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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