Datadog AWS Integration Automated Setup

datadog-role-delegation.tf

# Read more about variables and how to override them here:
# https://www.terraform.io/docs/configuration/variables.html
variable "aws_region" {
  type    = "string"
  default = "us-east-1"
}

variable "shared_secret" {
  type    = "string"
  default = "SOOPERSEKRET"
}

provider "aws" {
  region = "${var.aws_region}"
}

resource "aws_iam_policy" "dd_integration_policy" {
  name        = "DatadogAWSIntegrationPolicy"
  path        = "/"
  description = "DatadogAWSIntegrationPolicy"

  policy = <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": [
        "autoscaling:Describe*",
        "cloudtrail:DescribeTrails",
        "cloudtrail:GetTrailStatus",
        "cloudwatch:Describe*",
        "cloudwatch:Get*",
        "cloudwatch:List*",
        "ec2:Describe*",
        "ec2:Get*",
        "ecs:Describe*",
        "ecs:List*",
        "elasticache:Describe*",
        "elasticache:List*",
        "elasticloadbalancing:Describe*",
        "elasticmapreduce:List*",
        "iam:Get*",
        "iam:List*",
        "kinesis:Get*",
        "kinesis:List*",
        "kinesis:Describe*",
        "logs:Get*",
        "logs:Describe*",
        "logs:TestMetricFilter",
        "rds:Describe*",
        "rds:List*",
        "route53:List*",
        "s3:GetBucketTagging",
        "ses:Get*",
        "ses:List*",
        "sns:List*",
        "sns:Publish",
        "sqs:GetQueueAttributes",
        "sqs:ListQueues",
        "sqs:ReceiveMessage"
      ],
      "Effect": "Allow",
      "Resource": "*"
    }
  ]
}
EOF
}

resource "aws_iam_role" "dd_integration_role" {
  name = "DatadogAWSIntegrationRole"

  assume_role_policy = <<EOF
{
  "Version": "2012-10-17",
  "Statement": {
    "Effect": "Allow",
    "Principal": { "AWS": "arn:aws:iam::464622532012:root" },
    "Action": "sts:AssumeRole",
    "Condition": { "StringEquals": { "sts:ExternalId": "${var.shared_secret}" } }
  }
}
EOF
}

resource "aws_iam_policy_attachment" "allow_dd_role" {
  name       = "Allow Datadog PolicyAccess via Role"
  roles      = ["${aws_iam_role.dd_integration_role.name}"]
  policy_arn = "${aws_iam_policy.dd_integration_policy.arn}"
}

output "AWS Account ID" {
  value = "${aws_iam_role.dd_integration_role.arn}"
}

output "AWS Role Name" {
  value = "${aws_iam_role.dd_integration_role.name}"
}

output "AWS External ID" {
  value = "${var.shared_secret}"
}

output.sh-session

$ TF_VAR_shared_secret=some-complex-generated-shared-secret terraform apply
... <snip> ...

Apply complete! Resources: 3 added, 0 changed, 0 destroyed.

The state of your infrastructure has been saved to the path
below. This state is required to modify and destroy your
infrastructure, so keep it safe. To inspect the complete state
use the `terraform show` command.

State path: terraform.tfstate

Outputs:

  AWS Account ID  = arn:aws:iam::123456789012:role/DatadogAWSIntegrationRole
  AWS External ID = some-complex-generated-shared-secret
  AWS Role Name   = DatadogAWSIntegrationRole

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