Tips on how to create a Lambda in Terraform

To create an AWS Lambda perform utilizing Terraform, it is advisable to outline the mandatory sources 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, corresponding to 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"  # Substitute 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"  # Substitute together with your desired runtime

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

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

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

4. Within the above code, you may 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 many others.).
• filename: Replace the trail to your Lambda perform code. Be sure that the code is packaged in a ZIP file.

You can too modify the surroundings variables part (KEY and VALUE) in accordance with your necessities.

5. Save the lambda.tf file.

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

terraform init

7. As soon as the initialization is full, you may create the Lambda perform by operating the next command:

terraform apply

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

Possibility 2 – Inline Lambda Supply

An inline Lambda perform implies 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 couple 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"  # Substitute 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"  # Substitute together with your desired runtime

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

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

useful resource "aws_iam_role" "lambda_role" {
  identify = "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.identify
  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 operating terraform init in your terminal.
6. As soon as the initialization is full, create the Lambda perform by operating 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’ve now created an inline Lambda perform utilizing Terraform.