VGPU mediated device persistence

start-defined-vgpus.service

[Unit]
Description=Start defined mediated devices
Requires=nvidia-vgpu-mgr.service
Requires=nvidia-vgpud.service
After=nvidia-vgpu-mgr.service
After=nvidia-vgpud.service

[Service]
Type=oneshot
ExecStart=/usr/local/bin/start-defined-vgpus.sh

[Install]
WantedBy=multi-user.target

start-defined-vgpus.sh

#!/bin/bash

while true; do
  devices=$(/usr/local/bin/mdevctl list -d | grep -v '\(active\)' | awk '{ printf "%s ",$1 }')
  if [ -z "$devices" ]; then
    echo "No unstarted mediated devices found."
    exit 0
  fi
  num=$(echo "$devices" | wc -w)
  echo "Attempting to start $num mediated devices"
  for device in $devices; do
    /usr/local/bin/mdevctl start --uuid $device
    if [ $? -ne 0 ]; then
      echo "Failed to start device $device, will retry in 10 seconds."                        
      sleep 10
      continue 2
    else
      echo "Successfully started device $device"
    fi
  done
  echo "Successfully started $num devices."
  exit 0
done