open-consul/website/content/docs/ecs/terraform/secure-configuration.mdx

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---
layout: docs
page_title: Secure Configuration - AWS ECS
description: >-
Secure Configuration of the Consul Service Mesh on AWS ECS (Elastic Container Service) with Terraform.
---
# Secure Configuration
For a production-ready installation of Consul on ECS, you will need to make sure that the cluster is secured.
A secure Consul cluster should include the following:
1. [TLS Encryption](/docs/security/encryption#rpc-encryption-with-tls) for RPC communication between Consul clients and servers.
1. [Gossip Encryption](/docs/security/encryption#gossip-encryption) for encrypting gossip traffic.
1. [Access Control (ACLs)](/docs/security/acl) for authentication and authorization for Consul clients and services on the mesh.
-> **NOTE:** This page assumes that you have already configured your Consul server with the above features.
## Deploy ACL Controller
Before deploying your service, you will need to deploy the [ACL controller](https://registry.terraform.io/modules/hashicorp/consul-ecs/aws/latest/submodules/acl-controller) so that it can provision the necessary tokens
for tasks on the service mesh. To learn more about the ACL Controller, please see [Automatic ACL Token Provisioning](/docs/ecs/architecture#automatic-acl-token-provisioning).
To deploy the controller, you will first need to store an ACL token with `acl:write` and `operator:write` privileges,
and a CA certificate for the Consul server in AWS Secrets Manager.
```hcl
resource "aws_secretsmanager_secret" "bootstrap_token" {
name = "bootstrap-token"
}
resource "aws_secretsmanager_secret_version" "bootstrap_token" {
secret_id = aws_secretsmanager_secret.bootstrap_token.id
secret_string = "<bootstrap token>"
}
resource "aws_secretsmanager_secret" "ca_cert" {
name = "server-ca-cert"
}
resource "aws_secretsmanager_secret_version" "ca_cert" {
secret_id = aws_secretsmanager_secret.ca_cert.id
secret_string = "<CA certificate for the Consul server's HTTPS endpoint>"
}
```
Use the [`acl-controller` terraform module](https://registry.terraform.io/modules/hashicorp/consul-ecs/aws/latest/submodules/acl-controller?tab=inputs) to deploy the controller:
```hcl
module "acl_controller" {
source = "hashicorp/consul/aws-ecs//modules/acl-controller"
consul_bootstrap_token_secret_arn = aws_secretsmanager_secret.bootstrap_token.arn
consul_server_http_addr = "https://consul-server.example.com:8501"
consul_server_ca_cert_arn = aws_secretsmanager_secret.ca_cert.arn
ecs_cluster_arn = "arn:aws:ecs:my-region:111111111111:cluster/consul-ecs"
region = "my-region"
subnets = ["subnet-abcdef123456789"]
name_prefix = "consul-ecs"
}
```
The `name_prefix` parameter is used to prefix any secrets that the ACL controller will
update in AWS Secrets Manager.
-> **NOTE:** Make sure that the `name_prefix` is unique for each ECS cluster where you are
deploying this controller.
## Deploy Services
Once the ACL controller is up and running, you will be able to deploy services on the mesh using the [`mesh-task` module](https://registry.terraform.io/modules/hashicorp/consul-ecs/aws/latest/submodules/mesh-task).
Start with the basic configuration for the [Task Module](/docs/ecs/terraform/install#task-module) and specify additional settings to make the configuration production-ready.
First, you will need to create an AWS Secrets Manager secret for the gossip encryption key that the Consul clients
should use.
```hcl
resource "aws_secretsmanager_secret" "gossip_key" {
name = "gossip-encryption-key"
}
resource "aws_secretsmanager_secret_version" "gossip_key" {
secret_id = aws_secretsmanager_secret.gossip_key.id
secret_string = "<Gossip encryption key>"
}
```
Next, add the following configurations to enable secure deployment. Note that the `acl_secret_name_prefix`
should be the same as the `name_prefix` you provide to the ACL controller module.
```hcl
module "my_task" {
source = "hashicorp/consul/aws-ecs//modules/mesh-task"
family = "my_task"
...
tls = true
consul_server_ca_cert_arn = aws_secretsmanager_secret.ca_cert.arn
gossip_key_secret_arn = aws_secretsmanager_secret.gossip_key.arn
acls = true
consul_client_token_secret_arn = module.acl_controller.client_token_secret_arn
acl_secret_name_prefix = "consul-ecs"
}
```
Now you can deploy your services! Follow the rest of the steps in the [Installation instructions](/docs/ecs/terraform/install#task-module)
to deploy and connect your services.