Compute and web stvm

VM storage account naming convention

The CAF abbreviation for VM storage account is stvm. Names can be 3 to 24 characters long and allow lowercase alphanumerics only. The name must be globally unique across all of Azure.

Naming rules

CAF abbreviation	stvm
Length	3 to 24 characters
Allowed characters	Lowercase letters and numbers
Scope of uniqueness	Global (must be unique across all of Azure)
CAF pattern	stvm{workload}{environment}{region}{instance}

Worth knowing: Globally unique name.

Rules follow Microsoft's resource naming rules and CAF abbreviations. Some resource types have extra start/end character restrictions, so verify against the official docs before locking in a convention.

Example names

Generated by the same engine as the name generator, so length and character rules are already applied.

Scenario	Generated name	Length
Payments API, production	`stvmpaymentsprodeus001`	22/24
Web app, development	`stvmwebappdevweu002`	19/24
Analytics with company prefix	`stvmanalyticsstageuks001` Dropped company to fit the 24-char limit.	24/24

Naming in Terraform and Bicep

Build the name from variables so one module produces the right name in every environment. The 24-character limit is enforced in the expression.

Terraform

locals {
  vm_storage_account_name = substr(lower("stvm${var.workload}${var.environment}${var.region}001"), 0, 24)
}

Bicep

var vmStorageAccountName = take(toLower('stvm${workload}${environment}${region}001'), 24)

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See the full list of Azure resource naming rules or read the complete CAF naming guide.