Terraform unable to get docker to join swarm

Question

I'm trying to use Terraform to spin up some EC2 server which I configure Docker swarm to run on

I'm getting the following error

aws_instance.swarm-node.0 (remote-exec): Connected!
aws_instance.swarm-node.0 (remote-exec): Cannot connect to the Docker daemon. Is the docker daemon running on this host?
aws_instance.swarm-node.0 (remote-exec): flag needs an argument: --token
aws_instance.swarm-node.0 (remote-exec): See 'docker swarm join --help'.

The code that uses --token

provisioner "remote-exec" {
  inline = [
    "echo ===================================",
    "echo JOIN-TOKEN: `docker -H ${aws_instance.swarm-manager.0.private_ip} swarm join-token -q` ",
    "echo ===================================",
    "echo ===================================",
    "sudo docker swarm join ${aws_instance.swarm-manager.0.private_ip}:2377 --token $(docker -H ${aws_instance.swarm-manager.0.private_ip} swarm join-token -q worker)"
  ]
}

The output from the command above:

aws_instance.swarm-node.1 (remote-exec): Usage:  docker swarm join-token [-q] [--rotate] (worker|manager)

aws_instance.swarm-node.1 (remote-exec): Manage join tokens
aws_instance.swarm-node.1 (remote-exec): JOIN-TOKEN:
aws_instance.swarm-node.1 (remote-exec): ===================================
aws_instance.swarm-node.1 (remote-exec): ===================================
aws_instance.swarm-node.1 (remote-exec): ===================================
aws_instance.swarm-node.1 (remote-exec): ===================================
aws_instance.swarm-node.1 (remote-exec): ===================================
aws_instance.swarm-node.1 (remote-exec): Cannot connect to the Docker daemon. Is the docker daemon running on this host?
aws_instance.swarm-node.1 (remote-exec): flag needs an argument: --token

Where am i going wrong?

Answer 1

4th line of your code is incomplete

You must specify what token you want to print [worker|manager]