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Cluster information:
Kubernetes version: v1.15.6
Cloud being used: (put bare-metal if not on a public cloud)
Installation method: kubadm
Host OS: centos7
CNI and version: flannel
CRI and version: 18.09.9
I have three master in my k8s cluster, they are very normal before today, but today one of them can’t connect the nodes, when I run “kubectl get ns” , it not response, even I run “ping nodes IP address”, it still can’t response, I don’t know why, can you some one have met kind of issues ? or give me some suggestions to understand why? thank you in advance.
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