[CentOS] systemd environment var composed of vars

Mon Jul 6 15:31:41 UTC 2020
Leon Fauster <leonfauster at googlemail.com>

Am 06.07.20 um 17:25 schrieb Leon Fauster:
> Is it somehow possible to use composed ENV vars in a systemd unit file?
> 
> Simple example, env file has
> 
> ADDRESS=foo
> PORT=bar
> LISTEN=${ADDRESS}:${PORT}
> 
> putting ${ADDRESS}:${PORT} directly in the unit file works, $LISTEN not.
> 
> Does systemd supports such var substitution?
> 

Answering my self :-)

No, "Variable expansion is not performed inside the strings" see

man systemd.exec

--
Leon