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Mellanox-Neutron-Icehouse-Redhat

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Overview

Mellanox Neutron ML2 Driver

Mellanox ML2 Mechanism Driver implements the ML2 Plugin Mechanism Driver API.

This driver supports Mellanox embedded switch functionality as part of the VPI (Ethernet/InfiniBand) HCA. Mellanox ML2 Mechanism Driver provides functional parity with Mellanox Neutron pluign.

Mellanox ML2 Mechanism Driver supports DIRECT (pci passthrough) and MACVTAP (virtual interface with a tap-like software interface) vnic types. For vnic type configuration API details, please refer to configuration reference guide http://docs.openstack.org/api/openstack-network/2.0/content/binding_ext_ports.html. Hardware vNICs mapped to the guest VMs allow higher performance and advanced features such as RDMA (remote direct memory access).

The driver supports VLAN network type to facilitate virtual networks either on Ethernet or InfiniBand fabrics.

  • Mellanox Openstack Neutron Agent (L2 Agent) runs on each compute node.
  • Agent should apply VIF connectivity based on mapping between a VIF (VM vNIC) and Embedded Switch port.

Mellanox Neutron Plugin

Please note, Mellanox Plug-in is deprecated in the Icehouse release and won't be supported in the Juno release. The features in the plug-in are now part of the ML2 plug-in in the form of Mellanox mechanism driver.

For details regarding Mellanox Neutron plugin, please refer to https://wiki.openstack.org/wiki/Mellanox-Neutron-Havana-Redhat.

Mellanox Nova VIF Driver

The Mellanox Nova VIF driver should be used when running Mellanox Mechnism Driver. The VIF driver supports the VIF plugin by binding vNIC of type DIRECT to the embedded switch port. VIF Driver for MACVTAP type is included in Nova libvirt generic vif driver. For SR-IOV pass-through (vnic type DIRECT) one needs to use VIF driver from Mellanox git repository or RPM.

Prerequisites

Installation with Red Hat Enterprise Linux OpenStack Platform

Make sure you follow Red Hat prerequisites as required by Red Hat Enterprise Linux OpenStack Platform. Please refer to https://access.redhat.com/products/Cloud/OpenStack/ for additional information regarding this product.

Other Red Hat references:

1. RHOS reference document

2. RDO QuickStart


Neutron server

No special prerequisites needed.


Compute Nodes

1. python-pip (use "yum install python-pip")

2. Compute nodes should be equipped with Mellanox ConnectX®-3 Network Adapter (link)

3. Mellanox OFED 2.0.3 or greater is installed.Refer to Mellanox website for the latest OFED ([1])

4. Enable SR-IOV on ConnectX-3 card. Refer to Mellanox Community

5. The software package iproute2 - (Code Documentation) must be installed. Required only to be installed on compute nodes

6. oslo.config (use "pip-python install oslo.config"). Reuired only to be installed on compute nodes.


Network Node

1. Network node should be equipped with Mellanox ConnectX®-3 Network Adapter (link)

2. Mellanox OFED 2.0.3 or greater is installed. Refer to Mellanox website for the latest OFED ([2])

Ethernet Network

Neutron Server Node

Installation

1. Make sure ML2 plugin is the current Neutron plugin by checking core_plugin option in neutron.conf:

  core_plugin = neutron.plugins.ml2.plugin.Ml2Plugin

2. Make sure /etc/neutron/plugin.ini is pointing at /etc/neutron/plugins/ml2/ml2_conf.ini

3.Modify /etc/neutron/plugins/ml2/ml2_conf.ini and include the following:

[ml2]
type_drivers = vlan,flat
tenant_network_types = vlan
mechanism_drivers = mlnx,openvswitch
[ml2_type_vlan]
network_vlan_ranges = default:2:100
[eswitch]
vnic_type = hostdev
apply_profile_patch = True

Click here for ML2 configuration options.

Start Services

Start (or restart) the Neutron server

  #service neutron-server restart

Compute Nodes

Installation

1. If you didn't download Mellanox OpenStack repo file download it :

#wget http://www.mellanox.com/downloads/solutions/openstack/icehouse/repo/mlnx-icehouse/mlnx-icehouse.repo

2. Install the eswitchd RPM:

#yum install eswitchd

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)

#yum install mlnxvif

4. Install the required RPM for the Neutron agent:

#yum install openstack-neutron-mellanox

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
   vif_driver=mlnxvif.vif.MlxEthVIFDriver
   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:

   vif_driver=nova.virt.libvirt.vif.LibvirtGenericVIFDriver

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

  [AGENT]
  polling_interval - Polling interval (in seconds) for existing vNICs. The default is 2 seconds.
  rpc  - must be set to '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 relevant 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".  
  daemon_endpoint - eswitch daemon end point connection (URL) (default value='tcp://127.0.0.1:60001')
  request_timeout - the number of milliseconds the agent will wait for response on request to daemon. (default=3000 msec)

For a plugin configuration file example (Icehouse), please refer to Mellanox config ini file.

