Example systemd scripts to setup SR-IOV on nodes

Signed-off-by Saikrishna Edupuganti <saikrishna.edupuganti@intel.com>

clr-k8s-examples/9-multi-network/README.md

@@ -9,8 +9,12 @@ directories on the host with the necessary binaries and configuration files.
 
 Replace `flannel` configuration in the delegates section with contents of your
 default network's cni configuration in [multus-conf.yaml](clr-k8s-examples/9-multi-network/multus-conf.yaml).
-The device plugin, will discover any SR-IOV enabled devices on the host as per the
-configuration in [sriov-conf.yaml](clr-k8s-examples/9-multi-network/sriov-conf.yaml).
+
+The device plugin will register the SR-IOV enabled devices on the host, specified
+as `rootDevices` in [sriov-conf.yaml](clr-k8s-examples/9-multi-network/sriov-conf.yaml).
+
+> Helper [systemd](clr-k8s-examples/9-multi-network/systemd/sriov.service) example config
+is provided, which enables SR-IOV for the above `rootDevices`
 
 > NOTE: This assumes homogenous nodes in the cluster
 

clr-k8s-examples/9-multi-network/sriov-conf.yaml

@@ -11,7 +11,7 @@ data:
       [
         {
           "resourceName": "sriov",
-          "rootDevices": ["0000:07:00.0"],
+          "rootDevices": ["07:00.0", "07:00.1"],
           "sriovMode": true,
           "deviceType": "netdevice"
         }

clr-k8s-examples/9-multi-network/systemd/sriov.service

@@ -0,0 +1,9 @@
+[Unit]
+Description=Create VFs on ens785f0 ens785f1 interfaces
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/sriov.sh ens785f0 ens785f1
+
+[Install]
+WantedBy=default.target

clr-k8s-examples/9-multi-network/systemd/sriov.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Usage: sriov.sh ens785f0 ens785f1 ...
+
+for pf in "$@"; do
+	echo "Resetting $pf"
+	echo 0 | tee /sys/class/net/$pf/device/sriov_numvfs
+
+	NUM_VFS=$(cat /sys/class/net/$pf/device/sriov_totalvfs)
+	echo "Enabling $NUM_VFS for $pf"
+	echo $NUM_VFS | tee /sys/class/net/$pf/device/sriov_numvfs
+	ip link set $pf up
+	#for ((i = 0 ; i < ${NUM_VFS} ; i++ )); do ip link set $pf vf $i spoofchk off; done
+	for ((i = 0; i < ${NUM_VFS}; i++)); do ip link set dev $pf vf $i state enable; done
+done