Azure Load Balancer Skill
This skill provides expert guidance for Azure Load Balancer. 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: This file may be large. Use the Category Index below to locate relevant sections, then use
read_filewith specific line ranges (e.g.,L136-L144) to read the sections needed for the user's question
IMPORTANT for Agent: If
metadata.generated_atis more than 3 months old, suggest the user pull the latest version from the repository. Ifmcp_microsoftdocstools are not available, suggest the user install it: Installation Guide
This skill requires network access to fetch documentation content:
- Preferred: Use
mcp_microsoftdocs:microsoft_docs_fetchwith query stringfrom=learn-agent-skill. Returns Markdown. - Fallback: Use
fetch_webpagewith query stringfrom=learn-agent-skill&accept=text/markdown. Returns Markdown.
Category Index
| Category | Lines | Description |
|---|---|---|
| Troubleshooting | L37-L52 | Diagnosing and fixing Azure Load Balancer issues: deployment errors, health events/logs, probes, connectivity/backend traffic, SNAT/timeouts, IMDS errors, and resource health/availability. |
| Best Practices | L53-L60 | Guidance on deploying Azure Load Balancer with VM scale sets, configuring inbound NAT, and building custom HTTP/HTTPS health probes (Python) using recommended best practices. |
| Decision Making | L61-L68 | Guidance on choosing the right Load Balancer SKU and planning/migrating configurations, including Basic→Standard, NAT rules v1→v2, and AWS NLB→Azure Load Balancer. |
| Architecture & Design Patterns | L69-L73 | Design patterns for outbound internet connectivity using Azure Load Balancer, including egress-only architectures and SNAT configuration, scaling, and best practices. |
| Limits & Quotas | L74-L79 | Configuring Azure Load Balancer TCP idle timeouts and reset options, and understanding how and when TCP resets are triggered and affect client connections. |
| Security | L80-L85 | Security guidance for Azure Load Balancer: hardening, access controls, and using Azure DDoS Protection to defend against volumetric and network attacks. |
| Configuration | L86-L106 | Configuring Azure Load Balancer behavior: backends/frontends (incl. cross-subscription, IP-based, outbound-only), rules, health probes, traffic distribution, monitoring, and SNAT outbound rules. |
| Integrations & Coding Patterns | L107-L114 | Using Azure IMDS and Monitor to programmatically query load balancer/VM IP metadata and retrieve load balancer metrics via CLI and REST APIs. |
| Deployment | L115-L119 | Guides for deploying Load Balancers: replicating configurations across regions and automating upgrades from Basic to Standard using PowerShell. |
Troubleshooting
Best Practices
| Topic | URL |
|---|---|
| Configure inbound NAT rules for VM scale sets | https://learn.microsoft.com/en-us/azure/load-balancer/configure-inbound-nat-rules-vm-scale-set |
| Implement custom HTTP/HTTPS health probes with Python | https://learn.microsoft.com/en-us/azure/load-balancer/create-custom-http-health-probe-howto |
| Apply Azure Load Balancer deployment best practices | https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-best-practices |
| Use Azure Standard Load Balancer with virtual machine scale sets | https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-standard-virtual-machine-scale-sets |
Decision Making
| Topic | URL |
|---|---|
| Plan and execute upgrade from Basic to Standard Load Balancer | https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-basic-upgrade-guidance |
| Migrate Azure Load Balancer NAT rules v1 to v2 | https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-nat-pool-migration |
| Plan AWS NLB to Azure Load Balancer migration | https://learn.microsoft.com/en-us/azure/load-balancer/network-load-balancing-aws-to-azure-how-to |
| Choose the right Azure Load Balancer SKU | https://learn.microsoft.com/en-us/azure/load-balancer/skus |
Architecture & Design Patterns
| Topic | URL |
|---|---|
| Design outbound internet connectivity with Azure Load Balancer SNAT | https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-outbound-connections |
Limits & Quotas
| Topic | URL |
|---|---|
| Configure Azure Load Balancer TCP idle timeout and reset | https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-tcp-idle-timeout |
| Understand Azure Load Balancer TCP reset behavior | https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-tcp-reset |
Security
| Topic | URL |
|---|---|
| Apply security best practices to Azure Load Balancer | https://learn.microsoft.com/en-us/azure/load-balancer/secure-load-balancer |
| Protect Azure Load Balancer with Azure DDoS Protection | https://learn.microsoft.com/en-us/azure/load-balancer/tutorial-protect-load-balancer-ddos |
Configuration
Integrations & Coding Patterns
| Topic | URL |
|---|---|
| Use Azure IMDS to retrieve load balancer metadata | https://learn.microsoft.com/en-us/azure/load-balancer/howto-load-balancer-imds |
| Query load balancer and VM IP info via Azure IMDS | https://learn.microsoft.com/en-us/azure/load-balancer/instance-metadata-service-load-balancer |
| Retrieve Azure Load Balancer metrics using Azure Monitor CLI | https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-monitor-metrics-cli |
| Query Azure Load Balancer metrics via REST API | https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-query-metrics-rest-api |
Deployment
| Topic | URL |
|---|---|
| Replicate Azure Load Balancer configuration across regions | https://learn.microsoft.com/en-us/azure/load-balancer/move-across-regions-azure-load-balancer |
| Automate Basic-to-Standard Load Balancer upgrade with PowerShell | https://learn.microsoft.com/en-us/azure/load-balancer/upgrade-basic-standard-with-powershell |