Error: creating ELBv2 application Load Balancer (office-private-lb): ValidationError: At least two subnets in two different Availability Zones must be specified

[jacknahid]

│ Error: creating ELBv2 application Load Balancer (office-private-lb): ValidationError: At least two subnets in two different Availability Zones must be specified
│ status code: 400, request id: ad88108a-2a54-4ad1-966f-040ad87ce5cf
│
│ with module.standard.aws_lb.kasm-private-alb,
│ on module/private_alb.tf line 5, in resource "aws_lb" "kasm-private-alb":
│ 5: resource "aws_lb" "kasm-private-alb" {
│
╵
╷
│ Error: creating ELBv2 application Load Balancer (office-lb): ValidationError: At least two subnets in two different Availability Zones must be specified
│ status code: 400, request id: 54891ba2-3437-4238-99b8-efefe1413b2b
│
│ with module.standard.aws_lb.kasm-alb,
│ on module/public_alb.tf line 1, in resource "aws_lb" "kasm-alb":
│ 1: resource "aws_lb" "kasm-alb" {
│

[andrew1044]

In the standard module, the following changes are required.

1. aws/standard/variables.tf

variable "num_webapps" {
  description = "The number of WebApp role servers to create in the deployment"
  type        = number

  validation {
    condition     = var.num_webapps >= 2 && var.num_webapps <= 6 && floor(var.num_webapps) == var.num_webapps
    error_message = "Acceptable number of webapps range between 2-6."
  }
}

2. aws/standard/terraform.tfvars

num_webapps   = 2

ALB's require at least two subnets in different availability zones, you have probably scaled num_webapps = 1 in your terrafrom.tfvars.

In aws/standard/module/webapp.tf line 7 subnet_id = aws_subnet.webapp[count.index].id suggests that one subnet is created per webapp resource being created, this the minimum number of webapps required is 2.