A consul development server example using terraform and docker.

consul_dev_server_cluster_with_terraform_and_docker.tf

# Find consul image.
resource "docker_image" "consul" {
  name = "consul"
}

# Basically doing the following command:
# docker run -d --name=consul-server-1 -p 8500:8500 consul agent -dev -client=0.0.0.0 -bind=0.0.0.0
resource "docker_container" "consul-bootstrap-server" {
  count = 1
  name  = "consul-server-1"
  image = "${docker_image.consul.latest}"
  command = ["consul", "agent", "-dev", "-client=0.0.0.0", "-bind=0.0.0.0"]
  
  ports {
    internal = 8500
    external = 8500
  }
}

# Basically doing the following commands:
# IP=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' c1); echo $IP
# docker run -d --name consul-server-2 consul agent -dev -bind=0.0.0.0 -join=$IP
# docker run -d --name consul-server-3 consul agent -dev -bind=0.0.0.0 -join=$IP
resource "docker_container" "other-consul-servers" {
  depends_on = ["docker_container.consul-bootstrap-server"]
  
  count = 2
  name  = "consul-server-${count.index+2}"
  image = "${docker_image.consul.latest}"
  command = ["consul", "agent", "-dev", "-bind=0.0.0.0", "-join=${docker_container.consul-bootstrap-server.ip_address}"]
}