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QuickStart: Deploy a Go application to Elastic Beanstalk - AWS Elastic Beanstalk
Your AWS accountPrerequisitesStep 1: Create a Go applicationStep 2: Deploy your Go application with the EB CLIStep 3: Run your application on Elastic BeanstalkStep 4: Clean upAWS resources for your applicationNext stepsDeploy with the console

QuickStart: Deploy a Go application to Elastic Beanstalk

This QuickStart tutorial walks you through the process of creating a Go application and deploying it to an AWS Elastic Beanstalk environment.

Not for production use

Examples are intended for demonstration only. Do not use example applications in production.

Your AWS account

If you're not already an AWS customer, you need to create an AWS account. Signing up enables you to access Elastic Beanstalk and other AWS services that you need.

If you already have an AWS account, you can move on to Prerequisites.

Sign up for an AWS account

To get started with AWS, you need an AWS account. For information about creating an AWS account, see Getting started with an AWS account in the AWS Account Management Reference Guide.

Prerequisites

To follow the procedures in this guide, you will need a command line terminal or shell to run commands. Commands are shown in listings preceded by a prompt symbol ($) and the name of the current directory, when appropriate.

~/eb-project$ this is a command
this is output

On Linux and macOS, you can use your preferred shell and package manager. On Windows you can install the Windows Subsystem for Linux to get a Windows-integrated version of Ubuntu and Bash.

EB CLI

This tutorial uses the Elastic Beanstalk Command Line Interface (EB CLI). For details on installing and configuring the EB CLI, see Install EB CLI with setup script (recommended) and Configure the EB CLI.

Step 1: Create a Go application

Create a project directory.

~$ mkdir eb-go
~$ cd eb-go

Next, create an application that you'll deploy using Elastic Beanstalk. We'll create a "Hello World" RESTful web service.

This example prints a customized greeting that varies based on the path used to access the service.

Create a text file in this directory named application.go with the following contents.

Example~/eb-go/application.go
package main

import (
	"fmt"
	"net/http"
)

func handler(w http.ResponseWriter, r *http.Request) {
	if r.URL.Path == "/" {
		fmt.Fprintf(w, "Hello World! Append a name to the URL to say hello. For example, use %s/Mary to say hello to Mary.", r.Host)
	} else {
		fmt.Fprintf(w, "Hello, %s!", r.URL.Path[1:])
	}
}

func main() {
	http.HandleFunc("/", handler)
	http.ListenAndServe(":5000", nil)
}

Step 2: Deploy your Go application with the EB CLI

Next, you create your application environment and deploy your configured application with Elastic Beanstalk.

To create an environment and deploy your Go application

  1. Initialize your EB CLI repository with the eb init command.

    ~/eb-go$ eb init -p go go-tutorial --region us-east-2
Application go-tutorial has been created.

    This command creates an application named go-tutorial and configures your local repository to create environments with the latest Go platform version.

  2. (Optional) Run eb init again to configure a default key pair so that you can use SSH to connect to the EC2 instance running your application.

    ~/eb-go$ eb init
Do you want to set up SSH for your instances?
(y/n): y
Select a keypair.
1) my-keypair
2) [ Create new KeyPair ]

    Select a key pair if you have one already, or follow the prompts to create one. If you don't see the prompt or need to change your settings later, run eb init -i.

  3. Create an environment and deploy your application to it with eb create. Elastic Beanstalk automatically builds a zip file for your application and starts it on port 5000.

    ~/eb-go$ eb create go-env

    It takes about five minutes for Elastic Beanstalk to create your environment.

Step 3: Run your application on Elastic Beanstalk

When the process to create your environment completes, open your website with eb open.

~/eb-go$ eb open

Congratulations! You've deployed a Go application with Elastic Beanstalk! This opens a browser window using the domain name created for your application.

Step 4: Clean up

You can terminate your environment when you finish working with your application. Elastic Beanstalk terminates all AWS resources associated with your environment.

To terminate your Elastic Beanstalk environment with the EB CLI run the following command.

~/eb-go$ eb terminate

AWS resources for your application

You just created a single instance application. It serves as a straightforward sample application with a single EC2 instance, so it doesn't require load balancing or auto scaling. For single instance applications Elastic Beanstalk creates the following AWS resources:

  • EC2 instance – An Amazon EC2 virtual machine configured to run web apps on the platform you choose.

    Each platform runs a different set of software, configuration files, and scripts to support a specific language version, framework, web container, or combination thereof. Most platforms use either Apache or nginx as a reverse proxy that processes web traffic in front of your web app, forwards requests to it, serves static assets, and generates access and error logs.

  • Instance security group – An Amazon EC2 security group configured to allow incoming traffic on port 80. This resource lets HTTP traffic from the load balancer reach the EC2 instance running your web app. By default, traffic is not allowed on other ports.

  • Amazon S3 bucket – A storage location for your source code, logs, and other artifacts that are created when you use Elastic Beanstalk.

  • Amazon CloudWatch alarms – Two CloudWatch alarms that monitor the load on the instances in your environment and are triggered if the load is too high or too low. When an alarm is triggered, your Auto Scaling group scales up or down in response.

  • CloudFormation stack – Elastic Beanstalk uses CloudFormation to launch the resources in your environment and propagate configuration changes. The resources are defined in a template that you can view in the CloudFormation console.

  • Domain name – A domain name that routes to your web app in the form subdomain.region.elasticbeanstalk.com.

Elastic Beanstalk manages all of these resources. When you terminate your environment, Elastic Beanstalk terminates all the resources that it contains.

Next steps

After you have an environment running an application, you can deploy a new version of the application or a different application at any time. Deploying a new application version is very quick because it doesn't require provisioning or restarting EC2 instances. You can also explore your new environment using the Elastic Beanstalk console. For detailed steps, see Explore your environment in the Getting started chapter of this guide.

After you deploy a sample application or two and are ready to start developing and running Go applications locally, see Setting up your Go development environment for Elastic Beanstalk.

Deploy with the Elastic Beanstalk console

You can also use the Elastic Beanstalk console to launch the sample application. For detailed steps, see Create an example application in the Getting started chapter of this guide.