Allow specifying the config outside of networkd folder

[purpleidea]

I'm making an automation module for dracut-sshd in https://github.com/purpleidea/mgmt/ I've found #23 which makes this a lot easier, but I think I need to go slightly further.

While it's good that we don't add the /etc/systemd/network/ directory by default, I actually don't want to add my dracut-sshd file in there at all if possible since I don't want it picked up by the normal system. Ideally it would come from /etc/dracut-sshd/ or /opt/ or somewhere else outside of /etc/. I'm not sure how I could selectively exclude it from being used on regular boot unless I find some sneaky systemd-networkd hack, however that wouldn't necessarily be a good general purpose automation solution.

I did notice:

    if [ -e /root/.ssh/dracut_authorized_keys ]; then
        authorized_keys=/root/.ssh/dracut_authorized_keys
    elif [ -e /etc/dracut-sshd/authorized_keys ]; then
        authorized_keys=/etc/dracut-sshd/authorized_keys
    else
        authorized_keys=/root/.ssh/authorized_keys
    fi
    if [ ! -r "$authorized_keys" ]; then
        dfatal "No authorized_keys for root user found!"
        return 1
    fi

I also can't seem to find a way to do install_items with a source:dest style so the file can come from elsewhere, short of patching dracut itself. It would be nice to do:

install_items_src_dest+=" /etc/dracut-sshd/20-wired.network /etc/systemd/network/20-wired.network "

I wrote a tentative untested patch with an approach. I would appreciate your suggestions, and since I'm unfamiliar with dracut modules, a hint on whether this makes sense as is. #111

Thanks,
James

[gsauthof]

I also can't seem to find a way to do install_items with a source:dest style

This is also my understanding that there isn't a way with just a dracut conf drop-in and install_items.