# Managing Dns

Manage DNS records, TTL strategies, and DNS-as-code automation for infrastructure.

- Repository: https://github.com/ancoleman/ai-design-components (526 stars)
- Category: DevOps
- License: MIT
- Last updated: 2025-12-11
- Runs scripts: yes, review before use

## Install

Claude Code: `npx skills add ancoleman/ai-design-components --skill managing-dns -g -a claude-code -y`
Codex: `npx skills add ancoleman/ai-design-components --skill managing-dns -g -a codex -y`
Cursor: `npx skills add ancoleman/ai-design-components --skill managing-dns -g -a cursor -y`
Gemini CLI: `npx skills add ancoleman/ai-design-components --skill managing-dns -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add ancoleman/ai-design-components`

## Description

Manage DNS records, TTL strategies, and DNS-as-code automation for infrastructure. Use when configuring domain resolution, automating DNS from Kubernetes with external-dns, setting up DNS-based load balancing, or troubleshooting propagation issues across cloud providers (Route53, Cloud DNS, Azure DNS, Cloudflare).

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# DNS Management

Configure and automate DNS records with proper TTL strategies, DNS-as-code patterns, and troubleshooting techniques.

## Purpose

Guide DNS configuration for applications, infrastructure, and services with focus on:
- Record type selection (A, AAAA, CNAME, MX, TXT, SRV, CAA)
- TTL strategies for propagation and caching
- DNS-as-code automation (external-dns, OctoDNS, DNSControl)
- Cloud DNS services comparison and selection
- DNS-based load balancing patterns
- Troubleshooting tools and techniques

## When to Use This Skill

Apply DNS management patterns when:
- Setting up DNS for new applications or services
- Automating DNS updates from Kubernetes workloads
- Configuring DNS-based failover or load balancing
- Troubleshooting DNS propagation or resolution issues
- Migrating DNS between providers
- Planning DNS changes with minimal downtime
- Implementing GeoDNS for global users

## Record Type Selection

### Quick Reference

**Address Resolution:**
- **A Record**: Map hostname to IPv4 address (example.com → 192.0.2.1)
- **AAAA Record**: Map hostname to IPv6 address (example.com → 2001:db8::1)
- **CNAME Record**: Alias to another domain (www.example.com → example.com)
  - Cannot use at zone apex (@)
  - Cannot coexist with other records at same name

**Email Configuration:**
- **MX Record**: Direct email to mail servers with priority
- **TXT Record**: Email authentication (SPF, DKIM, DMARC) and verification

**Service Discovery:**
- **SRV Record**: Specify service location (protocol, priority, weight, port, target)

**Delegation and Security:**
- **NS Record**: Delegate subdomain to different nameservers
- **CAA Record**: Restrict which Certificate Authorities can issue certificates

**Cloud-Specific:**
- **ALIAS Record**: Like CNAME but works at zone apex (Route53, Cloudflare)

### Decision Tree

The rest: https://github.com/ancoleman/ai-design-components/blob/HEAD/skills/managing-dns/SKILL.md