Documentation
Chapter 97: Documentation Standards
Section titled “Chapter 97: Documentation Standards”Overview
Section titled “Overview”Comprehensive documentation is the backbone of operational excellence in DevOps and SRE practices. Good documentation enables teams to troubleshoot quickly, onboard new members efficiently, maintain consistency, and preserve institutional knowledge. This chapter covers documentation types, tools, standards, templates, and best practices for creating and maintaining technical documentation in production environments.
97.1 Types of Documentation
Section titled “97.1 Types of Documentation”Documentation Types
Section titled “Documentation Types”┌─────────────────────────────────────────────────────────────────────────┐│ DOCUMENTATION TYPES │├─────────────────────────────────────────────────────────────────────────┤│ ││ ┌─────────────────────────────────────────────────────────────────┐ ││ │ TECHNICAL DOCUMENTATION │ ││ ├─────────────────────────────────────────────────────────────────┤ ││ │ │ ││ │ ┌──────────────────┐ ┌──────────────────┐ │ ││ │ │ Architecture │ │ Runbooks │ │ ││ │ │ Docs │ │ │ │ ││ │ ├──────────────────┤ ├──────────────────┤ │ ││ │ │ System design │ │ Operations │ │ ││ │ │ Network topology │ │ procedures │ │ ││ │ │ Data flows │ │ Troubleshooting │ │ ││ │ │ Dependencies │ │ Emergency │ │ ││ │ │ Components │ │ response │ │ ││ │ └──────────────────┘ └──────────────────┘ │ ││ │ │ ││ │ ┌──────────────────┐ ┌──────────────────┐ │ ││ │ │ Post-mortems │ │ API Docs │ │ ││ │ │ │ │ │ │ ││ │ ├──────────────────┤ ├──────────────────┤ │ ││ │ │ Incident reports │ │ Endpoints │ │ ││ │ │ Root cause │ │ Authentication │ │ ││ │ │ analysis │ │ Examples │ │ ││ │ │ Lessons learned │ │ Error codes │ │ ││ │ │ Action items │ │ Rate limits │ │ ││ │ └──────────────────┘ └──────────────────┘ │ ││ │ │ ││ └─────────────────────────────────────────────────────────────────┘ ││ ││ Documentation Hierarchy: ││ ┌─────────────────────────────────────────────────────────────────┐ ││ │ │ ││ │ Strategy (Why) → High-level goals, decisions │ ││ │ │ ││ │ Architecture (What) → System design, components │ ││ │ │ ││ │ Operations (How) → Procedures, runbooks │ ││ │ │ ││ │ Reference (Info) → APIs, configs, code │ ││ │ │ ││ └─────────────────────────────────────────────────────────────────┘ ││ │└─────────────────────────────────────────────────────────────────────────┘97.2 Documentation Tools
Section titled “97.2 Documentation Tools”Tool Categories
Section titled “Tool Categories”# ============================================================# DOCUMENTATION TOOLS# ============================================================
# Static Site Generators- Hugo # Fast, Go-based- Gatsby # React-based, GraphQL- Jekyll # Ruby, GitHub Pages native- Docusaurus # React, documentation-focused- MkDocs # Markdown-based, Python
# Wiki Platforms- Confluence # Enterprise, Atlassian- Notion # All-in-one workspace- Bookstack # Open source, self-hosted- Wiki.js # Modern, Node.js
# Diagram Tools- PlantUML # Text-based diagrams- Mermaid # Markdown diagrams- Draw.io # GUI-based- Excalidraw # Hand-drawn style
# Code Documentation- Javadoc # Java- Sphinx # Python- Doxygen # Multi-language- ESDoc # JavaScript/TypeScript
# Version Control- GitHub # Markdown, Git-based- GitLab # GitLab Pages- AWS CodeCommit # AWS native97.3 Runbook Template
Section titled “97.3 Runbook Template”Comprehensive Runbook Structure
Section titled “Comprehensive Runbook Structure”# Service Runbook: [Service Name]
## Metadata- **Owner**: [Team Name] <team@company.com>- **Slack Channel**: #team-support- **On-Call**: PagerDuty [link]- **Tier**: [1/2/3]
## Service Description[Brief description of what this service does]
## Architecture[Link to architecture diagram]
## Dependencies| Service | Type | Critical ||---------|------|----------|| Database | PostgreSQL | Yes || Cache | Redis | No || API | REST | Yes |
## Monitoring### Dashboards- [Grafana Dashboard](link)- [Datadog Dashboard](link)
### Alerts| Alert | Threshold | Action ||-------|-----------|--------|| High Error Rate | > 5% | Check logs || High Latency | p99 > 2s | Check traces || Memory | > 80% | Scale or investigate |
## Endpoints| Path | Description ||------|-------------|| /health | Health check || /metrics | Prometheus metrics |
## Deployment
### Prerequisites- [ ] Access to CI/CD- [ ] Deployment approval
### Steps1. Merge to main branch2. Wait for CI pipeline3. Verify deployment in staging4. Deploy to production5. Check health endpoints6. Verify monitoring
### Rollback```bash# Quick rollback command./deploy.sh rollback --service=myappOr use CI/CD dashboard to redeploy previous version.
