README.md

Day 22: Containerization with Go

Overview

This day focuses on Containerization with Go. You will learn how to build and manage Docker containers using Go and explore libraries like docker/docker.

Tasks

• Task 1: Write a Dockerfile to containerize a Go application.
• Task 2: Use the docker/docker library to interact with Docker from a Go program.
• Task 3: Build a CLI tool to manage Docker containers (e.g., start, stop, list).

Resources

• Docker Documentation
• Docker Go SDK
• Building Minimal Docker Images for Go Applications

Example Code

// Example: Listing Docker Containers with Go
package main

import (
    "context"
    "fmt"
    "github.com/docker/docker/api/types"
    "github.com/docker/docker/client"
)

func main() {
    cli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
    if err != nil {
        panic(err)
    }

    containers, err := cli.ContainerList(context.Background(), types.ContainerListOptions{All: true})
    if err != nil {
        panic(err)
    }

    for _, container := range containers {
        fmt.Printf("Container ID: %s, Image: %s, Status: %s\n", container.ID[:10], container.Image, container.Status)
    }
}

Exercises

• Write a Dockerfile to containerize a Go application and build the image.
• Use the docker/docker library to create a Go program that starts and stops containers.
• Build a CLI tool to list all running containers and their statuses.