keepalived is a framework for both load balancing and high availability that implements VRRP. This is a protocol that you see on some routers and has been implemented in keepalived. It creates a Virtual IP (or VIP, or floating IP) that acts as a gateway to route traffic to all participating hosts. This VIP that can provide a high availability setup and fail over to another host in the event that one is down.
references:
https://docs.technotim.live/posts/keepalived-ha-loadbalancer/#:~:text=keepalived%20is%20a%20framework%20for,traffic%20to%20all%20participating%20hosts.
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