Containers cr

Container registry naming convention

The CAF abbreviation for Container registry is cr. Names can be 5 to 50 characters long and allow lowercase alphanumerics only. The name must be globally unique across all of Azure.

Naming rules

CAF abbreviation	cr
Length	5 to 50 characters
Allowed characters	Lowercase letters and numbers
Scope of uniqueness	Global (must be unique across all of Azure)
CAF pattern	cr{workload}{environment}{region}{instance}

Worth knowing: Globally unique name. Alphanumeric only, no hyphens. Azure treats the name case-insensitively and lowercases it for the login server URL.

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	`crpaymentsprodeus001`	20/50
Web app, development	`crwebappdevweu002`	17/50
Analytics with company prefix	`crcontosoanalyticsstageuks001`	29/50

Naming in Terraform and Bicep

Build the name from variables so one module produces the right name in every environment.

Terraform

locals {
  container_registry_name = lower("cr${var.workload}${var.environment}${var.region}001")
}

Bicep

var containerRegistryName = toLower('cr${workload}${environment}${region}001')

Generate Container registry names for your workload

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Related Containers resources

aks AKS cluster npsystem AKS system node pool np AKS user node pool ca Container app cae Container apps environment caj Container apps job ci Container instance sf Service Fabric cluster

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