Terraform is an open-source infrastructure as code software tool that allows you to define and provision infrastructure resources in a safe and repeatable way. In this tutorial, we will guide you on how to use Terraform with Go Lang and AWS Lambda Function to create a real-time example.
Prerequisites
Before we begin, make sure that you have the following installed on your machine:
Creating a Go Lang Function
To create a Go Lang function, follow these steps:
- Open a terminal window and create a new directory for your Go Lang function.
- Create a new file named
main.go
in the directory. - Add the following code to the
main.go
file:
package main
import ( "fmt"
"context"
"github.com/aws/aws-lambda-go/lambda")
func Handler(ctx context.Context, name string) (string, error)
{
return fmt.Sprintf("Hello, %s!", name), nil
}
func main() {
lambda.Start(Handler)
}
In this example, we are creating a simple Lambda function that takes a name as input and returns a greeting message.
- Save the
main.go
file.
Building and Deploying the Go Lang Function
Once you have created your Go Lang function, you can build and deploy it using the following steps:
- Open a terminal window and navigate to the directory where your
main.go
file is located. - Run the following command to build your Go Lang function:
GOOS=linux GOARCH=amd64 go build -o main main.go
- Run the following command to create a ZIP file of your Go Lang function:
zip deployment.zip main
- Run the following command to deploy your Go Lang function to AWS Lambda:
aws lambda create-function --function-name my-function --runtime go1.x --handler main --zip-file fileb://./deployment.zip --role arn:aws:iam::123456789012:role/lambda-role
In this example, we are deploying the function with the name my-function
, using the go1.x
runtime, and assigning the lambda-role
IAM role.
Creating a Terraform Configuration
Once you have created and deployed your Go Lang function, you can create a Terraform configuration using the following steps:
- Create a new directory for your Terraform configuration.
- Create a new file named
main.tf
in the directory. - Add the following code to the
main.tf
file:
provider "aws" { region = "us-west-2"}resource "aws_lambda_function" "example" { function_name = "my-function" handler = "main" runtime = "go1.x" filename = "deployment.zip" role = "arn:aws:iam::123456789012:role/lambda-role"}
In this example, we are using the aws_lambda_function
resource to create a new Lambda function with the name my-function
, the go1.x
runtime, and the deployment.zip
file.
- Save the
main.tf
file.
Initializing and Applying the Terraform Configuration
Once you have created your Terraform configuration, you can initialize and apply it using the following steps:
- Open a terminal window and navigate to the directory where your
main.tf
file is located. - Run the following command to initialize Terraform:
terraform init
- Run the following command to apply your Terraform configuration:
terraform apply
- When prompted, review the changes that Terraform will make to your infrastructure and type
yes
to apply the changes. - Wait for Terraform to provision the new Lambda function.
Testing the Go Lang Function
Once you have provisioned your Lambda function, you can test it using the following steps:
- Open a terminal window and run the following command to invoke your Lambda function:
aws lambda invoke --function-name my-function --payload '{"name": "Terraform"}' output.txt
- Run the following command to view the output of your Lambda function:
cat output.txt
You should see the following output:
"Hello, Terraform!"
Conclusion
Congratulations! You have successfully used Terraform with Go Lang and AWS Lambda Function to create a real-time example. You can now use Terraform to define and provision infrastructure resources in a safe and repeatable way, and use Go Lang to create powerful Lambda functions that can be deployed to AWS.