OpenStack OpenContrail Neutron Development Environment Setup

1)
clone neutron from github
#cd /home/saju/
#git clone https://github.com/openstack/neutron.git
#cd neutron
#git checkout stable/icehouse

2)
Create script to start/stop neutron-server from cloned dir
#vim neutron-server
import sys
from neutron.server import main

if __name__ == "__main__":
    sys.exit(main())

3)
Stop the neutron-server
#sudo service neutron-server stop
OR
#sudo /etc/init.d/neutron-server stop

4)
Start/Stop neutron-server from cloned dir
#sudo python neutron-server --config-file /etc/neutron/neutron.conf --log-file /var/log/neutron/server.log --config-file /etc/neutron/plugins/opencontrail/ContrailPlugin.ini

5)
a)
Copy the folder "neutron/neutron/plugins/opencontrail" from "juno" branch to "icehouse"

b)
Create a dir named "extensions" under /home/saju/neutron/neutron/plugins/opencontrail and create/copy following files
* __init__.py
* Copy the extension file "ipam.py" from /usr/lib/python2.7/dist-packages/neutron_plugin_contrail/extensions/ipam.py

c)
Create a dir named "plugins" under /home/saju/neutron/neutron/plugins/opencontrail and create/copy following files
* __init__.py
* Copy the IPAM plugin file "contrail_plugin_ipam.py" from /usr/lib/python2.7/dist-packages/neutron_plugin_contrail/plugins/opencontrail/contrail_plugin_ipam.py

6)
Config changes
a)
#sudo vim /etc/neutron/plugins/opencontrail/ContrailPlugin.ini
Enable only the IPAM extension
contrail_extensions = ipam:neutron.plugins.opencontrail.plugins.contrail_plugin_ipam.NeutronPluginContrailIpam

b)
#sudo vim /etc/neutron/neutron.conf
core_plugin = neutron.plugins.opencontrail.contrail_plugin.NeutronPluginContrailCoreV2
api_extensions_path = extensions:/home/saju/neutron/neutron/plugins/opencontrail/extensions

7)
Patch for neutron/plugins/opencontrail/contrail_plugin.py

diff --git a/neutron/plugins/opencontrail/contrail_plugin.py b/neutron/plugins/opencontrail/contrail_plugin.py
index 511c684..09576ce 100644
--- a/neutron/plugins/opencontrail/contrail_plugin.py
+++ b/neutron/plugins/opencontrail/contrail_plugin.py
@@ -23,6 +23,7 @@ from neutron.extensions import external_net
 from neutron.extensions import portbindings
 from neutron.extensions import securitygroup
 from neutron import neutron_plugin_base_v2
+from neutron.openstack.common import importutils
 from neutron.openstack.common import jsonutils
 from neutron.openstack.common import log as logging
 from neutron.plugins.opencontrail.common import exceptions as c_exc
@@ -30,14 +31,16 @@ from neutron.plugins.opencontrail.common import exceptions as c_exc

 LOG = logging.getLogger(__name__)

-opencontrail_opts = [
-    cfg.StrOpt('api_server_ip', default='127.0.0.1',
-               help='IP address to connect to opencontrail controller'),
-    cfg.IntOpt('api_server_port', default=8082,
-               help='Port to connect to opencontrail controller'),
-]
+#opencontrail_opts = [
+#    cfg.StrOpt('api_server_ip', default='127.0.0.1',
+#               help='IP address to connect to opencontrail controller'),
+#    cfg.IntOpt('api_server_port', default=8082,
+#               help='Port to connect to opencontrail controller'),
+#    cfg.DictOpt('contrail_extensions', default={},
+#                help='Enable Contrail extensions(policy, ipam)'),
+#]

-cfg.CONF.register_opts(opencontrail_opts, 'CONTRAIL')
+#cfg.CONF.register_opts(opencontrail_opts, 'CONTRAIL')

 CONTRAIL_EXCEPTION_MAP = {
     requests.codes.not_found: c_exc.ContrailNotFoundError,
@@ -49,6 +52,19 @@ CONTRAIL_EXCEPTION_MAP = {
 }


