open-consul/website/content/docs/ecs/manual/acl-controller.mdx

---
layout: docs
page_title: ACL Controller Manual Installation - Consul on AWS Elastic Container Service (ECS)
description: >-
  An ACL Controller is required to configure the AWS IAM auth method on Amazon Web Services ECS. Learn how to manually install ACL controllers by defining a task and a service and then configuring role policies.
---

# Manual Installation of ACL Controller for Consul on AWS Elastic Container Service (ECS)

This topic describes how to manually deploy the ACL controller, which will automatically configure the [AWS IAM Auth Method](/consul/docs/security/acl/auth-methods/aws-iam). If you are using Terraform, refer to the [Terraform Secure Configuration](/consul/docs/ecs/terraform/secure-configuration) page to deploy the ACL controller.

## Prerequisites

* Your application tasks must include certain tags to be compatible with the ACL controller.
Refer to the [Task Tags](/consul/docs/ecs/manual/install#task-tags) section of the installation page.
* You should be familiar with configuring Consul's secure features, including how to create ACL tokens and policies. Refer to the [Consul Security tutorials](/consul/tutorials/security) for an introduction and the [ACL system](/consul/docs/security/acl) documentation for more information.
* If you are using Consul with multiple ECS clusters, each cluster requires its own instance of the ACL controller.

## Set Up Secrets

Before deploying the ACL controller for the first time, you must [store the following secrets](https://docs.aws.amazon.com/secretsmanager/latest/userguide/manage_create-basic-secret.html) from Consul in AWS Secrets Manager.

| Secret                | Sample Secret Name           | Description                                                                                                                                                               |
| --------------------- | ---------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Consul server CA cert | `my-consul-ca-cert`          | The Consul server CA Cert for the HTTPS interface. This is required if the Consul server uses a self-signed or internal CA. It is not required for Consul servers in HCP. |
| Bootstrap ACL Token   | `my-consul-bootstrap-token`  | A Consul ACL token with `acl:write` and `operator:write` permissions.                                                                                                     |

## Task Definition

You must create a task definition to deploy the ACL controller in your ECS cluster.
The ACL controller must run in the same ECS cluster that hosts your service mesh application
tasks.

The following example shows how the task definition should be configured for the ACL controller.

```json
{
  "family": "my-consul-acl-controller",
  "networkMode": "awsvpc",
  "containerDefinitions": [
    {
      "name": "acl-controller",
      "image": "public.ecr.aws/hashicorp/consul-ecs:<CONSUL_ECS_VERSION>",
      "essential": true,
      "command": ["acl-controller", "-iam-role-path", "/consul-ecs/"],
      "secrets": [
        {
          "name": "CONSUL_HTTP_TOKEN",
          "valueFrom": "arn:aws:secretsmanager:us-west-2:000000000000:secret:my-consul-bootstrap-token"
        },
        {
          "name": "CONSUL_CACERT_PEM",
          "valueFrom": "arn:aws:secretsmanager:us-west-2:000000000000:secret:my-consul-ca-cert"
        }
      ],
      "environment": [
        {
          "name": "CONSUL_HTTP_ADDR",
          "value": "<Consul server HTTP API address>"
        }
      ]
    }
  ]
}
```

You must include the following top-level fields.

| Field name    | Type    | Description                                                                  |
| -----------   | ------- | ---------------------------------------------------------------------------- |
| `family`      | string  | The task family name of your choice.                                         |
| `networkMode` | string  | Must be `awsvpc`, which is the only network mode supported by Consul on ECS. |

In the `containerDefinitions` list, include one container with the following fields.

| Field name    | Type    | Description                                                                                                                                                                                                                |
| ------------- | ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------                        |
| `name`        | string  | The container name, which should be `acl-controller`                                                                                                                                                                       |
| `image`       | string  | The `consul-ecs` image. Use our public AWS registry, `public.ecr.aws/hashicorp/consul-ecs`, to avoid rate limits.                                                                                                          |
| `command`     | list    | Should be set as shown. The startup command for the ACL controller.                                                                                                                                                        |
| `essential`   | boolean | Must be `true` to ensure the health of your application container affects the health status of the task.                                                                                                                   |
| `secrets`     | list    | Should be set as shown. Configures the secrets the ECS service will retrieve and set as environment variables in the `acl-controller` container.                                                                           |
| `environment` | string  | Must be set as shown. Configures environment variables that the ECS service will set in the `acl-controller` container. Must set the `CONSUL_HTTP_ADDR` environment variable to the HTTP(S) address of the Consul servers. |

