Azure App Gateway Overview and Deployment Steps

Azure App Gateway is a highly available, scalable, and secure entry point for your web applications. It provides a single entry point for your users to access your applications.

By using Azure App Gateway, you can offload SSL termination, load balancing, and SSL encryption, which can improve the performance and security of your applications.

Azure App Gateway supports multiple protocols, including HTTP and HTTPS, and can be used with various Azure services, such as Azure Web Apps and Azure Kubernetes Service (AKS).

On the Configuration tab of your Azure App Gateway, you'll connect the frontend and backend pool you created using a routing rule. This involves selecting the Add a rule option in the Routing rules column.

You'll need to enter a Rule name, such as myRoutingRule, and type a priority number. A routing rule requires a listener, so you'll need to enter values for the listener on the Listener tab.

The listener is crucial as it determines how the routing rule behaves. On the Backend targets tab, select myBackendPool for the Backend target.

You can also create a new Backend setting by selecting Add new and entering a name, such as myBackendSetting. The default values for the other settings will be accepted.

To save the routing rule, select Add on the Add a routing rule window. You'll then be returned to the Configuration tab, where you can select Next: Tags and then Next: Review + create.

Here's a summary of the configuration parameters:

Monitoring and Troubleshooting is crucial for ensuring the smooth operation of your Azure App Gateway. You can validate logs to verify application gateway issues.

To troubleshoot common issues, you can refer to Microsoft docs for steps to verify application gateway. This is a simple yet effective way to identify and resolve problems.

If you're experiencing issues with your App Gateway, you can check the CPU utilization to see if it's within acceptable limits. The current CPU utilization of the Application Gateway is displayed in the azure.network_applicationgateways.cpu_utilization metric, which is only available for V1 SKU.

You can also monitor the number of failed requests and response status returned by the Application Gateway using the azure.network_applicationgateways.failed_requests and azure.network_applicationgateways.response_status metrics.

Here are some key metrics to monitor for troubleshooting:

By monitoring these metrics, you can quickly identify and troubleshoot issues with your Azure App Gateway.

Monitoring and troubleshooting your Azure Application Gateway is crucial to ensure it's running smoothly and efficiently. You can monitor various parameters, including CPU utilization, current connections, and failed requests.

Availability and Performance tabs provide a brief detail of the Azure Application Gateway under the given subscription. The Overview, Frontend, Backend, and Configuration tabs give a detailed view of the metrics monitored in Azure Application Gateway Monitoring.

Metrics are a vital part of monitoring and troubleshooting your Azure Application Gateway. Azure Application Gateway Monitoring provides a range of metrics to help you understand its performance and behavior.

The metrics monitored in Azure Application Gateway Monitoring include CPU utilization, current connections, failed requests, response status, throughput, total requests, healthy and unhealthy host counts, and more. Here are some key metrics to keep an eye on:

Monitoring these metrics will help you identify potential issues and troubleshoot your Azure Application Gateway.

When you're faced with a problem, it's essential to validate logs are flowing for the Application Gateway.

Validate logs are flowing for the Application Gateway. Refer below steps from Microsoft docs to verify application gateway.

To start troubleshooting, you need to check if logs are actually flowing, and if not, you can refer to Microsoft docs for guidance on verifying the Application Gateway.

You can create an application gateway with a Web Application Firewall (WAF) to protect your Azure App Gateway.

An application gateway with a WAF provides a higher level of security for your web applications, by filtering out malicious traffic and blocking known vulnerabilities.

You can also enable WAF on your application gateway to detect and prevent common web attacks.

WAF counters track the total number of requests served by the WAF engine between poll intervals.

Some common WAF counters include WAF Total Requests, WAF Custom Rule Matches, and WAF Managed Rule Matches.

Here are some key WAF counters and their descriptions:

WAF also provides protection against bot traffic, with counters for WAF Bot Protection Matches and WAF Blocked Requests Rule Distribution.

To create the virtual network, public IP address, and application gateway, navigate to the Review + create tab and review the settings.

Select Create to initiate the deployment, which may take several minutes to complete. Wait until the deployment finishes successfully before moving on to the next section.

Resources will be successfully created, as indicated by the following deployment status: Microsoft.Resources/deployments: OKMicrosoft.Network/applicationGateways: OKMicrosoft.Network/publicIPAddresses: OK

To review and create an application gateway in Azure, start by navigating to the Review + create tab. Review the settings carefully before moving forward.

It may take several minutes for Azure to create the application gateway, so be patient and wait for the deployment to finish successfully.

Once the deployment is complete, you'll see a list of resources that have been successfully created. Here are the resources you can expect to see:

After creating the application gateway, you can move on to the next section of the setup process. Remember to select Create on the Review + create tab to initiate the creation of the virtual network, public IP address, and application gateway.

The return on investment for setting up Azure Application Gateway is a crucial aspect to consider.

The return on investment for setting up Azure Application Gateway is a crucial aspect to consider.

Azure Application Gateway logs provide essential information for analyzing access patterns and security events.

Access logs, collected every 60 seconds, contain one record per instance of Application Gateway and include caller's IP, requested URL, response latency, return code, and bytes in and out.

Firewall logs are also collected every 60 seconds and can be used to view requests that are logged through either detection or prevention mode of an application gateway that is configured with the web application firewall.

Here's a summary of the supported log categories: