Reliability in a Serverless world

Serverless @ Nederlandse Spoorwegen

Transcript

1. ComIT Driss Amri (AWSome) February 2023 Reliability in a Serverless world
2. What is Reliability
3. Availability Downtime Per Year Downtime Per Month 99% (“Two Nines”) 99.9% (“Three Nines”) 99.99% (“Four Nines”) 7,2 hours 3,65 days 43,2 minutes 8,76 hours 4,32 minutes 52,6 minutes
6. is the wrong reliability target for pretty much everything 100%
7. Reliability on AWS
14. Serverless Reliability
16. Multi-AZ out of the box
17. Multi-Region
18. Challenges • Protecting downstream services that don’t scale as well • Service Limit Quotas • More granular architectures • Denial Of Wallet • Per Function and Service (mis)configuration • Lots of services to choose from
19. Chaos Engineering
20. Chaos Engineering is the discipline of experimenting on a system in order to build confidence in the system’s capability to withstand turbulent conditions in production.
21. Chaos Engineering is the discipline of experimenting on a system in order to build confidence in the system’s capability to withstand turbulent conditions in production.
22. Chaos Engineering is the discipline of experimenting on a system in order to build confidence in the system’s capability to withstand turbulent conditions in production.
23. Chaos Engineering is the discipline of experimenting on a system in order to build confidence in the system’s capability to withstand turbulent conditions in production.
30. Common faults • Network ◦ Latency ◦ Bandwidth ◦ Failure to connect ◦ 4XX/5XX HTTP Response • Resource Exhaustion: ◦ CPU Stress ◦ Memory ◦ Disk Space • Weaknesses ◦ Error handling ◦ Timeout values ◦ Events ◦ Fallbacks ◦ Fail overs
31. Demo
32. Demo
38. Static stability using Availability Zones https://aws.amazon.com/builders-library/static-stability-using-availability-zones/ Beyond five 9s: Lessons from our highest available data planes https://www.youtube.com/watch?v=2L1S0zfnIzo Chaos testen voor betrouwbaarheid https://nsdigitaal.sharepoint.com/sites/TestenBijNS/SitePages/Chaos-testen-voor-betrouwbaarheid.as px?source=https%3A%2F%2Fnsdigitaal.sharepoint.com%2Fsites%2FTestenBijNS