Disk pressure on Rancher 2.3.3 - nginx-ingress-controller

We have setup a Rancher cluster (on prem) as below
1 VM for Rancher server
1 VM for etcd
1 VM for control plane
2 VM for worker nodes
The specifications of each machines are

  • CPU : 4
  • RAM: 4 GB
  • Disk space 100 GB

Apart from the default and system pods that is created with the cluster setup, I am having 1 app with 2 pods running. The pod just echoes the host name.

After running around 100 request, I am noticing disk pressure on one of the worker nodes. Specifically the disk-pressure is reported by the nginx-ingress-controller.

my disks are around 90% empty