DevOps Beginner

What is Incident Management?

The process of detecting, responding to, and resolving service disruptions to minimize impact and restore normal operations.

Incident management follows a lifecycle: detection (alerts, user reports), triage (severity assessment), response (investigation, mitigation), resolution (fix applied), and post-mortem (blameless retrospective documenting what happened and how to prevent recurrence).

Key roles include Incident Commander (coordinates response), Communications Lead (updates stakeholders), and Subject Matter Experts (technical investigation). Tools include PagerDuty, OpsGenie, and Statuspage. SRE practices emphasize error budgets and toil reduction.

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A lightweight virtualization method that packages applications with their dependencies into isolated, portable containers.

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An endpoint or mechanism that reports whether an application is running correctly and ready to handle requests.

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

Immutable Infrastructure

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

Chaos Engineering

The discipline of deliberately introducing failures into a system to test its resilience and identify weaknesses before they cause outages.

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