Troubleshooting the NodeNetworkInterfaceFlapping alert with node-exporter in OpenShift Container Platform 4.

Issue

• Node-exporter is crashing while generating the OS and hardware metrics exposed by kernel.
• Applications and pods on the node in the cluster may no longer be able to operate with other services, as the network attached could suffer performance issues or even data loss.
• Getting a NodeNetworkInterfaceFlapping alert.

 - alert: NodeNetworkInterfaceFlapping
    annotations:
      message: Network interface "{{ $labels.device }}" changing it's up status often on node-exporter {{ $labels.namespace }}/{{ $labels.pod }}"
    expr: |
      changes(node_network_up{job="node-exporter",device!~"veth.+"}[2m]) > 2
    for: 2m
    labels:
      severity: warning