diff --git a/hooks/charmhelpers/__init__.py b/hooks/charmhelpers/__init__.py
index b46e2e2..f72e7f8 100644
--- a/hooks/charmhelpers/__init__.py
+++ b/hooks/charmhelpers/__init__.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 # Bootstrap charm-helpers, installing its dependencies if necessary using
 # only standard libraries.
 import subprocess
diff --git a/hooks/charmhelpers/contrib/__init__.py b/hooks/charmhelpers/contrib/__init__.py
index e69de29..d1400a0 100644
--- a/hooks/charmhelpers/contrib/__init__.py
+++ b/hooks/charmhelpers/contrib/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/charmsupport/__init__.py b/hooks/charmhelpers/contrib/charmsupport/__init__.py
index e69de29..d1400a0 100644
--- a/hooks/charmhelpers/contrib/charmsupport/__init__.py
+++ b/hooks/charmhelpers/contrib/charmsupport/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/charmsupport/nrpe.py b/hooks/charmhelpers/contrib/charmsupport/nrpe.py
index 51b62d3..0fd0a9d 100644
--- a/hooks/charmhelpers/contrib/charmsupport/nrpe.py
+++ b/hooks/charmhelpers/contrib/charmsupport/nrpe.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 """Compatibility with the nrpe-external-master charm"""
 # Copyright 2012 Canonical Ltd.
 #
@@ -18,6 +34,7 @@ from charmhelpers.core.hookenv import (
     log,
     relation_ids,
     relation_set,
+    relations_of_type,
 )
 
 from charmhelpers.core.host import service
@@ -54,6 +71,12 @@ from charmhelpers.core.host import service
 #            juju-myservice-0
 #        If you're running multiple environments with the same services in them
 #        this allows you to differentiate between them.
+#    nagios_servicegroups:
+#      default: ""
+#      type: string
+#      description: |
+#        A comma-separated list of nagios servicegroups.
+#        If left empty, the nagios_context will be used as the servicegroup
 #
 # 3. Add custom checks (Nagios plugins) to files/nrpe-external-master
 #
@@ -125,9 +148,6 @@ define service {{
 
     def _locate_cmd(self, check_cmd):
         search_path = (
-            '/',
-            os.path.join(os.environ['CHARM_DIR'],
-                         'files/nrpe-external-master'),
             '/usr/lib/nagios/plugins',
             '/usr/local/lib/nagios/plugins',
         )
@@ -141,7 +161,7 @@ define service {{
         log('Check command not found: {}'.format(parts[0]))
         return ''
 
-    def write(self, nagios_context, hostname):
+    def write(self, nagios_context, hostname, nagios_servicegroups=None):
         nrpe_check_file = '/etc/nagios/nrpe.d/{}.cfg'.format(
             self.command)
         with open(nrpe_check_file, 'w') as nrpe_check_config:
@@ -153,16 +173,21 @@ define service {{
             log('Not writing service config as {} is not accessible'.format(
                 NRPE.nagios_exportdir))
         else:
-            self.write_service_config(nagios_context, hostname)
+            self.write_service_config(nagios_context, hostname,
+                                      nagios_servicegroups)
 
-    def write_service_config(self, nagios_context, hostname):
+    def write_service_config(self, nagios_context, hostname,
+                             nagios_servicegroups=None):
         for f in os.listdir(NRPE.nagios_exportdir):
             if re.search('.*{}.cfg'.format(self.command), f):
                 os.remove(os.path.join(NRPE.nagios_exportdir, f))
 
+        if not nagios_servicegroups:
+            nagios_servicegroups = nagios_context
+
         templ_vars = {
             'nagios_hostname': hostname,
-            'nagios_servicegroup': nagios_context,
+            'nagios_servicegroup': nagios_servicegroups,
             'description': self.description,
             'shortname': self.shortname,
             'command': self.command,
@@ -186,6 +211,10 @@ class NRPE(object):
         super(NRPE, self).__init__()
         self.config = config()
         self.nagios_context = self.config['nagios_context']
+        if 'nagios_servicegroups' in self.config:
+            self.nagios_servicegroups = self.config['nagios_servicegroups']
+        else:
+            self.nagios_servicegroups = 'juju'
         self.unit_name = local_unit().replace('/', '-')
         if hostname:
             self.hostname = hostname
@@ -211,7 +240,8 @@ class NRPE(object):
         nrpe_monitors = {}
         monitors = {"monitors": {"remote": {"nrpe": nrpe_monitors}}}
         for nrpecheck in self.checks:
-            nrpecheck.write(self.nagios_context, self.hostname)
+            nrpecheck.write(self.nagios_context, self.hostname,
+                            self.nagios_servicegroups)
             nrpe_monitors[nrpecheck.shortname] = {
                 "command": nrpecheck.command,
             }
@@ -220,3 +250,75 @@ class NRPE(object):
 
