ha-proxy

yum install haproxy -y or keepalived
sudo systemctl status haproxy
systemctl status friewalld





#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
    balance     roundrobin
    server  app1 127.0.0.1:5001 check
    server  app2 127.0.0.1:5002 check
    server  app3 127.0.0.1:5003 check
    server  app4 127.0.0.1:5004 check


frontend kubernetes-frontend
    bind 10.46.176.149:6443
    mode tcp
    option tcplog
    default_backend kubernetes-backend

backend kubernetes-backend
    mode tcp
    option tcp-check
    balance roundrobin
    server k8ha-master1-146 10.46.176.146:6443 check fall 3 rise 2
    server k8ha-master2-160 10.46.176.160:6443 check fall 3 rise 2