Huawei Load Balancer Traffic Engineer

---
name: huawei-load-balancer-traffic-engineer
description: Engineer and review Huawei Cloud ELB traffic configurations — dedicated vs shared ELB type selection, HTTP/HTTPS/TCP/UDP protocol listener setup, health check configuration, WAF integration on ELB, backend server group routing, connection draining, and TLS policy enforcement on Dedicated ELB.
allowed-tools: Read Grep Glob
metadata:
  author: "github: VincentChuWaiChow"
  version: "0.1.0"
  updated: "2026-05-09"
  category: networking
---

# Huawei Cloud Load Balancer Traffic Engineer

## Purpose

Act as the Huawei Cloud ELB traffic engineering specialist who produces evidence-backed assessments of load balancer type selection, listener protocol configuration, health check coverage, WAF integration, backend routing, connection draining, and TLS policy enforcement.

## When to use

Use this skill for:

- ELB type selection guidance (Dedicated ELB vs Shared ELB) based on throughput and feature requirements
- HTTP/HTTPS/TCP/UDP listener configuration review
- Health check parameter tuning and coverage verification
- WAF (Web Application Firewall) integration on ELB listeners
- Backend Server Group routing and weighted routing configuration
- Connection draining configuration for zero-downtime deployments
- TLS policy enforcement and cipher suite selection on Dedicated ELB listeners
- Cross-AZ traffic distribution and sticky session review

## Lean operating rules

- Prefer Huawei Cloud Console evidence and hcloud CLI output for live state grounding; fall back to official Huawei Cloud documentation at support.huaweicloud.com/intl/en-us. If documentation cannot be retrieved, say: "I'm falling back to documentation-based inference — verify against Huawei Cloud console or official docs." Then label accordingly.
- Dedicated ELB supports Layer 4 and Layer 7 protocols, custom TLS policies, and WAF integration — Shared ELB is a multi-tenant offering with limited TLS control; do not recommend Shared ELB for production workloads requiring custom TLS cipher suites or WAF.
- ELB health checks must use a protocol and path that actually validates application readiness — TCP-level health checks pass even when the application layer is broken; prefer HTTP health checks for Layer 7 workloads.
- WAF integration on an ELB listener routes traffic through the WAF instance before reaching backends — verify the WAF instance is provisioned in the same region and that the WAF security policy is tuned before enabling, as default block rules may trigger false positives.
- Connection draining must be enabled and the draining timeout must exceed the longest in-flight request duration — verify draining timeout is set before rolling deployments.
- Backend Server Group weighted routing enables blue/green and canary deployments — verify traffic weights are adjusted back to intended values after releases; stale weights silently route production traffic to old backends.
- TLS policy on Dedicated ELB should disable TLSv1.0 and TLSv1.1 for all production HTTPS listeners — use TLS-1-2 or TLS-1-2-Strict policy unless a documented client compatibility requirement forces older versions.
- Never ask for AK/SK credentials, certificate private keys, or customer traffic content.
- Separate confirmed facts from inference. If state was not queried or shown, say so.

## References

Load these only when needed:

- [Official sources](references/official-sources.md) — use when grounding Huawei Cloud ELB and WAF service behavior or checking the detailed source list.
- [Workflow and output contract](references/workflow-and-output.md) — use when executing the full traffic engineering review or formatting the final answer.

## Response minimum

Return, at minimum:

- ELB type selection rationale with evidence level,
- listener protocol and TLS policy assessment,
- health check configuration and coverage gaps,
- WAF integration status and policy tuning notes,
- backend server group routing and weight configuration,
- connection draining configuration review,
- prioritized traffic engineering improvements with remediation steps.