         for rid in relation_ids("local-monitors"):
             relation_set(relation_id=rid, monitors=yaml.dump(monitors))
+
+
+def get_nagios_hostcontext(relation_name='nrpe-external-master'):
+    """
+    Query relation with nrpe subordinate, return the nagios_host_context
+
+    :param str relation_name: Name of relation nrpe sub joined to
+    """
+    for rel in relations_of_type(relation_name):
+        if 'nagios_hostname' in rel:
+            return rel['nagios_host_context']
+
+
+def get_nagios_hostname(relation_name='nrpe-external-master'):
+    """
+    Query relation with nrpe subordinate, return the nagios_hostname
+
+    :param str relation_name: Name of relation nrpe sub joined to
+    """
+    for rel in relations_of_type(relation_name):
+        if 'nagios_hostname' in rel:
+            return rel['nagios_hostname']
+
+
+def get_nagios_unit_name(relation_name='nrpe-external-master'):
+    """
+    Return the nagios unit name prepended with host_context if needed
+
+    :param str relation_name: Name of relation nrpe sub joined to
+    """
+    host_context = get_nagios_hostcontext(relation_name)
+    if host_context:
+        unit = "%s:%s" % (host_context, local_unit())
+    else:
+        unit = local_unit()
+    return unit
+
+
+def add_init_service_checks(nrpe, services, unit_name):
+    """
+    Add checks for each service in list
+
+    :param NRPE nrpe: NRPE object to add check to
+    :param list services: List of services to check
+    :param str unit_name: Unit name to use in check description
+    """
+    for svc in services:
+        upstart_init = '/etc/init/%s.conf' % svc
+        sysv_init = '/etc/init.d/%s' % svc
+        if os.path.exists(upstart_init):
+            nrpe.add_check(
+                shortname=svc,
+                description='process check {%s}' % unit_name,
+                check_cmd='check_upstart_job %s' % svc
+            )
+        elif os.path.exists(sysv_init):
+            cronpath = '/etc/cron.d/nagios-service-check-%s' % svc
+            cron_file = ('*/5 * * * * root '
+                         '/usr/local/lib/nagios/plugins/check_exit_status.pl '
+                         '-s /etc/init.d/%s status > '
+                         '/var/lib/nagios/service-check-%s.txt\n' % (svc,
+                                                                     svc)
+                         )
+            f = open(cronpath, 'w')
+            f.write(cron_file)
+            f.close()
+            nrpe.add_check(
+                shortname=svc,
+                description='process check {%s}' % unit_name,
+                check_cmd='check_status_file.py -f '
+                          '/var/lib/nagios/service-check-%s.txt' % svc,
+            )
diff --git a/hooks/charmhelpers/contrib/charmsupport/volumes.py b/hooks/charmhelpers/contrib/charmsupport/volumes.py
index 0f905df..320961b 100644
--- a/hooks/charmhelpers/contrib/charmsupport/volumes.py
+++ b/hooks/charmhelpers/contrib/charmsupport/volumes.py
@@ -1,8 +1,25 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 '''
 Functions for managing volumes in juju units. One volume is supported per unit.
 Subordinates may have their own storage, provided it is on its own partition.
 
-Configuration stanzas:
+Configuration stanzas::
+
   volume-ephemeral:
     type: boolean
     default: true
@@ -20,7 +37,8 @@ Configuration stanzas:
       is 'true' and no volume-map value is set. Use 'juju set' to set a
       value and 'juju resolved' to complete configuration.
 