Start Services

1. Restart Nova.

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

2. Start eswitch Daemon

   #/etc/init.d/eswitchd start

3. Start the Neutron agent

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

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


Network Node

1. Install Neutron Open vSwitch Agent, Neutron dhcp Agent and l3 Agent:

  #yum install openstack-neutron-openvswitch

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

  bridge_mappings = default:br-eth3,public:br-ex 

(Here public is the physical external network)

3. Configure the DHCP server according to the following guidelines

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

  interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver 

For additional information refer to: http://docs.openstack.org/trunk/openstack-network/admin/content/adv_cfg_dhcp_agent.html

4. Start the DHCP server

  #//etc/init.d/neutron-openvswitch-agent start
  #/etc/init.d/neutron-dhcp-agent start

5.Configure the l3 agent configuration file /etc/neutron/l3_agent.ini

   gateway_external_network_id = d4fdfebb-e027-4acd-bed4-1d96e896f336
   router_id = 41bf1aa0-3daf-4f51-9d23-0a4b15020c36
   interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
   external_network_bridge = br-ex

The above is an example for configuring one router for tenants. Your values for gateway_external_network_id,router_id and external_network_bridge may differ.

InfiniBand Network

The Mellanox Neutron Plugin use InfiniBand Partitions (PKeys) to separate Networks.

SM Configuration

OpenSM configuration - Without UFM

All the PKeys should be predefined in the partitions.conf file (/etc/opensm/partitions.conf) (Automatic cofiguration is planned in future phase)

Add/Change the following in the partitions.conf file

  management=0xffff,ipoib, sl=0, defmember=both : ALL, ALL_SWITCHES=full,SELF=full;

For every network you want to configure in Neutron you have to configure the pkey associated with the VLAN of this network (defined in Neutron).

  vlan1=0x1, ipoib, sl=0, defmember=full : ALL;

For example: If we have 10 VLANs defined in configuration in /etc/neutron/plugins/mlnx/mlnx_conf.ini

  [MLNX]
  network_vlan_ranges = default:1:10

We'll have the following configuration of the the partitions.conf file:

  management=0x7fff,ipoib, sl=0, defmember=full : ALL, ALL_SWITCHES=full,SELF=full;
  vlan1=0x1, ipoib, sl=0, defmember=full : ALL;
  vlan2=0x2, ipoib, sl=0, defmember=full : ALL;
  vlan3=0x3, ipoib, sl=0, defmember=full : ALL;
  vlan4=0x4, ipoib, sl=0, defmember=full : ALL;
  vlan5=0x5, ipoib, sl=0, defmember=full : ALL;
  vlan6=0x6, ipoib, sl=0, defmember=full : ALL;
  vlan7=0x7, ipoib, sl=0, defmember=full : ALL;
  vlan8=0x8, ipoib, sl=0, defmember=full : ALL;
  vlan9=0x9, ipoib, sl=0, defmember=full : ALL;
  vlan10=0xa, ipoib, sl=0, defmember=full : ALL;

Change the following in /etc/opensm/opensm.conf:

  allow_both_pkeys TRUE


Restart the openSM

  #/etc/init.d/opensmd restart

OpenSM configuration - With UFM

1. Make sure UFM is installed and connected to your fabric.

2. Edit /opt/ufm/conf/opensm/opensm.conf and change the following values:

a) set allow_both_pkeys to TRUE (by default allow_both_pkeys are FALSE):

  #Allow both full and limited membership on the same partition
  allow_both_pkeys TRUE

b) set sm_assign_guid_func to uniq_count (by default sm_assign_guid_func is base_port)

  #SM assigned Alias GUIDs algorithm
  sm_assign_guid_func uniq_count

3. Edit UFM user extension partitions.conf for overriding default partitioning configuration.

a) Edit file: /opt/ufm/conf/partitions.conf.user_ext (it should be empty after UFM fresh installation)

b) add the following line to file which enable both full and limited management pkey:

  management=0xffff,ipoib, sl=0, defmember=both : ALL, ALL_SWITCHES=full,SELF=full;

c) Add the additional pkeys definitions which are relevant to the specific setup - for example:

  vlan1=0x1, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan2=0x2, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan3=0x3, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan4=0x4, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan5=0x5, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan6=0x6, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan7=0x7, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan8=0x8, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan9=0x9, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan10=0xa, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan10=0xb, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan10=0xc, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan10=0xd, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan10=0xe, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan10=0xf, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan10=0x10, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan10=0x11, ipoib, sl=0, defmember=full : ALL_CAS;
  vlan10=0x12, ipoib, sl=0, defmember=full : ALL_CAS;

