Site Reliability Engineering (SRE)

Site Reliability Engineering (SRE) is a discipline, pioneered by Google, that applies the principles of software engineering to infrastructure and operations problems. The core philosophy treats operations as a software problem, where teams build and run systems through code and automation rather than manual intervention. Key to this approach is the use of Service Level Objectives (SLOs) to define reliability targets, which in turn create an "error budget"—an acceptable level of unreliability that empowers teams to balance the risk of launching new features with the need for system stability. By focusing on eliminating toil (manual, repetitive work) and creating scalable, automated solutions, SRE provides a concrete implementation of DevOps principles, fostering shared ownership between development and operations to build and maintain resilient systems.

1. Introduction to Site Reliability Engineering
   1. Defining SRE
      1. Core Philosophy
      2. Key Goals of SRE
      3. Historical Context at Google
      4. Evolution of SRE Practices
   2. SRE vs Traditional Operations
      1. Proactive vs Reactive Approaches
      2. Role of Automation in SRE
      3. Mindset and Cultural Differences
      4. Impact on Organizational Structure
   3. SRE and DevOps
      1. SRE as DevOps Implementation
      2. Shared Ownership and Collaboration
      3. Differences and Overlaps with DevOps
      4. CAMS Model in SRE
         1. Culture
         2. Automation
         3. Measurement
         4. Sharing