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global_defs {
router_id NatRouter
}
vrrp_script check_nat_gateway {
script “pidof keepalived”
interval 2
weight -1
}
vrrp_instance NatGateway {
state MASTER
interface eth0
virtual_router_id 1
priority 100
advert_int 1
authentication {
auth_type PASS auth_pass YourPasswordHere
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}
virtual_ipaddress {
192.168.1.1/24
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}
track_script {
check_nat_gateway
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}
}
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net.ipv4.ip_forward=1
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sudo sysctl -p
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sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
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sudo iptables-save | sudo tee /etc/iptables/rules.v4
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sudo service keepalived start
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“How To Set Up a High Availability Rolling Update NAT Gateway with Keepalived and HAproxy on Ubuntu 14.04 | DigitalOcean” (https://www.digitalocean.com/community/tutorials/how-to-set-up-a-high-availability-rolling-update-nat-gateway-with-keepalived-and-haproxy-on-ubuntu-14-04)
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