PVC Scenario using Krkn

Sample scenario config

pvc_scenario:
  pvc_name: <pvc_name>          # Name of the target PVC.
  pod_name: <pod_name>          # Name of the pod where the PVC is mounted. It will be ignored if the pvc_name is defined.
  namespace: <namespace_name>   # Namespace where the PVC is.
  fill_percentage: 50           # Target percentage to fill up the cluster. Value must be higher than current percentage. Valid values are between 0 and 99.
  duration: 60                  # Duration in seconds for the fault.

Steps

• Get the pod name where the PVC is mounted.
• Get the volume name mounted in the container pod.
• Get the container name where the PVC is mounted.
• Get the mount path where the PVC is mounted in the pod.
• Get the PVC capacity and current used capacity.
• Calculate file size to fill the PVC to the target fill_percentage.
• Connect to the pod.
• Create a temp file kraken.tmp with random data on the mount path:
  • dd bs=1024 count=$file_size </dev/urandom > /mount_path/kraken.tmp
• Wait for the duration time.
• Remove the temp file created:
  • rm kraken.tmp