diff --git a/ceilometerclient/openstack/common/importutils.py b/ceilometerclient/openstack/common/importutils.py
index 3bd277f4..7a303f93 100644
--- a/ceilometerclient/openstack/common/importutils.py
+++ b/ceilometerclient/openstack/common/importutils.py
@@ -24,7 +24,7 @@ import traceback
 
 
 def import_class(import_str):
-    """Returns a class from a string including module and class"""
+    """Returns a class from a string including module and class."""
     mod_str, _sep, class_str = import_str.rpartition('.')
     try:
         __import__(mod_str)
@@ -41,8 +41,9 @@ def import_object(import_str, *args, **kwargs):
 
 
 def import_object_ns(name_space, import_str, *args, **kwargs):
-    """
-    Import a class and return an instance of it, first by trying
+    """Tries to import object from default namespace.
+
+    Imports a class and return an instance of it, first by trying
     to find the class in a default namespace, then failing back to
     a full path if not found in the default namespace.
     """
diff --git a/ceilometerclient/openstack/common/py3kcompat/urlutils.py b/ceilometerclient/openstack/common/py3kcompat/urlutils.py
index 8459c3b4..c2f0ae72 100644
--- a/ceilometerclient/openstack/common/py3kcompat/urlutils.py
+++ b/ceilometerclient/openstack/common/py3kcompat/urlutils.py
@@ -24,7 +24,9 @@ import six
 
 if six.PY3:
     # python3
+    import urllib.error
     import urllib.parse
+    import urllib.request
 
     urlencode = urllib.parse.urlencode
     urljoin = urllib.parse.urljoin
@@ -34,9 +36,14 @@ if six.PY3:
     urlparse = urllib.parse.urlparse
     urlsplit = urllib.parse.urlsplit
     urlunsplit = urllib.parse.urlunsplit
+
+    urlopen = urllib.request.urlopen
+    URLError = urllib.error.URLError
+    pathname2url = urllib.request.pathname2url
 else:
     # python2
     import urllib
+    import urllib2
     import urlparse
 
     urlencode = urllib.urlencode
@@ -49,3 +56,7 @@ else:
     urlparse = parse.urlparse
     urlsplit = parse.urlsplit
     urlunsplit = parse.urlunsplit
+
+    urlopen = urllib2.urlopen
+    URLError = urllib2.URLError
+    pathname2url = urllib.pathname2url
diff --git a/tools/install_venv_common.py b/tools/install_venv_common.py
index f428c1e0..1bab88a3 100644
--- a/tools/install_venv_common.py
+++ b/tools/install_venv_common.py
@@ -114,15 +114,12 @@ class InstallVenv(object):
         print('Installing dependencies with pip (this can take a while)...')
 
         # First things first, make sure our venv has the latest pip and
-        # setuptools.
-        self.pip_install('pip>=1.3')
+        # setuptools and pbr
+        self.pip_install('pip>=1.4')
         self.pip_install('setuptools')
+        self.pip_install('pbr')
 
-        self.pip_install('-r', self.requirements)
-        self.pip_install('-r', self.test_requirements)
-
-    def post_process(self):
-        self.get_distro().post_process()
+        self.pip_install('-r', self.requirements, '-r', self.test_requirements)
 
     def parse_args(self, argv):
         """Parses command-line arguments."""
@@ -156,14 +153,6 @@ class Distro(InstallVenv):
                  ' requires virtualenv, please install it using your'
                  ' favorite package management tool' % self.project)
 
-    def post_process(self):
-        """Any distribution-specific post-processing gets done here.
-
-        In particular, this is useful for applying patches to code inside
-        the venv.
-        """
-        pass
-
 
 class Fedora(Distro):
     """This covers all Fedora-based distributions.
@@ -175,10 +164,6 @@ class Fedora(Distro):
         return self.run_command_with_code(['rpm', '-q', pkg],
                                           check_exit_code=False)[1] == 0
 
-    def apply_patch(self, originalfile, patchfile):
-        self.run_command(['patch', '-N', originalfile, patchfile],
-                         check_exit_code=False)
-
     def install_virtualenv(self):
         if self.check_cmd('virtualenv'):
             return
@@ -187,26 +172,3 @@ class Fedora(Distro):
             self.die("Please install 'python-virtualenv'.")
 
         super(Fedora, self).install_virtualenv()
-
-    def post_process(self):
-        """Workaround for a bug in eventlet.
-
-        This currently affects RHEL6.1, but the fix can safely be
-        applied to all RHEL and Fedora distributions.
-
-        This can be removed when the fix is applied upstream.
-
-        Nova: https://bugs.launchpad.net/nova/+bug/884915
-        Upstream: https://bitbucket.org/eventlet/eventlet/issue/89
-        RHEL: https://bugzilla.redhat.com/958868
-        """
-
-        # Install "patch" program if it's not there
-        if not self.check_pkg('patch'):
-            self.die("Please install 'patch'.")
-
-        # Apply the eventlet patch
-        self.apply_patch(os.path.join(self.venv, 'lib', self.py_version,
-                                      'site-packages',
-                                      'eventlet/green/subprocess.py'),
-                         'contrib/redhat-eventlet.patch')