copySampleWithLength.json

{
    "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "siteNames": {
            "type": "array"
        },
        "hostingPlanName": {
            "type": "string"
        },
        "siteLocation": {
            "type": "string"
        },
        "sku": {
            "type": "string",
            "defaultValue": "Free"
        },
        "workerSize": {
            "type": "string",
            "defaultValue": "0"
        }
    },
    "resources": [
        {
            "apiVersion": "2014-06-01",
            "name": "[parameters('hostingPlanName')]",
            "type": "Microsoft.Web/serverfarms",
            "location": "[parameters('siteLocation')]",
            "properties": {
                "name": "[parameters('hostingPlanName')]",
                "sku": "[parameters('sku')]",
                "workerSize": "[parameters('workerSize')]",
                "numberOfWorkers": 1
            }
        },
        {
            "copy": {
                "name": "websitescopy",
                "count": "[length(parameters('siteNames'))]"
            },
            "apiVersion": "2014-06-01",
            "name": "[parameters('siteNames')[copyIndex()]]",
            "type": "Microsoft.Web/sites",
            "location": "[parameters('siteLocation')]",
            "dependsOn": [
                "[concat('Microsoft.Web/serverfarms/', parameters('hostingPlanName'))]"
            ],
            "properties": {
                "name": "[parameters('siteNames')]",
                "serverFarm": "[parameters('hostingPlanName')]"
            }
        }
    ]
}