如何使用地形循环创建模板

Question

我想通过基于列表变量(email_addresss(的loping，使用terraform template_file创建CFT。以下是我试图生成的变量和模板。

variables:-
emails_addresses = ["[e-mail]", "[e-mail]"]
sns_arn = "arn:aws:sns:us-east-1:xxxxxx:xxxx"
protocol = "email"

需要模板：

{
"AWSTemplateFormatVersion": "2010-09-09",
"Resources": {
"sample-1": {
"Type": "AWS::SNS::Subscription",
"Properties": {
"Endpoint": "[e-mail]",
"Protocol": "email",
"TopicArn": "arn:aws:sns:us-east-1:xxxx:xxxxx"
}
},
"sample-2": {
"Type": "AWS::SNS::Subscription",
"Properties": {
"Endpoint": "[e-mail]",
"Protocol": "email",
"TopicArn": "arn:aws:sns:us-east-1:xxx:xxxx"
}
}
}
}

CFT中的资源名称可以是一些随机字符串，但在多个计划/应用程序的情况下，每个邮件的名称应该相同。

Answer 1

由于json的原因，这个有点棘手。此外，我会使用templatefile而不是template_file，因为您可以将列表传递到其中

variable "emails_addresses" {
default = ["[e-mail]", "[e-mail]"]
}
variable "sns_arn" {
default = "arn:aws:sns:us-east-1:xxxxxx:xxxx"
}
variable "protocol" {
default = "email"
}
output "test" {
value = templatefile("./email-sns-stack.json.tpl", {
emails_addresses = var.emails_addresses,
sns_arn = var.sns_arn,
protocol = var.protocol  
})
}

其中email-sns-stack.json.tpl为：

{
"AWSTemplateFormatVersion": "2010-09-09",
"Resources": ${jsonencode(
{for email_address in emails_addresses: 
split("@",email_address)[0] => {
Type = "AWS::SNS::Subscription"
Properties = {
"Endpoint" = email_address
"Protocol" = protocol
"TopicArn" = sns_arn          
}
}})}
}

为了可读性，经过漂亮的json格式化后的输出：

{
"AWSTemplateFormatVersion": "2010-09-09",
"Resources": {
"sample-1": {
"Properties": {
"Endpoint": "[e-mail]",
"Protocol": "email",
"TopicArn": "arn:aws:sns:us-east-1:xxxxxx:xxxx"
},
"Type": "AWS::SNS::Subscription"
},
"sample-2": {
"Properties": {
"Endpoint": "[e-mail]",
"Protocol": "email",
"TopicArn": "arn:aws:sns:us-east-1:xxxxxx:xxxx"
},
"Type": "AWS::SNS::Subscription"
}
}
}