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Azure App Services on Azure Local

Azure App Services on Azure Local extends the platform-as-a-service (PaaS) experience to on-premises infrastructure. Organizations can host web applications, REST APIs, and background services using the same App Service programming model and deployment workflows used in Azure — while keeping application compute and data within their local environment.

Service Details​

What It Enables​

App Services on Azure Local runs on a Kubernetes cluster (AKS on Azure Local) with the App Service extension installed via Azure Arc. This provides a fully managed application hosting platform on-premises, with built-in scaling, deployment slots, and CI/CD integration.

Key Use Cases​

  • Internal line-of-business apps — Host corporate web applications on-premises with cloud-grade management and deployment automation
  • Data-sensitive APIs — Run APIs that process regulated or sensitive data without sending it to the cloud
  • Hybrid app modernization — Migrate legacy IIS/.NET workloads to the App Service model while keeping them on-premises during the transition
  • Edge-hosted applications — Deploy lightweight web frontends or API gateways at edge sites that serve local users or devices

Architecture​

  • App Service Kubernetes environment — An Arc-enabled AKS cluster with the App Service extension deployed
  • Control plane — Azure manages the App Service configuration; the Kubernetes extension handles local orchestration
  • Scaling — Built-in horizontal scaling within the AKS cluster resource limits
  • Networking — Applications are exposed via Kubernetes ingress on the local network; external access configurable through network infrastructure
  • Storage — Persistent storage backed by the AKS cluster's storage classes (S2D on Azure Local)

Supported Features​

  • .NET, Java, Node.js, PHP, Python, and custom container runtimes
  • Deployment slots for staged rollouts
  • CI/CD integration with GitHub Actions and Azure DevOps
  • Custom domains and TLS certificates
  • App settings and connection string management
  • Built-in authentication (Easy Auth)
  • Application Insights integration

Deployment Notes​

  • Requires AKS on Azure Local with the App Service extension installed via Azure Arc
  • Azure subscription required for the Arc-connected App Service environment
  • DNS and ingress configuration needed for application endpoints
  • Minimum cluster sizing depends on the number and resource requirements of hosted applications

Limitations​

  • Some cloud App Service features (e.g., Azure Functions Consumption plan, some managed integrations) are not available on-premises
  • Custom domains require manual DNS configuration on the local network
  • Auto-scaling is limited to the available compute capacity on the AKS cluster
  • Hardware and licensing requirements apply

External References​

Data verified with Microsoft Azure Local documentation, March 2026.