amazon web services - Terraform stalls while trying to get IP addresses of multiple instances? -

so using terraform provision ec2 instances , openstack instances. trying reference ip addresses of instances creating because need run commands use them (to set consul). after adding references these variables terraform stalls out , absolutely nothing after run terraform apply or terraform plan:

here sample of resource block trying run:

resource "aws_instance" "consul" {   count = 3   ami = "ami-ce5a9fa3"   instance_type = "t2.micro"   key_name = "ansible_aws"   tags {     name = "consul"   }    connection {     user = "ubuntu"     private_key="${file("/home/ubuntu/.ssh/id_rsa")}"     agent = true     timeout = "3m"   }    provisioner "remote-exec" {     inline = [       "sudo apt-get update",       "sudo apt-get install -y curl",       "echo ${aws_instance.consul.0.private_ip} >> /home/ubuntu/test.txt",       "echo ${aws_instance.consul.1.private_ip} >> /home/ubuntu/test.txt",       "echo ${aws_instance.consul.2.private_ip} >> /home/ubuntu/test.txt"     ]   } } 

update: tried running similar command openstack cloud , got same problem:

  provisioner "remote-exec" {     inline = [       "sudo apt-get update",       "sudo apt-get install -y curl",       "echo ${openstack_compute_instance_v2.consul.0.network.0.fixed_ip_v4}",       "echo ${openstack_compute_instance_v2.consul.1.network.1.fixed_ip_v4}",       "echo ${openstack_compute_instance_v2.consul.2.network.2.fixed_ip_v4}"     ]   } 

so have found if instead use 1 of ip addresses other instances wont created until first instance created, in block below:

  provisioner "remote-exec" {     inline = [       "echo ${openstack_compute_instance_v2.consul.0.network.0.fixed_ip_v4}",     ]   } 

i need instances created @ same time , have access ip addresses of other instances created created.

so taking longer @ looks issue terraform gets locked dependency cycle.

that same issue includes workaround using null_resource connect of provisioned instances , run script against them.

for use case use this:

resource "aws_instance" "consul" {   count = 3   ami = "ami-ce5a9fa3"   instance_type = "t2.micro"   key_name = "ansible_aws"   tags {     name = "consul"   } }  resource "null_resource" "configure-consul-ips" {   count = 3    connection {     user = "ubuntu"     private_key="${file("/home/ubuntu/.ssh/id_rsa")}"     agent = true     timeout = "3m"   }    provisioner "remote-exec" {     inline = [       "sudo apt-get update",       "sudo apt-get install -y curl",       "sudo echo '${join("\n", aws_instance.consul.*.private_ip)}' > /home/ubuntu/test.txt"     ]   } } 

this should bring 3 instances , connect them, install curl , create file new line separated list of private ip addresses of 3 instances.