Pod保持在ContainerCreating状态，并显示“ Failed create pod sand sandbox”消息

Question

Performed an upgrade of K8S AWS cluster from 1.8.4 to 1.9.8 using kops.

All "development" pods and some pods from kube-system namespace (cluster-autoscaler, kube-dns, kube-dns-autoscaler, kubernetes-dashboard, heapster) stuck in " ContainerCreating " state.

Pods describe command shows message: " Failed create pod sandbox " and " Pod sandbox changed, it will be killed and re-created. "

Any ideas what could be the reason for such behavior or how to fix it?

Answer 1

This is becoming a FAQ

But Pod sandbox errors are almost always CNI failures , which goes double for your situation since I don't know that 1.8 even used CNI