OpenAI's comprehensive postmortem on the outage revealed that the disruption was due to a new telemetry service improperly configured, which overwhelmed the Kubernetes API servers.
The new telemetry service's overwhelming demands on the Kubernetes API caused a cascading failure in the Kubernetes control plane for many of OpenAI's large service clusters.
DNS resolution complications arose from OpenAI's telemetry service, which hampered the visibility of the outage and delayed understanding of the ensuing problems.
OpenAI acknowledged that while they detected the issue shortly before it affected customers, their DNS caching mechanism obscured an understanding of the broader implications.
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