Using azure keyvault with monitoring

Question

Pulumi · Accepted Answer

Azure Key Vault is a cloud service that provides a secure store for secrets, such as keys, passwords, and certificates. It's often important to monitor the activity within your Key Vault to ensure that it's being used properly and securely. Azure Monitor is another service that can be used to collect and analyze telemetry data from various Azure services, including Key Vault.

In this program, we will create an instance of Azure Key Vault and configure monitoring for it using Azure Monitor. We will use `azure-native` provider's `KeyVault` for creating the Key Vault and `Monitor` for setting up the monitoring functionality.

First, we'll create the Key Vault. We need to provide a few details such as the location and the resource group where the Key Vault will reside. We'll also need to specify the properties of the Key Vault such as the SKU, which represents the pricing tier and performance level, and access policies that dictate who can access the Key Vault and what permissions they have.

Next, we'll set up monitoring for the Key Vault using Azure Monitor. Azure Monitor can collect logs and metrics from Key Vault which can be used for auditing and performance monitoring. It's highly advised to have monitoring enabled for your Key Vault to keep track of how and when it's accessed.

Let's create a Pulumi program in TypeScript to demonstrate this:

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as azure from "@pulumi/azure-native";

// Create a resource group for your KeyVault and other resources
const resourceGroup = new azure.resources.ResourceGroup("myResourceGroup", {
    resourceGroupName: "myKeyVaultResourceGroup",
    location: "East US", // specify the location you want to deploy in
});

// Create an instance of Azure Key Vault
const vault = new azure.keyvault.Vault("myVault", {
    resourceGroupName: resourceGroup.name,
    location: resourceGroup.location,
    properties: {
        tenantId: "your-tenant-id", // replace with your Azure tenant ID
        sku: {
            family: "A",
            name: "standard",
        },
        accessPolicies: [], // specify access policies here
    },
    tags: {
        "environment": "prod",
    },
});

// Set up an action group for alerts
const actionGroup = new azure.monitor.ActionGroup("myActionGroup", {
    resourceGroupName: resourceGroup.name,
    location: resourceGroup.location,
    enabled: true,
    groupShortName: "myAG",
    emailReceivers: [{
        emailAddress: "your-email@example.com", // replace with your email address for alerts
        name: "myEmailReceiver",
    }],
});

// Set up an alert rule to monitor the Key Vault
const alertRule = new azure.monitor.MetricAlert("myAlertRule", {
    resourceGroupName: resourceGroup.name,
    description: "Alert when there are too many accesses to the key vault.",
    enabled: true,
    scopes: [vault.id],
    criteria: {
        allOf: [{
            metricName: "TotalRequests",
            metricNamespace: "Microsoft.KeyVault/vaults",
            operator: "GreaterThan",
            threshold: 100,
            timeAggregation: "Count",
            statistic: "Total",
            dimensions: [],
        }],
    },
    actions: [{
        actionGroupId: actionGroup.id,
    }],
});

// Export the Key Vault's name and the Azure Monitor alert name
export const vaultName = vault.name;
export const alertRuleName = alertRule.name;
```

In this program:
- We created a resource group named `myResourceGroup` which will contain our Key Vault and monitoring setup.
- We then created the Key Vault with the name `myVault` and provided the necessary configuration including tenant ID, SKU, and access policies. Tags are added for organizational purposes.
- An action group named `myActionGroup` is created to send alerts to the specified email address.
- A metric alert named `myAlertRule` is set up to trigger when there are too many accesses to the Key Vault. It uses `TotalRequests` metric and sends an alert if the threshold is greater than 100.
- Finally, we exported the Vault's name and the alert rule name as stack outputs for easy reference.

To apply this Pulumi program, you need to have Pulumi installed and configured with access to your Azure account. Save the program in a `.ts` file, and run `pulumi up` to deploy the resources. Remember to replace placeholders like `your-tenant-id` and `your-email@example.com` with your actual Azure tenant ID and email address before running the program.

This implementation gives you a basic setup for a Key Vault and its monitoring. You can adjust the properties and criteria to match your specific needs and organizational policies.