balena-supervisor/tools/dind/vpn-init

#!/bin/bash
source /usr/src/app/resin-vars
sed --expression="s/#{VPN_ENDPOINT}/${VPN_ENDPOINT}/" /etc/openvpn/client.conf.tmpl > /etc/openvpn/client.conf

while true; do
	if [ `jq ".uuid | length" $CONFIG_PATH` -eq 0 ]; then
		echo "UUID missing from config file, VPN cannot connect"
		sleep 2
	else
		read uuid api_key <<<$(jq -r '.uuid,.apiKey // .deviceApiKey' $CONFIG_PATH)
		mkdir -p /var/volatile/
		echo $uuid > /var/volatile/vpnfile
		echo $api_key >> /var/volatile/vpnfile
		break
	fi
done