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Re: [patch 2/6] [Network namespace] Network device sharing by view [message #4088 is a reply to message #4067]

Wed, 28 June 2006 13:36

Herbert Poetzl
Messages: 239
Registered: February 2006

Senior Member

On Tue, Jun 27, 2006 at 09:38:14PM -0600, Eric W. Biederman wrote:
> Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> writes:
>
> > Hello!
> >
> >> It may look weird, but do application really *need* to see eth0 rather
> >> than eth858354?
> >
> > Applications do not care, humans do. :-)
> >
> > What's about applications they just need to see exactly the same
> > device after migration. Not only name, but f.e. also its ifindex.
> > If you do not create a separate namespace for netdevices, you will
> > inevitably end up with some strange hack sort of VPIDs to translate
> > (or to partition) ifindices or to tell that "ping -I eth858354 xxx"
> > is too coimplicated application to survive migration.
>
>
> Actually there are applications with peculiar licensing practices that
> do look at devices like eth0 to verify you have the appropriate mac, and
> do really weird things if you don't have an eth0.
>
> Plus there are other cases where it can be simpler to hard code things
> if it is allowable. (The human factor) Otherwise your configuration
> must be done through hotplug scripts.
>
> But yes there are misguided applications that care.

last time I pointed to such 'misguided' apps which
made assumptions that are not necessarily true
inside a virtual environment (e.g. pstree, initpid)
the general? position was that those apps should
be fixed instead adding a 'workaround'

note: personally I'm absolutely not against virtualizing
the device names so that each guest can have a separate
name space for devices, but there should be a way to
'see' _and_ 'identify' the interfaces from outside
(i.e. host or spectator context)

best,
Herbert

> Eric

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[Message index]

		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Andrey Savochkin on Tue, 27 June 2006 09:38
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Daniel Lezcano on Tue, 27 June 2006 11:21
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: ebiederm on Tue, 27 June 2006 11:52
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Herbert Poetzl on Tue, 27 June 2006 16:02
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: ebiederm on Tue, 27 June 2006 16:47
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Ben Greear on Tue, 27 June 2006 17:19
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Herbert Poetzl on Tue, 27 June 2006 22:52
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Dave Hansen on Tue, 27 June 2006 23:12
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Alexey Kuznetsov on Tue, 27 June 2006 23:42
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: ebiederm on Wed, 28 June 2006 03:38
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Herbert Poetzl on Wed, 28 June 2006 13:36
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: ebiederm on Wed, 28 June 2006 14:21
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: jamal on Wed, 28 June 2006 13:53
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Sam Vilain on Thu, 29 June 2006 21:07
		strict isolation of net interfaces By: Cedric Le Goater on Thu, 29 June 2006 22:14
		Re: strict isolation of net interfaces By: Sam Vilain on Fri, 30 June 2006 02:48
		Re: strict isolation of net interfaces By: Andrey Savochkin on Mon, 03 July 2006 14:53
		Re: strict isolation of net interfaces By: Sam Vilain on Tue, 04 July 2006 03:00
		Re: strict isolation of net interfaces By: Daniel Lezcano on Tue, 04 July 2006 12:29
		Re: strict isolation of net interfaces By: serue on Fri, 30 June 2006 02:39
		Re: strict isolation of net interfaces By: Cedric Le Goater on Fri, 30 June 2006 08:56
		Re: strict isolation of net interfaces By: Herbert Poetzl on Mon, 03 July 2006 13:36
		Re: strict isolation of net interfaces By: Daniel Lezcano on Fri, 30 June 2006 12:23
		Re: strict isolation of net interfaces By: ebiederm on Fri, 30 June 2006 14:20
		Re: strict isolation of net interfaces By: Daniel Lezcano on Fri, 30 June 2006 15:22
		Re: strict isolation of net interfaces By: ebiederm on Fri, 30 June 2006 17:58
		Re: strict isolation of net interfaces By: serue on Fri, 30 June 2006 16:14
		Re: strict isolation of net interfaces By: ebiederm on Fri, 30 June 2006 17:41
		Re: strict isolation of net interfaces By: ebiederm on Fri, 30 June 2006 18:09
		Re: strict isolation of net interfaces By: Sam Vilain on Tue, 04 July 2006 13:13
		Re: strict isolation of net interfaces By: Daniel Lezcano on Tue, 04 July 2006 13:19
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: jamal on Fri, 30 June 2006 00:15
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Herbert Poetzl on Fri, 30 June 2006 03:35
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Andrey Savochkin on Fri, 30 June 2006 07:45
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: jamal on Fri, 30 June 2006 13:50
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Andrey Savochkin on Fri, 30 June 2006 15:01
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: ebiederm on Fri, 30 June 2006 18:22
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: jamal on Fri, 30 June 2006 21:51
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: ebiederm on Sat, 01 July 2006 00:50
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: ebiederm on Wed, 28 June 2006 14:51
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Alexey Kuznetsov on Tue, 27 June 2006 16:49
		Re: [patch 2/6] [Network namespace] Network device sharing by view By: Andrey Savochkin on Tue, 27 June 2006 11:55

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