gistfile1.txt

// DONE

resource "aws_lambda_function" "lambda_tf" {
  function_name = "FunctionHandler"
  role          = "${aws_iam_role.iam_for_lambda.arn}"
  handler       = "Terra5::Terra5.Function::FunctionHandler"
  runtime       = "dotnetcore3.1"

  # The filebase64sha256() function is available in Terraform 0.11.12 and later
  # For Terraform 0.11.11 and earlier, use the base64sha256() function and the file() function:
  # source_code_hash = "${base64sha256(file("lambda.zip"))}"
  # source_code_hash = "${filebase64sha256("Terra7.zip")}"
  source_code_hash = "${sha256("Terra7.zip")}"
  depends_on       = ["aws_iam_role.iam_for_lambda"]

  s3_bucket = "test-tanuj1"
  s3_key    = "test/Terra7.zip"
}

// DONE

// A rold for Lambda
resource "aws_iam_role" "iam_for_lambda" {
  name = "iam_for_lambda"

  assume_role_policy = <<POLICY
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": "sts:AssumeRole",
      "Principal": {
        "Service": "lambda.amazonaws.com"
      },
      "Effect": "Allow",
      "Sid": ""
    }
  ]
}
POLICY
}

// DONE
#See also the following AWS managed policy: AWSLambdaBasicExecutionRole
resource "aws_iam_policy" "lambda_logging" {
  name        = "lambda_logging"
  path        = "/"
  description = "IAM policy for logging from a lambda"

  policy = <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": [
        "logs:CreateLogGroup",
        "logs:CreateLogStream",
        "logs:PutLogEvents"
      ],
      "Resource": "arn:aws:logs:*:*:*",
      "Effect": "Allow"
    },
            {
            "Action": [
                "dynamodb:*",
                "dax:*",
                "application-autoscaling:DeleteScalingPolicy",
                "application-autoscaling:DeregisterScalableTarget",
                "application-autoscaling:DescribeScalableTargets",
                "application-autoscaling:DescribeScalingActivities",
                "application-autoscaling:DescribeScalingPolicies",
                "application-autoscaling:PutScalingPolicy",
                "application-autoscaling:RegisterScalableTarget",
                "cloudwatch:DeleteAlarms",
                "cloudwatch:DescribeAlarmHistory",
                "cloudwatch:DescribeAlarms",
                "cloudwatch:DescribeAlarmsForMetric",
                "cloudwatch:GetMetricStatistics",
                "cloudwatch:ListMetrics",
                "cloudwatch:PutMetricAlarm",
                "datapipeline:ActivatePipeline",
                "datapipeline:CreatePipeline",
                "datapipeline:DeletePipeline",
                "datapipeline:DescribeObjects",
                "datapipeline:DescribePipelines",
                "datapipeline:GetPipelineDefinition",
                "datapipeline:ListPipelines",
                "datapipeline:PutPipelineDefinition",
                "datapipeline:QueryObjects",
                "ec2:DescribeVpcs",
                "ec2:DescribeSubnets",
                "ec2:DescribeSecurityGroups",
                "iam:GetRole",
                "iam:ListRoles",
                "kms:DescribeKey",
                "kms:ListAliases",
                "sns:CreateTopic",
                "sns:DeleteTopic",
                "sns:ListSubscriptions",
                "sns:ListSubscriptionsByTopic",
                "sns:ListTopics",
                "sns:Subscribe",
                "sns:Unsubscribe",
                "sns:SetTopicAttributes",
                "lambda:CreateFunction",
                "lambda:ListFunctions",
                "lambda:ListEventSourceMappings",
                "lambda:CreateEventSourceMapping",
                "lambda:DeleteEventSourceMapping",
                "lambda:GetFunctionConfiguration",
                "lambda:DeleteFunction",
                "resource-groups:ListGroups",
                "resource-groups:ListGroupResources",
                "resource-groups:GetGroup",
                "resource-groups:GetGroupQuery",
                "resource-groups:DeleteGroup",
                "resource-groups:CreateGroup",
                "tag:GetResources"
            ],
            "Effect": "Allow",
            "Resource": "*"
        }
    
  ]
}
EOF
}

// DONE
#attach lambda iam role with lambda logging
resource "aws_iam_role_policy_attachment" "lambda_logs" {
  role       = "${aws_iam_role.iam_for_lambda.name}"
  policy_arn = "${aws_iam_policy.lambda_logging.arn}"
  depends_on = ["aws_iam_role.iam_for_lambda", "aws_iam_policy.lambda_logging"]
}

#print out the lambda function properties
output "lambdafunction-details" {
  value = "${aws_lambda_function.lambda_tf}"
}

# DDB
// DONE
resource "aws_dynamodb_table" "example9" {
  name             = "example9"
  hash_key         = "TestTableHashKey"
  billing_mode     = "PAY_PER_REQUEST"
  stream_enabled   = true
  stream_view_type = "NEW_AND_OLD_IMAGES"

  attribute {
    name = "TestTableHashKey"
    type = "S"
  }
}

resource "aws_lambda_event_source_mapping" "exam4" {
  event_source_arn  = "${aws_dynamodb_table.example9.stream_arn}"
  function_name     = "${aws_lambda_function.lambda_tf.arn}"
  starting_position = "LATEST"
  depends_on        = ["aws_dynamodb_table.example9", "aws_lambda_function.lambda_tf"]
}