microservices-demo | Demo application to go with Blog on spring.io | Learning library

 by   paulc4 Java Version: v1.0.0 License: No License

kandi X-RAY | microservices-demo Summary

kandi X-RAY | microservices-demo Summary

microservices-demo is a Java library typically used in Tutorial, Learning applications. microservices-demo has no bugs, it has no vulnerabilities, it has build file available and it has medium support. You can download it from GitHub.

Demo application to go with Blog on spring.io

            kandi-support Support

              microservices-demo has a medium active ecosystem.
              It has 862 star(s) with 822 fork(s). There are 94 watchers for this library.
              It had no major release in the last 12 months.
              There are 4 open issues and 14 have been closed. On average issues are closed in 248 days. There are 16 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of microservices-demo is v1.0.0

            kandi-Quality Quality

              microservices-demo has no bugs reported.

            kandi-Security Security

              microservices-demo has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              microservices-demo does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              microservices-demo releases are available to install and integrate.
              Build file is available. You can build the component from source.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed microservices-demo and discovered the below as its top functions. This is intended to give you an instant insight into microservices-demo implemented functionality, and help decide if they suit your requirements.
            • Runs the Eureka server
            • Prints application usage information to console
            • Runs the Spring Boot application
            • The main application
            • Search for an account
            • Displays a user account
            • Validates the email
            • Search for users
            • Create a web account controller
            • The account service
            • Starts the downloader
            • Downloads a file from an URL
            • Fetch an account by number
            • Returns all accounts with the given name
            • Gets account by number
            • Display a search form
            • Checks if the account number is valid
            • Set the balance
            • Updates the given amount
            • Get the balance balance
            • Called to withdraw the amount
            • Returns a string representation of the account number
            • Inits the web data binder
            • Start the demo
            • Create an in - memory database
            Get all kandi verified functions for this library.

            microservices-demo Key Features

            No Key Features are available at this moment for microservices-demo.

            microservices-demo Examples and Code Snippets

            No Code Snippets are available at this moment for microservices-demo.

            Community Discussions


            Can't use a method from another file in same package
            Asked 2021-May-16 at 19:22

            That is my server.go file where I define my server struct and its methods.



            Answered 2021-May-16 at 18:51


            How to resolve DNS lookup error when trying to run example microservice application using minikube
            Asked 2021-May-14 at 11:16

            Dear StackOverflow community!

            I am trying to run the https://github.com/GoogleCloudPlatform/microservices-demo locally on minikube, so I am following their development guide: https://github.com/GoogleCloudPlatform/microservices-demo/blob/master/docs/development-guide.md

            After I successfully set up minikube (using virtualbox driver, but I tried also hyperkit, however the results were the same) and execute skaffold run, after some time it will end up with following error:



            Answered 2021-May-14 at 11:16

            Tried it with docker driver, i.e. minikube start --driver=docker, and it works. Thanks Brian!

            Source https://stackoverflow.com/questions/67488003


            Atleast one invalid signature was encountered
            Asked 2020-Dec-19 at 15:20

            I am trying to build and deploy microservices images to a single-node Kubernetes cluster running on my development machine using minikube. I am using the cloud-native microservices demo application Online Boutique by Google to understand the use of technologies like Kubernetes, Istio etc.

            Link to github repo: microservices-demo

            While following the installation process, and on running command skaffold run to build and deploy my application, I get some errors:



            Answered 2020-Jun-22 at 09:07

            There are a few reasons why you encounter these errors:

            1. There might be an issue with the existing cache and/or disc space. In order to fix it you need to clear the APT cache by executing: sudo apt-get clean and sudo apt-get update.

            2. The same goes with existing docker images. Execute: docker image prune -f and docker container prune -f in order to remove unused data and free disc space.

            3. If you don't care about the security risks, you can try to run the apt-get command with the --allow-unauthenticated or --allow-insecure-repositories flag. According to the docs:

            Ignore if packages can't be authenticated and don't prompt about it. This can be useful while working with local repositories, but is a huge security risk if data authenticity isn't ensured in another way by the user itself.

