ecs-exec

pip installable bin to allow user to exec commands inside containers running on AWS ECS Fargate that relies on terraformed infrastructure.

Motivation

• Run commands inside containers defined by terraform on AWS ECS Fargate.

Installation

$ pip install ecs-exec

Usage

At minimum a terraform module which will output the following:

output "cluster_id" {
  value = "${var.cluster_id}"
}

output "main_task_arn" {
  value = "${var.main_task_arn}"
}

cluster_id is used to identify the ECS cluster, and main_task_arn is used to identify the main task in the ECS cluster. This also assumes that you have configured the following to allow ECS exec:

• ECS cluster
• ECS task
• AWS user

Once you have applied the terraform configuration, pull the output into json:

$ terraform output -json custom_ecs_service > custom_ecs_service.json

Now you can run your command inside a specific container

AWS_PROFILE=staging ecs-exec --file custom_ecs_service.json --container php-fpm --command bash

If you do not know the container name upfront then not supplying the container will print out valid container names.

Output

Output will look something like:

AWS_PROFILE=staging ecs-exec --file custom_ecs_service.json --container php-fpm --command "date +%F"

The Session Manager plugin was installed successfully. Use the AWS CLI to start a session.


Starting session with SessionId: ecs-execute-command-qNq9bIy0uTrZlriS
This session is encrypted using AWS KMS.
2021-06-25


Exiting session with sessionId: ecs-execute-command-qNq9bIy0uTrZlriS.