# SRE

This page and its sub-pages contain my notes from studying the Google SRE workbooks:

**How Google Runs Production Systems:** <https://sre.google/workbook/table-of-contents/>

**Practical Ways to Implement SRE:** <https://sre.google/sre-book/table-of-contents/> \ <br>

## **Pre-DevOps**

**Operations Challenges**: Complex, context-dependent; often treated as cost center in enterprises.

## **DevOps**

* **Principles**: CALMS (Culture, Automation, Lean, Measurement, Sharing)
* **Focus**: Collaboration, continuous improvement, no silos.
* **Key Ideas**:
  * Accidents are normal and expected.
  * Gradual, small changes preferred.
  * Culture over tooling for success.
  * Measurement crucial for improvement.

## **SRE**

* **Definition**: Implementing DevOps philosophy with a focus on concrete practices.
* **Principles**:
  * Operations is a software problem.
  * Manage by Service Level Objectives (SLOs).
  * Minimize toil; automate where possible.
  * Wisdom of production informs design.
  * Reduce cost of failure to enhance development speed.
  * Share ownership with developers.
  * Unified tooling across roles.

## **Comparison**

* **Similarities**:
  * Acceptance of change.
  * Collaboration and shared ownership.
  * Small, continuous changes.
  * Importance of measurement and blameless postmortems.
  * Holistic approach to improvement.
* **Differences**:
  * DevOps: Broader, culture-focused; not detailed in service management.
  * SRE: Service-specific, structured around detailed principles like SLOs and error budgets.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://notes.mikaelsamvelian.com/devops-knowledge/sre.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.