How to use Spring Cloud correctly? 【 the 】

5. How does Spring Cloud integrate DevOps?

Next, let’s take a look at what Spring Cloud can do to integrate with DevOps, and how it makes continuous application delivery faster. As we all know, DevOps creates a continuous delivery process that includes nodes: development, build, test, release, operation, etc. How do you make your application flow more smoothly through these nodes? Spring Cloud can do some coordination and optimization on each development node:

You can also use Maven Archetype to quickly create a Spring Boot project by using Spring Initializer. Archetype is a template toolkit for Maven projects, an Archetype that defines the basic skeleton of a certain type of project and uses it to provide sample projects to users as quickly as possible.
In the testing phase, microservices usually provide RESTful apis for various types of clients to call. In the past, we needed to record these API information with the help of documents for other personnel to check and test. If the API changes, we need to update the document synchronously, which reduces the efficiency of continuous delivery, and Swagger helps us automatically generate the API online document to keep up with the code implementation. From there, we can also automate testing of the API. Integrate Swagger with Spring Boot to automate interface testing.
In the release phase, projects developed by Spring Boot can be embedded into application servers such as Jetty and Tomcat, which are most suitable for releasing into Docker images. We can provide the Dockerfile template for making the image. Instead of using the Docker Maven plug-in, we can create a new Dockerfile file in the root directory of the current project. After the code is written, the user only needs to modify some parameters and directly manually execute commands to make the application into an image. This way, you don’t have to learn container techniques in depth.
In operation, we can access the unified configuration center, log cloud, full-link tracking and other platforms to facilitate problem locating and solving.

6. How does Spring Cloud fit into Cloud infrastructure?

Now that we’ve covered Spring Cloud’s development framework, service integration, and DevOps integration in detail, let’s look at what Spring Cloud can do to adapt to a Cloud platform. Generally, in order to make the various cloud computing stacks transparent to application developers and reduce the difficulty of cloud applications, we need to adapt different types of cloud infrastructure, such as virtual machines and containers.

A VM is an abstraction of a physical machine, including the operating system (OS), memory, and storage resources. During VM image creation, you can install software as required, such as WEB servers and databases. These software also appears on the VM that starts using the image. Containers need only as much space in the system as the code runtime environment, and containers on the same operating system share the host kernel. Running VMS and containers requires different resources due to different implementation principles. A virtual machine is essentially a full computer, requiring more resources than a container, which is just part of the operating system. Container clusters are generally less resource-intensive, so running multiple containers on a single server is better than running multiple VMS on a single server.

So what kind of infrastructure is suitable for our application? Common applications, such as message queues, registries, and databases, are suitable for vm deployment. These applications have high requirements on running resources and do not have many components. Container deployment is suitable for business applications. We can disassemble business applications into a large number of microservice components with a single responsibility. Each component has relatively certain resource requirements and needs to be flexible and scalable under different visits.

Therefore, our DevOps system needs to abstract out the management interfaces for operating different infrastructures, and implement application lifecycle management, service governance and other functions based on these management interfaces. This section can learn from foreign manufacturers to specify a Cloud Application Management standard CAMP (CAMP), which defines API for Application construction, operation, Management, monitoring and update, as well as resource model and interaction protocol. Decide to decide

7. Spring Cloud fill-in-the-blank application development mode

On a single microservice build, Spring has provided us with rich components from the presentation layer, domain layer, and data source layer, so we just need to focus on writing the business logic code; In terms of service integration, Spring Cloud has provided a whole family of microservices. We only need to reference these services and do not need to build these public services by ourselves. There are some optimizations and adaptations that can be made to connect DevOps to the cloud infrastructure. With its support, we can more easily embrace microservices, DevOps and cloud computing, and better respond to new technological challenges. Following the concept of collaboration, Spring Cloud provides us with a fill-in-the-blank development model where we focus only on the business and the user to produce great products at a faster rate of iteration.

8. To summarize

The Spring family is getting bigger and bigger, including The Spring Framework, Spring Boot, Spring Cloud, etc. If we don’t have a global understanding of it, we can easily get lost in the technical details and fail to use the product well. This paper is the author’s experience accumulated during the research and development of the company’s micro-service framework, which can be used as the index of Spring Cloud’s knowledge system for further study of a certain feature.

The main value of this article is to help you sort out the knowledge framework related to Spring Cloud, which is often referred to as the global perspective or God perspective. With this framework, we can look for related node information according to our own needs to study and learn, so as not to get lost in details. Of course, considering that each of us has different work and study situations, and the problems we encounter are also different, the content of this article cannot cover all the problems we encounter, please leave your comments and ask questions.

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