open-consul/website/content/docs/ecs/requirements.mdx

---
layout: docs
page_title: Requirements - AWS ECS
description: >-
  Requirements for Consul Service Mesh on AWS ECS (Elastic Container Service).
---

# Requirements

The following requirements must be met in order to install Consul on ECS:

1. **Launch Type:** Fargate and EC2 launch types are supported.
1. **Subnets:** ECS Tasks can run in private or public subnets. Tasks must have [network access](https://aws.amazon.com/premiumsupport/knowledge-center/ecs-pull-container-api-error-ecr/) to Amazon ECR or other public container registries to pull images.
1. **Consul Servers:** You can use your own Consul servers running on virtual machines or use [HashiCorp Cloud Platform Consul](https://www.hashicorp.com/cloud-platform) to host the servers for you. For development purposes or testing, you may use the `dev-server` [Terraform module](https://github.com/hashicorp/terraform-aws-consul-ecs/tree/main) that runs the Consul server as an ECS task. The `dev-server` does not support persistent storage.
1. **ACL Controller:** If you are running a secure Consul installation with ACLs enabled, configure the ACL controller.
1. **Sidecar containers:** Consul on ECS requires two sidecar containers to run in each ECS task: a
   Consul agent container and a sidecar proxy container. These additional sidecar containers must
   be included in the ECS task definition. The [Consul ECS Terraform module](/docs/ecs/terraform/install)
   will include these sidecar containers for you. If you do not use Terraform, you can construct
   the task definition yourself by following [our documentation](/docs/ecs/manual/install).
1. **Routing:** With your application running in tasks as part of the mesh, you must specify the
   upstream services that your application calls. You will also need to change the URLs your
   application uses to ensure the application is making requests through the service mesh.
1. **Bind Address:** Once all communication is flowing through the service mesh, you should change
   the address your application is listening on to `127.0.0.1` so that it only receives requests
   through the sidecar proxy.