Consul is a tool for service discovery and configuration. Consul is distributed, highly available, and extremely scalable.
ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization,
and providing group services. All of these kinds of services are used in some form or another by distributed applications.
Eureka is a REST (Representational State Transfer) based service that is primarily used in the AWS cloud for
locating services for the purpose of load balancing and failover of middle-tier servers.
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