Difference between HTTP application routing add-on and web application routing add-on

Question

The HTTP application routing add-on (preview) for Azure Kubernetes Service (AKS) will be retired on 3 March 2025.

The HTTP application routing add-on is only supported up to Kubernetes version 1.22, which has already retired, according to the Azure Kubernetes Service support policy.

Required action

Transition your ingresses to use the web application routing add-on for a better experience. To avoid service disruptions, please follow our instructions to migrate to a replacement product before 3 March 2025.

We encourage you to transition your ingresses to the web application routing add-on prior to the retirement date. The web application routing add-on provides monitoring through Prometheus metrics, Azure DNS zone management, and SSL termination through certificates stored in Azure Key Vault.

can explain the difference between the Difference between HTTP application routing add-on and web application routing add-on

Answer 1

Hi,

The HTTP application routing add-on(preview) was the previous NGINX ingress-controller addon available for AKS. Once enabled, it created an nginx-ingress-controller with only 1 instance of it.
The application routing add-on is the newly available nginx-ingress-controller addon provided by Microsoft for AKS, and it deploys a nginx-ingress-controller as well.
There's no major differences here, but the http application routing addon got deprecated and therefore to continue having the support, it's recommended to migrate to the application routing:
https://learn.microsoft.com/en-us/azure/aks/app-routing-migration