Pass command as variable to ECS task definition

Question

Is there a way to pass a Docker command as a Terraform variable to the ECS task definition that is defined in Terraform?

Answer 1

You can try the below method to take the command as a variable with template condition if nothing is passed from the root module. service.json

[
  {
    ...
    ],
    %{ if command != "" }
    "command"  : [${command}],
    %{ endif ~}
    ...
  }
]

container.tf

data "template_file" "container_def" {
  count    = 1
  template = file("${path.module}/service.json")
  vars = {
    command        = var.command != "" ? join(",", formatlist("\"%s\"", var.command)) : ""
  }
}

main.tf

module "example" {
...
     command                 = ["httpd", "-f", "-p", "8080"]
...
}

variables.tf

variable "command" {
  default = ""
}