Common Issues
Section titled “Common Issues”| Symptom | Likely Cause | Resolution |
|---|---|---|
| 502 errors | Backend down | Check pods |
| High latency | Database query | Check slow logs |
| OOM crashes | Memory leak | Restart service |
Emergency Contacts
Section titled “Emergency Contacts”---
## 97.4 Architecture Documentation
### Example Template
```markdown# System Architecture: [System Name]
## Overview[Brief high-level description]
## Goals- [Goal 1]- [Goal 2]
## Non-Goals- [What we're NOT solving]
## Architecture Diagram[Insert Mermaid/PlantUML diagram]
## Components
### Component A- **Purpose**: [What it does]- **Technology**: [Stack]- **Scaling**: [Horizontal/Vertical]- **Data**: [Storage, backup]
### Component B- **Purpose**: [What it does]- **Technology**: [Stack]
## Data Flow1. [Step 1]2. [Step 2]3. [Step 3]
## Security- Authentication: [Method]- Authorization: [Method]- Encryption: [At rest/In transit]
## Failure Modes| Scenario | Impact | Mitigation ||----------|--------|------------|| Database down | Service unavailable | Retry logic, fallback || Network partition | Partial failure | Circuit breaker |
## Monitoring- [Metrics links]- [Logging links]- [Tracing links]
## Decisions| Date | Decision | Rationale ||------|----------|-----------|| 2024-01 | Chose PostgreSQL | ACID compliance needed |97.5 Best Practices
Section titled “97.5 Best Practices”Documentation Principles
Section titled “Documentation Principles”┌─────────────────────────────────────────────────────────────────────────┐│ DOCUMENTATION BEST PRACTICES │├─────────────────────────────────────────────────────────────────────────┤│ ││ 1. WRITE DOCS LIKE CODE ││ ┌─────────────────────────────────────────────────────────────────┐ ││ │ • Version control in Git │ ││ │ • Code review for docs │ ││ │ • Automated builds/deployments │ ││ │ • Test documentation links │ ││ └─────────────────────────────────────────────────────────────────┘ ││ ││ 2. DOCUMENT THE WHY ││ ┌─────────────────────────────────────────────────────────────────┐ ││ │ • Not just what, but why decisions were made │ ││ │ • Include context for future maintainers │ ││ │ • Link to RFCs and discussions │ ││ └─────────────────────────────────────────────────────────────────┘ ││ ││ 3. KEEP IT CURRENT ││ ┌─────────────────────────────────────────────────────────────────┐ ││ │ • Review docs regularly │ ││ │ • Automate updates where possible │ ││ │ • Mark stale docs clearly │ ││ │ • Delete obsolete content │ ││ └─────────────────────────────────────────────────────────────────┘ ││ ││ 4. MAKE IT ACCESSIBLE ││ ┌─────────────────────────────────────────────────────────────────┐ ││ │ • Searchable │ ││ │ • Consistent structure │ ││ │ • Link to related docs │ ││ │ • Version alongside code │ ││ └─────────────────────────────────────────────────────────────────┘ ││ ││ 5. START SIMPLE ││ ┌─────────────────────────────────────────────────────────────────┐ ││ │ • Minimum viable documentation │ ││ │ • Add detail iteratively │ ││ │ • Iterative improvement │ ││ └─────────────────────────────────────────────────────────────────┘ ││ │└─────────────────────────────────────────────────────────────────────────┘97.6 Interview Questions
Section titled “97.6 Interview Questions”┌─────────────────────────────────────────────────────────────────────────┐│ DOCUMENTATION INTERVIEW QUESTIONS │├─────────────────────────────────────────────────────────────────────────┤ │Q1: What types of documentation should a service have? │ │A1: │- Architecture documentation │- Runbooks for operations │- API documentation │- Post-mortems │- Onboarding guides │- Security documentation │ │─────────────────────────────────────────────────────────────────────────┤ │Q2: How do you keep documentation up to date? │ │A2: │- Version control with code │- Include docs in code review │- Automated deployment │- Regular documentation audits │- Assign ownership to teams │- Link docs to code (source of truth) │ │─────────────────────────────────────────────────────────────────────────┤ │Q3: What makes a good runbook? │ │A3: │- Clear ownership │- Step-by-step procedures │- Troubleshooting table │- Monitoring links │- Rollback procedures │- Emergency contacts │- Links to source code │ │─────────────────────────────────────────────────────────────────────────┤ │Q4: How do you document architecture decisions? │ │A4: │- Use ADRs (Architecture Decision Records) │- Include context and rationale │- Document alternatives considered │- Link to RFCs/proposals │- Include diagrams │ │─────────────────────────────────────────────────────────────────────────┤ │Q5: What tools do you use for documentation? │ │A5: │- Git-based (Markdown) for technical docs │- Mermaid/PlantUML for diagrams │- Static site generators (MkDocs, Hugo) │- API tools (Swagger, OpenAPI) │- Wiki for team knowledge │ │─────────────────────────────────────────────────────────────────────────┤ │Q6: How do you handle documentation for microservices? │ │A6: │- Each service owns its docs │- Central index/link repository │- Consistent templates │- Service catalog with links │- Shared components documented once │ │─────────────────────────────────────────────────────────────────────────┤ │Q7: What is a post-mortem and what should it include? │ │A7: │- What happened │- Impact │- Root cause │- Timeline │- What went well │- What could improve │- Action items │- Blameless focus │ │─────────────────────────────────────────────────────────────────────────┤ │Q8: How do you measure documentation quality? │ │A8: │- Usage metrics (views, searches) │- Staleness indicators │- Feedback from users │- Time to onboard new engineers │- Reduction in questions │- Accuracy (errors found) │ │└─────────────────────────────────────────────────────────────────────────┘Summary
Section titled “Summary”- Types: Architecture, Runbooks, Post-mortems, API Docs
- Tools: Markdown, MkDocs, Mermaid, Git-based
- Runbook: Owner, troubleshooting, deployment, rollback
- Best Practices: Keep current, version control, automate
Next Chapter
Section titled “Next Chapter”Last Updated: February 2026