eureka | AWS Service registry for resilient mid-tier load balancing and failover | Configuration Management library

 by   Netflix Java Version: v2.0.0 License: Apache-2.0

kandi X-RAY | eureka Summary

kandi X-RAY | eureka Summary

eureka is a Java library typically used in Telecommunications, Media, Media, Entertainment, Devops, Configuration Management, Docker applications. eureka has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has medium support. You can download it from GitHub, Maven.

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. At Netflix, Eureka is used for the following purposes apart from playing a critical part in mid-tier load balancing.

            kandi-support Support

              eureka has a medium active ecosystem.
              It has 11860 star(s) with 3702 fork(s). There are 983 watchers for this library.
              It had no major release in the last 12 months.
              There are 58 open issues and 560 have been closed. On average issues are closed in 84 days. There are 17 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of eureka is v2.0.0

            kandi-Quality Quality

              eureka has 0 bugs and 0 code smells.

            kandi-Security Security

              eureka has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              eureka code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              eureka is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              eureka releases are available to install and integrate.
              Deployable package is available in Maven.
              Build file is available. You can build the component from source.
              Installation instructions are not available. Examples and code snippets are available.
              eureka saves you 18519 person hours of effort in developing the same functionality from scratch.
              It has 36652 lines of code, 3307 functions and 419 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed eureka and discovered the below as its top functions. This is intended to give you an instant insight into eureka implemented functionality, and help decide if they suit your requirements.
            • Generates a list of service urls from a DNS client configuration .
            • Checks if two instances are equal .
            • Initialize the eureka client context .
            • Binds the EIP to the EIP .
            • Get application durations from multiple regions .
            • Creates a composite resolver that can be used to resolver on the same instance .
            • Creates or returns the jersey client .
            • Generate Payload .
            • Gets all the Eureka containers .
            • Sends a request to the eureka client using the eureka client .
            Get all kandi verified functions for this library.

            eureka Key Features

            No Key Features are available at this moment for eureka.

            eureka Examples and Code Snippets

            Entry point for the Eureka client application .
            javadot img1Lines of Code : 3dot img1License : Permissive (MIT License)
            copy iconCopy
            public static void main(String[] args) {
          , args);

            Community Discussions


            Building Docker image from spring maven project for arm64 platform
            Asked 2022-Mar-24 at 00:10

            I'm in a Spring course, and I have a maven application (downloaded from the course resources) built from spring initializr. I can build a local Docker image with mvn spring-boot:build-image (no Dockerfile in the project). By default a Docker image is built as linux/amd64, but I am working with a M1 Apple Silicon chip (arm64). I've been looking many workarounds but with no success. Lastly, I found that maybe adding a Dockerfile and specifying the platform it would build the image accordingly.

            My goal is to build a docker image for arm64 architecture.

            So, I created a Dockerfile:



            Answered 2022-Mar-24 at 00:10

            Building an ARM-based image is not currently possible with mvn spring-boot:build-image, because the Cloud Native Buildpacks builders that Spring Boot integrates with do not support this. This is one of the possible items of focus on the Paketo buildpacks 2022 roadmap, which you can cast votes for.

            CNB documents a work-around for this, but it's not simple to set up and run.

            RUN mvn -f /home/path_to_app/pom.xml spring-boot:build-image -DskipTests

            You would need Docker-in-Docker to make something like this work, since the CNB builder processes that would run inside the Docker container need to talk to the Docker daemon. Regardless, this would not allow you to build an ARM image for the reasons stated above.



            Spring Cloud Gateway; Spring MVC found on classpath, which is incompatible with Spring Cloud Gateway Issue
            Asked 2022-Mar-16 at 07:16

            I got this below error when run the API-GATEWAY, I tried so many ways but I couldn't solve this issue.


            Spring MVC found on classpath, which is incompatible with Spring Cloud Gateway.


            Please set spring.main.web-application-type=reactive or remove spring-boot-starter-web dependency.

