Hidalgo Alex. Implementing Service Level Objectives: A Practical Guide to SLIs, SLOs, and Error Budgets (Early Release)

O’Reilly, 2020. — 112 p.Although service-level objectives (SLOs) continue to grow in importance, there’s a distinct lack of information about how to implement them. Practical advice that does exist usually assumes that your team already has the infrastructure, tooling, and culture in place. In this book, recognized SLO expert Alex Hidalgo explains how to build an SLO culture from the ground up.Ideal as a primer and daily reference for anyone creating both the culture and tooling necessary for SLO-based approaches to reliability, this guide provides detailed analysis of advanced SLO and service-level indicator (SLI) techniques. Armed with mathematical models and statistical knowledge to help you get the most out of an SLO-based approach, you’ll learn how to build systems capable of measuring meaningful SLIs with buy-in across all departments of your organization.To start off, we’ll need definitions of a few important bits of terminology: service level indicators (SLIs), service level objectives (SLOs), service level agreements (SLAs), and error budgets. At the base of The Reliability Stack you have SLIs, or service level indicators. A service level indicator is a measurement that is determined over a metric, or a piece of data representing some property of a service. A good SLI measures your service from the perspective of your users.Define SLIs that meaningfully measure the reliability of a service from a user’s perspective
Choose appropriate SLO targets, including how to perform statistical and probabilistic analysis
Use error budgets to help your team make better data-driven decisions
Build supportive tooling and resources required for an SLO-based approach
Use SLO data to present meaningful reports to leadership and your users