When using terraform to create a swarm on DigitalOcean, how can I pass the join-token to a worker node? I can create a simple 2-node swarm; a manager node and a worker node; but there does not seem to be an efficient way to pass the join-token to the worker node…

Code snippet manager node
provisioner “remote-exec” {
inline = [
“sudo ufw allow 2377,7946/tcp”,
“sudo ufw allow 4789,7946/udp”,
“sudo docker swarm init –advertise-addr ${digitaloceandroplet.manager1.ipv4address_private}”
]
}

Code snippet worker node
provisioner “remote-exec” {
inline = [
“sudo ufw allow 2377,7946/tcp”,
“sudo ufw allow 4789,7946/udp”,
“docker swarm join –token ${var.workertoken} ${digitaloceandroplet.manager1.ipv4addressprivate}:2377”
]
}

If I issue this command: docker swarm join-token -q worker I can display the token, but cannot save it to the variable ${var.worker_token}
Example: “docker swarm join-token worker -q > ${var.worker_token}”

Does anyone have some insight on how to assign the output of a command to a variable and reference it later in the terraform plan?

Thank you