Explore the Azure Resource Manager template parameters

  • 3 minutes

In the parameters section of the template, you specify which values you can input when deploying the resources. The available properties for a parameter are:

"parameters": {
    "<parameter-name>" : {
        "type" : "<type-of-parameter-value>",
        "defaultValue": "<default-value-of-parameter>",
        "allowedValues": [ "<array-of-allowed-values>" ],
        "minValue": <minimum-value-for-int>,
        "maxValue": <maximum-value-for-int>,
        "minLength": <minimum-length-for-string-or-array>,
        "maxLength": <maximum-length-for-string-or-array-parameters>,
        "metadata": {
        "description": "<description-of-the parameter>"
        }
    }
}

Here's an example that illustrates two parameters: one for a virtual machine's username, and one for its password:

"parameters": {
  "adminUsername": {
    "type": "string",
    "metadata": {
      "description": "Username for the Virtual Machine."
    }
  },
  "adminPassword": {
    "type": "securestring",
    "metadata": {
      "description": "Password for the Virtual Machine."
    }
  }
}

Note

You're limited to 256 parameters in a template. You can reduce the number of parameters by using objects that contain multiple properties.