Revision as of 16:23, 26 November 2014

Overview

This wiki page describes how to tune Mellanox OpenStack on Ubuntu 12.04 servers

Prerequisites

• A running OpenStack environment installed with the ML2 plugin on top of OVS.
• All nodes equipped with Mellanox ConnectX®-3 Network Adapter (http://www.mellanox.com/page/products_dyn?product_family=119)
• Mellanox OFED 2.2 or greater installed on all nodes. Please refer to Mellanox website for the latest OFED: http://www.mellanox.com/page/products_dyn?product_family=26&mtag=linux_sw_drivers
• SR-IOV enabled on all compute nodes. For more information, please refer to Mellanox Community click here.
• The software package iproute2 - (http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2 ) installed on all Compute nodes
• VLANs configured on the ports in the switch.

Ethernet Network

Controller Node

In /etc/nova/nova.conf ensure you have the following line:

  security_group_api=nova

If the value is changed, restart the Nova services:

  # for i in $(initctl list | grep '^nova' | awk '{print $1}'); do service $i restart; done

Neutron Server Node

NOTE: The Neutron Server can sometimes be part of the Controller node.

To configure Neutron-Server node:

1. Edit /etc/neutron/neutron.conf, and make sure Neutron is using ML2 plugin:

[DEFAULT]
core_plugin = neutron.plugins.ml2.plugin.Ml2Plugin

2. Modify the ML2 configuration file (/etc/neutron/plugins/ml2/ml2_conf.ini) as follows:

[ml2]
type_drivers = vlan,flat
tenant_network_types = vlan
mechanism_drivers = openvswitch,mlnx  
[ml2_type_vlan]
network_vlan_ranges=<physical_network>:<min_vlan>:<max_vlan> //(i.e. default:2:10)   
[securitygroup]
enable_security_group = True   
[eswitch]
vnic_type = hostdev
apply_profile_patch = True

3. Install the required Deb for the Mellanox Neutron plugin (from Ubuntu’s repository):

apt-get install neutron-plugin-mlnx-agent

4. Edit /etc/neutron/plugins/mlnx/mlnx_conf.ini to match your environment:

[mlnx]
network_vlan_ranges = <physical_network>:<min_vlan:<max_vlan> //(i.e. default:2:10)
tenant_network_type = vlan 
[eswitch]
physical_interface_mappings = <physical_network>:<eth interface> //(i.e. default:eth0)
vnic_type = hostdev
[agent]
support_old_agents = True

5. Restart neutron-server:

/etc/init.d/neutron-server start

Compute Nodes

To configure Compute nodes:

1. Download mlnxvif and eSwitch Daemon (eSwitchd) from the following link:

http://www.mellanox.com/downloads/solutions/openstack/icehouse/debian/

2. Install the Mellanox plugin services mlnxvif and eSwitchd:

dpkg –i python-mlnxvif_2014.1.1-1_all.deb
dpkg –i python-eswitchd_0.10-1_all.deb

3. Edit /etc/eswitchd/eswitchd.conf as follows:

[DAEMON]
fabrics=<physical_network>:<eth-interface> //(i.e. default:eth0)

4. Edit /etc/nova/nova.conf as follows:

[DEFAULT]
compute_driver = libvirt.LibvirtDriver
libvirt_vif_driver = mlnxvif.vif.MlxEthVIFDriver
security_group_api = nova

5. Check if “ebrctl” appears in one of Nova’s rootwrap files:

grep 'ebrctl' /etc/nova/rootwrap.d/*

If “ebrctl” does not appear in one of Nova’s rootwrap files, edit the file /etc/nova/rootwrap.d/compute.filters as follows:

[Filters]
ebrctl: CommandFilter, ebrctl, root

6. Install the Neutron Mellanox agent (from Ubuntu repository):

apt-get install neutron-plugin-mlnx-agent

7. Copy /etc/neutron/plugins/mlnx/mlnx_conf.ini from the Neutron Server node to the same path on each Compute node. 8. Restart the following services:

/etc/init.d/nova-compute restart
/etc/init.d/eswitchd start
/etc/init.d/neutron-plugin-mlnx-agent start

Network Node

1. Install the Neutron Linux bridge plugin, the Neutron DHCP agent and the Neutron L3 agent:

 # apt-get install neutron-plugin-linuxbridge-agent neutron-dhcp-agent neutron-l3-agent

2. Copy /etc/neutron/neutron.conf from the Compute node.

3. Change the following configuration of the ini file (/etc/neutron/plugins/linuxbridge/linuxbridge_conf.ini). The "default" in the example is the name of the physical network as configured in /etc/neutron/plugins/mlnx/mlnx_conf.ini .

  [linux_bridge]  
  physical_interface_mappings = default:eth2 

4. Configure the DHCP agent according to the following guidelines

Update the following file: /etc/neutron/dhcp_agent.ini with:

  [DEFAULT] 
 interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver 

For additional information refer to the OpenStack documentation

5. Configure the L3 agent according to the following guidelines

Update the following file: /etc/neutron/l3_agent.ini with:

  [DEFAULT] 
 interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver 

For additional information refer to the OpenStack documentation

6. Configure the Metadata agent according to the OpenStack documentation

7. Start the Neutron Linux Bridge, DHCP and L3 agents

 # restart neutron-plugin-linuxbridge-agent
 # restart neutron-dhcp-agent
 # restart neutron-l3-agent
 # restart neutron-metadata-agent

Troubleshooting

• If you're seeing request timeout errors in the plugin's logs, make sure that the eswitchd service is started and try to increase the request_timeout value in the plugin configuration file.