            Please let me know if that helped.

            Source https://stackoverflow.com/questions/62473932


            Online Boutique Extensions
            Asked 2020-Aug-01 at 15:14

            I have been working on extending the GCP Online Boutique microservices example, and I would like to add Istio AuthorizationPolicy resources to the system.

            Concretely, I want an AuthorizationPolicy to block all not-whitelisted traffic to cartservice, and I want to whitelist traffic from frontend to cartservice.

            Currently, I am able to block traffic with an AuthorizationPolicy, but I cannot whitelist traffic by principal or namespace.

            For context, here is my system setup. (Anything not explicitly stated here is the default from the demo linked above)

            Istio Version:



            Answered 2020-Aug-01 at 15:14

            For reference, after debugging in person with OP, we discovered that the cluster was underspecified in terms of CPU usage. On resizing the cluster to have additional CPU (1 vCPU -> 4 vCPUs), we were able to get authz policies working and respected.

            Our hypothesis is that istiod was failing to respond to requests because of this issue. We do not know why.

            Source https://stackoverflow.com/questions/63161116


            Readiness probe failed: timeout: failed to connect service ":8080" within 1s
            Asked 2020-Jul-25 at 20:26

            I am trying to build and deploy microservices images to a single-node Kubernetes cluster running on my development machine using minikube. I am using the cloud-native microservices demo application Online Boutique by Google to understand the use of technologies like Kubernetes, Istio etc.

            Link to github repo: microservices-demo

            I have followed all the installation process to locally build and deploy the microservices, and am able to access the web frontend through my browser. However, when I click on any of the product images say, I see this error page.

            HTTP Status: 500 Internal Server Error

            On doing a check using kubectl get pods I realize that one of my pods( Recommendation service) has status CrashLoopBackOff. Running kubectl describe pods recommendationservice-55b4d6c477-kxv8r:



            Answered 2020-Jul-25 at 20:26

            The timeout of the Readiness Probe (1 second) was too short.

            More Info

            The relevant Readiness Probe is defined such that /bin/grpc_health_probe -addr=:8080 is run inside the server container.

            You would expect a 1 second timeout to be sufficient for such a probe but this is running on Minikube so that could be impacting the timeout of the probe.

            Source https://stackoverflow.com/questions/63060336


            How I use one YAML to deploy two servers where one depends on the other one in Kubernetes
            Asked 2020-Jul-09 at 11:27

            I have two applications, nginx and redis, where nginx uses redis to cache some data so the redis address must be configured in nginx.

            On the one hand, I could first apply the redis deployment and get its IP and then apply the nginx deployment to set up the two application in my minikube.

            But on the other, to simplify installation in the Kubernetes Dashboard for QA, I want to create a single Kubernetes YAML file (like GoogleCloudPlatform/microservices-demo/kubernetes-manifests.yaml) to deploy these two applications on two diverse Pods. However, if I do it by means of Environment Variables, I cannot get the redis address.

            So how do I achieve it?



            Answered 2020-Jul-08 at 11:25

            Hardcoding IP-address is not a good practice. Instead you can create a service for redis as well and configure the service dns name in your nginx deployment using the kubernetes dns config like this my-svc.my-namespace.svc.cluster-domain.example. Your nginx will then communicate to the redis container through this service.

            Source https://stackoverflow.com/questions/62793578


            Applications not registering to eureka when using docker-compose
            Asked 2020-May-02 at 19:12

            I took this example https://github.com/paulc4/microservices-demo and I created 3 docker images from it, with the following Dockerfiles:




            Answered 2018-Jun-10 at 07:29

            Since its running in docker, don't use localhost. Docker compose lets you refer to container names.

