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DevOps Intermediate

What is SRE (Site Reliability Engineering)?

An engineering discipline that applies software engineering principles to infrastructure and operations to create reliable systems.

Site Reliability Engineering, pioneered by Google, treats operations as a software problem. SRE teams define Service Level Objectives (SLOs), measure them through Service Level Indicators (SLIs), and use error budgets to balance reliability with feature velocity. When the error budget is exhausted, teams prioritize reliability work over new features. Key practices include toil automation (eliminating repetitive manual work), blameless postmortems, capacity planning, and progressive rollouts. SRE bridges the gap between development speed and operational stability.

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An architectural style where an application is composed of small, independent services that communicate over APIs.
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The practice of collecting, analyzing, and alerting on system metrics and logs to ensure application health and performance.
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The process of detecting, responding to, and resolving service disruptions to minimize impact and restore normal operations.
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