In one of my automation (Delete a Blob), I need to delete the previously stored reports (reports will always append with timestamp) on daily basis in Azure storage account in automated way in the specific container. So i need to ensure my container is available before start deleting my report. This article will have detail explain about How to Delete a Blob from an Azure Storage Account using PowerShell.

New to storage account?

One of the core services within Microsoft Azure is the Storage Account service. There are many service that utilize Storage Accounts for storing data, such as Virtual Machine Disks, Diagnostics logs (specially application log), SQL backups and others. You can also use the Azure Storage Account service to store your own data; such as blobs or binary data.

As per MSDN, 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.

Delete a Blob from an Azure Storage

Step: 1 Get the prerequisite inputs

As in this example i am going to delete the one the sql db (backup/imported to the storage) stored as bacpac format in the container called SQL…

## prerequisite Parameters
$resourceGroupName="rg-dgtl-strg-01"
$storageAccountName="sadgtlautomation01"
$storageContainerName="sql"
$blobName = "core_2022110824.bacpac"

Step: 2 Connect to your Azure subscription

Using the az login command with a service principal is a secure and efficient way to authenticate and connect to your Azure subscription for automation tasks and scripts. In scenarios where you need to automate Azure management tasks or run scripts in a non-interactive manner, you can authenticate using a service principal. A service principal is an identity created for your application or script to access Azure resources securely.

## Connect to your Azure subscription
az login --service-principal -u "210f8f7c-049c-e480-96b5-642d6362f464" -p "c82BQ~MTCrPr3Daz95Nks6LrWF32jXBAtXACccAV" --tenant "cf8ba223-a403-342b-ba39-c21f78831637"

Step: 3 Get the storage account to Check the container exit or not

When working with Azure Storage, you may need to verify if a container exists in a storage account or create it if it doesn’t. You can use the Get-AzStorageContainer cmdlet to check for the existence of a container.

## Get the storage account to check container exist or need to be create
$storageAccount = Get-AzStorageAccount -ResourceGroupName $resourceGroupName -Name $storageAccountName

## Get the storage account context
$context = $storageAccount.Context

Step: 4 Check the container exist before deleting the blob

We need to use Remove-AzStorageBlob cmdlet to delete a blob from the Azure storage container

## Check if the storage container exists
if(Get-AzStorageContainer -Name $storageContainerName -Context $context -ErrorAction SilentlyContinue)
{

Write-Host -ForegroundColor Green $storageContainerName ", the requested container exit,started deleting blob"

## Create a new Azure Storage container
Remove-AzStorageBlob -Container $storageContainerName -Context $context -Blob $blobName
Write-Host -ForegroundColor Green $blobName deleted

}
else
{
Write-Host -ForegroundColor Magenta $storageContainerName "the requested container does not exist"
}

Full Code:

## Delete a Blob from an Azure Storage
## Input Parameters
$resourceGroupName="rg-dgtl-strg-01"
$storageAccountName="sadgtlautomation01"
$storageContainerName="sql"
$blobName = "core_2022110824.bacpac"

## Connect to your Azure subscription
az login --service-principal -u "210f8f7c-049c-e480-96b5-642d6362f464" -p "c82BQ~MTCrPr3Daz95Nks6LrWF32jXBAtXACccAV" --tenant "cf8ba223-a403-342b-ba39-c21f78831637"

## Function to create the storage container
Function DeleteblogfromStorageContainer
{
## Get the storage account to check container exist or need to be create
$storageAccount = Get-AzStorageAccount -ResourceGroupName $resourceGroupName -Name $storageAccountName

## Get the storage account context
$context = $storageAccount.Context


## Check if the storage container exists
if(Get-AzStorageContainer -Name $storageContainerName -Context $context -ErrorAction SilentlyContinue)
{

Write-Host -ForegroundColor Green $storageContainerName ", the requested container exit,started deleting blob"
## Remove the blob in Azure Storage container
Remove-AzStorageBlob -Container $storageContainerName -Context $context -Blob $blobName

Write-Host -ForegroundColor Green $blobName deleted
}
else
{
Write-Host -ForegroundColor Magenta $storageContainerName "the requested container does not exist"
}

}
#Call the Function
DeleteblogfromStorageContainer

Output: