Batch account should use User Subscription pool allocation mode

Medium Azure General batchaccounts-batch-account-user-subscription

Applies to

Microsoft.Batch/batchAccounts

What CGPulse checks

A resource passes this rule when poolAllocationMode must equal UserSubscription. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Set pool allocation mode to User Subscription for better control over compute resources. In Azure Portal: Batch account > Properties > verify pool allocation mode. See: https://learn.microsoft.com/en-us/azure/batch/best-practices#pool-configuration-and-naming

CLI

az batch account show --ids "{id}" --query "poolAllocationMode" -o tsv

Bicep

// Pool allocation mode cannot be changed after creation

resource batch 'Microsoft.Batch/batchAccounts@2024-02-01' = {{
  name: '{name}'
  location: resourceGroup().location
  properties: {{
    poolAllocationMode: 'UserSubscription'
  }}
}}

Terraform

# Pool allocation mode is set at account creation and cannot be changed
resource "azurerm_batch_account" "{name}" {
  name                                = "{name}"
  resource_group_name                 = "{rg}"
  location                            = var.location
  pool_allocation_mode                = "UserSubscription"
  storage_account_id                  = "<storage-account-id>"
  storage_account_authentication_mode = "StorageKeys"
}

Compliance frameworks

Cloud Security BaselineIM-1

Vendor documentation

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