Microsoft AZ-400 Practice Test - Questions Answers, Page 44

To ensure that your Azure Web App named az400-38443478-main can retrieve secrets from an Azure Key Vault named az400-3844J478-kv1 using a system managed identity with the principle of least privilege, follow these detailed steps:

Enable a System Managed Identity for the Azure Web App:

Navigate to the Azure Portal.

Go to the Azure Web App az400-38443478-main.

Select Identity under the Settings section.

In the System assigned tab, switch the Status to On.

Click Save to apply the changes.

Grant the Web App Access to the Key Vault:

Go to the Azure Key Vault az400-3844J478-kv1.

Select Access policies under the Settings section.

Click on Add Access Policy.

Choose Secret permissions and select Get and List. This grants the app the ability to read secrets, adhering to the principle of least privilege.

Click on Select principal, search for your Web App name az400-38443478-main, and select it.

Click Add to add the policy.

Don't forget to click Save to save the access policy changes.

Retrieve Secrets in the Web App Code:

In your Web App's code, use the Azure SDK to retrieve the secrets.

For example, in a .NET application, you can use the Azure.Identity and Azure.Security.KeyVault.Secrets namespaces.

Utilize the DefaultAzureCredential class which will automatically use the system managed identity when running on Azure.

using Azure.Identity;

using Azure.Security.KeyVault.Secrets;

var client = new SecretClient(new Uri('https://az400-3844J478-kv1.vault.azure.net/'), new DefaultAzureCredential());

KeyVaultSecret secret = await client.GetSecretAsync('my-secret-name');

string secretValue = secret.Value;

Replace 'my-secret-name' with the actual name of the secret you want to retrieve.

By following these steps, your Azure Web App will be able to securely retrieve secrets from the Azure Key Vault using a system managed identity, without needing to store credentials in the code, and adhering to the principle of least privilege. Remember to replace the placeholder names with the actual names of your Web App and Key Vault.

To create an instance of Azure Application Insights named az400-38443478-main and configure it to receive telemetry data from an Azure web app with the same name, you'll need to follow these steps:

Create a Log Analytics Workspace:

Go to the Azure Portal.

Search for Log Analytics Workspaces and select Add.

Select a Subscription and either use an existing Resource Group or create a new one.

Provide a unique name for your Log Analytics workspace.

Choose the Region that is appropriate for you.

Review the settings and then select Create1.

Create an Azure Application Insights Instance:

In the Azure Portal, navigate to Application Insights.

Click on + Create.

Fill in the instance details, ensuring the name is az400-38443478-main.

Link the instance to the Log Analytics workspace you created in the previous step.

Review and create the Application Insights instance2.

Configure the Azure Web App to Send Telemetry Data:

Go to the Azure Web App az400-38443478-main.

Under Monitoring, select Application Insights.

Choose to use an existing resource and select the Application Insights instance you created.

Follow the prompts to set up the connection, which may involve adding the appropriate SDK to your web app and configuring the connection string or instrumentation key.

Verify Telemetry Data Reception:

After setting up, send some test traffic to your web app.

Then, go to the Application Insights instance and check the Overview or Performance sections to see if telemetry data is being received.

Remember to replace placeholder names with the actual names of your resources where necessary. These steps will help you set up Azure Application Insights to monitor your web app effectively.

To ensure that your Azure Web App named az400-38443478-main supports rolling upgrades and only 10 percent of users connect to the updated version of the app, you can use deployment slots with the following steps:

Create a Deployment Slot:

Navigate to the Azure Portal.

Go to your Web App az400-38443478-main.

Select Deployment slots in the menu.

Click on Add Slot.

Name the slot (e.g., staging) and if needed, clone settings from the production slot.

Configure the Traffic Percentage:

In the Deployment Slots menu, you will see a column for Traffic %.

Set the traffic percentage to 10% for the staging slot1.

This will route only 10% of the traffic to the updated version of the app in the staging slot.

Deploy the Updated App to the Staging Slot:

Deploy your updated application to the staging slot.

Test the application in the staging slot to ensure it's working as expected.

Complete the Rolling Upgrade:

Once you're satisfied with the performance and stability of the app in the staging slot, you can gradually increase the percentage of traffic until you're ready to swap with the production slot.

To swap slots, go to the Deployment slots menu and click on Swap with the production slot.

By using deployment slots, you can achieve rolling upgrades with minimal administrative effort, as it allows you to test the new version on a subset of users before fully releasing it. Remember to adjust the traffic percentage and monitor the application's performance throughout the process.

To configure a virtual machine template in your DevTest Labs environment named az400-38443478-dtl1 with Windows Server 2016 Datacenter that includes the Selenium tool and the Google Chrome browser, follow these steps:

Create a Custom Image with Windows Server 2016 Datacenter:

In the Azure Portal, go to your DevTest Lab az400-38443478-dtl1.

Navigate to Configuration and policies > Custom images.

Use an existing VM or create a new one with Windows Server 2016 Datacenter.

After setting up the VM, capture it to create a custom image1.

Install Selenium and Google Chrome on the VM:

Connect to the VM via RDP.

Download and install the Selenium WebDriver for your preferred programming language from the official Selenium website2.

For Google Chrome, download the offline installer from the official website and install it on the VM3.

Generalize the VM:

Run the sysprep command to generalize the VM, which prepares it to be used as a template.

Shut down the VM after sysprep completes.

Capture the Generalized VM to Create a Template:

In the Azure Portal, navigate to the VM and select Capture.

Provide the required details and create the image.

Add Selenium and Google Chrome Artifacts to the Template:

Go back to the DevTest Lab az400-38443478-dtl1.

Select Artifacts and add Selenium and Google Chrome artifacts to the template.

Ensure these artifacts are configured to install during the VM creation process.

Create VMs from the Template:

Now, when you create a new VM in the DevTest Lab, select the custom image you created.

The VM will be provisioned with Windows Server 2016 Datacenter, and the Selenium tool and Google Chrome browser will be installed automatically.

By following these steps, you can ensure that all virtual machines created from this template in your DevTest Lab will have the required operating system, tools, and browser installed. Remember to replace placeholder names with the actual names of your resources where necessary.

To store signed images in an Azure Container Registry (ACR) instance and support your planned images while minimizing costs, you need to modify the SKU of your ACR instance to one that supports content trust and image signing. Here's how you can do it:

Determine the Appropriate SKU:

Content trust and image signing are features of the Premium service tier of Azure Container Registry1.

If cost minimization is a priority, ensure that the Premium tier is necessary for your use case. If you require content trust, the Premium tier is the appropriate choice.

Modify the SKU of the ACR Instance:

Navigate to the Azure Portal.

Go to your ACR instance az40038443478act1.

Select Update from the overview pane.

Choose the Premium SKU from the SKU drop-down menu2.

Review the changes and pricing, then save the configuration.

By upgrading to the Premium SKU, you'll be able to store signed images in your ACR instance. Remember to monitor your usage and costs to ensure they align with your budget and requirements.