periodic command/script (cron?) for port forwarding?

[dolhop]

Using the VPN_PORT_FORWARDING_UP_COMMAND is great, for which I would run a curl command to set the port in a different container/client. However, if that container is down, there is no subsequent opportunity to set the port.

I can have the VPN_PORT_FORWARDING_UP_COMMAND run a script that runs a loop until it succeeds, but would this block gluetun in any way? Or, if gluetun runs VPN_PORT_FORWARDING_UP_COMMAND then VPN_PORT_FORWARDING_DOWN_COMMAND, then VPN_PORT_FORWARDING_UP_COMMAND again, what happens? parallel instances with potentially stale port values?

Is there a way to institute a command/script that can run periodically (user configurable) that could attempt to run a command (to set the port using the value from the port_forward file gluetun creates)? Possibly using crontab?