Even during a network partition between the clients and servers, the servers have built-in resiliency to prevent a large scale outage.Deploying Eureka in multiple AWS regions is a fairly straightforward task. REST based endpoints are also exposed for all operations that are supported by the Eureka client. 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. It also comes with the drawback of the traditional DNS based load balancing solutions where the traffic can still be routed to servers which may not be healthy or may not even exist (in the case of AWS cloud where servers can disappear anytime).At Netflix, Eureka is used for the following purposes apart from playing a critical part in mid-tier load balancing.For our memcached caching services to identify the list of nodes in the ring.Used for carrying other additional application specific metadata about services for various other reasons.You typically run in the AWS cloud and you have a host of middle tier services which you do not want to register with AWS ELB or expose traffic from outside world. AWS Service registry for resilient mid-tier load balancing and failover. 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. Since AWS does not yet provide a middle tier load balancer, Eureka fills a big gap in the area of mid-tier load balancing.AWS Elastic Load Balancer is a load balancing solution for edge services exposed to end-user web traffic. There is For services that are non-Java based, you have a choice of implementing the client part of eureka in the language of the service or you can run a "side car" which is essentially a Java application with an embedded eureka client that handles the registrations and heartbeats. Eureka is analogous to internal DNS and has nothing to do with the DNS servers across the world. This does require a small amount of memory, but buys better resiliency.Route 53 is a naming service, like which Eureka can provide the same for the mid-tier servers, but the similarity stops there. Eureka is analogous to internal DNS and has nothing to do with the DNS servers across the world. Eureka helps you find the information about the services you would want to communicate with but does not impose any restrictions on the protocol or method of communication. Eureka fills the need for mid-tier load balancing. Eureka is also region-isolated in the sense that it does not know about servers in other AWS regions. We call this service, the Eureka Server. Route 53 can also do latency based routing across AWS regions. Since, AWS does not yet provide a middle tier load balancer, Eureka fills a big gap in the area of mid-tier load balancing.AWS Elastic Load Balancer is a load balancing solution for edge services exposed to end-user web traffic. It also comes with the drawback of the traditional DNS based load balancing solutions where the traffic can still be routed to servers which may not be healthy or may not even exist (in the case of AWS cloud where servers can disappear anytime).At Netflix, Eureka is used for the following purposes apart from playing a critical part in mid-tier load balancing.For our memcached caching services to identify the list of nodes in the ring.Used for carrying other additional application specific metadata about services for various other reasons.You typically run in the AWS cloud and you have a host of middle tier services which you do not want to register with AWS ELB or expose traffic from outside world. You are either looking for a simple round-robin load balancing solution or are willing to write your own wrapper around Eureka based on your load balancing need. Since Eureka clients have the registry cache information in them, they can operate reasonably well, even when all of the eureka servers go down.Eureka Servers are resilient to other eureka peers going down.
If you are looking for a sticky user session based load balancing which AWS now offers, Eureka does not offer a solution out of the box.
Unlike the traditional load balancers which work with servers with well known IP addresses and host names, in AWS, load balancing requires much more sophistication in registering and de-registering servers with load balancer on the fly. Route 53 is a DNS service which can host your DNS records even for non-AWS data centers. Eureka clusters between regions do not communicate with one another. This facilitates a much better scalability model and Eureka is well suited to address this.Another important aspect that differentiates proxy-based load balancing from load balancing using Eureka is that your application can be resilient to the outages of the load balancers, since the information regarding the available servers is cached on the client. Non-java clients can use the REST end points to query for information about other services.With Eureka you can add or remove cluster nodes on the fly. Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. Even during a network partition between the clients and servers, the servers have built-in resiliency to prevent a large scale outage.Deploying Eureka in multiple AWS regions is a fairly straightforward task.
