Installing and Configuring Keepalived on Debian

How to Install Keepalived on Debian

Install Keepalived

1.Install Required Packages

sudo apt-get update
sudo apt-get install linux-headers-$(uname -r)

2.Install Keepalived

sudo apt-get install keepalived

Setup Keepalived

3.Now create or edit Keepalived configuration /etc/keepalived/keepalived.conf file on Node1

! Configuration File for keepalived
global_defs {
}
vrrp_instance VI_1 {
    state MASTER
    interface ens192
    virtual_router_id 50
    priority 120
    advert_int 1
    virtual_ipaddress {
	192.168.69.200/24
    }
}

4.Now create or edit Keepalived configuration /etc/keepalived/keepalived.conf file on Node2

! Configuration File for keepalived
global_defs {
}
vrrp_instance VI_1 {
    state BACKUP
    interface ens192
    virtual_router_id 50
    priority 110
    advert_int 1
    virtual_ipaddress {
	192.168.69.200/24
    }
}

5.Now create or edit Keepalived configuration /etc/keepalived/keepalived.conf file on Node3

! Configuration File for keepalived
global_defs {
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens192
    virtual_router_id 50
    priority 100
    advert_int 1
    virtual_ipaddress {
	192.168.69.200/24
    }
}

Firewall Settings

6.Edit nftables configurations /etc/nftables.conf to allow VRRP. Add the following content to the input chain

ip protocol vrrp accept

7.Reload nftables

systemctl reload nftables.service

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