[{"id":"IL-0047","title":{"en":"Pod-to-pod requests delayed by 5, 10 or 15 seconds because of DNS lookups lost to a conntrack race","ko":"conntrack 경합으로 DNS 조회가 5초씩 늦어져 파드 사이 요청이 간헐적으로 5초, 10초, 15초씩 지연되었다."},"org":"MindTickle","org_slug":"mindtickle","date":"2019-08-05","severity":"unknown","root_cause":"dns-network","url":"https://benchlet.com/incidentlib/app/cases/IL-0047","shared_components":["linux-kernel","conntrack"]},{"id":"IL-0178","title":{"en":"On EKS, HPA scale-in returned 502 errors because containers stopped before their pod IPs left the Service endpoints, and after blue/green switches conntrack kept sending established connections to deleted pods behind an instance-mode ALB","ko":"EKS 에서 HPA 가 파드를 줄일 때 엔드포인트 제거보다 컨테이너 종료가 먼저 끝나 502 가 났고, 블루/그린 전환 뒤에는 conntrack 에 남은 연결이 삭제된 파드로 가서 클라이언트가 타임아웃을 받았다."},"org":"Lotte E-commerce","org_slug":"lotte-e-commerce","date":"2022-10-21","severity":"unknown","root_cause":"dns-network","url":"https://benchlet.com/incidentlib/app/cases/IL-0178","shared_components":["conntrack"]},{"id":"IL-0056","title":{"en":"Calls from EKS pods to services behind an NLB in another VPC failed intermittently because the AWS VPC CNI did source NAT on the node","ko":"kops 에서 EKS 로 옮긴 뒤 AWS VPC CNI 의 SNAT 때문에 파드에서 다른 VPC 의 NLB 뒤 서비스로 가는 호출이 간헐적으로 실패했다"},"org":"MindTickle","org_slug":"mindtickle","date":"2020-03-16","severity":"unknown","root_cause":"dns-network","url":"https://benchlet.com/incidentlib/app/cases/IL-0056","shared_components":["vpc-cni"]},{"id":"IL-0049","title":{"en":"Partial DNS outage after CoreDNS scaled down and kube-proxy failed to delete stale conntrack entries","ko":"CoreDNS 파드가 줄어든 뒤 kube-proxy 가 conntrack 항목을 지우지 못해 일부 서비스의 DNS 요청이 없어진 파드로 가면서 5xx 가 쏟아졌다"},"org":"Preply","org_slug":"preply","date":"2020-02-28","severity":"unknown","root_cause":"dns-network","url":"https://benchlet.com/incidentlib/app/cases/IL-0049","shared_components":["conntrack"]}]