terraform - 如何使用 terraform 创建具有多个子网 ID 的多个实例?
问题描述
我有 2 个服务 test1、test2 并且对于每个服务我必须创建 6 个 vm。这 6 个 vm 应该放置在 3 个子网 id 中,这些子网 id 在同一区域的 3 个不同区域中创建
在此服务中,test1 将在私有子网中,而 test2 将在公共子网中。所以我必须在创建 ec2 实例时传递正确的子网 ID
根模块:
provider "aws" {
region = var.region
}
module "ecom-vpc" {
source = "./modules/vpc"
}
module "ecom-public-subnet" {
source = "./modules/subnets/public"
vpc-id = module.ecom-vpc.vpc-id
}
module "ecom-private-subnet" {
source = "./modules/subnets/private"
vpc-id = module.ecom-vpc.vpc-id
}
module "ecom-instances-sg" {
source = "./modules/sg"
vpc-id = module.ecom-vpc.vpc-id
}
module "ecom-vm-instances" {
source = "./modules/vm"
priv-subnet-ids = module.ecom-private-subnet.ecom_private_subnets
pub-subnet-ids = module.ecom-public-subnet.ecom_public_subnets
instances-sg = module.ecom-instances-sg.ecom-inst-sg
}
从子模块 - vpc、子网、ec2
variable "service-names" {
type = list(any)
default = ["ecom-app-TEST1","ecom-app-TEST2"]
}
variable "availability_zones" {
type = map
default = {
ap-south-1a = {
private_subnet = "10.0.1.0/24"
public_subnet = "10.0.4.0/24"
}
ap-south-1b = {
private_subnet = "10.0.2.0/24"
public_subnet = "10.0.5.0/24"
}
ap-south-1c = {
private_subnet = "10.0.3.0/24"
public_subnet = "10.0.6.0/24"
}
}
}
resource "aws_vpc" "ecom-vpc" {
cidr_block = var.ecom-cidr
}
output "vpc-id" {
value = aws_vpc.ecom-vpc.id
}
resource "aws_subnet" "ecom-private" {
for_each = var.availability_zones
vpc_id = var.vpc-id
cidr_block = each.value.private_subnet
availability_zone = each.key
map_public_ip_on_launch = false
tags = {
Name = "${split("-", each.key)[2]}"
Subnet_Type = "private"
}
}
output "ecom_private_subnets" {
value = aws_subnet.ecom-private
}
resource "aws_subnet" "ecom-public" {
for_each = var.availability_zones
vpc_id = var.vpc-id
cidr_block = each.value.public_subnet
availability_zone = each.key
map_public_ip_on_launch = true
tags = {
Name = "${split("-", each.key)[2]}"
Subnet_Type = "public"
}
depends_on = [aws_internet_gateway.igw
]
}
output "ecom_public_subnets" {
value = aws_subnet.ecom-public
}
我试图通过创建一个结合服务名称、priv、公共子网 id、实例计数(2)的本地来实现同样的目的。但问题是我无法做到,因为我无法创建独特的组合键
locals {
service_subnets = {
for pair in setproduct(var.service-names, values(var.priv-subnet-ids),values(var.pub-subnet-ids),range(var.instance_count)) :
"${pair[0]}:${pair[1].availability_zone}-${pair[3]}" => {
service_name = pair[0]
priv-subnet = pair[1]
pub-subnet = pair[2]
}
}
}
resource "aws_instance" "ecom-instances" {
for_each = local.service_subnets
ami = data.aws_ami.ecom.id
instance_type = "t3.micro"
tags = {
Name = each.value.service_name
Service = each.value.service_name
}
vpc_security_group_ids = [var.instances-sg[each.value.service_name].id]
subnet_id = "${split("-", each.value.service_name)[2] == "TEST1" ? each.value.pub-subnet.id : each.value.priv-subnet.id }"
}
我收到以下错误。
Two different items produced the key "ecom-app-TEST1:ap-south-1c-1" in this 'for' expression. If duplicates are expected, use the ellipsis (...)
│ after the value expression to enable grouping by key.
If i add ... and change it as below then it is converted as tuple and i'm not sure how to get and pass the value from each.value in the aws_instance resource
locals {
service_subnets = {
for pair in setproduct(var.service-names, values(var.priv-subnet-ids),values(var.pub-subnet-ids),range(var.instance_count)) :
"${pair[0]}:${pair[1].availability_zone}-${pair[3]}" => {
service_name = pair[0]
priv-subnet = pair[1]
pub-subnet = pair[2]
}
... }
}
on modules/vm/main.tf line 60, in resource "aws_instance" "ecom-instances":
│ 60: subnet_id = "${split("-", each.value.service_name)[2] == "TEST1" ? each.value.pub-subnet.id : each.value.priv-subnet.id }"
│ ├────────────────
│ │ each.value is tuple with 3 elements
│
│ This value does not have any attributes.
Please Guide me
解决方案
You could try adding the index to your for loop and making it part of your name, might help you avoid elipsis/tuple conversion.
locals {
service_subnets = {
for index, pair in setproduct(var.service-names, values(var.priv-subnet-ids),values(var.pub-subnet-ids),range(var.instance_count)) :
"${pair[0]}:${pair[1].availability_zone}-${pair[3]}=${index}" => {
service_name = pair[0]
priv-subnet = pair[1]
pub-subnet = pair[2]
}
}
}
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