Incident Library?

Incident Library?

Component ?

AWS VPC CNI AWS VPC CNI · `vpc-cni`

4 cases · 2023 to 2025

Root cause ?Capacity exhaustion 2 Configuration change 2

Contributing factor ?Unreviewed defaults 2 No capacity planning 2 Change during peak hours 1 No configuration tests 1 Ineffective rollback 1 Missed in review 1

Symptom ?IP address exhaustion 4 Pods Pending 2 Image pull failures 1 Node disk full 1 Pods stuck in ContainerCreating 1 Pod eviction 1

Cases, by severity

IL-0019 A module upgrade shrank node disks and filled them with images — UK Ministry of Justice, 2023, sev3
Root cause Configuration change
IL-0017 VPC CNI stopped allocating pod IPs on the live cluster — UK Ministry of Justice, 2023, sev3
Root cause Configuration change
IL-0007 Running out of IPv4 addresses in EKS before it became an outage — Adevinta, 2024, sev4
Root cause Capacity exhaustion
IL-0006 IP exhaustion with the AWS VPC CNI, then a warm-pool setting cascade — Neon, 2025
Root cause Capacity exhaustion

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