`wg-quick` and `wg`
In order to simplify the scripts deployed on Wireguard VPN Server, I planned to
add the Address field in the VPN server configuration in OpenWISP Controller.
Making this change in the server configuration made me struggle a little in the beginning. I started debugging from the wrong place. I looked into “Preview Configuration View” while my answers were hidden in “Download Configuration View”. Though these two views mostly share the same code, the “Preview Configuration View” works with a temporary instance, i.e. automatically generated attributes are not available to it.
After successfully modifying OpenWISP Controller and NetJSONConfig, I started testing these changes by spinning up an instance on AWS.
The updater script on the VPN server used wg-quick for creating a new
interface and wg syncconf for hot-loading configuration of an existing
interface.
Little did I know the configuration formats for wg-quick and wg are
different. wg-quick allows providing additional properties that are used
for making changes using the ip command. It was only clear to me after
reading manpages for wg-quick(8)
and wg(8).
Luckily, the manpage of wg-quick(8) contains an example that allows passing
wg-quick configuration to wg syncconf.
wg syncconf wgnet0 <(wg-quick strip wgnet0)