Terraform

Question

我有创建和运行几个模块的 terraform 代码——VPC、网络、ansible 和 Jenkins。我需要根据真值或假值创建 Ansible 和 Jenkins 模块的选项。

当我试图注释掉 Jenkins 模块时，我需要删除所有相关变量，这是一个混乱。我需要从根文件夹（变量、tfvars 和输出文件）和网络模块中注释掉变量，因为我正在传递 Jenkins 安全组 ID。

有没有一种聪明的方法可以在不编辑文件的情况下选择哪些模块应该被排除在外，包括它们的变量？

根文件夹 - Main.tf

module "network" {
     source = "./modules/network"
     vpc_id = module.vpc.vpcid
     number_of_public_subnets = 2
     number_of_private_subnets = 2
     public-subnet-block = var.public-subnet-block
     private-subnet-block = var.private-subnet-block
     availability_zone = var.availability_zone
     gateway_id = module.vpc.gwid
     tag_enviroment= var.tag_enviroment
     project_name = var.project_name
     **jenkins_server_target_group_arn = module.jenkins.jenkins-server-target-group-arn**

}
module "ansible-server"{
     source = "./modules/ansible-server"
     ami_id = "ami-04505e74c0741db8d"
     instance_type = var.ansible_server_instance-type
     availability_zone = var.availability_zone[0]
     subnet_id = module.network.public-subnet-id[0]
     tag_enviroment= var.tag_enviroment
     project_name = var.project_name
     vpc_id = module.vpc.vpcid
     key_name  = aws_key_pair.mid_project_key.key_name
     private_key_file_name = var.private_key_file_name
     iam_instance_profile   = aws_iam_instance_profile.ec2-role.name
     depends_on = [local_file.mid_project_key]
}

module "jenkins"{
     source = "./modules/jenkins"
     ami_id = "ami-0e472ba40eb589f49"
     jenkins_nodes_number_of_server = 2
     jenkins-server-instance-type = var.jenkins-server-instance-type
     jenkins-node-instance-type = var.jenkins-node-instance-type
     private_subnet_id = module.network.private-subnet-id
     tag_enviroment= var.tag_enviroment
     project_name = var.project_name
     vpc_id = module.vpc.vpcid
     key_name  = aws_key_pair.mid_project_key.key_name
     private_key_file_name = var.private_key_file_name
     iam_instance_profile   = aws_iam_instance_profile.ec2-role.name
     alb1_security_group_id = module.network.alb1-security-group-id
}

根文件夹 - Main.tf variables.tf

variable "ansible_server_instance-type" {
  type = string
  default = "t2.micro"
}
variable "private-subnet-block" {
  type = list(string)
}
variable "public-subnet-block" {
  type = list(string)
}
variable "availability_zone" {}
variable "private_key_file_name" {}
variable "consul-instance-type" {}
variable "jenkins-node-instance-type" {}
variable "jenkins-server-instance-type" {}

根文件夹 - terraform.tfvars

jenkins-node-instance-type = "t2.micro"
jenkins-server-instance-type = "t2.micro"

模块文件夹 -> main.tf

resource "aws_alb_listener" "jenkins" {
  load_balancer_arn = aws_alb.alb1.arn
  port              = "9000"
  protocol          = "HTTP"

  default_action {
    type             = "forward"
    target_group_arn = var.jenkins_server_target_group_arn
  }
}

模块文件夹 -> varibles.tf

variable "jenkins_server_target_group_arn" {}

Answer 1

count meta argument can help you here. Just create 0 or 1 instances of the module depending on the outcome of a conditional expression.

variable "create_ansible_server {
  type    = bool
}

...

module "ansible-server"{
  source = "./modules/ansible-server"
  count  = var.create_ansible_server ? 1 : 0
  ...
}

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