SLIs,SLOs, SLAs - The WHY, WHAT, and HOW

Embrace the Site Reliability Mindset with Alex Ewerlöf, Sr. Staff Engineer @ Volvo Cars 🚗 and SRE thought leader. Understand how the different aspects of site reliability work together 🪢 and when you need a DevOps vs. Platform Team vs. SRE. Find out how to set your own Service Level Indicators (SLI), Service Level Objectives (SLO), and Service Level Agreements (SLA), as laid out by the creator of the Service Level Calculator. Listen to find out:

• SRE 👷 vs. DevOps ⚒️ vs. Platform Engineering🏗️
• Service Level 101: How to set SLIs🚦, SLOs 🎯and SLAs 🤝
• Washing Machine 🧺🫧 vs. Laundry Room🫧🏘️: The Challenges of Standardization
• OnCall🎧⚠️: Centralised vs. Team-based?
• The unique software challenges of the automotive industry.

Listen here

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Timestamps:

(00:00:00) Intro (00:04:04) Who is Alex (00:05:14) The Nerd Journey: From Assembling Computers to SRE (00:06:58) The Evolution of a Site Reliability Engineer (00:07:55) SRE vs. DevOps vs. Platform Engineering (00:08:32) Washing Machine vs. Laundry Room: The Challenge of Standardization in Large Organizations (00:10:56) Platform vs. SRE (if you are not Google) (00:12:37) Common Platform without Premature Standardisation (00:13:55) Software in Car Companies (00:14:40) Volvo's Strategic Shift Towards In-House Software Development (00:15:06) Swedish Tech Scene: Why Volvo now has offices in Stockholm (00:16:53) Central Platform for Software in the Automotive Industry? (00:18:35) Role of CSO: Chief Software Officer (00:20:09) When the platform is the Product (e.g. Cars) (00:21:42) Implementing Service Levels: A Guide to SLIs, SLOs, and SLAs (00:22:20) What is SLI (Service Level Indicator) (00:22:40) What is SLO (Service Level Objective) (00:23:20) What is SLA (Service Level Agreement) (00:24:24) Leveraging SLOs for autonomous teams in complex products (00:26:08) Relationship between SLI and other Engineering Metrics (00:28:04) Getting Started with Service Levels (00:28:48) STEP 1. Understand SLI/SLOs (00:29:10) STEP 2. Workshop: Identify your Service and What Matters (00:30:02) Setting up SLIs and Alerting for SLIs (00:31:02) STEP 3. Calculate your SLI (00:31:44) STEP 4. Empower team with Good On-Call Practices (00:32:17) Getting Buy-In Across the Organisation (00:33:33) The Significance of Choosing the Right SLIs (00:34:06) Ways to Measure Availability (00:35:43) On-Call Management: Team vs. Centralized Approaches (00:38:22) Downtime of External Vendors (00:40:47) Why SLI needs to come from consumers (00:43:01) SLOs: Setting Realistic SLOs and Avoiding Common Pitfalls (00:44:05) Meaning of 'Objective' differs in OKR and SLO (00:46:18) Financial Incentive to Fail Less? (00:48:43) Biggest Mistakes (00:49:30) No Blame Game - Public Metrics Need Cultural Fit (00:51:50) Advice to Younger Self (00:53:01) Stay Curious (00:53:30) Don't Confuse Confidence with Competence (00:54:47) Outro

About Alex Ewerlöf #

Alex Ewerlof is a Snr. Staff Engineer at Volvo Cars and a Site Reliability Engineering thought leader. He is the author of the Reliability Engineering Mindset, creator of Service Level Calculator and regularly shares insights on his website AlexEwerlof.com. Get 40% off his book with this coupon code.

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