Revision as of 16:19, 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

Installation

1. If you didn't download Mellanox OpenStack debian files download it :

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

2. Install the eswitchd debian files:

  dpkg -i eswitchd_0.8-1_amd64.deb
  dpkg -i python-mlnxvif_0.6-1_all.deb
  apt-get install -f # fix dependencies
  apt-get install -y neutron-plugin-mlnx-agent

3. In case you would like to use Ethernet in para-virtualized mode the VIF driver is already included in Nova package. Otherwise, Install Mellanox VIF driver (Make sure nova is installed on your server)

Configuration

1. Configure /etc/eswitchd/eswitchd.conf if needed

Please Refer to Mellanox Community for the eSwitchd installation notes ( click here)

2. Modify /etc/nova/nova.conf

  compute_driver=nova.virt.libvirt.driver.LibvirtDriver
  libvirt_vif_driver=mlnxvif.vif.MlxEthVIFDriver
  security_group_api=nova
  connection_type=libvirt

In case you didn't install the Mellanox VIF driver, and you plan to use Ethernet only in paravirtualized ,mode: change the following:

  libvirt_vif_driver=nova.virt.libvirt.vif.LibvirtGenericVIFDriver

3. Modify the /etc/neutron/plugins/mlnx/mlnx_conf.ini file to reflect your environment.

 [AGENT]
 rpc_support_old_agents = True
 [ESWITCH]
  physical_interface_mapping -  the network_interface_mappings maps each physical network name to the physical interface (on top of Mellanox Adapter) connecting the node to that physical network. The format of this paramter is:     <fabric name>:< PF name> (Only releavant on Compute node). PF Name can either be the PF (Physical Function) Name or 'autoeth' for automatic Ethernet configuration,'autoib' for automatic Infiniband configuration.The default is  "default:autoeth".  
  vnic_type - type of VM network interface: 'mlnx_direct' or 'hostdev'  according to libvirt terminology.
       hostdev: this is the traditional method of assigning any generic PCI device to a guest (SR-IOV).
       mlnx_direct: this is a method to provide macvtap device on top of the PCI device (default).
       bridge:  - When using Linux Bridge Plugin on top of eIPoIB device
  daemon_endpoint - 'tcp://127.0.0.1:60001'

For a plugin configuration file example (Havana), please refer to Mellanox config *ini file (click here)

4. (Optional) Modify /etc/init/neutron-plugin-mlnx-agent.conf as described in LP bug #1257732

5. Check that ebrctl is listed somewhere in /etc/nova/rootwrap.d/*, otherwise add this to /etc/nova/rootwrap.d/compute.filters file in the [Filters] section.

 ebrctl: CommandFilter, ebrctl, root

Start Services

1. Restart Nova.

 #/etc/init.d/nova-compute restart

2. Start eswitch Daemon

  #/etc/init.d/eswitchd start

3. Start the Neutron agent

 #/etc/init.d/neutron-plugin-mlnx-agent start

Note: eswitch Daemon should be running before the Neutron Agent is started.

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