introduction lvs:
lvs is a kind of L4 load balancer.
some references here: howto
keepalived:
keepalived is a facilitator for lvs
configuration topology:
DIP: 192.168.2.172
RIP[1]: 192.168.2.173
RIP[2]: 192.168.2.174
VIP: 192.168.2.175
lvs only director side
#install ipvsadm yum -y install ipvsadm echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf sysctl -p touch /etc/sysconfig/ipvsadm systemctl start ipvsadm systemctl enable ipvsadm # add vip ifconfig em1:0 192.