cluster.json

{
  "properties": {
    "vmSize": "Standard_NC6",
    "vmPriority": "dedicated",
    "scaleSettings": {
      "autoScale": {
        "minimumNodeCount": "2",
        "maximumNodeCount": "2"
      }
    },
    "virtualMachineConfiguration": {
      "publisher": "Canonical",
      "offer": "UbuntuServer",
      "sku": "16.04.0-LTS"
    },
    "nodeSetup": {
      "mountVolumes": {
        "azureFileShares": [{
          "accountName": "<file share account name>",
          "azureFileUrl": "https://<file share account name>.file.core.windows.net/<file share name>",
          "credentials": {
            "accountKey": "<storage account key>"
          },
          "relativeMountPath": "external"
        }]
      }
    },
    "userAccountSettings": {
      "adminUserName": "<admin username>",
      "adminUserSshPublicKey": "<base64 encoded RSA key>",
      "adminUserPassword": "<password>"
    }
 }
}