Modern System Administration Managing Reliable and Sustainable Systems 1st Edition by Jennifer Davis 1492055212 9781492055211

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ISBN 10: 1492055212

ISBN 13: 9781492055211

Author: Jennifer Davis

Early system administration required in-depth knowledge of a variety of services on individual systems. Now, the job is increasingly complex and different from one company to the next with an ever-growing list of technologies and third-party services to integrate. How does any one individual stay relevant in systems and services? This practical guide helps anyone in operations—sysadmins, automation engineers, IT professionals, and site reliability engineers—understand the essential concepts of the role today. Collaboration, automation, and the evolution of systems change the fundamentals of operations work. No matter where you are in your journey, this book provides you the information to craft your path to advancing essential system administration skills. Author Jennifer Davis provides examples of modern practices and tools with recommended materials to advance your skills. Topics include: Development and testing: Version control, fundamentals of virtualization and containers, testing, and architecture review Deploying and configuring services: Infrastructure management, networks, security, storage, serverless, and release management Scaling administration: Monitoring and observability, capacity planning, log management and analysis, and security and compliance

Modern System Administration Managing Reliable and Sustainable Systems 1st Table of contents:

I. Reasoning About Systems

1. Patterns and Interconnections

How to Connect Things

How Things Communicate

Application Layer

Transport Layer

Network Layer

Data Link Layer

Physical Layer

Wrapping Up

2. Computing Environments

Common Workloads

Choosing the Location of Your Workloads

On-Prem

Cloud Computing

Compute Options

Serverless

Containers

Virtual Machines

Guidelines for Choosing Compute

Wrapping Up

3. Storage

Why Care About Storage?

Key Characteristics

Storage Categories

Block Storage

File Storage

Object Storage

Database Storage

Considerations for Your Storage Strategy

Anticipate Your Capacity and Latency Requirements

Retain Your Data as Long as Is Reasonably Necessary

Respect the Privacy Concerns of Your Users

Defend Your Data

Be Prepared to Handle Disaster Recovery Situations

Wrapping Up

4. Network

Caring About Networks

Key Characteristics of Networks

Build a Network

Virtualization

Software-Defined Networks

Content Distribution Networks

Guidelines to Your Network Strategy

Wrapping Up

II. Practices

5. Sysadmin Toolkit

What Is Your Digital Toolkit?

The Components of Your Toolkit

Choosing an Editor

Choosing Programming Languages

Frameworks and Libraries

Other Helpful Utilities

Wrapping Up

6. Version Control

What Is Version Control?

Benefits of Version Control

Organizing Infra Projects

Wrapping Up

7. Testing

You’re Already Testing

Common Types of Testing

Linting

Unit Tests

Integration Tests

End-to-End Tests

Explicit Testing Strategy

Improving Your Tests; Learning from Failure

Next Steps

Wrapping Up

8. Infrastructure Security

What Is Infrastructure Security?

Share Security Responsibilities

Borrow the Attacker Lens

Design for Security Operability

Categorize Discovered Issues

Wrapping Up

9. Documentation

Know Your Audience

Dimensions of Documentation

Organization Practices

Organizing a Topic

Organizing a Site

Recommendations for Quality Documentation

Wrapping Up

10. Presentations

Know Your Audience

Choose Your Channel

Choose Your Story Type

Storytelling in Practice

Case #1: Charts Are Worth a Thousand Words

Case #2: Telling the Same Story with a Different Audience

The Key Takeaways

Know Your Visuals

Visual Cues

Chart Types

Recommended Visualization Practices

Wrapping Up

III. Assembling the System

11. Scripting Infrastructure

Why Script Your Infrastructure?

Three Lenses to Model Your Infrastructure

Code to Build Machine Images

Code to Provision Infrastructure

Code to Configure Infrastructure

Getting Started

Wrapping Up

12. Managing Your Infrastructure

Infrastructure as Code

Treating Your Infrastructure as Data

Getting Started with Infrastructure Management

Linting

Writing Unit Tests

Writing Integration Tests

Writing End-to-End Tests

Wrapping Up

13. Securing Your Infrastructure

Assessing Attack Vectors

Manage Identity and Access

How Should You Control Access to Your System?

Who Should Have Access to Your System?

Manage Secrets

Password Managers and Secret Management Software

Defending Secrets and Monitoring Usage

Securing Your Computing Environment

Securing Your Network

Security Recommendations for Your Infrastructure Management

Wrapping Up

IV. Monitoring the System

14. Monitoring Theory

Why Monitor?

How Do Monitoring and Observability Differ?

Monitoring Building Blocks

Events

Monitors

Data: Metrics, Logs, and Tracing

First-Level Monitoring

Event Detection

Data Collection

Data Reduction

Data Analysis

Data Presentation

Second-Level Monitoring

Wrapping Up

15. Compute and Software Monitoring in Practice

Identify Your Desired Outputs

What Should You Monitor?

Do What You Can Now

Monitors That Matter

Plan for a Monitoring Project

What Alerts Should You Set?

Examine Monitoring Platforms

Choose a Monitoring Tool or Platform

Wrapping Up

16. Managing Monitoring Data

What Is Monitoring Data?

Metrics

Logs

Structured Logs

Tracing

Distributed Tracing

Choose Your Data Types

Retain Log Data

Analyze Log Data

Monitoring Data at Scale

Wrapping Up

17. Monitor Your Work

Why Should You Monitor Your Work?

Manage Your Work with Kanban

Choose a Platform

Find the Interesting Information

Wrapping Up

V. Scaling the System

18. Capacity Management

What Is Capacity?

The Capacity Management Model

Resource Procurement

Justification

Management

Monitoring

The Framework for Capacity Planning

Do You Need Capacity Planning with Cloud Computing?

Wrapping Up

19. Developing On-Call Resilience

What Is On-Call?

Humane On-Call Processes

Check Your On-Call Policies

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

20. Managing Incidents

What Is an Incident?

What Is Incident Management?

Planning and Preparing for Incidents

Set Up and Document Communication Channels

Train for Effective Communication

Create Templates

Maintain Documentation

Document the Risks

Practice Failure

Understand Your Tools

Clearly Define Roles and Responsibilities

Understand Severity Levels and Escalation Protocols

Responding to Incidents

Learning from the Incident

How Deep Should You Dig?

Aiding Discovery

Documenting Incidents Effectively

Distributing the Information

Next Steps

Wrapping Up

21. Leading Sustainable Teams

Collective Leadership

Adopt a Whole-Team Approach

Build Resilient On-Call Teams

Update On-Call Processes

Monitor the Team’s Work

Why Monitor the Team?

What Should You Monitor?

Measure Impact on the Team

Support Team Infrastructure with Documentation

Budget a Learning Culture

Adapt to Challenges

Wrapping Up

Conclusion

A. Protocols in Practice

Hypertext Transfer Protocol

QUIC

Domain Name System

B. Resolving Test Failures

Test Failure Type #1: Environment Problems

Test Failure Type #2: Flawed Test Logic

Test Failure Type #3: Changing Assumptions

Test Failure Type #4: Flaky Tests

Test Failure Type #5: Code Defects

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