Can't use module outputs as input to another module

[mcoms]

If I try to use a module output as the input to another module, I get an error when running terraform plan, v0.3.5.

# main.tf
module "cluster_leader" {
  source = "./leader"
}

module "cluster_follower_1" {
  source = "./follower"
  leader_ip = "${module.cluster_leader.private_ip}"
}

module "cluster_follower_2" {
  source = "./follower"
  leader_ip = "${module.cluster_leader.private_ip}"
}

# leader/main.tf
...
output "private_ip" { value = "${aws_instance.server.private_ip}" }

# follower/main.tf
variable "leader_ip" {}
...

➜  terraform plan
Refreshing Terraform state prior to plan...
...
Error refreshing state: Output field 'private_ip' not found for variable 'module.cluster_leader.private_ip'

Ideally, I'd like for Terraform to calculate that the followers depend on the leader, or the option to specify depends_on for modules.

[mitchellh]

I believe this was fixed in 0.3.6. But I've tagged it as a bug and will verify later.

[xueshanf]

I am on 0.3.6 version and just tried it, same problem. Originally reported the issue on version 0.3.5, #697.

[mitchellh]

This is fixed on master, since #1010

[mcoms]

Thanks! 👍

[ghost]

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