Microservices are quickly becoming the go-to architectural and organizational strategy for application development. The days of monolithic approaches are behind us as software becomes more complex. Microservices provide greater flexibility and software resilience while creating a push for innovation.
At its core, microservices are about having smaller, independent processes that communicate with one another through a well-designed interface and lightweight API. In this guide, we'll provide a quick breakdown of how to build easy microservices.
Create Your Services
To perform Kubernetes microservices testing, you need to create services. The goal is to have independent containerized services and establish a connection that allows them to communicate.
Keep things simple by developing two web applications. Many developers experimenting with microservices use the iconic "Hello World" test to understand how this architecture works.
Start by building your file structure. You'll need a directory, subdirectories and files to set up the blueprint for your microservices application. The amount of code you'll write for a true microservices application is great. But to keep things simple for experimentation, you can use prewritten codes and directory structures.
The first service you should create is your "hello-world-service." This flask-based application has two endpoints. The first is the welcome page. It includes a button to test the connection to your second service. The second endpoint communicates with your second service.
The second service is the REST-based "welcome service." It delivers a message, allowing you to test that your two services communicate effectively.
The concept is simple: You have one service that you can interact with directly and a second service with the sole function of delivering a message. Using Kubernetes microservices testing, you can force the first service to send a GET request to your REST-based second service.
Containerizing
Before testing, you must make your microservices independent from the hosting environment. To do that, you encapsulate them in Docker containers. You can then set the build path for each service, put them in a running state and start testing.
The result should be a simple web-based application. When you click the "test connection" button, your first service will connect to the second, delivering your "Hello World" message.
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