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This article introduces you how to build a Spring cloud eureka cluster, the content is very detailed, interested friends can refer to, I hope it can be helpful to you.

I believe that the construction of Spring cloud eureka clusters is not unfamiliar to every Java learner. Learners who want to advanced learning Java can not avoid the important link of building Spring cloud eureka cluster, which is also a headache for many people.

Here's a brief introduction to Netflix Eureka. Spirng Cloud Eureka uses Netflix Eureka for service registration and discovery. It contains both server-side components and client-side components, and both server and client are written in java, so Eureka is mainly suitable for distributed systems implemented through java or systems built by JVM compatible language. The server of Eureka provides a relatively perfect REST API, so Eureka also supports the integration of services that are not implemented in Eureka language into the Java service governance system, and only needs other language platforms to implement the client program of Eureka. At present, the Steeltoe of .net platform and the eureka-js-client of Node.js have implemented the Ereka client components of their respective platforms.

In the service governance framework, a registry is usually built, and each service unit registers its own services with the registry, including the host and port number of the service, the service version number, communication protocol and other additional information. The registry organizes the service list according to the service name, and also needs to monitor the availability of the services in the list by heartbeat detection, and if not, it needs to be removed from the service list to achieve the effect of troubleshooting services.

Eureka server, that is, the service registry. Like other service registries, it supports highly available configurations. Relying on strong consistency to provide good service instance availability, it can deal with a variety of different failure scenarios. The Eureka server supports cluster mode deployment. When a shard in the cluster fails, Eureka will automatically switch to self-protection mode. It allows to continue to provide service discovery and registration in the event of a shard failure, and when the fault allocation is restored, other shards in the cluster will synchronize their status back. Different service registries in the cluster replicate their states to each other through asynchronous mode, which also means that there may be inconsistencies in the state of each instance with respect to all services at a given point in time.

Eureka client, which mainly deals with the registration and discovery of services. The client service is embedded in the code of the client application through registration and parameter configuration. When the application starts, the Eureka client registers its own services with the service registry and periodically sends a heartbeat to update its service lease. At the same time, he can also query the currently registered service information from the server and cache them locally and refresh the service status of periodic lines.

On how to build a Spring cloud eureka cluster to share here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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