Please provide feedback and reopen.I am trying to get this worked with client able to discover them within the same zone and hop over in case they are not available in thier current zone. For this, we will use the package Any microservice should be able to locate the different instances of another service without having their addresses defined in the code.To do this in Spring, we will use the Eureka Server from the In this article, I will explain how to create a service that will call to request the capital of a country. Before talking about self-preservation, let's understand how the Eureka server maintains the client instance registry. microservice, Then it creates an object, But, using this method has one problem: we have written the URL where the different instances of microservice are located in our program. Join the DZone community and get the full member experience.In this article, we will talk about how to create distributed microservices using Spring Boot. Two instances of this service will be executed so that we can see how the Project Capitals-service program makes a call to an instance and the other of the two instances performs load balancing.The first thing we need is to have a place where all the microservices can register when they are initialized. The name used for register is the name of the application as declared in the variable Thus, we see that the application countries-service has two instances, both raised in the host port-chuchi — one on port 8000 and one on port 8001.This simple application will use an H2 database for data persistence, and I only have a simple table called Receive : Country code.
This service, in turn, calls another service to locate the requested data, since the first is only be an entry point.The Project: countries-service instance will have a database with the different countries. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.By clicking “Sign up for GitHub”, you agree to our i google and read the doc and can't find some detailed description or example for config eureka server & client in multiple zones.in cloud env, there are 2 zones in 1 region. ( 'it is', 'eu', 'in' ....) Sets the time that the input / {country} pause before returning the result.This service calls the above service to request all the data on one country. In this tutorial we will run multiple instances of a service and access them via @RestTemplate load balancer.. Thanks.Having the services register with the correct Eureka Server for their zone is just a matter of setting the URL to the Eureka server in To enable the case where a request to route to a service in another zone when the service in its zone is unavailable you need to make sure the Eureka servers in all zones are set up as peers of each other. To see your status we can use our favorite browser and navigate to On the same screen, the server's status is displayed.Now that we have our server, let's create our first customer. {{ parent.articleDate | date:'MMM. In this example, we will use a Eureka server which is very easy to create.To do this, we will create a new Spring Boot project with the In this project, we will change the file application.properties to include the following:Now, in our class, where it enters Spring Boot we put the annotation And it's ready! I have set up all the properties as mentioened and its going to below place for resolution of the eureka service name and zone is not getting used. i want to deploy eureka server1 in zone1, eureka server2 in zone2.Service deployed in zone1, registered in eureka server1.for request route to zone1, prefer to route to service in zone1; and route to service in zone2 in case of service in zone1 is downhow to config the eureka server and client? You can access the Eureka Monitor by the URL below, More information on that can be found in how to config eureka server1 to zone1 and eureka server 2 to zone2?at zuul, i config 2 URLs in serviceUrl.defaultZone, the 1st one is zone1 eureka server, the 2nd one is zone2 eureka server. eureka: instance: hostname: server1 [Eureka Dashboard] Eureka Dashboard. So it is recommended that it should not be a single point of failure.To overcome it we need multiple Eureka server instance runs behind a load balancer. Our Eureka server is created. In our example, we've just run one, though this will not be normal in a real-life use-case. Eureka Monitor allows you to see the list of active and registered services (applications) with this Eureka Server, and see the replicas of this application running on the distributed system. In this case, countries-service is as recorded in the Eureka application server.Thus, our application will use all service instances automatically.If you wish to use any of the other three available rules, or even define a new rule, then we have to create a class of configuration for Ribbon, as follows:Now, to specify that we want to use this class to configure Ribbon, add the label:To check how this is performing, we establish a pause of 10 milliseconds to the server listening on port 8001, and 300 milliseconds to the server listening on port 8000 using the call /time/{time} of service countries-serviceAssuming that we are working on Linux, we can use the following Bash code to generate 100 requests.After a while, we see the requests that have been made to each port by calling To end this article, I'll say that Ribbon can be used without Feign by directly using In addition, for testing and balancing, I've used Docker; the source code for which can be found on my This is also used to dynamically define when the container is released to Docker, with the environment variable Opinions expressed by DZone contributors are their own.
Document working with multiple zones in eureka Every Micro service will register into the Eureka server and Eureka server knows all the client applications running on each port and IP address.
if this config is enough when zone1 service is unavailable, the request is routed to zone2 service?at zuul / service, how to config to route the request to service the same zone?btw, how to config region info for eureka and config 2 zones under this region?Since the two Eureka servers are set to be peers of each other they will replicate service information with each other.On the clients when a request is made to a service we will use the zone information obtained from Eureka about the various services to determine which service to try first.eureka server config is just as above and the eureka client config in service is below:then zuul1 will route request to services in zone1 first and if services in zone1 is down, will route request to services in zone2.Closing due to lack of activity. If you have deployed Eureka clients to multiple zones than you may prefer that those clients leverage services within the same zone before trying services in another zone. Eureka Server is also known as Discovery Server.