使用Terraform.workspace选项时Terraform插值引发错误

Question

因此，我尝试使用public scheme和terraform.workspace进行插值I-e，以便动态选择子网。尝试将terraform.workspace与elb_subnets合并，但其抛出的错误是仅支持'terraform.X'插值的键为'workspace'

variable "elb_scheme" {
default = "public"
}
variable "prod_elb_subnets" {
type = "map"
default = {
public  = "subnet-23ywe324, subnet-234hj34, subnet-cdh7868"
private = "subnet-hj3h2323, subnet-jihi782, subnet-237dew"
}
}
variable "qa_elb_subnets" {
type = "map"
default = {
public  = "subnet-234ee234, subnet-da238sdf, subnet-sd2233"
private = "subnet-09jsdf23, subnet-hi232rf, subnet-89832w32"
}
}
setting {
namespace = "aws:ec2:vpc"
name      = "ELBSubnets"
value = "${var.(terraform.workspace_elb_subnets["${var.elb_scheme}"])}"
}

输出：

Error: module.ebs.aws_elastic_beanstalk_environment.beanstalk: 1 error(s) occurred:
* module.ebs.aws_elastic_beanstalk_environment.beanstalk: terraform.workspace_elb_subnets: only supported key for 'terraform.X' interpolations is 'workspace'

Terraform工作区

terraform workspace list
default
* qa

Answer 1

您可以通过使用嵌套映射并使用terraform.workspace作为键来实现所需的结果。像这样

variable "elb_scheme" {
default = "public"
}
variable "subnets" {
type = "map"
default = {
prod = {
public  = "subnet-23ywe324, subnet-234hj34, subnet-cdh7868"
private = "subnet-hj3h2323, subnet-jihi782, subnet-237dew"
}
qa = {
public  = "subnet-234ee234, subnet-da238sdf, subnet-sd2233"
private = "subnet-09jsdf23, subnet-hi232rf, subnet-89832w32"
}
}
}
output "my_subnets" {
value = "${lookup(var.subnets[terraform.workspace],"${var.elb_scheme}")}"
}