The following CLI options are available in the `command` field of the container definition.

| Flag               | Type    | Description                                                                                   |
| ------------------ | ------- | --------------------------------------------------------------------------------------------- |
| `-iam-role-path`   | string  | Specifies the path to IAM roles trusted by the AWS IAM auth method created by the controller. |
| `-log-level`       | string  | The log level for the ACL controller. Can be set to `DEBUG` for additional detail.            |

The following describes the entries to include in the `secrets` list.

| Name                | Description                                                                                                                                    |
| ------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- |
| `CONSUL_HTTP_TOKEN` | Must be set to the secret containing the bootstrap ACL token.                                                                                  |
| `CONSUL_CACERT_PEM` | If applicable, should be set to the secret containing the Consul server CA certificate. This must not be set when using Consul servers in HCP. |

## ECS Service

Once the task definition is created, define an ECS service in order to start an ACL controller task.

The following example contains the recommended settings for the ACL controller. Refer to
the [ECS service](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/service_definition_parameters.html) documentation
to complete the remaining details for your use case.

```json
{
   "cluster": "<Your ECS cluster ARN>"
   "desiredCount": 1,
   "launchType": "FARGATE",
   "serviceName": "my-acl-controller",
   "taskDefinition": "<task definition ARN>",
   ...
}
```

| Field name       | Type    | Description                                                                                                      |
| ---------------- | ------- | ---------------------------------------------------------------------------------------------------------------- |
| `cluster`        | string  | Set to your ECS cluster name or ARN. This must be the same ECS cluster where your service mesh applications run. |
| `desiredCount`   | integer | Must be `1`. Only one instance of the ACL controller should run per ECS cluster.                                   |
| `launchType`     | string  | Consul on ECS supports both the `FARGATE` and `EC2` launch types.                                                |
| `serviceName`    | string  | The service name of your choice.                                                                                 |
| `taskDefinition` | string  | Must be set to the ACL controller [task definition](/consul/docs/ecs/manual/acl-controller#task-definition).            |

## AWS IAM Roles

The ECS task and execution roles must be configured to allow the ACL controller access
to the ECS API and Secrets Manager API.

### Task Role Policy

The following example shows the policy needed for the ECS task role for the ACL controller.
This grants the ACL controller permission to list tasks, describe tasks, and read and update
secrets.

```json
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "ecs:ListTasks",
        "ecs:DescribeTasks"
      ],
      "Resource": ["*"]
    }
  ]
}
```

The following are the required permissions.

| Action                | Resource  | Description                                                  |
| --------------------- | --------- | ------------------------------------------------------------ |
| `ecs:ListTasks`       | `*`       | Allow the ACL controller to watch for new tasks.             |
| `ecs:DescribeTasks`   | `*`       | Allow the ACL controller to retrieve details for new tasks.  |

### Execution Role Policy

The following IAM policy document allows ECS to retrieve secrets needed
to start the ACL controller task from AWS Secrets Manager, including the ACL
bootstrap token.

The following example shows the policy needed for the execution role.

```json
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "secretsmanager:GetSecretValue"
      ],
      "Resource": [
        "arn:aws:secretsmanager:us-west-2:000000000000:secret:my-consul-bootstrap-token",
        "arn:aws:secretsmanager:us-west-2:000000000000:secret:my-consul-ca-cert"
      ]
    }
  ]
}
```

The following are the required permissions.

| Action                          | Resource                                                      | Description                                                            |
| ------------------------------- | ------------------------------------------------------------- | ---------------------------------------------------------------------- |
| `secretsmanager:GetSecretValue` | `arn:aws:secretsmanager:us-west-2:000000000000:secret:<NAME>` | Allow ECS to retrieve this secret and inject the secret into the task. |