Use valid registry names

November 27, 2025 ยท View on GitHub

SYNOPSIS

Container registry names should meet naming requirements.

DESCRIPTION

When naming Azure resources, resource names must meet service requirements. The requirements for container registry names are:

  • Between 5 and 50 characters long.
  • Alphanumerics.
  • Container registry names must be globally unique.

RECOMMENDATION

Consider using names that meet container registry naming requirements. Additionally consider naming resources with a standard naming convention.

EXAMPLES

Configure with Bicep

To deploy registries that pass this rule, consider:

  • Set the name property to a string that matches the naming requirements.
  • Optionally, consider constraining name parameters with minLength and maxLength attributes.

For example:

@minLength(5)
@maxLength(50)
@description('The name of the resource.')
param name string

@description('The location resources will be deployed.')
param location string = resourceGroup().location

resource registry 'Microsoft.ContainerRegistry/registries@2025-05-01-preview' = {
  name: name
  location: location
  sku: {
    name: 'Premium'
  }
  identity: {
    type: 'SystemAssigned'
  }
  properties: {
    adminUserEnabled: false
    anonymousPullEnabled: false
    publicNetworkAccess: 'Disabled'
    zoneRedundancy: 'Enabled'
    policies: {
      quarantinePolicy: {
        status: 'enabled'
      }
      retentionPolicy: {
        days: 30
        status: 'enabled'
      }
      softDeletePolicy: {
        retentionDays: 90
        status: 'enabled'
      }
      exportPolicy: {
        status: 'disabled'
      }
    }
  }
}

Configure with Azure template

To deploy registries that pass this rule, consider:

  • Set the name property to a string that matches the naming requirements.
  • Optionally, consider constraining name parameters with minLength and maxLength attributes.

For example:

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "name": {
      "type": "string",
      "minLength": 5,
      "maxLength": 50,
      "metadata": {
        "description": "The name of the resource."
      }
    },
    "location": {
      "type": "string",
      "defaultValue": "[resourceGroup().location]",
      "metadata": {
        "description": "The location resources will be deployed."
      }
    }
  },
  "resources": [
    {
      "type": "Microsoft.ContainerRegistry/registries",
      "apiVersion": "2025-05-01-preview",
      "name": "[parameters('name')]",
      "location": "[parameters('location')]",
      "sku": {
        "name": "Premium"
      },
      "identity": {
        "type": "SystemAssigned"
      },
      "properties": {
        "adminUserEnabled": false,
        "anonymousPullEnabled": false,
        "publicNetworkAccess": "Disabled",
        "zoneRedundancy": "Enabled",
        "policies": {
          "quarantinePolicy": {
            "status": "enabled"
          },
          "retentionPolicy": {
            "days": 30,
            "status": "enabled"
          },
          "softDeletePolicy": {
            "retentionDays": 90,
            "status": "enabled"
          },
          "exportPolicy": {
            "status": "disabled"
          }
        }
      }
    }
  ]
}

NOTES

This rule does not check if container registry names are unique.