Keepalived is a routing software written in C and Keepalived is free software.

Step1. Install packages

yum install -y wget   gcc  openssl-devel.x86_64 libnl3-devel

Step2. Download software

wget https://www.keepalived.org/software/keepalived-2.0.19.tar.gz

Step3. Untar Packages

tar -xvf keepalived-2.0.19.tar.gz

Step4. Configure tool

cd keepalived-2.0.19/
./configure
make
make install

Step5. Check service status

systemctl status keepalive

Step6. Add Server in Loadbalancer

cd /usr/local/etc/keepalived
vi keepalived.conf
 
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.106.128
        192.168.106.129
            }
}

Step7. Restart service

systemctl status keepalive
systemctl start keepalive
systemctl enable keepalive

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