4. Restart UFM

Stand-alone

  /etc/init.d/ufmd restart

High-availability

  /etc/init.d/ufmha restart

Neutron Server Node

SR-IOV

SR-IOV is a passthrough mode. Change the following in the file /etc/neutron/plugins/mlnx/mlnx_conf.ini

  tenant_network_type = ib
  vnic_type = hostdev
  network_vlan_ranges = default:1:10 
  (sql_connection and reconnect_interval  can be configured as described above)

The mapping between VLAN and PKEY is as follows: VLAN X = PKEY 0x8000 + X. For example: vlan 2 is pkey 0x8002

Para-Virtualized

On the controller, configure the file /etc/neutron/plugins/mlnx/mlnx_conf.ini

  tenant_network_type = ib
  vnic_type = bridge

Compute Nodes

SR-IOV

SR-IOV is a passthrough mode. Perform the following changes:

Create the file /etc/modprobe.d/mlx4_ib.conf and put:

   options mlx4_ib sm_guid_assign=0

In The file /etc/neutron/plugins/mlnx/mlnx_conf.ini

   physical_interface_mapping = default:autoib

Tenant_network_type , vnic_type and network_vlan_ranges parameters should be configured as the controller.

autoib can be replaced by the name of the PF.

Change the file /etc/eswitchd/eswitchd.conf

  fabrics  = default:autoib (or default:ib0)

The driver should be restarted

   /etc/init.d/openibd restart

eswitchd should be started and then Neutron agent should be started

  /etc/init.d/eswitchd restart
  /etc/init.d/neutron-mlnx-agent restart

Verify Mellanox VIF driver is configured in /etc/nova/nova.conf

  libvirt_vif_driver=mlnxvif.vif.MlxEthVIFDriver

Restart nova

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

Para-Virtualized

Here we use the Linux Bridge plugin.

eIPoIB module should be up and configured.In /etc/infiniband/openib.conf:

E_IPOIB_LOAD=yes

And restart openibd:

#/etc/init.d/openibd restart

Please refer to eIPoIB configuration in Mellanox OFED User Manual

Once we have the eIPoIB interface, we use it in the linux bridge agent configuration:

For Example: Assuming eth1 is the eIPoIB interface:

To check that the interface type is eIPoIB run the command (verify that the driver is "eth_ipoib")

  #ethtool -i <interface> 
  driver: eth_ipoib
  version: 1.0.0
  firmware-version: 1 
  bus-info: ib0
  supports-statistics: yes
  supports-test: no
  supports-eeprom-access: no
  supports-register-dump: no
  supports-priv-flags: no

Change the file /etc/neutron/plugins/linuxbridge/linuxbridge_conf.ini

  [linux_bridge] 
  physical_interface_mappings =  default:eth1   

Configure the Linux Bridge VIF Driver in /etc/nova/nova.conf

  #libvirt_vif_driver=nova.virt.libvirt.vif.NeutronLinuxBridgeVIFDriver

Restart nova

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

After confiuration Linux Bridge agent should be restarted.

  #/etc/init.d/neutron-linuxbridge-agent restart

Network Node

Configure the Linux bridge plugin as described in InfiniBand Para-Virtualized section (above).

DHCP Server

For DHCP support – The Network node should use the Mellanox Dnsmasq driver as the DHCP driver.

   # yum install mlnx-dnsmasq

Change the following in /etc/neutron/dhcp_agent.ini

  dhcp_driver = mlnx_dhcp.MlnxDnsmasq

Copy ipoibd and override /sbin/ipoibd

  #wget http://www.mellanox.com/downloads/solutions/openstack/havana/ipoibd
  #cp ipoibd /sbin/ipoibd
  Note: If you have OFED >= 2.1 the above step is not needed

Download and apply a patch for Linux Bridge Agent:

  #wget http://www.mellanox.com/downloads/solutions/openstack/havana/patches/linuxbridge_neutron_agent.py.patch
  #cd /usr/lib/python2.6/site-packages/neutron/plugins/linuxbridge/agent
  #patch -p1 < linux_bridge_agent.py.patch 

Restart openibd

  #/etc/init.d/openibd restart

Start linux bridge agent

  /etc/init.d/neutron-linuxbridge-agent restart

Start dhcp server

  /etc/init.d/neutron-dhcp-agent restart

Usage Examples

Known issues and Troubleshooting

For known issues and troubleshooting options refer to Mellanox OpenStack Troubleshooting.

References

1. http://www.mellanox.com/openstack/

2. Source repository

3. Mellanox OFED

4. Mellanox OpenStack Solution Reference Architecture

5. Mellanox OpenStack Troubleshooting

For more details, please refer your question to openstack@mellanox.com

Return to Mellanox-OpenStack wiki page.