How to use golang build to quickly deploy applications

With the rapid development of the Internet, our software development is also constantly upgrading. In modern software development, rapid application deployment is crucial. Today, more and more developers are starting to use golang for development, which benefits from golang's efficiency and simplicity. In this article, we will introduce how to use golang build to quickly deploy your application.

1. Golang build introduction

Golang build is a tool officially provided by golang. Golang build compiles golang programs into executable files and can generate corresponding local executable files according to different operating systems. For cross-platform application running, golang build will make some excellent optimizations and adjustments based on the characteristics of different platforms.

2. Usage of Golang build

Golang build can be used through the following command:

go build <package>

Among them, <package> It is the path of the package that needs to be compiled, which can be a local path or a remote repository.

For example, the following command will compile the main.go file in the current path:

go build main.go

If there are multiple files in the current path, you can also use the following command to compile all files:

go build .

3. Golang build’s cross-compilation

In addition to supporting local compilation, Golang build also supports cross-compilation. In other words, compile the program in the Windows environment in the Linux environment, or compile the program in the Linux environment in the Mac environment.

This requires the use of environment variables GOOS and GOARCH, which respectively specify the operating system and CPU architecture that need to be compiled.

For example, the following command will compile a Linux amd64 architecture program on Windows:

SET GOOS=linux
SET GOARCH=amd64
go build

It should be noted that cross-compilation requires changing the environment variables to proceed. Exactly how to change environment variables is beyond the scope of this article.

4. Static compilation of Golang build

Golang build also supports static compilation, which will compile all the dependent libraries that need to be used into the executable file without installing it again. .

For example, to statically compile a Go program in a Linux system, you can enter the following command:

CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o main .

Additional explanation of the parameters in the command:

• CGO_ENABLED =0: Disable CGO
• GOOS=linux: The compiled operating system is Linux
• GOARCH=amd64: The compiled The CPU architecture is amd64
• -a: Force compilation of all packages
• -installsuffix cgo: Specify additional suffix
• -o main: Store the compiled program as main
• .: Compile all codes under the current path

5. Golang build Docker

After using golang build to compile the Go program, the generated executable file can be packaged into Docker, which facilitates the deployment and running of the program. The following is a simple Dockerfile example:

FROM docker.io/library/golang:1.14-alpine

WORKDIR /app

COPY . .

RUN go build -o main .

EXPOSE 8080

CMD ["./main"]

This Dockerfile uses the official golang:1.14-alpine as the base image, then copies all files in the current path to Docker, compiles the Go program in Docker, and then Expose the 8080 port of the application, and finally run the compiled executable file in Docker.

6. Summary

This article introduces the use of golang build and related techniques, including cross-compilation, static compilation and using Docker. Through the deployment method of golang build, we can deploy and run golang programs more conveniently and quickly.

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