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TürkçeMeta: backbone outage, October 2021
Meta describes a maintenance command that disconnected its backbone. DNS and normal recovery tools were also affected.
Cases / sources
What real IT incidents reveal.
Public incident reports explain why dependencies, recovery and controlled changes matter.
Read, understand and apply the lessons.
The cases come from the operators’ published analyses. They are not Endurion customer references. Applicability to your environment requires a separate assessment.
GitLab: database recovery, January 2017
GitLab documents accidental database deletion and a recovery that could not restore every database change. Repositories and wikis did not suffer data loss.
AWS: US-EAST-1 event, December 2021
AWS explains the internal network dependencies of foundational services including monitoring, DNS, authorisation and parts of the EC2 control plane.
CrowdStrike: Windows update incident, July 2024
CrowdStrike describes Windows crashes caused by a content configuration update. It states the incident was not a cyberattack; Mac and Linux were unaffected.
GitHub: network and database incident, October 2018
GitHub explains how a brief network interruption triggered longer database and service problems, also affecting webhook delivery.
Next step
Which dependency needs attention?
Start with a specific service and the impact of its failure to define a useful assessment.