cloudstack/patches/systemvm/debian/config/opt/cloud/bin/cloud-nic.sh

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#!/usr/bin/env bash
plug_nic() {
sudo echo "$tableNo $tableName" >> /etc/iproute2/rt_tables 2>/dev/null
sudo ip rule add fwmark $tableNo table $tableName 2>/dev/null
sudo ip route flush table $tableName
sudo ip route flush cache
}
unplug_nic() {
sudo iptables -t mangle -D PREROUTING -i $dev -m state --state NEW -j CONNMARK --set-mark $tableNo 2>/dev/null
sudo ip rule del fwmark $tableNo 2>/dev/null
sudo ip route flush table $tableName
sudo sed -i /"$tableNo $tableName"/d /etc/iproute2/rt_tables 2>/dev/null
sudo ip route flush cache
# remove network usage rules
sudo iptables -t mangle -F NETWORK_STATS_$dev 2>/dev/null
iptables-save -t mangle | grep NETWORK_STATS_$dev | grep "\-A" | while read rule
do
rule=$(echo $rule | sed 's/\-A/\-D/')
sudo iptables -t mangle $rule
done
sudo iptables -t mangle -X NETWORK_STATS_$dev 2>/dev/null
# remove rules on this dev
iptables-save -t mangle | grep $dev | grep "\-A" | while read rule
do
rule=$(echo $rule | sed 's/\-A/\-D/')
sudo iptables -t mangle $rule
done
iptables-save | grep $dev | grep "\-A" | while read rule
do
rule=$(echo $rule | sed 's/\-A/\-D/')
sudo iptables $rule
done
# remove apache config for this eth
rm -f /etc/apache2/conf.d/vhost$dev.conf
}
action=$1
dev=$2
tableNo=${dev:3}
tableName="Table_$dev"
if [ $action == 'add' ]
then
plug_nic
else
unplug_nic
fi