Helper script to create number of persistent volumes for openshift

create-persisten-volumes.sh

#!/bin/bash
# Helper to create persistent volumes.

set -o errexit
set -o nounset
set -o pipefail

# The first argument to this script sets the number of persistent volumes to be
# created, default 1.
readonly N=${1:-1}

# Set PV_SIZE to customize the persistent volume size.
readonly PV_SIZE=${PV_SIZE:-50Gi}

# Hint: set TMPDIR to set a custom path for the persistent volume, default /tmp.

# create_pv creates a new persistent volume backed by a temporary directory.
function create_pv() {
  local name
  name="pv-$(date +'%s')-$(tr -dc '[:lower:][:digit:]' </dev/urandom | dd bs=4 count=1 2>/dev/null || :)"
  local path
  path="$(mktemp -d --tmpdir pv.XXXXX | tee >(xargs chmod a+rwx))"

  oc create -f - <<EOF
  {
    "kind": "PersistentVolume",
    "apiVersion": "v1",
    "metadata": {
      "name": "${name}"
    },
    "spec": {
      "capacity": {
        "storage": "${PV_SIZE}"
      },
      "hostPath": {
        "path": "${path}"
      },
      "accessModes": [
        "ReadWriteOnce"
      ]
    }
  }
EOF
}

# Create persistent volumes.
for ((n=0;n<${N};n++)); do
  create_pv
done