Restart openvpn connection after systemd suspend

systemd-openvpn-suspend.sh

#!/bin/sh

if [ "$(id -u)" != "0" ]; then
  echo "This script must be run as root" 1>&2
  exit 1
fi

if ! which systemctl >/dev/null; then
  echo "No systemctl found, systemd is required for this files" 1>&2
  exit 1
fi

echo "install /etc/systemd/system/openvpn-sleep.service"
mkdir -p "/etc/systemd/system/"
cat > /etc/systemd/system/openvpn-sleep.service <<EOF
[Unit]
Description=Suspend openvpn
Before=sleep.target
StopWhenUnneeded=yes

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/bin/true
ExecStop=/usr/bin/bash -c "while sleep 0.1; do ping6 -W1 -c3 2001:4860:4860::8888 || ping -W1 -c3 8.8.8.8 && break; done && pkill -USR1 openvpn"

[Install]
WantedBy=sleep.target
EOF

systemctl daemon-reload
systemctl enable openvpn-sleep.service

echo "Finished"