Practical Monitoring · Effective Strategies for the Real World by Julian, Mike -- Read -- Imperial Library of Trantor

Index

Preface

Who Should Read This Book Why I Wrote This Book A Word on Monitoring Today Navigating This Book Online Resources Conventions Used in This Book Using Code Examples O’Reilly Safari How to Contact Us Acknowledgments

I. Monitoring Principles 1. Monitoring Anti-Patterns

Anti-Pattern #1: Tool Obsession

Monitoring Is Multiple Complex Problems Under One Name Avoid Cargo-Culting Tools Sometimes, You Really Do Have to Build It The Single Pane of Glass Is a Myth

Anti-Pattern #2: Monitoring-as-a-Job Anti-Pattern #3: Checkbox Monitoring

What Does “Working” Actually Mean? Monitor That. OS Metrics Aren’t Very Useful—for Alerting Collect Your Metrics More Often

Anti-Pattern #4: Using Monitoring as a Crutch Anti-Pattern #5: Manual Configuration Wrap-Up

2. Monitoring Design Patterns

Pattern #1: Composable Monitoring

The Components of a Monitoring Service

Data collection

Metrics Logs

Data storage Visualization Analytics and Reporting Alerting

Pattern #2: Monitor from the User Perspective Pattern #3: Buy, Not Build

It’s Cheaper You’re (Probably) Not an Expert at Architecting These Tools SaaS Allows You to Focus on the Company’s Product No, Really, SaaS Is Actually Better

Pattern #4: Continual Improvement Wrap-Up

3. Alerts, On-Call, and Incident Management

What Makes a Good Alert?

Stop Using Email for Alerts Write Runbooks Arbitrary Static Thresholds Aren’t the Only Way Delete and Tune Alerts Use Maintenance Periods Attempt Automated Self-Healing First

On-Call

Fixing False Alarms Cutting Down on Needless Firefighting Building a Better On-Call Rotation

Incident Management Postmortems Wrap-Up

4. Statistics Primer

Before Statistics in Systems Operations Math to the Rescue! Statistics Isn’t Magic Mean and Average Median Seasonality Quantiles Standard Deviation Wrap-Up

II. Monitoring Tactics 5. Monitoring the Business

Business KPIs Two Real-World Examples

Yelp Reddit

Tying Business KPIs to Technical Metrics My App Doesn’t Have Those Metrics! Finding Your Company’s Business KPIs Wrap-Up

6. Frontend Monitoring

The Cost of a Slow App Two Approaches to Frontend Monitoring Document Object Model (DOM)

Frontend Performance Metrics

Navigation Timing API Speed Index

OK, That’s Great, but How Do I Use This?

Logging Synthetic Monitoring Wrap-Up

7. Application Monitoring

Instrumenting Your Apps with Metrics

How It Works Under the Hood

Monitoring Build and Release Pipelines Health Endpoint Pattern Application Logging

Wait a Minute…Should I Have a Metric or a Log Entry? What Should I Be Logging? Write to Disk or Write to Network?

Serverless / Function-as-a-Service Monitoring Microservice Architectures Wrap-Up

8. Server Monitoring

Standard OS Metrics

CPU Memory Network Disk Load

SSL Certificates SNMP Web Servers Database Servers Load Balancers Message Queues Caching DNS NTP Miscellaneous Corporate Infrastructure

DHCP SMTP

Monitoring Scheduled Jobs Logging

Collection Storage Analysis

Wrap-Up

9. Network Monitoring

The Pains of SNMP

What Is SNMP? How Does It Work? A Word on Security How Do I Use SNMP?

Installation and configuration on Linux Installation configuration on macOS Testing net-snmp Installing vendor MIBs That’s great, Mike. But where’s the list of OIDs I should monitor?

Interface Metrics Interface and Logging Recap

Configuration Tracking Voice and Video Routing Spanning Tree Protocol (STP) Chassis

CPU and Memory Hardware

Flow Monitoring Capacity Planning

Working Backward Forecasting

Wrap-up

10. Security Monitoring

Monitoring and Compliance User, Command, and Filesystem Auditing

Setting Up auditd auditd and Remote Logs

Host Intrusion Detection System (HIDS) rkhunter Network Intrusion Detection System (NIDS) Wrap-Up

11. Conducting a Monitoring Assessment

Business KPIs Frontend Monitoring Application and Server Monitoring Security Monitoring Alerting Wrap-Up

A. An Example Runbook: Demo App

Demo App Metadata Escalation Procedure External Dependencies Internal Dependencies Tech Stack Metrics and Logs Alerts

B. Availability Chart Index

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