cloud-foundation-fabric/blueprints/networking/glb-hybrid-neg-internal/data/nva-startup-script.tftpl

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#!/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.
echo 'Enabling IP forwarding'
sed '/net.ipv4.ip_forward=1/s/^#//g' -i /etc/sysctl.conf &&
sysctl -p /etc/sysctl.conf &&
/etc/init.d/procps restart
echo 'Setting routes'
ip route add ${spoke-primary} via ${gateway-trusted} dev ens5
ip route add ${spoke-secondary} via ${gateway-trusted} dev ens5
echo 'Setting NAT masquerade, so that HCs can reach the spoke through the NVA using the trusted intf source IP'
iptables \
-t nat \
-A POSTROUTING \
-s 130.211.0.0/22,35.191.0.0/16 \
-d ${spoke-primary} \
-p tcp \
--dport 80 \
-j MASQUERADE
iptables \
-t nat \
-A POSTROUTING \
-s 130.211.0.0/22,35.191.0.0/16 \
-d ${spoke-secondary} \
-p tcp \
--dport 80 \
-j MASQUERADE