+vnc_opts = [
+    cfg.StrOpt('api_server_ip', default='127.0.0.1',
+               help='IP address to connect to VNC controller'),
+    cfg.StrOpt('api_server_port', default='8082',
+               help='Port to connect to VNC controller'),
+    cfg.DictOpt('contrail_extensions', default={},
+                help='Enable Contrail extensions(policy, ipam)'),
+]
+
+class InvalidContrailExtensionError(exc.ServiceUnavailable):
+    message = _("Invalid Contrail Extension: %(ext_name) %(ext_class)")
+
+
 class NeutronPluginContrailCoreV2(neutron_plugin_base_v2.NeutronPluginBaseV2,
                                   securitygroup.SecurityGroupPluginBase,
                                   portbindings_base.PortBindingBaseMixin,
@@ -56,16 +72,58 @@ class NeutronPluginContrailCoreV2(neutron_plugin_base_v2.NeutronPluginBaseV2,

     supported_extension_aliases = ["security-group", "router",
                                    "port-security", "binding", "agent",
-                                   "quotas", "external-net"]
+                                   "quotas", "external-net", "ipam"]
     PLUGIN_URL_PREFIX = '/neutron'
     __native_bulk_support = False

+    # patch VIF_TYPES
+    portbindings.__dict__['VIF_TYPE_VROUTER'] = 'vrouter'
+    portbindings.VIF_TYPES.append(portbindings.VIF_TYPE_VROUTER)
+
+    def _parse_class_args(self):
+        """Parse the contrailplugin.ini file.
+
+        Opencontrail supports extension such as ipam, policy, these extensions
+        can be configured in the plugin configuration file as shown below.
+        Plugin then loads the specified extensions.
+        contrail_extensions=ipam:,policy:
+        """
+
+        contrail_extensions = cfg.CONF.APISERVER.contrail_extensions
+    print "===contrail_extensions:===", contrail_extensions
+        # If multiple class specified for same extension, last one will win
+        # according to DictOpt behavior
+        for ext_name, ext_class in contrail_extensions.items():
+            try:
+                if not ext_class:
+                    LOG.error(_('Malformed contrail extension...'))
+                    continue
+                self.supported_extension_aliases.append(ext_name)
+                if ext_class == 'None':
+                    continue
+                ext_class = importutils.import_class(ext_class)
+                ext_instance = ext_class()
+                ext_instance.set_core(self)
+                for method in dir(ext_instance):
+                    for prefix in ['get', 'update', 'delete', 'create']:
+                        if method.startswith('%s_' % prefix):
+                            setattr(self, method,
+                                    ext_instance.__getattribute__(method))
+            except Exception:
+                LOG.exception(_("Contrail Backend Error"))
+                # Converting contrail backend error to Neutron Exception
+                raise InvalidContrailExtensionError(
+                    ext_name=ext_name, ext_class=ext_class)
+
+
     def __init__(self):
         """Initialize the plugin class."""

         super(NeutronPluginContrailCoreV2, self).__init__()
         portbindings_base.register_port_dict_function()
-        self.base_binding_dict = self._get_base_binding_dict()
+        #self.base_binding_dict = self._get_base_binding_dict()
+    cfg.CONF.register_opts(vnc_opts, 'APISERVER')
+    self._parse_class_args()

     def _get_base_binding_dict(self):
         """return VIF type and details."""
@@ -88,8 +146,8 @@ class NeutronPluginContrailCoreV2(neutron_plugin_base_v2.NeutronPluginBaseV2,
     def _relay_request(self, url_path, data=None):
         """Send received request to api server."""

-        url = "http://%s:%d%s" % (cfg.CONF.CONTRAIL.api_server_ip,
-                                  cfg.CONF.CONTRAIL.api_server_port,
+        url = "http://%s:%s%s" % (cfg.CONF.APISERVER.api_server_ip,
+                                  cfg.CONF.APISERVER.api_server_port,
                                   url_path)

         return self._request_api_server(

8)
Export credentials

export OS_USERNAME=admin
export OS_PASSWORD=secret123
export OS_TENANT_NAME=demo
export OS_AUTH_URL=http://127.0.0.1:35357/v2.0

9)
Test the CLI command
#neutron ipam-list