Cluster information: 32 nodes include 3 master node and 29 worker nodes
Kubernetes version: 1.24.1
Cloud being used: (put bare-metal if not on a public cloud)
Installation method: using crio, flannel
Host OS: RHEL 8.4
CNI and version: flannel 0.23.1
CRI and version: crio 1.24.1
I’m currently studying on my own and have set up a Kubernetes cluster using five servers, but I’ve encountered a problem where one of the nodes cannot access ClusterIP, meaning it cannot connect to the k8s DNS.
(When entering the command telnet 10.96.0.10 53, only the problematic server fails to connect.)
Cluster Configuration Details:
The cluster is composed of three multi-master nodes and two worker nodes.
Using crio/k8s (v1.24.1), flannel (v0.22.3)
Given the situation described above, where do you think the problem might be? I would appreciate your expert opinion…