How to deploy docker in golang

With the popularity of containerization technology in recent years, Docker has become an essential tool for more and more developers, operation and maintenance personnel, IT practitioners, etc. The high concurrency advantage of Golang language has also made it the preferred language for many developers. So, how to deploy Golang applications into Docker containers? This article will introduce you to the detailed process of deploying docker in golang.

1. Install Docker

First, we need to install Docker. Docker provides multiple operating systems and installation methods for everyone to choose from. Here, we take the Ubuntu system as an example to introduce the installation method of Docker.

1. Update apt-get tools and dependencies:

sudo apt-get update

sudo apt-get install -y apt-transport-https ca-certificates curl software -properties-common

2. Configure GPG key:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

3. Add Docker source:

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

4. Update the installation package index:

sudo apt-get update

5. Install the latest version of Docker:

sudo apt-get install docker- ce

After the installation is successful, you can check the Docker version number through the docker -v command.

2. Create a Golang application project

Next, we will create a simple Golang application project. Assume that our project is named demo and the project directory structure is as follows:

demo
|—— main.go
|—— Dockerfile

Among them, the main.go file is Golang The main file of the application, the Dockerfile file is the Docker build file.

3. Write Golang application code

In the main.go file, the golang application is mainly written. Here, we write a Hello World sample program:

package main
import "fmt"
func main() {
fmt.Println("Hello World!")
}

Save and exit the file.

4. Write the Dockerfile file

Next, we also need to write the Dockerfile file, which is used to build the Docker image. Among them, Golang applications need to be built through the golang:alpine image officially provided by Golang.

In the Dockerfile file, we need to perform the following steps:

1. FROM golang:alpine
2. ADD . /go/src/demo
3. WORKDIR /go/src/demo
4. RUN go build -o main .
5. CMD ["/go/src/demo/main"]

Complete script As follows:

FROM golang:alpine
ADD . /go/src/demo
WORKDIR /go/src/demo
RUN go build -o main .
CMD ["/go/src/demo/main"]

Among them, the FROM instruction represents the base image, the ADD instruction is used to copy local files to the image file, the WORKDIR instruction is used to set the working directory, the RUN instruction is used to run commands in the image, and the CMD instruction is used Start the command for the specified container.

5. Build the Docker image

Execute the following command to build the Docker image:

docker build -t demo:v1 .

Among them, demo:v1 indicates the image name and version number, and the following . indicates the location of the Dockerfile Current directory.

After the build is successful, we can view the built image through the following command:

docker images

6. Run the Docker container

Finally, we need to run the Docker container:

docker run -it demo:v1

Among them, demo:v1 represents the built image name and version number.

After we successfully run the container, we can see the output of Hello World! on the command line, indicating that the Golang application in the container has run successfully.

At this point, we have completed all the steps to deploy the Golang application into the Docker container.

Summary

This article mainly introduces the detailed steps on how to install Docker in Ubuntu system and deploy Golang applications into Docker containers. Of course, the actual deployment process will also involve more detailed issues, such as network, security, etc. However, this article has provided you with basic ideas and methods. I believe readers can continue to accumulate experience in practice and improve their technical level.

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