/azure-application-gateway

name: azure-application-gateway
description: Expert knowledge for Azure Application Gateway development including troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. Use when configuring App Gateway v2/Containers, WAF/TLS, AKS/AGIC ingress, Key Vault certs, or HTTP routing rules, and other Azure Application Gateway related development tasks. Not for Azure Load Balancer (use azure-load-balancer), Azure Front Door (use azure-front-door), Azure Virtual Network (use azure-virtual-network), Azure Web Application Firewall (use azure-web-application-firewall).
compatibility: Requires network access. Uses mcp_microsoftdocs:microsoft_docs_fetch or fetch_webpage to retrieve documentation.
metadata:
  generated_at: "2026-09-13"
  generator: "docs2skills/1.0.0"

Azure Application Gateway Skill

This skill provides expert guidance for Azure Application Gateway. Covers troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. It combines local quick-reference content with remote documentation fetching capabilities.

How to Use This Skill

> **IMPORTANT for Agent**: Use the **Category Index** below to locate relevant sections. For categories with line ranges (e.g., `L35-L120`), use `read_file` with the specified lines. For categories with file links (e.g., `[security.md](security.md)`), use `read_file` on the linked reference file

> **IMPORTANT for Agent**: If `metadata.generated_at` is more than 3 months old, suggest the user pull the latest version from the repository. If `mcp_microsoftdocs` tools are not available, suggest the user install it: [Installation Guide](https://github.com/MicrosoftDocs/mcp/blob/main/README.md)

This skill requires **network access** to fetch documentation content:

• **Preferred**: Use `mcp_microsoftdocs:microsoft_docs_fetch` with query string `from=learn-agent-skill`. Returns Markdown.
• **Fallback**: Use `fetch_webpage` with query string `from=learn-agent-skill&accept=text/markdown`. Returns Markdown.

Category Index

| Category | Lines | Description | |----------|-------|-------------| | Troubleshooting | L37-L43 | Diagnosing backend health and metrics, interpreting ALB Controller status, and troubleshooting common connectivity, routing, and configuration issues in Application Gateway for Containers. | | Best Practices | L44-L49 | Tuning health probes, understanding probe behavior, and planning Application Gateway capacity, scaling, and configuration for high-traffic workloads. | | Decision Making | L50-L60 | Guidance on choosing networking and pricing for Application Gateway for Containers and planning/migrating between AGIC, v1/v2 gateways, and classic vs ARM VMs. | | Architecture & Design Patterns | L61-L65 | Guidance on choosing and designing load-balancing strategies and traffic distribution patterns when using Azure Application Gateway for Containers. | | Limits & Quotas | L66-L71 | Configuring autoscaling, zone redundancy, and multi-site hosting limits for Application Gateway v2, including capacity, scaling behavior, and site/hostname constraints. | | Security | L72-L113 | Configuring TLS/SSL, certificates, mTLS, cipher suites, Key Vault, HSTS, WAF, and private access for securing Azure Application Gateway and Application Gateway for Containers. | | Configuration | L114-L176 | Configuring Application Gateway and Application Gateway for Containers: listeners, routing, probes, health, headers/URL rewrites, WebSockets, HTTP/3, mTLS, Private Link, monitoring, and AKS/Ingress integration. | | Integrations & Coding Patterns | L177-L186 | Patterns and scripts for integrating App Gateway with AKS, Key Vault, Prometheus/Grafana, Sentinel/Defender, HTTP header rewrites, request mirroring, and autoscaling pods via gateway metrics | | Deployment | L187-L199 | Deploying and scaling Application Gateway and AGIC: portal/ARM/PowerShell setup, IPv6 frontends, AKS add-on enable/disable, migrations, and Helm-based upgrades. |

Troubleshooting

| Topic | URL | |-------|-----| | Diagnose backend health states in Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-backend-health | | Use ALB Controller backend health and metrics for troubleshooting | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/alb-controller-backend-health-metrics | | Troubleshoot common issues in Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/troubleshooting-guide |

Best Practices

| Topic | URL | |-------|-----| | Health probe behavior and tuning for Azure Application Gateway | https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-probe-overview | | Plan Application Gateway for high traffic volume scenarios | https://learn.microsoft.com/en-us/azure/application-gateway/high-traffic-support |

Decision Making

| Topic | URL | |-------|-----| | Choose container networking for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/container-networking | | Decide and plan migration from AGIC to Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/migrate-from-agic-to-agc | | Estimate and understand pricing for Application Gateway for Containers | https://learn.microsoft.com/en-us/azure/application-gateway/for-containers/understanding-pricing | | Migrate Azure Application Gateway from V1 to V2 | https://learn.microsoft.com/en-us/azure/application-gateway/migrate-v1-v2 | | FAQ for Azure Application Gateway V1 retirement and migration | https://learn.microsoft.com/en-us/azure/application-gateway/retirement-faq | | Plan migration from Application Gateway V1 to V2 | https://learn.microsoft