-Usage:
+Usage::
+
     from charmsupport.volumes import configure_volume, VolumeConfigurationError
     from charmsupport.hookenv import log, ERROR
     def post_mount_hook():
@@ -34,6 +52,7 @@ Usage:
                              after_change=post_mount_hook)
         except VolumeConfigurationError:
             log('Storage could not be configured', ERROR)
+
 '''
 
 # XXX: Known limitations
diff --git a/hooks/charmhelpers/contrib/hahelpers/__init__.py b/hooks/charmhelpers/contrib/hahelpers/__init__.py
index e69de29..d1400a0 100644
--- a/hooks/charmhelpers/contrib/hahelpers/__init__.py
+++ b/hooks/charmhelpers/contrib/hahelpers/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/hahelpers/apache.py b/hooks/charmhelpers/contrib/hahelpers/apache.py
index 6616fff..0091719 100644
--- a/hooks/charmhelpers/contrib/hahelpers/apache.py
+++ b/hooks/charmhelpers/contrib/hahelpers/apache.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 #
 # Copyright 2012 Canonical Ltd.
 #
diff --git a/hooks/charmhelpers/contrib/hahelpers/cluster.py b/hooks/charmhelpers/contrib/hahelpers/cluster.py
index 912b2fe..9a2588b 100644
--- a/hooks/charmhelpers/contrib/hahelpers/cluster.py
+++ b/hooks/charmhelpers/contrib/hahelpers/cluster.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 #
 # Copyright 2012 Canonical Ltd.
 #
@@ -205,19 +221,23 @@ def determine_apache_port(public_port, singlenode_mode=False):
     return public_port - (i * 10)
 
 
-def get_hacluster_config():
+def get_hacluster_config(exclude_keys=None):
     '''
     Obtains all relevant configuration from charm configuration required
     for initiating a relation to hacluster:
 
         ha-bindiface, ha-mcastport, vip
 
+    param: exclude_keys: list of setting key(s) to be excluded.
     returns: dict: A dict containing settings keyed by setting name.
     raises: HAIncompleteConfig if settings are missing.
     '''
     settings = ['ha-bindiface', 'ha-mcastport', 'vip']
     conf = {}
     for setting in settings:
+        if exclude_keys and setting in exclude_keys:
+            continue
+
         conf[setting] = config_get(setting)
     missing = []
     [missing.append(s) for s, v in six.iteritems(conf) if v is None]
diff --git a/hooks/charmhelpers/contrib/network/__init__.py b/hooks/charmhelpers/contrib/network/__init__.py
index e69de29..d1400a0 100644
--- a/hooks/charmhelpers/contrib/network/__init__.py
+++ b/hooks/charmhelpers/contrib/network/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/network/ip.py b/hooks/charmhelpers/contrib/network/ip.py
index 8dc8316..98b1754 100644
--- a/hooks/charmhelpers/contrib/network/ip.py
+++ b/hooks/charmhelpers/contrib/network/ip.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import glob
 import re
 import subprocess
diff --git a/hooks/charmhelpers/contrib/openstack/__init__.py b/hooks/charmhelpers/contrib/openstack/__init__.py
index e69de29..d1400a0 100644
--- a/hooks/charmhelpers/contrib/openstack/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/openstack/alternatives.py b/hooks/charmhelpers/contrib/openstack/alternatives.py
index b413259..ef77caf 100644
--- a/hooks/charmhelpers/contrib/openstack/alternatives.py
+++ b/hooks/charmhelpers/contrib/openstack/alternatives.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 ''' Helper for managing alternatives for file conflict resolution '''
 
 import subprocess
diff --git a/hooks/charmhelpers/contrib/openstack/amulet/__init__.py b/hooks/charmhelpers/contrib/openstack/amulet/__init__.py
index e69de29..d1400a0 100644
--- a/hooks/charmhelpers/contrib/openstack/amulet/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/amulet/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/openstack/amulet/deployment.py b/hooks/charmhelpers/contrib/openstack/amulet/deployment.py
index f3fee07..c50d3ec 100644
--- a/hooks/charmhelpers/contrib/openstack/amulet/deployment.py
+++ b/hooks/charmhelpers/contrib/openstack/amulet/deployment.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import six
 from charmhelpers.contrib.amulet.deployment import (
     AmuletDeployment
diff --git a/hooks/charmhelpers/contrib/openstack/amulet/utils.py b/hooks/charmhelpers/contrib/openstack/amulet/utils.py
index 3e0cc61..9c3d918 100644
--- a/hooks/charmhelpers/contrib/openstack/amulet/utils.py
+++ b/hooks/charmhelpers/contrib/openstack/amulet/utils.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import logging
 import os
 import time
diff --git a/hooks/charmhelpers/contrib/openstack/context.py b/hooks/charmhelpers/contrib/openstack/context.py
index 8ab61bf..c7c4cd4 100644
--- a/hooks/charmhelpers/contrib/openstack/context.py
+++ b/hooks/charmhelpers/contrib/openstack/context.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import json
 import os
 import time
@@ -468,21 +484,25 @@ class HAProxyContext(OSContextGenerator):
                             _unit = unit.replace('/', '-')
                             cluster_hosts[laddr]['backends'][_unit] = _laddr
 
