Terraform 0.12 json public IP via http data provider, jsondecode, for all your 'where am I actually running this build needs' - my_public_ip.tf

my_public_ip.tf

data "http" "my_public_ip" {
  url = "https://ifconfig.co/json"
  request_headers = {
    Accept = "application/json"
  }
}

locals {
  ifconfig_co_json = jsondecode(data.http.my_public_ip.body)
}

output "my_ip_addr" {
  value = local.ifconfig_co_json.ip
}

This is an IPv4 single IP ingress rule example with ICMP.

ingress {
  from_port = 0
  to_port = 0
  protocol = "-1"
  cidr_blocks = ["${local.ifconfig_co_json.ip)}/32"]
}

This works against any URL running this project's service : https://github.com/mpolden/echoip