Backward compatibility for lbaas

Lbaas driver class is changed to one from this repo in case it attempts
to be loaded from neutron repo.

This change depends on I76af175c4387326a4e5ff95c2f15d8b866dedab3

Change-Id: If850adb3ec9db0a9ff0d43cd7445264c168d241c
Closes-Bug: 1401895

neutron_lbaas/services/loadbalancer/agent/agent_manager.py

@@ -26,10 +26,13 @@ from neutron.openstack.common import log as logging
 from neutron.openstack.common import loopingcall
 from neutron.openstack.common import periodic_task
 from neutron.plugins.common import constants
+from neutron.services import provider_configuration as provconfig
 from neutron_lbaas.services.loadbalancer.agent import agent_api
 
 LOG = logging.getLogger(__name__)
 
+DEVICE_DRIVERS = 'device_drivers'
+
 OPTS = [
     cfg.MultiStrOpt(
         'device_driver',
@@ -83,6 +86,8 @@ class LbaasAgentManager(periodic_task.PeriodicTasks):
     def _load_drivers(self):
         self.device_drivers = {}
         for driver in self.conf.device_driver:
+            driver = provconfig.get_provider_driver_class(driver,
+                                                          DEVICE_DRIVERS)
             try:
                 driver_inst = importutils.import_object(
                     driver,

neutron_lbaas/services/loadbalancer/drivers/common/agent_driver_base.py

@@ -28,11 +28,14 @@ from neutron.extensions import portbindings
 from neutron.i18n import _LW
 from neutron.openstack.common import log as logging
 from neutron.plugins.common import constants
+from neutron.services import provider_configuration as provconf
 from neutron_lbaas.db.loadbalancer import loadbalancer_db
 from neutron_lbaas.services.loadbalancer.drivers import abstract_driver
 
 LOG = logging.getLogger(__name__)
 
+POOL_SCHEDULERS = 'pool_schedulers'
+
 AGENT_SCHEDULER_OPTS = [
     cfg.StrOpt('loadbalancer_pool_scheduler_driver',
                default='neutron_lbaas.services.loadbalancer.agent_scheduler'
@@ -326,8 +329,9 @@ class AgentDriverBase(abstract_driver.LoadBalancerAbstractDriver):
         self.plugin.agent_notifiers.update(
             {q_const.AGENT_TYPE_LOADBALANCER: self.agent_rpc})
 
-        self.pool_scheduler = importutils.import_object(
-            cfg.CONF.loadbalancer_pool_scheduler_driver)
+        pool_sched_driver = provconf.get_provider_driver_class(
+            cfg.CONF.loadbalancer_pool_scheduler_driver, POOL_SCHEDULERS)
+        self.pool_scheduler = importutils.import_object(pool_sched_driver)
 
     def _set_callbacks_on_plugin(self):
         # other agent based plugin driver might already set callbacks on plugin

setup.cfg

@@ -31,6 +31,15 @@ setup-hooks =
 [entry_points]
 console_scripts =
     neutron-lbaas-agent = neutron_lbaas.services.loadbalancer.agent.agent:main
+device_drivers =
+    # These are for backwards compat with Juno loadbalancer service provider configuration values
+    neutron.services.loadbalancer.drivers.a10networks.driver_v1.ThunderDriver = neutron_lbaas.services.loadbalancer.drivers.a10networks.driver_v1:ThunderDriver
+    neutron.services.loadbalancer.drivers.embrane.driver.EmbraneLbaas = neutron_lbaas.services.loadbalancer.drivers.embrane.driver:EmbraneLbaas
+    neutron.services.loadbalancer.drivers.haproxy.plugin_driver.HaproxyOnHostPluginDriver = neutron_lbaas.services.loadbalancer.drivers.haproxy.plugin_driver:HaproxyOnHostPluginDriver
+    neutron.services.loadbalancer.drivers.netscaler.netscaler_driver.NetScalerPluginDriver = neutron_lbaas.services.loadbalancer.drivers.netscaler.netscaler_driver:NetScalerPluginDriver
+    neutron.services.loadbalancer.drivers.radware.driver.LoadBalancerDriver = neutron_lbaas.services.loadbalancer.drivers.radware.driver:LoadBalancerDriver
+pool_schedulers =
+    neutron.services.loadbalancer.agent_scheduler.ChanceScheduler = neutron_lbaas.services.loadbalancer.agent_scheduler:ChanceScheduler
 
 [build_sphinx]
 all_files = 1