I need to deploy 3 EC2 instances within 3 availability zones inside the same region using Terraform. I was trying to use the following structure:
variable "AVZ" {
type = "map"
default = {
eu-central-1 = ["eu-central-1a","eu-central-1b","eu-central-1c"]
eu-west-1 = ["eu-west-1a","eu-west-1b","eu-west-1c"]
}
}
and
resource "aws_instance" "web-server0" {
count = "${var.AWS_COUNT_WEB}"
availability_zone = "${element(split(",", var.AVZ), count.index)}"
ami = "${lookup(var.AWS_AMI,var.AWS_REGION)}"
key_name = "${var.AWS_KEY_NAME}"
instance_type = "${var.AWS_INSTANCE_TYPE}"
associate_public_ip_address = "true"
vpc_security_group_ids = [
"${aws_security_group.allow_ssh.id}",
"${aws_security_group.allow_web.id}"
]
tags {
Name = "web-server-b${count.index}"
Tier = "blue"
Role = "Web_Server"
}
However it did not help much. It simply does not work I'm getting the following error:
At column 11, line 1: split: argument 2 should be type string, got type
map in:
Does anybody knows how I can use variable type map, instead of string so I can map AZ to the Regions and lookup available AZs depending on Region defined and deploy EC2 instances depending on that results?
Thank you, Alex