Spring Cloud Eureka 4 (Highly available service registry)

In a distributed environment such as microservices, we need to take full account of the failure situation, so a high-availability deployment of individual components must be considered in a production environment, as is the case with service registries.

The high availability of the Eureka Server is actually about registering itself as a service to other registries, so that a set of registered registries can be implemented to achieve a high-availability effect by synchronizing the list of services with each other.

Create a new project Eureka-cluster and Eureka-cluster2

Project creation refer to the building of the Service registration center above

Http://www.cnblogs.com/HanShisi/p/8319856.html

Not here to repeat.

The difference lies in the configuration of the Application.properties file.

The configuration of the Eureka-cluster is as follows:

Spring.application.name=eureka-server
server.port=1111
Eureka.instance.hostname=peer1
Eureka.client.serviceurl.defaultzone=http://peer2:1112/eureka

The configuration of the Eureka-cluster2 is as follows:

Spring.application.name=eureka-server
server.port=1112
Eureka.instance.hostname=peer2
Eureka.client.serviceurl.defaultzone=http://peer1:1111/eureka

Note:

Add the following configuration to the C:\Windows\System32\drivers\etc\hosts file

127.0.0.1 Peer1
127.0.0.1 Peer2

At the same time, we will modify the service provider that is in the above http://www.cnblogs.com/HanShisi/p/8320022.html hello-service configuration slightly

# Service Name, registration center to mark the service
Spring.application.name=hello-service
# Specify the registration center
Eureka.client.serviceurl.defaultzone=http://peer1:1111/eureka/,http://peer2:1112/eureka

The above-mentioned main eureka.client.serviceUrl.defaultZone values have been modified to register this service in Peer1 and Peer2 respectively

Start Eureka-cluster, Eureka-cluster2, and Hello-service separately

respectively through

http://peer1:1111/

http://peer2:1112/

Visit the Registration center

This is where a simple service registry cluster is built.

Spring Cloud Eureka 4 (Highly available service registry)