Playground

Your configuration, your state, your cloud, and nothing graded. Break whatever you like — and use the panel below to change something outside the tool, which is the only way drift makes sense.

The configuration

variable "environment" {
  type    = string
  default = "prod"
}

locals {
  common_tags = {
    environment = var.environment
    managed_by  = "opentofu"
    team        = "orders"
  }

# Which /24 each zone gets. Written out rather than derived, because
  # deriving it from the key is how three subnets end up sharing a range.
  subnet_numbers = {
    a = 1
    b = 2
    c = 3
  }
}

resource "cloud_vpc" "main" {
  cidr_block           = "10.0.0.0/16"
  enable_dns_hostnames = true
  tags                 = merge(local.common_tags, { name = "orders-main" })
}

resource "cloud_subnet" "private" {
  for_each = toset(["a", "b", "c"])

vpc_id                  = cloud_vpc.main.id
  cidr_block              = cidrsubnet(cloud_vpc.main.cidr_block, 8, lookup(local.subnet_numbers, each.key, 0))
  availability_zone       = "eu-west-1${each.key}"
  map_public_ip_on_launch = false
  tags                    = merge(local.common_tags, { name = "orders-private-${each.key}" })
}

resource "cloud_security_group" "database" {
  name        = "orders-database"
  description = "Managed by Terraform"
  vpc_id      = cloud_vpc.main.id
  tags        = local.common_tags
}

resource "cloud_security_group" "web" {
  name        = "orders-web"
  description = "Managed by Terraform"
  vpc_id      = cloud_vpc.main.id
  tags        = local.common_tags
}

resource "cloud_iam_role" "application" {
  name               = "orders-application"
  assume_role_policy = "{\"Version\":\"2012-10-17\",\"Statement\":[]}"
  description        = "The orders service"
  tags               = local.common_tags
}

resource "cloud_iam_policy" "bucket_access" {
  name        = "orders-bucket-access"
  policy      = "{\"Version\":\"2012-10-17\",\"Statement\":[]}"
  description = "Read and write the orders bucket"
  tags        = local.common_tags
}

resource "cloud_bucket" "uploads" {
  bucket        = "orders-uploads-eu-west-1"
  force_destroy = false
  tags          = local.common_tags
}

resource "cloud_db_instance" "primary" {
  identifier              = "orders-primary"
  instance_class          = "db.r6g.large"
  engine                  = "postgres"
  engine_version          = "16.4"
  username                = "app"
  password                = "correct-horse-battery-staple"
  db_name                 = "orders"
  allocated_storage       = 100
  storage_encrypted       = true
  availability_zone       = "eu-west-1a"
  multi_az                = false
  db_subnet_group_name    = "orders-private"
  backup_retention_period = 7
  skip_final_snapshot     = false
  tags                    = local.common_tags
}

resource "cloud_instance" "worker" {
  count = 3

ami                    = "ami-0a1b2c3d4e5f60718"
  instance_type          = "t3.medium"
  subnet_id              = cloud_subnet.private["a"].id
  availability_zone      = "eu-west-1a"
  vpc_security_group_ids = [cloud_security_group.web.id]
  monitoring             = false
  tags                   = merge(local.common_tags, { name = "orders-worker" })
}

resource "cloud_lb" "public" {
  name                       = "orders-public"
  internal                   = false
  load_balancer_type         = "application"
  subnets                    = [for s in cloud_subnet.private : s.id]
  security_groups            = [cloud_security_group.web.id]
  enable_deletion_protection = true
  tags                       = local.common_tags
}

resource "cloud_dns_record" "api" {
  zone_id = "Z0SAMPLEZONEID01"
  name    = "api.orders.example.com"
  type    = "CNAME"
  ttl     = 300
  records = [cloud_lb.public.dns_name]
}

# __APPEND__

Somebody clicked in a console

Change reality without touching the configuration or the state file. This is what drift is, and it is the only thing on this site that has no equivalent anywhere else.

What the tool sees

Plan: 0 to add, 0 to change, 0 to destroy.