            Source https://stackoverflow.com/questions/47266795


            How to edit this Deployment Yaml to have write permission in container
            Asked 2020-Apr-14 at 09:35

            When i deploy this Deployment for sock-shop Yaml for sock-shop

            but it does not give me write permission in the container so i cannot even write in it



            Answered 2020-Apr-14 at 09:20

            You need to run the pod as root to be able to get that permission.Edit the yaml and add below in the carts deployment

            Source https://stackoverflow.com/questions/61202596


            Terraform output from module source not found in main output
            Asked 2020-Apr-09 at 19:44

            this is the error i'm getting:

            Error: Reference to undeclared resource

            on outputs.tf line 2, in output "api-gateway-codedeploy-app-name":
            2: value = "${api-gateway-codedeploy.app-name}"

            A managed resource "api-gateway-codedeploy" "app-name" has not been declared in the root module.

            my terraform relevant folder structure is



            Answered 2020-Apr-09 at 19:44

            You are going to have more similar errors. But to fix the one you mentioned fix the following:

            Source https://stackoverflow.com/questions/61128548


            Should dependencies between Helm charts reflect dependencies between microservices?
            Asked 2019-Dec-20 at 11:59

            Given a following scheme of services and their dependencies I would like to engineer a set of Helm charts.

            • API Gateway calls Service A and Service C
            • Service A calls Service B
            • Service B calls Database
            • Service C calls Service B and Service D

            At the moment I see two alternatives:

            1. Each of the 6 components in a diagram below is a single chart and each arrow in a diagram is a single dependency.

            2. There's an Umbrella chart that has a dependency on all other charts. The Database chart is a dependency of Service B chart.

            Helm documentation suggest going with option 2. I am however more keen towards option 1 due to an ease of local development and CI/CD pipeline.

            Example scenario: developer is refactoring Service C and he wants to run the code he changed and test it.

            • Option 1. Developer installs a Service C chart only.
            • Option 2: Developer would have to either:
              • install an Umbrella chart which leads to waste of a CPU and memory resources because of running unneeded services like Service A or API Gateway, which doesn't scale well with the complexity of the system;
              • install Service C, then Service B and then Service D, which also doesn't scale well with the complexity of the system because it requires to perform many manual actions and also require from developer to be faimiliar with the architecture of the system in order to know what charts needs to be installed.

            I would like to make an educated decision on which alternative to take. I am more keen towards option 1, but Helm docs and also few examples I was able to find on the Internet (link) are also going with option 2, so I think I might be missing something.



            Answered 2019-Mar-10 at 20:08

            I would recommend one chart per service, with the additional simplification of making the "service B" chart depend on its database. I would make these charts independent: none of the services depend on any other.

            The place where Helm dependencies work well is where you have a service that embeds/hides specific single other parts. The database behind B is an implementation detail, for example, and nothing outside B needs to know about it. So B can depend on stable/postgres or some such, and this works well in Helm.

            There's one specific mechanical problem that causes problems for the umbrella-chart approach. Say service D also depended on a database, and it was the same "kind" of database (both use PostgreSQL, say). Operationally you want these two databases to be separate. Helm will see the two paths umbrella > B > database and umbrella > D > database, and only install one copy of the database chart, so you'll wind up with the two services sharing a database. You probably don't want that.

            The other mechanical issue you'll encounter using Helm dependencies here is that most resources are named some variant of {{ .Release.Name }}-{{ .Chart.Name }}. In your option 1, say you do just install service C; you'd wind up with Deployments like service-C-C, service-C-B, service-C-database. If you then wanted to deploy service A alongside it, that would introduce its own service-A-B and service-A-database, which again isn't what you want.

            I'm not aware of a great high-level open-source solution to this problem. A Make-based solution is hacky, but can work:

            Source https://stackoverflow.com/questions/55078150

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


            No vulnerabilities reported

            Install microservices-demo

            You can download it from GitHub.
            You can use microservices-demo 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 microservices-demo 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 maven.apache.org. For Gradle installation, please refer gradle.org .


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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