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Chapter 39 - Terraform Dynamic Blocks

Repeatable nested blocks

Overview​

https://developer.hashicorp.com/terraform/language/expressions/dynamic-blocks

Demo - NSGs​

Git folder 60 - NSG's and security rules are a good example here

# Define Ports as a list in locals block
locals {
  ports = [22, 80, 8080, 8081, 7080, 7081]
}

# Create NSG here
resource "azurerm_network_security_group" "mynsg" {
  name                = "dupos-nsg-1"
  location            = azurerm_resource_group.myrg.location
  resource_group_name = azurerm_resource_group.myrg.name

  dynamic "security_rule" {
    for_each = local.ports 
    content {
      name                       = "inbound-rule-${security_rule.key}"
      description                = "Inbound Rule ${security_rule.key}"    
      priority                   = sum([100, security_rule.key])
      direction                  = "Inbound"
      access                     = "Allow"
      protocol                   = "Tcp"
      source_port_range          = "*"
      destination_port_range     = security_rule.value
      source_address_prefix      = "*"
      destination_address_prefix = "*"      
    }
  }