag_name)
@@ -392,11 +401,12 @@ class ChefInstaller(PKInstaller):
 
         global_vars_dict = self._get_cluster_tmpl_vars()
 
-        # Update environment
-        self.update_environment(env_name, global_vars_dict)
+        # Upload environment to chef server
+        self.upload_environment(env_name, global_vars_dict)
 
         # Update Databag item
-        self.update_databags(global_vars_dict)
+        # TODO(grace): Fix the databag template rendering.
+        # self.update_databags(global_vars_dict)
 
         hosts_deployed_configs = {}
 
diff --git a/compass/tests/deployment/installers/pk_installers/chef_installer/test_chef.py b/compass/tests/deployment/installers/pk_installers/chef_installer/test_chef.py
index b8b8a533..e0e33390 100644
--- a/compass/tests/deployment/installers/pk_installers/chef_installer/test_chef.py
+++ b/compass/tests/deployment/installers/pk_installers/chef_installer/test_chef.py
@@ -405,7 +405,7 @@ class TestChefInstaller(unittest2.TestCase):
                 }
             }
         }
-        self.test_chef.update_environment = Mock()
+        self.test_chef.upload_environment = Mock()
         self.test_chef.update_databags = Mock()
         self.test_chef.get_create_node = Mock()
         self.test_chef.add_roles = Mock()
diff --git a/compass/utils/util.py b/compass/utils/util.py
index d7859bae..e746a217 100644
--- a/compass/utils/util.py
+++ b/compass/utils/util.py
@@ -16,7 +16,7 @@
 
    .. moduleauthor:: Xiaodong Wang <xiaodongwang@huawei.com>
 """
-import copy
+
 import crypt
 import datetime
 import logging
diff --git a/conf/flavor/openstack_chef.conf b/conf/flavor/openstack_chef.conf
index ca449fe9..1ce5186e 100644
--- a/conf/flavor/openstack_chef.conf
+++ b/conf/flavor/openstack_chef.conf
@@ -1,13 +1,13 @@
 ADAPTER_NAME = 'openstack_icehouse'
 FLAVORS = [{
     'flavor': 'allinone',
-    'display_name': 'allinone',
+    'display_name': 'All-In-One',
     'template': 'allinone.tmpl',
     'roles': ['allinone-compute']
 }, {
-    'flavor': 'multiroles',
-    'display_name': 'multiroles',
-    'template': 'multiroles.tmpl',
+    'flavor': 'multinodes',
+    'display_name': 'Multi-node Cluster',
+    'template': 'multinodes.tmpl',
     'roles': [
         'os-compute-worker', 'os-network', 'os-block-storage-worker',
         'os-image', 'os-compute-vncproxy', 'os-controller',
diff --git a/conf/templates/chef_installer/openstack_icehouse/environments/multinodes.tmpl b/conf/templates/chef_installer/openstack_icehouse/environments/multinodes.tmpl
index d5e75076..e96159d7 100644
--- a/conf/templates/chef_installer/openstack_icehouse/environments/multinodes.tmpl
+++ b/conf/templates/chef_installer/openstack_icehouse/environments/multinodes.tmpl
@@ -74,7 +74,7 @@
           "tunnel_id_ranges": "1:1000"
         },
         "l3": {
-            "external_network_bridge_interface": "$os_compute_worker.public.interface"    
+            "external_network_bridge_interface": "$os_compute_worker.public.interface"
         }
       },
       "db": {