DevOps Beginner

What is Runbook?

A documented set of standardized procedures for handling routine operations and incident response in production systems.

Runbooks provide step-by-step instructions for operational tasks like deploying updates, scaling services, responding to alerts, and recovering from failures. They reduce Mean Time To Recovery (MTTR) by giving on-call engineers clear procedures instead of requiring them to diagnose from scratch. Modern runbooks range from simple Markdown documents to interactive notebooks that can execute commands. Runbook automation takes this further by encoding procedures as scripts that can be triggered automatically by monitoring alerts, reducing human intervention and error.

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Related Terms

Infrastructure Drift

The divergence between the actual state of infrastructure and its defined desired state, caused by manual changes or untracked modifications.

Pipeline as Code

Defining CI/CD pipeline configurations as version-controlled code files rather than through UI-based pipeline builders.

Immutable Infrastructure

An approach where servers are never modified after deployment — changes require building and deploying entirely new server instances.

Semantic Versioning

A versioning scheme using MAJOR.MINOR.PATCH numbers that communicates the nature of changes in each release.

A server that acts as the single entry point for API requests, handling routing, authentication, rate limiting, and monitoring.

A distributed version control system that tracks changes in source code during software development.

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