High Availability Mode of Trisul ensures that a Trisul cluster always alive in the event of a single node failure. This article describes how it can be configured step by step.

It is a Linux implementation of the VRRP Protocol which allows for establishing a Virtual IP. We will be using HA based on VRRP protocol in this article.

iptables DNAT rule

dnf install iptables iptables-services

iptables -t nat -A PREROUTING \
    -p udp -m udp --dport 2055 -j DNAT \
        --to-destination 10.10.100.116

systemctl start iptables

systemctl enable iptables

Make it persistent

iptables-save > /etc/sysconfig/iptables

To list the NAT rule

iptables -t nat -v -L -n –line-number

to delete

iptables -t nat -D PREROUTING 1