Previously known as the Netflix discovery service, the company’s tech blog explains in detail exactly why this service was needed, boiling down to the fact that AWS doesn’t offer a middle tier load balancer.
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Diving deeper, Netflix explains that the Eureka Server, which also comes with a java-based client component (the Eureka Client), will be primarily used in the AWS cloud “for locating services for the purpose of load balancing and failover of middle-tier servers.” Beyond that, it will be used in the following ways:
- For aiding Netflix Asgard – an open source tool for managing cloud deployments.
- Fast rollback of versions in case of problems avoiding the re-launch of 100’s of instances.
- In rolling pushes, for avoiding propagation of a new version to all instances.
- For our Cassandra deployments to take instances out of traffic for maintenance.
- For our Memcached based Evcache services to identify the list of nodes in the ring.
- For carrying other additional application specific metadata about services.
For consumers, the bottom line is that Netflix is attempting to make itself a more reliable streaming service that is flexible enough to handle any problem AWS can throw at it.
Featured image: Ross Catrow