Modern System Administration: Managing Reliable and Sustainable Systems

Preface
	Conventions Used in This Book
	Using Code Examples
	O’Reilly
	How to Contact Us
	Acknowledgments
I. Foundations
1. Introduction
	Principles
	Modernization of Compute, Network and Storage
		Compute
		Network
		Storage
	Infrastructure Management
	Scaling Production Readiness
	A Role by any Other Name
		DevOps
		Site Reliability Engineering (SRE)
		How do Devops and SRE Differ?
		System Administrator
	Finding Your Next Opportunity
2. Infrastructure Strategy
	Understanding Infrastructure Lifecycle
		Lifecycle of Physical Hardware
		Lifecycle of Cloud Services
		Challenges to Planning Infrastructure Strategy
	Infrastructure Stacks
	Infrastructure as Code
	Wrapping Up
II. Principles
3. Version Control
	Fundamentals of Git
		Branching
	Working with Remote Git Repositories
	Resolving Conflicts
	Fixing Your Local Repository
	Advancing Collaboration with Version Control
	Wrapping Up
4. Local Development Environments
	Choosing an Editor
		Minimizing required mouse usage
		Integrated Static Code Analysis
		Easing editing through auto completion
		Indenting code to match team conventions
		Collaborating while editing
		Integrating workflow with git
		Extending the development environment
	Selecting Languages to Install
	Installing and Configuring Applications
	Wrapping Up
5. Testing
	Why should Sysadmins Write Tests?
	Differentiating the Types of Testing
		Linting
		Unit Tests
		Integration Tests
		End-to-End Tests
	Examining the Shape of Testing Strategy
	Existing Sysadmin Testing Activities
	When Tests Fail
		Environment Problem
		Flawed Test Logic
		Assumptions Changed
		Code Defects
		Failures in Test Strategy
	Flaky Tests
	Wrapping Up
6. Security
	Collaboration in Security
	Borrow the Attacker Lens
	Design for Security Operability
		Qualifying Issues
	Wrapping Up
III. Principles in Practice
7. Infracode
	Building Machine Images
		Building with Packer
		Building With Docker
	Provisioning Infrastructure Resources
	Provisioning with Terraform
	Configuring Infrastructure Resources
		Configuring with Chef
	Getting Started with Infracode
	Wrapping Up
8. Testing in Practice
	Writing Unit Tests for Infracode
		Writing Unit Tests with Chefspec
		Writing Unit Tests for Datadog Install Recipe
	Writing Integration Tests for Infracode
		Writing Integration Tests for Datadog Install Recipe
		Linting Chef Code with Rubocop and Foodcritic
	Wrapping Up
9. Security and Infracode
	Managing Identity and Access
		How should you control access to your system?
		Who should have access to your system?
	Managing Secrets
		Password Managers and Secret Management Software
		Defending Secrets and Monitoring Usage
	Securing Compute Infrastructure
	Managing Networking
	Recommendations for your Security Infracode
IV. Scaling Production Readiness
10. Monitoring Theory
	Why Monitor?
	How Monitoring and Observability Differ?
	Monitoring Building Blocks
		Events
		Monitors
		Data: Metrics, Logs, and Tracing
	What does Monitoring look like?
		Event Detection
		Data Collection
		Data Reduction
		Data Analysis
		Data Presentation
	Monitoring for Sustainable Work
11. Presenting Information
	Know your audience
	Choosing your channel
	Choose your story type
	Presenting Data in Action
		Charts are Worth A Thousand Words.
		Telling the Same Story With a Different Audience
		The Key Takeaway
	Know your visuals
		Visual Cues
		Chart types
	Recommended Visualization Practices
12. Developing On-Call Resilience
	What Is On-Call?
	Humane On-Call Processes
		Preparing for On-Call
		One Week Out
		The Night Before
		Your On-Call Rotation
		On-Call Handoff
		The Day After On-Call
	Monitor the On-Call Experience
	Wrapping Up
13. Managing Incidents
	What is an Incident?
	What is Incident Management?
		Roles and Responsibilities
	Pre-emptive Planning
	Handling the Incident
	Post-incident meeting
	Practice Failure