Zookeeper vs Load Balancer

Zookeeper is registry for large distributed systems. It is beneficial for tasks like master election, crash detection and managing meta data related to distributed systems.

In simple terms, load balancer helps in distribution of workload across multiple servers.

Can Load Balancer act as Zookeeper?

NO!

Zookeeper is cheaper relative to load balancer. It is absurd to invest in load balancer to do task of zookeeper. Having a program to update zookeeper is easier than writing a reliable program to update load balancer.