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InfiniBand SR-IOV CNI plugin

NIC with SR-IOV capabilities work by introducing the idea of physical functions (PFs) and virtual functions (VFs).

A PF is used by host and VF configurations are applied through the PF. Each VF can be treated as a separate physical NIC and assigned to one container.

Build

To build the plugin binary:

# make

Upon successful build the plugin binary will be available in build/ib-sriov.

Enable SR-IOV

IB-SRIOV-CNI support Mellanox ConnectX®-4/ConnectX®-5/ConnectX®-6 adapter cards.

Using Upstream Mstflint

To enable SR-IOV functionality using upstream mstflint, the following steps are required:

Install Mstflint package.

# yum install -y mstflint

Enable SR-IOV

# lspci | grep Mellanox
02:00.0 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
02:00.1 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]

# mstconfig -d 0000:02:00.0 set SRIOV_EN=1 NUM_OF_VFS=8

Device #1:
----------

Device type:    ConnectX5       
Name:           MCX556A-ECA_Ax  
Description:    ConnectX-5 VPI adapter card; EDR IB (100Gb/s) and 100GbE; dual-port QSFP28; PCIe3.0 x16; tall bracket; ROHS R6
Device:         0000:02:00.0    

Configurations:                              Next Boot       New
         SRIOV_EN                            False(0)       True(1)         
         NUM_OF_VFS                          0              8               

 Apply new Configuration? (y/n) [n] : y
Applying... Done!
-I- Please reboot machine to load new configurations.

Reboot the machine

# reboot

Create SR-IOV VFs

# echo 4 > /sys/class/net/ib0/device/sriov_numvfs

# lspci | grep Mellanox
02:00.0 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
02:00.1 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
02:00.2 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4 Virtual Function]
02:00.3 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4 Virtual Function]
02:00.4 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4 Virtual Function]
02:00.5 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4 Virtual Function]

# ip link show
...
ib2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/infiniband c6:6d:7d:dd:2a:d5 brd ff:ff:ff:ff:ff:ff
ib3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/infiniband 42:3e:07:68:da:fb brd ff:ff:ff:ff:ff:ff
ib4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/infiniband 42:68:f2:aa:c2:27 brd ff:ff:ff:ff:ff:ff
ib5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
...

To change the number of VFs reset the number to 0 then set the needed number

echo 0 > /sys/class/net/ib0/device/sriov_numvfs
echo 8 > /sys/class/net/ib0/device/sriov_numvfs

Using Mellanox OFED

To enable SR-IOV functionality using Mellnaox's OFED, the following steps are required:

1- Enable SR-IOV in the NIC's Firmware.

Installing Mellanox Management Tools (MFT) or mstflint is a pre-requisite, MFT can be downloaded from here, mstflint package available in the various distros and can be downloaded from here.

Use Mellanox Firmware Tools package to enable and configure SR-IOV in firmware

# mst start
Starting MST (Mellanox Software Tools) driver set
Loading MST PCI module - Success
Loading MST PCI configuration module - Success
Create devices

Locate the HCA device on the desired PCI slot

# mst status
MST modules:
------------
    MST PCI module loaded
    MST PCI configuration module loaded
MST devices:
------------
/dev/mst/mt4115_pciconf0         - PCI configuration cycles access.
...

Enable SR-IOV

# mlxconfig -d /dev/mst/mt4115_pciconf0 set SRIOV_EN=1 NUM_OF_VFS=8
...
Apply new Configuration? ? (y/n) [n] : y
Applying... Done!
-I- Please reboot machine to load new configurations.

Reboot the machine

# reboot

2- Enable SR-IOV in the NIC's Driver.