-        # NOTE(jamespage) no split configurations found, just use
-        # private addresses
-        if not cluster_hosts:
-            netmask = get_netmask_for_address(addr)
-            cluster_hosts[addr] = {'network': "{}/{}".format(addr, netmask),
-                                   'backends': {l_unit: addr}}
-            for rid in relation_ids('cluster'):
-                for unit in related_units(rid):
-                    _laddr = relation_get('private-address',
-                                          rid=rid, unit=unit)
-                    if _laddr:
-                        _unit = unit.replace('/', '-')
-                        cluster_hosts[addr]['backends'][_unit] = _laddr
+        # NOTE(jamespage) add backend based on private address - this
+        # with either be the only backend or the fallback if no acls
+        # match in the frontend
+        cluster_hosts[addr] = {}
+        netmask = get_netmask_for_address(addr)
+        cluster_hosts[addr] = {'network': "{}/{}".format(addr, netmask),
+                               'backends': {l_unit: addr}}
+        for rid in relation_ids('cluster'):
+            for unit in related_units(rid):
+                _laddr = relation_get('private-address',
+                                      rid=rid, unit=unit)
+                if _laddr:
+                    _unit = unit.replace('/', '-')
+                    cluster_hosts[addr]['backends'][_unit] = _laddr
 
-        ctxt = {'frontends': cluster_hosts}
+        ctxt = {
+            'frontends': cluster_hosts,
+            'default_backend': addr
+        }
 
         if config('haproxy-server-timeout'):
             ctxt['haproxy_server_timeout'] = config('haproxy-server-timeout')
diff --git a/hooks/charmhelpers/contrib/openstack/ip.py b/hooks/charmhelpers/contrib/openstack/ip.py
index f062c80..9eabed7 100644
--- a/hooks/charmhelpers/contrib/openstack/ip.py
+++ b/hooks/charmhelpers/contrib/openstack/ip.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 from charmhelpers.core.hookenv import (
     config,
     unit_get,
diff --git a/hooks/charmhelpers/contrib/openstack/neutron.py b/hooks/charmhelpers/contrib/openstack/neutron.py
index 095cc24..902757f 100644
--- a/hooks/charmhelpers/contrib/openstack/neutron.py
+++ b/hooks/charmhelpers/contrib/openstack/neutron.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 # Various utilies for dealing with Neutron and the renaming from Quantum.
 
 from subprocess import check_output
diff --git a/hooks/charmhelpers/contrib/openstack/templates/__init__.py b/hooks/charmhelpers/contrib/openstack/templates/__init__.py
index 0b49ad2..7587679 100644
--- a/hooks/charmhelpers/contrib/openstack/templates/__init__.py
+++ b/hooks/charmhelpers/contrib/openstack/templates/__init__.py
@@ -1,2 +1,18 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 # dummy __init__.py to fool syncer into thinking this is a syncable python
 # module
diff --git a/hooks/charmhelpers/contrib/openstack/templating.py b/hooks/charmhelpers/contrib/openstack/templating.py
index 33df067..24cb272 100644
--- a/hooks/charmhelpers/contrib/openstack/templating.py
+++ b/hooks/charmhelpers/contrib/openstack/templating.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 
 import six
diff --git a/hooks/charmhelpers/contrib/openstack/utils.py b/hooks/charmhelpers/contrib/openstack/utils.py
index ddd40ce..26259a0 100644
--- a/hooks/charmhelpers/contrib/openstack/utils.py
+++ b/hooks/charmhelpers/contrib/openstack/utils.py
@@ -1,5 +1,21 @@
 #!/usr/bin/python
 
