To manage credentials Azure Databricks offers Secret Management. Secret Management allows users to share credentials in a secure mechanism. Currently Azure Databricks offers two types of Secret Scopes:
- Azure Key Vault-backed: To reference secrets stored in an Azure Key Vault, you can create a secret scope backed by Azure Key Vault. Azure Key Vault-backed secrets are only supported for Azure Databricks Premium Plan.
- Databricks-backed: A Databricks-backed scope is stored in (backed by) an Azure Databricks database. You create a Databricks-backed secret scope using the Databricks CLI (version 0.7.1 and above).
Creating Azure Key Vault
Open a Web Browser. I am using Chrome.
Enter the URL https://portal.azure.com and hit enter.
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Sign in into your Azure Account.
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After successfully logging to Azure Portal, you should see the following screen.
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Click on "All Services" on the top left corner.
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Search for "Azure Key Vault" in the "All Services" search text box.
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Click on "Key vaults". It will open the blade for "Key vaults".
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Click on "Add". It will open a new blade for creating a key vault "Create key vault".
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Enter all the information and click the "Create" button. Once the resource is created, refresh the screen and it will show the new "key vault" which we created.
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Click on the "key vault" name.
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Scroll down and click on the "Properties".
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Save the following information for the "key vault" created. We would be using these properties when we connect to the "key Vault" from "databricks"
- DNS Name
- Resource ID
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Creating Secret in Azure Key Vault
Click on "Secrets" on the left-hand side.
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Click on "Generate/Import". We will be creating a secret for the "access key" for the "Azure Blob Storage".
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Enter the required information for creating the "secret".
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After entering all the information click on the "Create" button.
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Note down the "Name" of the secret.
Creating Azure Key Vault Secret Scope in Databricks
Open a Web Browser. I am using Chrome.
Enter the URL https://portal.azure.com and hit enter.
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Sign in into your Azure Account.
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Open the Azure Databricks workspace created as part of the Azure Databricks Workspace mentioned in the Requirements section at the top of the article.
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Click on Launch Workspace to open Azure Databricks.
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Copy the "URL" from the browser window.
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Build the "URL" for creating the secret scope. https://<Databricks_url>#secrets/createScope.
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Enter all the required information:
- Scope Name.
- DNS Name (this is the "DNS name" which we saved when we created the "Azure Key Vault").
- Resource ID (this is the "Resource ID" which we saved when we created the "Azure Key Vault").
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Click the "Create" button.
"Databricks" is now connected with "Azure Key Vault".
Using Azure Key Vault Secret Scope and Secret in Azure Databricks Notebook
Open a Web Browser. I am using Chrome.
Enter the URL https://portal.azure.com and hit enter.
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Sign in into your Azure Account.
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Open the Azure Databricks workspace created as part of the "Azure Databricks Workspace" mentioned in the Requirements section at the top of the article.
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Click on "Launch Workspace" to open the "Azure Databricks".
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In the left pane, click Workspace. From the Workspace drop-down, click Create, and then click Notebook.
In the Create Notebook dialog box, enter a name, select Python as the language.
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Enter the following code in the Notebook
dbutils.secrets.get(scope = "azurekeyvault_secret_scope", key = "BlobStorageAccessKey") #azurekeyvault_secret_scope --> Azure Key Vault based scope which we created in Databricks #BlobStorageAccessKey --> Secret name which we created in Azure Key Vault
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When you run the above command, it should show [REDACTED] which confirms that the secret was used from the Azure Key Vault secrets.
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In the same notebook we are going to add another command section and use Scala as the language.
%scala val blob_storage_account_access_key = dbutils.secrets.get(scope = "azurekeyvault_secret_scope", key = "BlobStorageAccessKey") //azurekeyvault_secret_scope --> Azure Key Vault based scope which we created in Databricks //BlobStorageAccessKey --> Secret name which we created in Azure Key Vault
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When you run the above command, it should show [REDACTED] which confirms that the secret was used from the Azure Key Vault secrets.
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References
- https://docs.microsoft.com/en-us/azure/azure-databricks/what-is-azure-databricks
- https://azure.microsoft.com/en-us/pricing/details/key-vault/
- https://docs.microsoft.com/en-us/azure/azure-databricks/what-is-azure-databricks
- https://docs.azuredatabricks.net/user-guide/secrets/index.html#secrets-user-guide
- https://docs.azuredatabricks.net/user-guide/secrets/secret-scopes.html
- https://docs.azuredatabricks.net/user-guide/secrets/secret-scopes.html#create-an-azure-key-vault-backed-secret-scope
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