Zonky, 17.1.2017

1. SRE in startup
Zonky 17.1.2017
Ladislav Prskavec, Apiary
ladislav@apiary.io
@abtris
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2. What is SRE?
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3. "What happens when a software engineer is tasked with what used to
be called operations."
» Ben Treynor Sloss, Vice President, Google Engineering,
founder of Google SRE
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4. "Our work is like being part of the world's most intense pit crew. We
change the tires of a race car as it's going 100 mph."
» Andrew Widdowson, Site Reliability Engineer, Mountain View
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5. In general, an SRE team is responsible for:
» availability
» latency
» performance
» efficiency
» change management
» monitoring
» emergency response
» capacity planning
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6. 6

7. If the team agrees on a 99.9% SLA,
that gives them an error budget of
0.1%.
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8. 8

9. Rule
If service is in SLA, launch away
- clearly DEV team is doing a good job
If service is not within SLA, launch freeze
- Until you earn back enough error budget
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10. Error budget
» removes SRE - DEV conflict
» DEV teams make self-police
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11. Common staffing pool
» one more SRE = one less Dev
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12. SRE hires only coders
» they get bored easily
» speak same language as Dev
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13. 50% cap on ops work
» if you succeed works scales with traffic
» coding reduce work / traffic ratio
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14. Keep Dev in rotation
» 5% ops handled by devs
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15. Speaking of Dev and Ops work
» excess operations load (tickets, oncall, etc.)
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16. SRE portability
» no requirement to stick with project or SRE
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17. Outages
» minimalize impact
» prevent recurrence
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18. Minimalize damage
» no NOC
» good diagnostic information
» practice, practice, practice
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19. Prevent recurrence
1. Handle event
2. Write post-mortems
3. Reset
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20. Post-mortems philosophy
» blameless, focus on process and technology
» create timeline
» get all facts
» create bugs for all followup work
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21. How are specific SRE
in startup?
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22. 1:10
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23. Horizontal team
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24. SaaS oriented
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25. Oncall culture
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26. It's cool work
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27. SRE book
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28. "May the Queries Flow,
And the Pagers Remain Silent"
SRE Benediction
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