[hfreyther: We assume that the user might install OpenVPN with
a different priority but that it will always be available in the
runlevel two (e.g. even if the user changed the default runlevel)]
Related: SYS#517
I have no idea who creates the /run/openvpn directory on Debian.
The path is not in a tmpfiles.d and I don't see the generator
creating it or the service file indicating that it needs to be
created. Place the file with openvpn.NAME.status into the /run
directory which appears to work on the device.
We want to use systemd for managing the lifetime of OpenVPN. Take
the debian generator (which should work with busybox ash) and the
openvpn.service (to inhibit the sysvinit script) and the target
file and install it.
On systems that have ran "update-rc.d openvpn defaults" one need
to manually execute a systemctl enable openvpn.service. This is
not done through a post-inst script and I am not sure if we should
do it. This means there is a danger of ending with a unit that
doesn't start OpenVPN automatically after upgrade!
The scripts/packages have not been tested on a device yet.
We should use a more recent version of the OpenVPN client. Import
it from the meta-networking layer like we did before. The sysvinit
script has just minor whitespace differences and wasn't imported.
We need to test opkg upgrades of OpenVPN through the VPN. We don't
want to kill the tunnel on such upgrade.