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 # Common python helper functions used for OpenStack charms.
 from collections import OrderedDict
 from functools import wraps
diff --git a/hooks/charmhelpers/contrib/python/__init__.py b/hooks/charmhelpers/contrib/python/__init__.py
index e69de29..d1400a0 100644
--- a/hooks/charmhelpers/contrib/python/__init__.py
+++ b/hooks/charmhelpers/contrib/python/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/python/packages.py b/hooks/charmhelpers/contrib/python/packages.py
index 78162b1..d848a12 100644
--- a/hooks/charmhelpers/contrib/python/packages.py
+++ b/hooks/charmhelpers/contrib/python/packages.py
@@ -1,6 +1,22 @@
 #!/usr/bin/env python
 # coding: utf-8
 
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 __author__ = "Jorge Niedbalski <jorge.niedbalski@canonical.com>"
 
 from charmhelpers.fetch import apt_install, apt_update
@@ -35,7 +51,7 @@ def pip_install_requirements(requirements, **options):
     pip_execute(command)
 
 
-def pip_install(package, fatal=False, **options):
+def pip_install(package, fatal=False, upgrade=False, **options):
     """Install a python package"""
     command = ["install"]
 
@@ -43,6 +59,9 @@ def pip_install(package, fatal=False, **options):
     for option in parse_options(options, available_options):
         command.append(option)
 
+    if upgrade:
+        command.append('--upgrade')
+
     if isinstance(package, list):
         command.extend(package)
     else:
diff --git a/hooks/charmhelpers/contrib/storage/__init__.py b/hooks/charmhelpers/contrib/storage/__init__.py
index e69de29..d1400a0 100644
--- a/hooks/charmhelpers/contrib/storage/__init__.py
+++ b/hooks/charmhelpers/contrib/storage/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/storage/linux/__init__.py b/hooks/charmhelpers/contrib/storage/linux/__init__.py
index e69de29..d1400a0 100644
--- a/hooks/charmhelpers/contrib/storage/linux/__init__.py
+++ b/hooks/charmhelpers/contrib/storage/linux/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/contrib/storage/linux/ceph.py b/hooks/charmhelpers/contrib/storage/linux/ceph.py
index 1479f4f..31ea7f9 100644
--- a/hooks/charmhelpers/contrib/storage/linux/ceph.py
+++ b/hooks/charmhelpers/contrib/storage/linux/ceph.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 #
 # Copyright 2012 Canonical Ltd.
 #
@@ -157,6 +173,17 @@ def create_keyring(service, key):
     log('Created new ceph keyring at %s.' % keyring, level=DEBUG)
 
 
+def delete_keyring(service):
+    """Delete an existing Ceph keyring."""
+    keyring = _keyring_path(service)
+    if not os.path.exists(keyring):
+        log('Keyring does not exist at %s' % keyring, level=WARNING)
+        return
+
+    os.remove(keyring)
+    log('Deleted ring at %s.' % keyring, level=INFO)
+
+
 def create_key_file(service, key):
     """Create a file containing key."""
     keyfile = _keyfile_path(service)
diff --git a/hooks/charmhelpers/contrib/storage/linux/loopback.py b/hooks/charmhelpers/contrib/storage/linux/loopback.py
index a22c3d7..c296f09 100644
--- a/hooks/charmhelpers/contrib/storage/linux/loopback.py
+++ b/hooks/charmhelpers/contrib/storage/linux/loopback.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import re
 from subprocess import (
diff --git a/hooks/charmhelpers/contrib/storage/linux/lvm.py b/hooks/charmhelpers/contrib/storage/linux/lvm.py
index 0aa65f4..34b5f71 100644
--- a/hooks/charmhelpers/contrib/storage/linux/lvm.py
+++ b/hooks/charmhelpers/contrib/storage/linux/lvm.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 from subprocess import (
     CalledProcessError,
     check_call,
diff --git a/hooks/charmhelpers/contrib/storage/linux/utils.py b/hooks/charmhelpers/contrib/storage/linux/utils.py
index c6a15e1..c8373b7 100644
--- a/hooks/charmhelpers/contrib/storage/linux/utils.py
+++ b/hooks/charmhelpers/contrib/storage/linux/utils.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import re
 from stat import S_ISBLK
diff --git a/hooks/charmhelpers/core/__init__.py b/hooks/charmhelpers/core/__init__.py
index e69de29..d1400a0 100644
--- a/hooks/charmhelpers/core/__init__.py
+++ b/hooks/charmhelpers/core/__init__.py
@@ -0,0 +1,15 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
diff --git a/hooks/charmhelpers/core/decorators.py b/hooks/charmhelpers/core/decorators.py
index 029a4ef..bb05620 100644
--- a/hooks/charmhelpers/core/decorators.py
+++ b/hooks/charmhelpers/core/decorators.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 #
 # Copyright 2014 Canonical Ltd.
 #
diff --git a/hooks/charmhelpers/core/fstab.py b/hooks/charmhelpers/core/fstab.py
index 0adf0db..be7de24 100644
--- a/hooks/charmhelpers/core/fstab.py
+++ b/hooks/charmhelpers/core/fstab.py
@@ -1,6 +1,22 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 __author__ = 'Jorge Niedbalski R. <jorge.niedbalski@canonical.com>'
 
