Using the Terraform Docker Provider with a DigitalOcean droplet resource

[AlexEscalante]

I am using Terraform to create Digital Ocean droplets, and I would like to use the Docker provider to set up my app after the droplet is created, however, I can't configure the Docker provider to use the droplet:

resource "digitalocean_droplet" "dev" {
  ...
}

provider "docker" {
  host = "ssh://devops@${digitalocean_droplet.dev.ipv4_address}" # <-- this fails
}

I can't interpolate the address of the created droplet inside the provider block, I get the following error:

Error: Error initializing Docker client: unable to parse docker host

How can I get this working?

Thanks in advance for any help…