The way to create a Lambda in Terraform

To create an AWS Lambda perform utilizing Terraform, you should outline the mandatory assets in a Terraform configuration file. Right here’s an instance of how one can create a Lambda perform utilizing Terraform:

Possibility 1 – Seperate Lambda Supply

1. Create a brand new listing to your Terraform configuration and navigate to it in your terminal.
2. Create a brand new file with a .tf extension, resembling lambda.tf, and open it in a textual content editor.
3. Within the lambda.tf file, add the next code:

supplier "aws" {
  area = "us-east-1"  # Change together with your desired AWS area
}

useful resource "aws_lambda_function" "my_lambda" {
  function_name = "my-lambda-function"
  position          = aws_iam_role.lambda_role.arn
  handler       = "index.handler"
  runtime       = "nodejs14.x"  # Change together with your desired runtime

  // Change with the trail to your Lambda perform code
  filename      = "path/to/lambda/code.zip"

  // Change with the suitable values to your Lambda perform
  surroundings {
    variables = {
      KEY   = "VALUE"
      KEY2  = "VALUE2"
    }
  }
}

useful resource "aws_iam_role" "lambda_role" {
  title = "my-lambda-role"
  assume_role_policy = <<EOF
{
  "Model": "2012-10-17",
  "Assertion": [
    {
      "Effect": "Allow",
      "Principal": {
        "Service": "lambda.amazonaws.com"
      },
      "Action": "sts:AssumeRole"
    }
  ]
}
EOF
}

useful resource "aws_iam_role_policy_attachment" "lambda_policy_attachment" {
  position       = aws_iam_role.lambda_role.title
  policy_arn = "arn:aws:iam::aws:coverage/service-role/AWSLambdaBasicExecutionRole"
}

4. Within the above code, you’ll be able to customise the next elements:

• area: Specify the AWS area the place you need to create the Lambda perform.
• runtime: Specify the runtime surroundings to your Lambda perform (e.g., nodejs14.x, python3.8, and so forth.).
• filename: Replace the trail to your Lambda perform code. Be certain that the code is packaged in a ZIP file.

You may as well modify the surroundings variables part (KEY and VALUE) in line with your necessities.

5. Save the lambda.tf file.

6. Initialize the Terraform configuration by working the next command in your terminal:

terraform init

7. As soon as the initialization is full, you’ll be able to create the Lambda perform by working the next command:

terraform apply

Terraform will analyze the configuration, immediate for affirmation, after which create the mandatory assets, together with the Lambda perform.

Possibility 2 – Inline Lambda Supply

An inline Lambda perform signifies that the perform code is outlined straight within the Terraform configuration file as an alternative of referencing an exterior code file. Right here’s an instance of how one can create an inline Lambda perform utilizing Terraform:

1. Comply with steps 1 and a pair of from the earlier reply to arrange your Terraform configuration.
2. Within the lambda.tf file, add the next code:

supplier "aws" {
  area = "us-east-1"  # Change together with your desired AWS area
}

useful resource "aws_lambda_function" "my_lambda" {
  function_name = "my-lambda-function"
  position          = aws_iam_role.lambda_role.arn
  handler       = "index.handler"
  runtime       = "nodejs14.x"  # Change together with your desired runtime

  // Outline the inline Lambda perform code
  inline_code = <<-EOT
    exports.handler = async perform(occasion, context) {
      console.log("Hiya, inline Lambda perform!");
      return {
        statusCode: 200,
        physique: "Hiya from inline Lambda!"
      };
    };
  EOT

  // Change with the suitable values to your Lambda perform
  surroundings {
    variables = {
      KEY   = "VALUE"
      KEY2  = "VALUE2"
    }
  }
}

useful resource "aws_iam_role" "lambda_role" {
  title = "my-lambda-role"
  assume_role_policy = <<EOF
{
  "Model": "2012-10-17",
  "Assertion": [
    {
      "Effect": "Allow",
      "Principal": {
        "Service": "lambda.amazonaws.com"
      },
      "Action": "sts:AssumeRole"
    }
  ]
}
EOF
}

useful resource "aws_iam_role_policy_attachment" "lambda_policy_attachment" {
  position       = aws_iam_role.lambda_role.title
  policy_arn = "arn:aws:iam::aws:coverage/service-role/AWSLambdaBasicExecutionRole"
}

3. Customise the code as wanted, such because the area, function_name, runtime, and surroundings variables.
4. Save the lambda.tf file.
5. Initialize the Terraform configuration by working terraform init in your terminal.
6. As soon as the initialization is full, create the Lambda perform by working terraform apply.

Terraform will analyze the configuration, immediate for affirmation, and create the inline Lambda perform utilizing the code offered within the inline_code block.

That’s it! You could have now created an inline Lambda perform utilizing Terraform.