🛡️
The Tiny SRE
A Baby Book About Reliability
Site Reliability Engineering
Hello, Little Reliability Engineer!
An SRE keeps everything running smoothly.
Like , who keeps YOU running smoothly. Every. Single. Day.
✅ All Systems Go!
💚
UPTIME: 100%
NO INCIDENTS DETECTED
Reliability
Always There
Reliability means being there when you are needed.
has 100% uptime for you. No downtime. No outages. No offline mode.
💪 Highly Available!
SLO Target
99.9%
LOVE ALWAYS DELIVERED
SLO
A Promise You Keep
An SLO is a Service Level Objective. A promise.
's SLO: always come home. Always give hugs. 99.9% uptime, minimum.
📊 Promise Kept!
ERROR BUDGET REMAINING
EXHAUSTEDFULL
Baby used 85% of theirs before 9am 😅
Error Budget
A Little Room for Mistakes
An error budget is how many mistakes are allowed. Some errors are OK!
Babies have zero error budget left by breakfast. And that is fine too. 😄
⚠️ Budget Depleted!
On-Call
Always On-Call
On-call means being ready to respond at any hour. Any minute.
has been on-call since you were born. No rotations. No handoff.
📟 Page Acknowledged!
🚨 P0 INCIDENT DECLARED
Service: Baby
Status: Crying (Critical)
ETA to resolve: Unknown
Action: Hug immediately
Incident
Something Went Wrong!
An incident is when something breaks and needs fixing fast.
Baby crying = P0 incident. drops everything. Every single time.
🚨 Incident Resolved!
🍼Bottles
🧷Nappies
🛁Bath time
🌀Repeat
😴No sleep
🔄Again
∞ toil loop detected
Toil
The Work That Never Ends
Toil is repetitive work that has to be done over and over again.
does it all. With love. Every single loop. No automation in sight.
🔄 Toil is Love!
📝 Blameless Postmortem
What happened: Baby cried for 2 hours
Root cause: Hungry AND tired AND gassy
Who is to blame: Nobody. Never.
What we learned: Check ALL the things first
Action item: More cuddles. Always.
Postmortem
Learn Without Blame
After every incident, SREs ask: what happened and how do we improve?
No blame. Just learning. Just love. Every time.
📝 Lessons Learned!
❤️
UPTIME: FOREVER
SLO: 100% LOVE ALWAYS DELIVERED
The End 🛡️
The Best SRE
Systems sleep. Servers rest. Alerts go quiet.
But 's love for you runs 24/7. Zero downtime. Forever guaranteed. 💚
Always Reliable! 🛡️