Show 3x inflation network traffic on the web-console when sustain 1000 MB/sec NFS I/O in the pod.

1 OCP node using 2 different IP range, 192.168.0.192/26 is provided for OCP manager, 172.168.0.192/26 is provider for NFS storage and the network interface have configured bond0. 

2 Create PVC and use NFS as backend storage, Then reated pod and mount NFS to /data directory.
# cat debug.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: debug-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 200Gi  
  storageClassName: "nfs-client" 
---
apiVersion: v1
kind: Pod
metadata:
  name: troubleshooting-pvc-pod
spec:
  nodeSelector:
    kubernetes.io/hostname: ocp-tnkfb-worker-0
  securityContext:
    runAsNonRoot: true
    seccompProfile:
      type: RuntimeDefault
  containers:
  - name: tool-container
    image: quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:651732e89586140ee9fd7ca8772e0adbf9606fff461759235dbbd42af5636eae
    imagePullPolicy: IfNotPresent
    command: [ "sleep", "3600" ]
    securityContext:
      allowPrivilegeEscalation: false
    volumeMounts:
    - name: storage-volume
      mountPath: /data  
  volumes:
  - name: storage-volume
    persistentVolumeClaim:
      claimName: debug-pvc

3 Run command in the /data directory on the pod
dd if=/dev/zero of=test_direct.txt oflag=direct bs=1M count=100000 status=progress 2>&1 | tr '\r' '\n'

4 Check the network traffic on the web console.

https://files.slack.com/files-tmb/T030G10V24F-F0ABZNL0ATA-f814467d76/image_720.png

    1. Run the command in the NFS dir on the pods.
dd if=/dev/zero bs=100M | pv -ftrabW -L1000M 2> progress.txt | dd of=sandbag.txt bs=100M

Show 3x inflation network traffic on the web-console when sustain 1000 MB/sec  NFS I/O

Show normal network traffic on the web-console when sustain 1000 MB/sec  NFS I/O