lambda_structure.tf

data "archive_file" "lambda_zip" {
  type             = "zip"
  source_file      = "${path.module}/src/enable_disable_alarms_tf.py"
  output_file_mode = "0666"
  output_path      = "${path.module}/bin/enable_disable_alarms_tf.zip"
}

resource "aws_lambda_function" "processing_lambda" {
  filename         = data.archive_file.lambda_zip.output_path
  function_name    = local.processing_lambda_name
  handler          = "enable_disable_alarms_tf.lambda_handler"
  source_code_hash = data.archive_file.lambda_zip.output_base64sha256
  role             = aws_iam_role.processing_lambda_role.arn

  runtime = "python3.9"

  environment {
    variables = {
      action = var.action
      alarm_arns_lst = jsonencode(var.alarm_arns_lst)
    }
  }
}

resource "aws_iam_role" "processing_role" {
  name = local.role_name
  path = "/service-role/"
  assume_role_policy = data.aws_iam_policy_document.assume-role-document.json

  inline_policy {
    name   = "lambda_policy"
    policy = data.aws_iam_policy_document.alarms_policy_document.json
  }
}

data "aws_iam_policy_document" "alarms_policy_document" {
  statement {
    actions = [
          "cloudwatch:DescribeAlarms",
          "cloudwatch:DisableAlarmActions",
          "cloudwatch:EnableAlarmActions",
    ]
    resources = ["*"]
  }

  statement {
    actions = [
          "logs:CreateLogGroup",
          "logs:CreateLogStream",
          "logs:PutLogEvents",
          "logs:AssociateKmsKey"
    ]
    resources = ["*"]

  }
  
 data "aws_iam_policy_document" "assume-role-document" {
  statement {
    actions = ["sts:AssumeRole"]

    principals {
      type        = "Service"
      identifiers = ["lambda.amazonaws.com"]
    }
  }
}

}