Re: Naming of network devices - how to improve it in buster
On Sun, Jul 16, 2017 at 01:54:27PM +0200, Guus Sliepen wrote:
> On Sat, Jul 15, 2017 at 10:25:22PM -0300, Henrique de Moraes Holschuh wrote:
> > It is indeed Very Cool, but it might not solve one little thing:
> > iptables firewalling.
> >
> > Is that a way to trigger an ifrename using this, so that the network
> > device ends up being named "foo" ?
>
> That's indeed an interesting issue. Currently, ifupdown doesn't rename
> interfaces. You could add a line like:
>
> post-up ip link set $IFACE name $LOGICAL
>
> Which will do what you want, except ifupdown doesn't track interface
> renames this way and will get very confused. In particular, ifdown will
> not work anymore. So some code should be added to ifupdown to support
> interface renaming.
This is what I assumed your new code does -- it seemed an obvious and
natural thing to do.
As Ben noticed, the post-up stanza above can't work as Linux doesn't allow
renaming interfaces at that point. It can't work in pre-up either as
ifupdown wouldn't know about the rename.
Thus, what about this:
auto mac/00:16:0a:26:99:c6/=en0
iface en0 inet6 static
address 3:1415:9265:3589:7932:3846:2643:3832/64
gateway 3:1415:9265:3589::1
rename
With the rename command taking an optional argument (the new name) that
defaults to the logical name (ie, after =).
Meow!
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