Configure an application gateway health probe - Azure Video Tutorial | LinkedIn Learning, formerly Lynda.com (2024)

FAQs

How do I create a health probe in Azure? ›

Create an application gateway. Create the application gateway using the tabs on the Create application gateway page. On the Azure portal menu or from the Home page, select Create a resource. Under Categories, select Networking and then select Application Gateway in the Popular Azure services list.

Application Gateway health probes (default and custom) continuously monitor all the backend servers in a pool to ensure the incoming traffic is sent only to the servers that are up and running.

An Azure Load Balancer health probe is a feature that detects the health status of your application instances. It sends a request to the instances to check if they are available and responding to requests. The health probe can be configured to use different protocols such as TCP, HTTP, or HTTPS.

You can configure the application gateway to have a public IP address, a private IP address, or both. A public IP is required when you host a back end that clients must access over the Internet via an Internet-facing virtual IP (VIP). For more information, see Application Gateway frontend IP address configuration.

Azure Application Gateway is a web traffic (OSI layer 7) load balancer that enables you to manage traffic to your web applications. Traditional load balancers operate at the transport layer (OSI layer 4 - TCP and UDP) and route traffic based on source IP address and port, to a destination IP address and port.

Azure Application Gateway can be used as an internal application load balancer or as an internet-facing application load balancer. An internet-facing application gateway uses public IP addresses. The DNS name of an internet-facing application gateway is publicly resolvable to its public IP address.

What is the IP address of Azure health probe? ›

Load Balancer health probes originate from the IP address 168.63. 129.16 and must not be blocked for probes to mark your instance as up.

The Health Probe pattern is about how an application can communicate its health state to Kubernetes. To be fully automatable, a cloud-native application must be highly observable by allowing its state to be inferred so that Kubernetes can detect whether the application is up and whether it is ready to serve requests.

If you're using Azure default DNS, check with your domain name registrar about whether proper A record or CNAME record mapping has been completed. If the domain is private or internal, try to resolve it from a VM in the same virtual network. If you can resolve it, restart Application Gateway and check again.

An application gateway is a dedicated deployment in your virtual network. Within your virtual network, a dedicated subnet is required for the application gateway. You can have multiple instances of a specific Application Gateway deployment in a subnet. You can also deploy other application gateways in the subnet.

To enable Health check, browse to the Azure portal and select your App Service app. Under Monitoring, select Health check. Select Enable and provide a valid URL path on your application, such as /health or /api/health . Select Save.

To create a container instance with the Azure CLI, provide a resource group name, container instance name, and Docker container image to the az container create command. In this quickstart, you use the public mcr.microsoft.com/azuredocs/aci-helloworld image. This image packages a small web app written in Node.