            Main Class



            Answered 2021-Aug-01 at 06:17

            Please note that Spring Cloud Gateway is not compatible with Spring MVC (spring-boot-starter-web). This is outlined in section "How to include Spring Cloud Gateway in the official reference documentation":

            Spring Cloud Gateway is built on Spring Boot 2.x, Spring WebFlux, and Project Reactor. As a consequence, many of the familiar synchronous libraries (Spring Data and Spring Security, for example) and patterns you know may not apply when you use Spring Cloud Gateway.

            Additionally, it is stated that:

            Spring Cloud Gateway requires the Netty runtime provided by Spring Boot and Spring Webflux. It does not work in a traditional Servlet Container or when built as a WAR.

            As already suggested by the error message, you would need to remove the dependency on spring-boot-starter-web. You can list all your direct and transitive dependencies with the following command:



            Use main Gradle project to define all dependencies versions
            Asked 2022-Mar-06 at 15:38

            I want to create one main Gradle project which hosts all project dependencies:

            Main Gradle project:



            Answered 2022-Mar-06 at 15:36

            There’s a relatively new Gradle feature called “version catalogs”. With those you can centrally declare dependencies that you’d like to share between multiple projects of your build (or even between different builds).

            In your concrete example, you’d add something like the following to your settings.gradle file:



            parsing error in yml file for microservices
            Asked 2022-Feb-22 at 06:13

            18:01:39.008 [main] ERROR org.springframework.boot.SpringApplication - Application run failed org.yaml.snakeyaml.scanner.ScannerException: mapping values are not allowed here in 'reader', line 16, column 16: uri: lb://USER-SERVICE




            Answered 2021-Jul-25 at 12:15

            Your yaml is not valid. Check this validator as example.

            Note how on line 16 and next, uri, predicates and path are not on the same column as just before.

            Valid yaml is:



            Configure Spring Gateway with Spring Authorization Server
            Asked 2022-Jan-20 at 11:40

            I have Spring Gateway application with the following Gradle dependencies:



            Answered 2022-Jan-20 at 11:40

            Is it possible to use Spring Authorization server without exposing it to outside?

            The Spring Authorization Server is implementing the OAuth2 protocol. If we look at the specs, we can see that it's naturally a client, which wants to authenticate itself: In your setup, it seems like that client is not the gateway itself, but lets say an app. So if that app should use the Spring Authorization Server, it would authenticate with it (most of the time, that means acquiring a token), before the first interaction with the gateway happens. So to answer that question, if you want to use OAuth2 as it was meant to be used, you would need a direct connection between the app and the Spring Authorization Server, which means, it needs to be exposed to the outside. This makes perfect sense, since OAuth2 is meant to be used not with a single service, but with lots of different services, e.g. to allow single-sign-on.

            What is the proper way to implement this?

            You could setup your own Spring Authorization Server, implement your custom Authorization Code Grant logic, so that a client can authenticate itself and acquire a token. This could for example be a JSON Web Token (JWT). This can (should) be independent from your gateway and other services.

            To authorize requests at the gateway, there are different ways. You could implement a logic yourself, which reads a JWT from the request and authorize it with the Spring Authorization Server or another identity provider, which you might have. You can also use Spring Cloud Security with the Spring Authorization Server, which is described here: This is definitely a proper way to implement it.

            One more thing: as you can see, OAuth2 comes with a price, being that it is not trivial to understand and configure. You must understand it in detail, before you deploy such a setup. On the other hand, its a solid standard and you can have feature like single-sign-on out of the box. So if you only need authorization for single or multiple apps to a single service, there are probably easier ways to gain a token and secure an app and OAuth2 is maybe overkill. But OAuth2 really pays off, if you have lots of services and lots of apps which should be authenticated with a central (sometimes company-wide) solution.



