Debian & ubuntu sudo apt install keepalived

sudo apt install libipset13

Configuration

Find your IP

ip a

edit your config

sudo nano /etc/keepalived/keepalived.conf

First node

vrrp_instance VI_1 {

state MASTER

interface ens18

virtual_router_id 55

priority 150

advert_int 1

unicast_src_ip 192.168.30.31

unicast_peer {

192.168.30.32

}

authentication {

auth_type PASS

auth_pass C3P9K9gc

}

virtual_ipaddress {

192.168.30.100/24

}

}

Second node

vrrp_instance VI_1 {

state BACKUP

interface ens18

virtual_router_id 55

priority 100

advert_int 1

unicast_src_ip 192.168.30.32

unicast_peer {

192.168.30.31

}

authentication {

auth_type PASS

auth_pass C3P9K9gc

}

virtual_ipaddress {

192.168.30.100/24

}

}

Start and enable the service

sudo systemctl enable --now keepalived.service

stopping the service

sudo systemctl stop keepalived.service

get the status

sudo systemctl status keepalived.service

Make sure to change ip and auth pass.

Enjoy

On the router.

My router is locked down so i assign the vrrp address to wach client (pain in the ass) but it works.

Pivpn takes care or wireguard too.

2 pihole instances 1 pi5 1 pi4 Keepalived provides vrrp at a set address.

Instances kept in sync via orbital

1 goes down the other takes over.

Quite elegantly.

Lighttpd ran into a dns issue mid update. And it dif not complet and left the aformentioned webserver running.

Removed with apt and voilla.