Calculate the size of a Blob storage container

This script calculates the size of a container in Azure Blob storage by totaling the size of the blobs in the container.

If you don't have an Azure trail subscription, create a trial subscription before you begin.

Prerequisites

If you prefer to run CLI reference commands locally, install the Azure CLI. If you're running on Windows or macOS, consider running Azure CLI in a Docker container. For more information, see How to run the Azure CLI in a Docker container.

• If you're using a local installation, sign in to the Azure CLI by using the az login command. To finish the authentication process, follow the steps displayed in your terminal. For other sign-in options, see Sign in with the Azure CLI.

• When you're prompted, install the Azure CLI extension on first use. For more information about extensions, see Use extensions with the Azure CLI.

• Run az version to find the version and dependent libraries that are installed. To upgrade to the latest version, run az upgrade.

Sample script

Sign in to Azure

Use the following script to sign in using a different subscription, replacing <Subscription ID> with your Azure Subscription ID. If you don't have an Azure trail subscription, create a trial subscription before you begin.

az cloud set -n AzureChinaCloud
az login

subscription="<subscriptionId>" # add subscription here

az account set -s $subscription # ...or use 'az login'

For more information, see set active subscription or log in.

Run the script

# Calculate container size

# Variables for storage
let "randomIdentifier=$RANDOM*$RANDOM"
location="China East 2"
resourceGroup="msdocs-azuresql-rg-$randomIdentifier"
tag="calculate container size"
storage="msdocsstorage$randomIdentifier"
container="msdocs-storage-container-$randomIdentifier"

# Create a resource group
echo "Creating $resourceGroup in $location..."
az group create --name $resourceGroup --location "$location" --tag $tag

# Create storage account
echo "Creating $storage..."
az storage account create --name $storage --resource-group $resourceGroup --location "$location" --sku Standard_LRS

# Create a container
echo "Creating $container on $storage..."
key=$(az storage account keys list --account-name $storage --resource-group $resourceGroup -o json --query [0].value | tr -d '"')

az storage container create --name $container --account-key $key --account-name $storage #--public-access container

# Create sample files to upload as blobs
for i in `seq 1 3`; do
    echo $randomIdentifier > container_size_sample_file_$i.txt
done

# Upload sample files to container
az storage blob upload-batch \
    --pattern "container_size_sample_file_*.txt" \
    --source . \
    --destination $container \
    --account-key $key \
    --account-name $storage

# Calculate total size of container. Use the --query parameter to display only
# blob contentLength and output it in TSV format so only the values are
# returned. Then pipe the results to the paste and bc utilities to total the
# size of the blobs in the container.
bytes=`az storage blob list \
    --container-name $container \
    --account-key $key \
    --account-name $storage \
    --query "[*].[properties.contentLength]" \
    --output tsv | paste -s -d+ | bc`

# Display total bytes
echo "Total bytes in container: $bytes"

# Delete the sample files created by this script
rm container_size_sample_file_*.txt

Clean up resources

Use the following command to remove the resource group and all resources associated with it using the az group delete command - unless you have an ongoing need for these resources. Some of these resources may take a while to create, as well as to delete.

az group delete --name $resourceGroup

Sample reference

This script uses the following commands to calculate the size of the Blob storage container. Each item in the table links to command-specific documentation.

Next steps

For more information on the Azure CLI, see Azure CLI documentation.

Additional storage CLI script samples can be found in the Azure CLI samples for Azure Blob storage.