메트릭 서버 tag - Voyager of Linux

다양한 메트릭 서버 설치에 관한 오류들을 알아보자. kubectl top node Error from server (ServiceUnavailable): the server is currently unable to handle the request (get nodes.metrics.k8s.io)

$ kubectl top pod
Error from server (ServiceUnavailable): the server is currently unable to handle the request (get pods.metrics.k8s.io)

1 2	$ kubectl top pod Error from server (ServiceUnavailable): the server is currently unable to handle the request (get pods.metrics.k8s.io)

메트릭 서버(Metric Server) 의 파드(Pod)가 정상적으로 Running 상태라 하더라도 이와같은 오류 메시지를 만날 수 있다. 이 오류는 kube-apiserver 의 로그에 다음과 같이 관련 오류가 나온다.

Apr 23 15:49:33 kmaster1.systemv.local kube-apiserver[4598]: E0423 15:49:33.330967    4598 available_controller.go:508] v1beta1.metrics.k8s.io failed with: Operation cannot be fulfilled on apiservices.apir>Apr 23 15:49:38 kmaster1.systemv.local kube-apiserver[4598]: E0423 15:49:38.332227    4598 available_controller.go:508] v1beta1.metrics.k8s.io failed with: failing or missing response from https://10.32.0.>Apr 23 15:49:43 kmaster1.systemv.local kube-apiserver[4598]: E0423 15:49:43.333609    4598 available_controller.go:508] v1beta1.metrics.k8s.io failed with: failing or missing response from https://10.32.0.

Apr 23 15:49:33 kmaster1.systemv.local kube-apiserver[4598]: E0423 15:49:33.330967 4598 available_controller.go:508] v1beta1.metrics.k8s.io failed with: Operation cannot be fulfilled on apiservices.apir>Apr 23 15:49:38 kmaster1.systemv.local kube-apiserver[4598]: E0423 15:49:38.332227 4598 available_controller.go:508] v1beta1.metrics.k8s.io failed with: failing or missing response from https://10.32.0.>Apr 23 15:49:43 kmaster1.systemv.local kube-apiserver[4598]: E0423 15:49:43.333609 4598 available_controller.go:508] v1beta1.metrics.k8s.io failed with: failing or missing response from https://10.32.0.

뒤쪽에 삭제된 부분은 “net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)” 이다. 응답커넥션을 맺다가 안되서 timeout 으로 끝난 것이다. 이것은 kube-apiserver 다음의 커맨드 파라메터를 […]