            AWS API Gateway and Spring boot custom authorization
            Asked 2022-Jan-11 at 11:27

            I am currently working on one project where it requires the custom authentication process. This application will be deployed on AWS platform, in which I am considering to use below AWS services like

            1. API Gateway
            2. Custom Authorization
            3. EKS

            The plan is to deploy all backend services in the docker containers and use EKS service for container orchestration process. All input request will be validated through API gateway and routed to the respective backend services.
            We are going to use custom authorization process with below possible steps:

            1. Our application (say CHILD-APP) will be integrated with an existing application (say PARENT-APP), where the PARENT-APP will take care of the user authentication.
            2. On successful user authentication, the PARENT-APP will request the access token (JWT Token) to CHILD-APP.
            3. This access token will be used by CHILD-APP User Interface to make the backend request calls.
            4. We are using custom access token validation process to check the token integrity, the username validation and other additional validations (cannot be exposed due to compliances).
            5. Currently I am using the Spring Boot API Gateway for URL routings, and for access token validations.
            6. Also using custom Spring Cloud Eureka server to register the services.


            1. How to use the AWS API Gateway for such custom authentication and authorization process?
            2. Can I use the Spring Cloud Eureka server and custom authorization along with the AWS API Gateway?

            Any help related to this is appreciated.





            Answered 2022-Jan-11 at 11:27

            It seems like AWS Lambda Authorizers is something you're looking for: These are lambda functions which can be used to authorize access to your APIs at the gateway level.

            At Curity we have recently created such an authorizer which performs an introspection request to the Authorization Server to exchange an opaque token for a JWT: It looks like you need something similar. Your authorizer could call the parent app, which will perform all the custom validations on the token and return a proper result, which then the AWS Lambda authorizer will use to make authorization decision.



            Spring RestTemplate and getForObject for Microservices issues
            Asked 2021-Dec-21 at 20:45

            I am working on exercises from a training program regarding Microservices and Spring Boot.

            I successfully configured: (1) a Eureka server, and (2) a toll rate service which is a client of the Eureka server. This toll rate service has port number 8085

            Now I am trying to configure:
            (3) a third service, which will be a dashboard that consume the API data from the toll rate service (and this dashboard also registers with Eureka server). This has port number 8087

            The issue is that, I am not able to display the dashboard using below code for the in (3):



            Answered 2021-Dec-21 at 20:45

            According to the described setup, particularly:



            How to install nc in mysql container
            Asked 2021-Dec-18 at 18:01

            I am getting this message nc command is missing and by doing some R&D, I got to know that in order to resolve this, (I think) I need to run below command in MySQL container in docker-compose



            Answered 2021-Dec-17 at 06:33

            You could build and publish your own container image if you wanted with a dockerfile like this



            How to make a proper reactive extension on Eureka SelectableSection
            Asked 2021-Dec-01 at 03:28

            This is my first question to the StackOverflow community so excuse me if I'm doing something wrong.

            1. What I'm trying to achieve
            Basically, I want to make a custom reactive wrapper around Eureka's SelectableSection class in order to observe the value of the selected row when it is changed. I'm thinking to get this data from the onSelectSelectableRow closure which is called every time a row is selected.

            2. What I've tried to do for that
            Actually, I've got this working but it's not a generic use of the custom wrapper, here is the example that works but only when I specify the row and its value type, for example ListCheckRow.



            Answered 2021-Dec-01 at 03:28

            The fundamental problem here is that SelectableSectionType is a protocol that isn't restricted to class types and Reactive assumes that Base is a class (or otherwise is not going to be modified by the observable creation.)

            I think the most generic you can make this is something like:



            Issue selecting multiple inputs using selectInput
            Asked 2021-Nov-19 at 22:14

            So I put together the foundation of this scrip thanks to the help of an older question I posted on here.

            But when I try to add multiple inputs by specifying selectInput(multiple = TRUE...) and then changing all the = on the server side to %in% to account for the multiple choices, I am met with the following error:

            Warning: Error in if: argument is of length zero [No stack trace available]



            Answered 2021-Nov-19 at 22:14

            You just need req(), in a couple of places. Try this


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install eureka

            You can download it from GitHub, Maven.
            You can use eureka like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the eureka component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer For Gradle installation, please refer .


            Please see [wiki]( for detailed documentation.
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