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---
page_type: sample
languages:
- csharp
products:
- azure
- azure-netapp-files
description: "This project demonstrates how to create a Snapshot Policy for Microsoft.NetApp resource provider using .NETCore SDK.
---

Azure NetAppFiles SDK Sample - Snapshot Policy for .NETCore

This project demonstrates how to use a Java sample application to create a Snapshot Policy for the Microsoft.NetApp resource provider.

In this sample application we perform the following operations:

• Creations
  • NetApp Files Account
  • Snapshot Policy
  • Capacity Pool
  • Volume
• Updates
  • Snapshot Policy
• Deletions
  • Volume
  • Snapshot Policy
  • Capacity Pool
  • Account

Note: The cleanup execution is disabled by default. If you want to run this end to end with the cleanup, please change value of boolean variable 'shouldCleanup' in program.cs

If you don't already have a Microsoft Azure subscription, you can get a FREE trial account here.

Prerequisites

1. Azure Subscription
2. Subscription needs to be enabled for Azure NetApp Files. For more information, please refer to this document.
3. Resource Group created
4. Virtual Network with a delegated subnet to Microsoft.Netapp/volumes resource. For more information, please refer to Guidelines for Azure NetApp Files network planning
5. For this sample console appplication work, we are using service principal based authenticate, follow these steps in order to setup authentication:

   1. Within an Azure Cloud Shell session, make sure you're logged on at the subscription where you want to be associated with the service principal by default:

      az account show

      If this is not the correct subscription, use

      az account set -s <subscription name or id>  

   2. Create a service principal using Azure CLI

      az ad sp create-for-rbac --sdk-auth

      Note: this command will automatically assign RBAC contributor role to the service principal at subscription level, you can narrow down the scope to the specific resource group where your tests will create the resources.

   3. Copy the output content and paste it in a file called azureauth.json, secure it with file system permissions and save it outside the tree related of your local git repo folder so the file doesn't get commited.

   4. Set an environment variable pointing to the file path you just created, here is an example with Powershell and bash: Powershell

      [Environment]::SetEnvironmentVariable("AZURE_AUTH_LOCATION", "C:\sdksample\azureauth.json", "User")

      Bash

      export AZURE_AUTH_LOCATION=/sdksamples/azureauth.json

      Note: for more information on service principal authentication with dotnet, please refer to Authenticate with the Azure Libraries for .NET

What is netappfiles-dontnetcore-snapshot-policy-sdk-sample doing?

This sample is dedicated to demonstrate how to create a Snapshot Policy using an ANF Account name in Azure NetApp Files. Similar to other ANF SDK examples, the authentication method is based on a service principal. This project will first create an ANF Account and then a Snapshot Policy that is tied to that Account. Afterwards it will create a Capacity Pool within the Account and finally a single Volume that uses the newly created Snapshot Policy.

There is a section in the code dedicated to remove created resources. By default this script will not remove all created resources; this behavior is controlled by a boolean variable called 'shouldCleanup' in the program.cs class. If you want to erase all resources right after the creation operations, set this variable to 'true'. If any of the earlier operations fail for any reason, the cleanup of resources will have to be done manually.

A Snapshot Policy uses schedules to create snapshots of Volumes that can be hourly, daily, weekly, monthly. The Snapshot Policy will also determine how many snapshots to keep. The sample will create a Snapshot Policy with all schedules and then update a single schedule within the policy, changing the value of the schedule's snapshots to keep.

How the project is structured

The following table describes all files within this solution:

Folder	FileName	Description
Root	program.cs	Authenticates and executes all operations
Root	Creation.cs	Performs the creation operations of resources
Root	Deletion.cs	Performs the delete operations of the created resources
Root	Update.cs	Performs update operations on created resources
Root\Common	ResourceUriUtils.cs	Static class that exposes some methods that helps parsing Uris, building a new Uris or getting a resource name from Uri for example
Root\Common	ServicePrincipalAuth.cs	Small static class used when working with Service Principal based authentication
Root\Common	Utils.cs	Static class that exposes a few methods that helps on various tasks, like writting a log to the console for example.
Root\Model	AzureAuthInfo.cs	Class that defines an Azure AD Service Principal authentication file

How to run the console application

1. Clone it locally

   git clone https://github.com/Azure-Samples/netappfiles-dotnetcore-dual-protocol-sdk-sample.git

2. Make sure you change the variables located at netappfiles-dotnetcore-dual-protocol-sdk-sample\src\anf-dotnetcore-dual-protocol-sdk-sample\program.cs at RunAsync method.
3. Change folder to netappfiles-dotnetcore-dual-protocol-sdk-sample\src\anf-dotnetcore-dual-protocol-sdk-sample
4. Since we're using service principal authentication flow, make sure you have the azureauth.json and its environment variable with the path to it defined (as previously described)
5. Build the console application

   dotnet build

6. Run the console application

   dotnet run

Sample output

References

• Azure NetAppFiles SDK Sample for .NETCore - More advanced example
• Authenticate with the Azure Libraries for .NET
• Resource limits for Azure NetApp Files
• Azure Cloud Shell
• Azure NetApp Files documentation
• Download Azure SDKs