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Microservices with Spring Boot 3 and Spring Cloud, Third Edition

Microservices with Spring Boot 3 and Spring Cloud, Third Edition

By : Magnus Larsson AB, Magnus Larsson
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Microservices with Spring Boot 3 and Spring Cloud, Third Edition

Microservices with Spring Boot 3 and Spring Cloud, Third Edition

4 (24)
By: Magnus Larsson AB, Magnus Larsson

Overview of this book

Looking to build and deploy microservices but not sure where to start? Check out Microservices with Spring Boot 3 and Spring Cloud, Third Edition. With a practical approach, you'll begin with simple microservices and progress to complex distributed applications. Learn essential functionality and deploy microservices using Kubernetes and Istio. This book covers Java 17, Spring Boot 3, and Spring Cloud 2022. Java EE packages are replaced with the latest Jakarta EE packages. Code examples are updated and deprecated APIs have been replaced, providing the most up to date information. Gain knowledge of Spring's AOT module, observability, distributed tracing, and Helm 3 for Kubernetes packaging. Start with Docker Compose to run microservices with databases and messaging services. Progress to deploying microservices on Kubernetes with Istio. Explore persistence, resilience, reactive microservices, and API documentation with OpenAPI. Learn service discovery with Netflix Eureka, edge servers with Spring Cloud Gateway, and monitoring with Prometheus, Grafana, and the EFK stack. By the end, you'll build scalable microservices using Spring Boot and Spring Cloud.
Table of Contents (26 chapters)
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24
Other Books You May Enjoy
25
Index

Trying out the discovery service

With all of the details in place, we are ready to try out Netflix Eureka:

  1. First, build the Docker images with the following commands:
cd $BOOK_HOME/Chapter09
./gradlew build && docker-compose build
  1. Next, start the system landscape and run the usual tests with the following command:
./test-em-all.bash start

Expect output similar to what we have seen in previous chapters:

Figure 9.5: Successful test output

With the system landscape up and running, we can start by testing how to scale up the number of instances for one of the microservices.

Scaling up

Run the following commands to try out scaling up a service:

  1. Launch two extra review microservice instances:
docker-compose up -d --scale review=3

With the preceding command, we ask Docker Compose to run three instances of the review service. Since one instance is already running, two new instances will be started up.

  1. Once the new instances are up and running, browse to http://localhost...

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