Fix MTU for vxlan segmentation

We need to decrease MTU for VMs when vxlan is used.

Change-Id: I117384313d03e64b4b70ca42d963628bf509aaf2

README.md

@@ -30,7 +30,6 @@ Limitations
 * Supports only environments with Neutron
 * HA for ovsdb feature is not implemented in Lithium release - one instance of ODL controller runs on primary OpenStack controller.
 * L3 traffic managed by neutron agent - lack of drivers in OpenStack Juno.
-* VM live migration not supported by ovsdb
 
 Installation Guide
 ==================
@@ -97,15 +96,10 @@ It is possible to modify process of building plugin by setting environment varia
 Dependencies
 ------------
 
-OpenDaylight controller require Java Runtime Environment. In case of CentOS system it is required to point
-repository where java rpm package can be found. It can be done in Settings tab in Repositories section.
-It is important to assign highest priority to mos repositories (lower number is a higher priority).
+OpenDaylight controller require Java Runtime Environment.
+If you plan to use plugin in environment without internet access or/and CentOS environment modify build command:
 
-![OpenDaylight repositories](./figures/opendaylight-repositories.png "OpenDaylight repositories")
-
-If you plan to use plugin in environment without internet access modify build command:
-
-        INCLUDE_DEPENDENCIES=true fpb --build fuel-plugin-opendaylight/
+     INCLUDE_DEPENDENCIES=true fpb --build fuel-plugin-opendaylight/
 
 Pre build script will try download required dependencies so it become part of the compiled plugin.
 
@@ -126,7 +120,8 @@ To log in to OpenDayligt shell run */opt/opendaylight/bin/client*
 Known issues
 ------------
 
-None.
+* VM live migration not supported by ODL ovsdb
+* ODL ignore MTU size from Neutron and create tap devices for VMs with MTU 1500. Things like Jumbo frames will not work on VMs side.
 
 Release Notes
 -------------
@@ -143,6 +138,10 @@ Release Notes
 
 * Integrate Lithium SR1 with OpenStack Juno.
 
+**0.6.2**
+
+* Fix MTU for vxlan segmentation type.
+
 Development
 ===========
 

deployment_scripts/puppet/manifests/ml2-configuration.pp

@@ -5,6 +5,10 @@ $port = $opendaylight::rest_api_port
 $vni_start = $opendaylight::odl_settings['vni_range_start']
 $vni_end = $opendaylight::odl_settings['vni_range_end']
 
+$neutron_settings = hiera('quantum_settings')
+$network_scheme = hiera('network_scheme', {})
+prepare_network_config($network_scheme)
+
 neutron_plugin_ml2 {
   'ml2/mechanism_drivers':      value => 'opendaylight';
   'ml2_odl/password':           value => 'admin';
@@ -12,9 +16,27 @@ neutron_plugin_ml2 {
   'ml2_odl/url':                value => "http://${address}:${port}/controller/nb/v2/neutron";
 }
 
-if $opendaylight::odl_settings['use_vxlan'] {
-  neutron_plugin_ml2 {
-    'ml2/tenant_network_types':   value => 'vxlan';
-    'ml2_type_vxlan/vni_ranges':   value => "${vni_start}:${vni_end}";
+$segmentation_type = $neutron_settings['L2']['segmentation_type']
+if $segmentation_type != 'vlan' {
+  # MTU need to be static because ODL ignore MTU value from neturon
+  # and always create tap interfaces for VMs with MTU 1500
+  if $opendaylight::odl_settings['use_vxlan'] {
+    neutron_plugin_ml2 {
+      'ml2/tenant_network_types':   value => 'vxlan';
+      'ml2_type_vxlan/vni_ranges':   value => "${vni_start}:${vni_end}";
+    }
+    $mtu = 1450
+  } else {
+    $mtu = 1458
+  }
+
+  neutron_config {
+    'DEFAULT/network_device_mtu':  value => $mtu;
+  }
+
+  file { '/etc/neutron/dnsmasq-neutron.conf':
+      owner   => 'root',
+      group   => 'root',
+      content => template('openstack/neutron/dnsmasq-neutron.conf.erb'),
   }
 }

metadata.yaml

@@ -3,7 +3,7 @@ name: opendaylight
 # Human-readable name for your plugin
 title: OpenDaylight Lithium plugin
 # Plugin version
-version: '0.6.1'
+version: '0.6.2'
 # Description
 description: 'This plugin provides OpenDaylight as a backend for neutron.
 Use the same IP address as for OpenStack Horizon and port 8181 to reach dlux web ui and apidoc explorer.