35 lines
1.7 KiB
Bash
35 lines
1.7 KiB
Bash
#!/bin/bash
|
|
|
|
# Copyright 2023 Google LLC
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
IF_NAME=$1
|
|
IP_LB=$(ip r show table local | grep "$IF_NAME proto 66" | cut -f 2 -d " ")
|
|
|
|
# Sleep while there's no load balancer IP route for this IF
|
|
while [ -z $IP_LB ] ; do
|
|
sleep 2
|
|
IP_LB=$(ip r show table local | grep "$IF_NAME proto 66" | cut -f 2 -d " ")
|
|
done
|
|
|
|
IF_NUMBER=$(echo $IF_NAME | sed -e s/eth//)
|
|
IF_GW=$(curl http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/$IF_NUMBER/gateway -H "Metadata-Flavor: Google")
|
|
IF_IP=$(curl http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/$IF_NUMBER/ip -H "Metadata-Flavor: Google")
|
|
IF_NETMASK=$(curl http://metadata.google.internal/computeMetadata/v1/instance/network-interfaces/$IF_NUMBER/subnetmask -H "Metadata-Flavor: Google")
|
|
IF_IP_PREFIX=$(/var/run/nva/ipprefix_by_netmask.sh $IF_NETMASK)
|
|
grep -qxF "$((200 + $IF_NUMBER)) hc-$IF_NAME" /etc/iproute2/rt_tables || echo "$((200 + $IF_NUMBER)) hc-$IF_NAME" >>/etc/iproute2/rt_tables
|
|
ip route add $IF_GW src $IF_IP dev $IF_NAME table hc-$IF_NAME
|
|
ip route add default via $IF_GW dev $IF_NAME table hc-$IF_NAME
|
|
ip rule add from $IP_LB/32 table hc-$IF_NAME
|