kratos-layout - Microservice Architecture Simplified with Kratos Framework for Go Developers

Introducing the Kratos Layout Project

Kratos Layout is a powerful project template designed to streamline the process of creating and managing microservices using the Go programming language. By providing a robust framework, it simplifies the development lifecycle from installation to deployment. Below, you'll find a comprehensive overview of the steps and features involved in using Kratos Layout.

Installing Kratos

To get started, you need to install Kratos which serves as the foundational tool for this project:

go install github.com/go-kratos/kratos/cmd/kratos/v2@latest

This command installs Kratos via Go's package manager, setting up the essential tools for creating and managing your microservices efficiently.

Creating a Service

Once Kratos is installed, you can create a new service with the following steps:

Initialize a New Kratos Project:

Use kratos new server to set up a new project directory named server.
Add and Generate Proto Files:
- Create a new protocol buffer file:
```
kratos proto add api/server/server.proto
```
- Generate the client code from this proto file:
```
kratos proto client api/server/server.proto
```
- Generate the server source code, which forms the backbone of your microservice, using:
```
kratos proto server api/server/server.proto -t internal/service
```
Build and Run Your Service:
- Use go generate ./... to automatically generate supporting Go code from your proto definitions.
- Build the service with go build -o ./bin/ ./....
- Finally, launch your service using:
```
./bin/server -conf ./configs
```

Generating Auxiliary Files with Makefile

Kratos comes with a Makefile that helps automate the process of managing your dependencies and generating necessary files:

Run make init to download and update the dependencies.
Use make api to generate API-related files such as protobuf definitions, HTTP, gRPC, validation, and Swagger documentation.
make all will generate every required file, streamlining your setup process and ensuring consistency.

Automated Initialization with Wire

Wire is a code generation tool compatible with Kratos for wiring dependencies into your application:

First, install Wire:
```
go get github.com/google/wire/cmd/wire
```
Navigate to cmd/server and run Wire to generate the dependency injection code with:
```
wire
```

This automation serves to efficiently manage complex dependencies within your application setup.

Using Docker for Deployment

Kratos Layout supports containerization through Docker, ensuring your microservice is portable and easy to manage:

Build your Docker image with docker build -t <your-docker-image-name> .

Run your container using:

docker run --rm -p 8000:8000 -p 9000:9000 -v </path/to/your/configs>:/data/conf <your-docker-image-name>

This process makes deploying and running your microservice straightforward, leveraging Docker's capabilities for consistent environments across different platforms.

In conclusion, Kratos Layout provides a comprehensive framework for building Go-based microservices, streamlining much of the setup and operational overhead. With tools like proto builders, automated code generators, and Docker integration, it enables developers to focus more on writing business logic rather than worrying about infrastructural details.