# ibdev2netdev
mlx5_0 port 1 ==> ib0 (Up)
mlx5_1 port 1 ==> ib1 (Down)

# echo 4 > /sys/class/net/ib0/device/sriov_numvfs
# ibdev2netdev -v
0000:02:00.0 mlx5_0 (MT4115 - MT1523X04353) CX456A - ConnectX-4 QSFP fw 12.23.1020 port 1 (ACTIVE) ==> ib0 (Up)
0000:02:00.1 mlx5_1 (MT4115 - MT1523X04353) CX456A - ConnectX-4 QSFP fw 12.23.1020 port 1 (ACTIVE) ==> ib1 (Down)
0000:02:00.5 mlx5_2 (MT4116 - NA)  fw 12.23.1020 port 1 (DOWN  ) ==> ib2 (Down)
0000:02:00.6 mlx5_3 (MT4116 - NA)  fw 12.23.1020 port 1 (DOWN  ) ==> ib3 (Down)
0000:02:00.7 mlx5_4 (MT4116 - NA)  fw 12.23.1020 port 1 (DOWN  ) ==> ib4 (Down)
0000:02:00.2 mlx5_5 (MT4116 - NA)  fw 12.23.1020 port 1 (DOWN  ) ==> ib5 (Down)

# lspci | grep Mellanox
02:00.0 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
02:00.1 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4]
02:00.2 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4 Virtual Function]
02:00.3 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4 Virtual Function]
02:00.4 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4 Virtual Function]
02:00.5 Infiniband controller: Mellanox Technologies MT27700 Family [ConnectX-4 Virtual Function]

# ip link show
...
ib2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/infiniband c6:6d:7d:dd:2a:d5 brd ff:ff:ff:ff:ff:ff
ib3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/infiniband 42:3e:07:68:da:fb brd ff:ff:ff:ff:ff:ff
ib4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/infiniband 42:68:f2:aa:c2:27 brd ff:ff:ff:ff:ff:ff
ib5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
...

To change the number of VFs reset the number to 0 then set the needed number

echo 0 > /sys/class/net/ib0/device/sriov_numvfs
echo 8 > /sys/class/net/ib0/device/sriov_numvfs

Configuration reference

  • name (string, required): the name of the network
  • type (string, required): "ib-sriov"
  • deviceID (string, required): A valid pci address of an InfiniBand SR-IOV NIC's VF. e.g. "0000:03:02.3"
  • guid (string, optional): InfiniBand Guid for VF.
  • pkey (string, optional): InfiniBand pkey for VF, this field is used by ib-kubernetes to add pkey with guid to InfiniBand subnet manager client e.g. Mellanox UFM, OpenSM.
  • ipam (dictionary, optional): IPAM configuration to be used for this network, dhcp is not supported.
  • link_state (string, optional): Enforces link state for the VF. Allowed values: auto, enable, disable.
  • rdmaIsolation (boolean, optional): Enable RDMA network namespace isolation for RDMA workloads. More information about the system requirements to support this mode of operation can be found here
  • ibKubernetesEnabled (bool, optional): Enforces ib-sriov-cni to work with ib-kubernetes.

Note: If rdmaIsolation is set to true, rdma-cni should not be used.

Supported Capabilities / Runtime configurations

ib-sriov supports the following CNI's Capabilities / Runtime Configuration:

  • infinibandGUID (string): Dynamically assign Infiniband GUID to network interface (VF).

Usage

# cat > /etc/cni/net.d/10-ib-sriov.conf <<EOF
{
    "cniVersion": "0.3.1",
    "name": "mynet",
    "type": "ib-sriov",
    "deviceID": "0000:03:02.0",
    "link_state": "enable",
    "rdmaIsolation": true,
    "ibKubernetesEnabled": false,
    "ipam": {
                "type": "host-local",
                "subnet": "10.56.217.0/24",
                "rangeStart": "10.56.217.171",
                "rangeEnd": "10.56.217.181",
                "routes": [
                        { "dst": "0.0.0.0/0" }
                ],
                "gateway": "10.56.217.1"
        }
}

EOF

ib-sriov-cni-1's People

Contributors

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