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#!/bin/bash
# This example script creates bonding network devices based on synthetic NIC
# (the virtual network adapter usually provided by Hyper-V) and the matching
# VF NIC (SRIOV virtual function). So the synthetic NIC and VF NIC can
# function as one network device, and fail over to the synthetic NIC if VF is
# down.
#
# Usage:
# - After configured vSwitch and vNIC with SRIOV, start Linux virtual
# machine (VM)
# - Run this scripts on the VM. It will create configuration files in
# distro specific directory.
# - Reboot the VM, so that the bonding config are enabled.
#
# The config files are DHCP by default. You may edit them if you need to change
# to Static IP or change other settings.
#
sysdir=/sys/class/net
netvsc_cls={f8615163-df3e-46c5-913f-f2d2f965ed0e}
bondcnt=0
# Detect Distro
if [ -f /etc/redhat-release ];
then
cfgdir=/etc/sysconfig/network-scripts
distro=redhat
elif grep -q 'Ubuntu' /etc/issue
then
cfgdir=/etc/network
distro=ubuntu
elif grep -q 'SUSE' /etc/issue
then
cfgdir=/etc/sysconfig/network
distro=suse
else
echo "Unsupported Distro"
exit 1
fi
echo Detected Distro: $distro, or compatible
# Get a list of ethernet names
list_eth=(`cd $sysdir && ls -d */ | cut -d/ -f1 | grep -v bond`)
eth_cnt=${#list_eth[@]}
echo List of net devices:
# Get the MAC addresses
for (( i=0; i < $eth_cnt; i++ ))
do
list_mac[$i]=`cat $sysdir/${list_eth[$i]}/address`
echo ${list_eth[$i]}, ${list_mac[$i]}
done
# Find NIC with matching MAC
for (( i=0; i < $eth_cnt-1; i++ ))
do
for (( j=i+1; j < $eth_cnt; j++ ))
do
if [ "${list_mac[$i]}" = "${list_mac[$j]}" ]
then
list_match[$i]=${list_eth[$j]}
break
fi
done
done
function create_eth_cfg_redhat {
local fn=$cfgdir/ifcfg-$1
rm -f $fn
echo DEVICE=$1 >>$fn
echo TYPE=Ethernet >>$fn
echo BOOTPROTO=none >>$fn
echo UUID=`uuidgen` >>$fn
echo ONBOOT=yes >>$fn
echo PEERDNS=yes >>$fn
echo IPV6INIT=yes >>$fn
echo MASTER=$2 >>$fn
echo SLAVE=yes >>$fn
}
function create_eth_cfg_pri_redhat {
create_eth_cfg_redhat $1 $2
}
function create_bond_cfg_redhat {
local fn=$cfgdir/ifcfg-$1
rm -f $fn
echo DEVICE=$1 >>$fn
echo TYPE=Bond >>$fn
echo BOOTPROTO=dhcp >>$fn
echo UUID=`uuidgen` >>$fn
echo ONBOOT=yes >>$fn
echo PEERDNS=yes >>$fn
echo IPV6INIT=yes >>$fn
echo BONDING_MASTER=yes >>$fn
echo BONDING_OPTS=\"mode=active-backup miimon=100 primary=$2\" >>$fn
}
function create_eth_cfg_ubuntu {
local fn=$cfgdir/interfaces
echo $'\n'auto $1 >>$fn
echo iface $1 inet manual >>$fn
echo bond-master $2 >>$fn
}
function create_eth_cfg_pri_ubuntu {
local fn=$cfgdir/interfaces
create_eth_cfg_ubuntu $1 $2
echo bond-primary $1 >>$fn
}
function create_bond_cfg_ubuntu {
local fn=$cfgdir/interfaces
echo $'\n'auto $1 >>$fn
echo iface $1 inet dhcp >>$fn
echo bond-mode active-backup >>$fn
echo bond-miimon 100 >>$fn
echo bond-slaves none >>$fn
}
function create_eth_cfg_suse {
local fn=$cfgdir/ifcfg-$1
rm -f $fn
echo BOOTPROTO=none >>$fn
echo STARTMODE=auto >>$fn
}
function create_eth_cfg_pri_suse {
create_eth_cfg_suse $1
}
function create_bond_cfg_suse {
local fn=$cfgdir/ifcfg-$1
rm -f $fn
echo BOOTPROTO=dhcp >>$fn
echo STARTMODE=auto >>$fn
echo BONDING_MASTER=yes >>$fn
echo BONDING_SLAVE_0=$2 >>$fn
echo BONDING_SLAVE_1=$3 >>$fn
echo BONDING_MODULE_OPTS=\'mode=active-backup miimon=100 primary=$2\' >>$fn
}
function create_bond {
local bondname=bond$bondcnt
local primary
local secondary
local class_id1=`cat $sysdir/$1/device/class_id 2>/dev/null`
local class_id2=`cat $sysdir/$2/device/class_id 2>/dev/null`
if [ "$class_id1" = "$netvsc_cls" ]
then
primary=$2
secondary=$1
elif [ "$class_id2" = "$netvsc_cls" ]
then
primary=$1
secondary=$2
else
return 0
fi
echo $'\nBond name:' $bondname
echo configuring $primary
create_eth_cfg_pri_$distro $primary $bondname
echo configuring $secondary
create_eth_cfg_$distro $secondary $bondname
echo creating: $bondname with primary slave: $primary
create_bond_cfg_$distro $bondname $primary $secondary
let bondcnt=bondcnt+1
}
for (( i=0; i < $eth_cnt-1; i++ ))
do
if [ -n "${list_match[$i]}" ]
then
create_bond ${list_eth[$i]} ${list_match[$i]}
fi
done
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