Use the Azure PowerShell module to create and manage Azure resources. You can create or manage Azure resources from the PowerShell command line or in scripts. This guide describes using PowerShell to transfer files between local disk and Azure Blob storage.
We recommend that you use the Azure Az PowerShell module to interact with Azure. See Install Azure PowerShell to get started. To learn how to migrate to the Az PowerShell module, see Migrate Azure PowerShell from AzureRM to Az.
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This quickstart requires the Azure PowerShell module Az version 0.7 or later. Run Get-InstalledModule -Name Az -AllVersions | select Name,Version to find the version. If you need to install or upgrade, see Install Azure PowerShell module.
If you don't know which location you want to use, you can list the available locations. Display the list of locations by using the following code example and find the one you want to use. This example uses eastus. Store the location in a variable and use the variable so you can change it in one place.
Create a standard, general-purpose storage account with LRS replication by using New-AzStorageAccount. Next, get the storage account context that defines the storage account you want to use. When acting on a storage account, reference the context instead of repeatedly passing in the credentials. Use the following example to create a storage account called mystorageaccount with locally redundant storage (LRS) and blob encryption (enabled by default).
Blob storage supports block blobs, append blobs, and page blobs. VHD files that back IaaS VMs are page blobs. Use append blobs for logging, such as when you want to write to a file and then keep adding more information. Most files stored in Blob storage are block blobs.
To upload a file to a block blob, get a container reference, then get a reference to the block blob in that container. Once you have the blob reference, you can upload data to it by using Set-AzStorageBlobContent. This operation creates the blob if it doesn't exist, or overwrites the blob if it exists.
The AzCopy command-line utility offers high-performance, scriptable data transfer for Azure Storage. You can use AzCopy to transfer data to and from Blob storage and Azure Files. For more information about AzCopy v10, the latest version of AzCopy, see Get started with AzCopy. To learn about using AzCopy v10 with Blob storage, see Transfer data with AzCopy and Blob storage.
Remove all of the assets you've created. The easiest way to remove the assets is to delete the resource group. Removing the resource group also deletes all resources included within the group. In the following example, removing the resource group removes the storage account and the resource group itself.
Azure blob storage allows you to store large amounts of unstructured object data. You can use blob storage to gather or expose media, content, or application data to users. Because all blob data is stored within containers, you must create a storage container before you can begin to upload data. To learn more about blob storage, read the Introduction to Azure Blob storage.
You'll need to obtain authorization to an Azure subscription before you can use the examples in this article. Authorization can occur by authenticating with a Microsoft Entra account or using a shared key. The examples in this article use Microsoft Entra authentication in conjunction with context objects. Context objects encapsulate your Microsoft Entra credentials and pass them on subsequent data operations, eliminating the need to reauthenticate.
After the connection has been established, create the storage account context by calling the New-AzStorageContext cmdlet. Include the -UseConnectedAccount parameter so that data operations will be performed using your Microsoft Entra credentials.
To create containers with PowerShell, call the New-AzStorageContainer cmdlet. There are no limits to the number of blobs or containers that can be created within a storage account. Containers cannot be nested within other containers.
The following example illustrates three options for the creation of blob containers with the New-AzStorageContainer cmdlet. The first approach creates a single container, while the remaining two approaches leverage PowerShell operations to automate container creation.
To use this example, supply values for the variables and ensure that you've created a connection to your Azure subscription. Remember to replace the placeholder values in brackets with your own values.
Use the Get-AzStorageContainer cmdlet to retrieve storage containers. To retrieve a single container, include the -Name parameter. To return a list of containers that begins with a given character string, specify a value for the -Prefix parameter.
A container exposes both system properties and user-defined metadata. System properties exist on each blob storage resource. Some properties are read-only, while others can be read or set. Under the covers, some system properties map to certain standard HTTP headers.
User-defined metadata consists of one or more name-value pairs that you specify for a blob storage resource. You can use metadata to store additional values with the resource. Metadata values are for your own purposes only, and don't affect how the resource behaves.
Users that have many thousands of objects within their storage account can quickly locate specific containers based on their metadata. To access the metadata, you'll use the BlobContainerClient object. This object allows you to access and manipulate containers and their blobs. To update metadata, you'll need to call the SetMetadata() method. The method only accepts key-value pairs stored in a generic IDictionary object. For more information, see the BlobContainerClient class
The example below first updates a container's metadata and afterward retrieve a container's metadata. The example flushes the sample container from memory and retrieves it again to ensure that metadata isn't being read from the object in memory.
A shared access signature (SAS) provides delegated access to Azure resources. A SAS gives you granular control over how a client can access your data. For example, you can specify which resources are available to the client. You can also limit the types of operations that the client can perform, and specify the amount of time for which the actions can be taken.
A SAS is commonly used to provide temporary and secure access to a client who wouldn't normally have permissions. An example of this scenario would be a service that allows users read and write their own data to your storage account.
Azure Storage supports three types of shared access signatures: user delegation, service, and account SAS. For more information on shared access signatures, see the Create a service SAS for a container or blob article.
Any client that possesses a valid SAS can access data in your storage account as permitted by that SAS. It's important to protect a SAS from malicious or unintended use. Use discretion in distributing a SAS, and have a plan in place for revoking a compromised SAS.
The following example illustrates the process of configuring a service SAS for a specific container using the New-AzStorageContainerSASToken cmdlet. The example will configure the SAS with start and expiry times and a protocol. It will also specify the read, write, and list permissions in the SAS using the -Permission parameter. You can reference the full table of permissions in the Create a service SAS article.
The SAS token returned by Blob Storage doesn't include the delimiter character ('?') for the URL query string. If you are appending the SAS token to a resource URL, remember to also append the delimiter character.
Depending on your use case, you can delete a container or list of containers with the Remove-AzStorageContainer cmdlet. When deleting a list of containers, you can leverage conditional operations, loops, or the PowerShell pipeline as shown in the examples below.
In some cases, it's possible to retrieve containers that have been deleted. If your storage account's soft delete data protection option is enabled, the -IncludeDeleted parameter will return containers deleted within the associated retention period. The -IncludeDeleted parameter can only be used in conjunction with the -Prefix parameter when returning a list of containers. To learn more about soft delete, refer to the Soft delete for containers article.
As mentioned in the List containers section, you can configure the soft delete data protection option on your storage account. When enabled, it's possible to restore containers deleted within the associated retention period.
The following example explains how to restore a soft-deleted container with the Restore-AzStorageContainer cmdlet. Before you can follow this example, you'll need to enable soft delete and configure it on at least one of your storage accounts.
First, you need a storage account context. This is the same as in the previous post. To define a storage account context, you need the storage account name and key. Set the variables to storage account name and key. You can get these from the Storage Account in the Azure Portal.
What if you have a really large blob, like a VHD file, and you want to copy it from one storage account to another? Maybe you even want to copy it to a storage account in another region, so you can recreate the VM in that region?
In this post, we went over how to delete a blob and how to copy a blob to another blob. We also learned how to do an asynchronous copy of a large blob from one storage account to another, and check the status repeatedly until it was finished. In my next post, we will learn how to take a snapshot of a blob using PowerShell.
Hi Robin, would you mind throwing in an example on how to handle array values in a variable? For example, you have multiple storage accounts within a subscription. You fetch all the storage accounts based on the subscription and parse through each of those accounts to perform some operation on the blob container within. Thanks. 152ee80cbc
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