 import io
diff --git a/hooks/charmhelpers/core/hookenv.py b/hooks/charmhelpers/core/hookenv.py
index 69ae456..cf552b3 100644
--- a/hooks/charmhelpers/core/hookenv.py
+++ b/hooks/charmhelpers/core/hookenv.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 "Interactions with the Juju environment"
 # Copyright 2013 Canonical Ltd.
 #
diff --git a/hooks/charmhelpers/core/host.py b/hooks/charmhelpers/core/host.py
index 5221120..cf2cbe1 100644
--- a/hooks/charmhelpers/core/host.py
+++ b/hooks/charmhelpers/core/host.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 """Tools for working with the host system"""
 # Copyright 2012 Canonical Ltd.
 #
@@ -168,10 +184,10 @@ def mkdir(path, owner='root', group='root', perms=0o555, force=False):
             log("Removing non-directory file {} prior to mkdir()".format(path))
             os.unlink(realpath)
             os.makedirs(realpath, perms)
-        os.chown(realpath, uid, gid)
     elif not path_exists:
         os.makedirs(realpath, perms)
-        os.chown(realpath, uid, gid)
+    os.chown(realpath, uid, gid)
+    os.chmod(realpath, perms)
 
 
 def write_file(path, content, owner='root', group='root', perms=0o444):
@@ -389,6 +405,9 @@ def cmp_pkgrevno(package, revno, pkgcache=None):
     *  0 => Installed revno is the same as supplied arg
     * -1 => Installed revno is less than supplied arg
 
+    This function imports apt_cache function from charmhelpers.fetch if
+    the pkgcache argument is None. Be sure to add charmhelpers.fetch if
+    you call this function, or pass an apt_pkg.Cache() instance.
     '''
     import apt_pkg
     if not pkgcache:
@@ -407,13 +426,21 @@ def chdir(d):
         os.chdir(cur)
 
 
-def chownr(path, owner, group):
+def chownr(path, owner, group, follow_links=True):
     uid = pwd.getpwnam(owner).pw_uid
     gid = grp.getgrnam(group).gr_gid
+    if follow_links:
+        chown = os.chown
+    else:
+        chown = os.lchown
 
     for root, dirs, files in os.walk(path):
         for name in dirs + files:
             full = os.path.join(root, name)
             broken_symlink = os.path.lexists(full) and not os.path.exists(full)
             if not broken_symlink:
-                os.chown(full, uid, gid)
+                chown(full, uid, gid)
+
+
+def lchownr(path, owner, group):
+    chownr(path, owner, group, follow_links=False)
diff --git a/hooks/charmhelpers/core/services/__init__.py b/hooks/charmhelpers/core/services/__init__.py
index 69dde79..0928158 100644
--- a/hooks/charmhelpers/core/services/__init__.py
+++ b/hooks/charmhelpers/core/services/__init__.py
@@ -1,2 +1,18 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 from .base import *  # NOQA
 from .helpers import *  # NOQA
diff --git a/hooks/charmhelpers/core/services/base.py b/hooks/charmhelpers/core/services/base.py
index 87ecb13..c5534e4 100644
--- a/hooks/charmhelpers/core/services/base.py
+++ b/hooks/charmhelpers/core/services/base.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import re
 import json
diff --git a/hooks/charmhelpers/core/services/helpers.py b/hooks/charmhelpers/core/services/helpers.py
index 163a793..5e3af9d 100644
--- a/hooks/charmhelpers/core/services/helpers.py
+++ b/hooks/charmhelpers/core/services/helpers.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import yaml
 from charmhelpers.core import hookenv
diff --git a/hooks/charmhelpers/core/sysctl.py b/hooks/charmhelpers/core/sysctl.py
index 0f29963..d642a37 100644
--- a/hooks/charmhelpers/core/sysctl.py
+++ b/hooks/charmhelpers/core/sysctl.py
@@ -1,6 +1,22 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 __author__ = 'Jorge Niedbalski R. <jorge.niedbalski@canonical.com>'
 
 import yaml
diff --git a/hooks/charmhelpers/core/templating.py b/hooks/charmhelpers/core/templating.py
index 569eaed..9766909 100644
--- a/hooks/charmhelpers/core/templating.py
+++ b/hooks/charmhelpers/core/templating.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 
 from charmhelpers.core import host
diff --git a/hooks/charmhelpers/fetch/__init__.py b/hooks/charmhelpers/fetch/__init__.py
index aceadea..792e629 100644
--- a/hooks/charmhelpers/fetch/__init__.py
+++ b/hooks/charmhelpers/fetch/__init__.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import importlib
 from tempfile import NamedTemporaryFile
 import time
diff --git a/hooks/charmhelpers/fetch/archiveurl.py b/hooks/charmhelpers/fetch/archiveurl.py
index 8a4624b..d25a0dd 100644
--- a/hooks/charmhelpers/fetch/archiveurl.py
+++ b/hooks/charmhelpers/fetch/archiveurl.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 import hashlib
 import re
diff --git a/hooks/charmhelpers/fetch/bzrurl.py b/hooks/charmhelpers/fetch/bzrurl.py
index 8ef48f3..3531315 100644
--- a/hooks/charmhelpers/fetch/bzrurl.py
+++ b/hooks/charmhelpers/fetch/bzrurl.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 from charmhelpers.fetch import (
     BaseFetchHandler,
@@ -11,10 +27,12 @@ if six.PY3:
 
 try:
     from bzrlib.branch import Branch
+    from bzrlib import bzrdir, workingtree, errors
 except ImportError:
     from charmhelpers.fetch import apt_install
     apt_install("python-bzrlib")
     from bzrlib.branch import Branch
+    from bzrlib import bzrdir, workingtree, errors
 
 
 class BzrUrlFetchHandler(BaseFetchHandler):
@@ -34,9 +52,15 @@ class BzrUrlFetchHandler(BaseFetchHandler):
         if url_parts.scheme == "lp":
             from bzrlib.plugin import load_plugins
             load_plugins()
+        try:
+            local_branch = bzrdir.BzrDir.create_branch_convenience(dest)
+        except errors.AlreadyControlDirError:
+            local_branch = Branch.open(dest)
         try:
             remote_branch = Branch.open(source)
-            remote_branch.bzrdir.sprout(dest).open_branch()
+            remote_branch.push(local_branch)
+            tree = workingtree.WorkingTree.open(dest)
+            tree.update()
         except Exception as e:
             raise e
 
diff --git a/hooks/charmhelpers/fetch/giturl.py b/hooks/charmhelpers/fetch/giturl.py
index f3aa282..5376786 100644
--- a/hooks/charmhelpers/fetch/giturl.py
+++ b/hooks/charmhelpers/fetch/giturl.py
@@ -1,3 +1,19 @@
+# Copyright 2014-2015 Canonical Limited.
+#
+# This file is part of charm-helpers.
+#
+# charm-helpers is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# charm-helpers is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with charm-helpers.  If not, see <http://www.gnu.org/licenses/>.
+
 import os
 from charmhelpers.fetch import (
     BaseFetchHandler,
@@ -16,6 +32,8 @@ except ImportError:
     apt_install("python-git")
     from git import Repo
 
+from git.exc import GitCommandError
+
 
 class GitUrlFetchHandler(BaseFetchHandler):
     """Handler for git branches via generic and github URLs"""
@@ -46,6 +64,8 @@ class GitUrlFetchHandler(BaseFetchHandler):
             mkdir(dest_dir, perms=0o755)
         try:
             self.clone(source, dest_dir, branch)
+        except GitCommandError as e:
+            raise UnhandledSource(e.message)
         except OSError as e:
             raise UnhandledSource(e.strerror)
         return dest_dir