[PATCH] systemd-conf: Prevent systemd-network from managing veth interfaces

[PATCH] systemd-conf: Prevent systemd-network from managing veth interfaces

[Ross Burton]

From: Matt Spencer <matt.spencer@arm.com>

We need to prevent systemd-network from managing veth interface when
using platforms like k3s as they control creation and management of the
interfaces.

Signed-off-by: Matt Spencer <matt.spencer@arm.com>
Signed-off-by: Ross Burton <ross.burton@arm.com>
---
 meta/recipes-core/systemd/systemd-conf/wired.network | 1 +
 1 file changed, 1 insertion(+)

diff --git a/meta/recipes-core/systemd/systemd-conf/wired.network b/meta/recipes-core/systemd/systemd-conf/wired.network
index e7b69970d6..7406287248 100644
--- a/meta/recipes-core/systemd/systemd-conf/wired.network
+++ b/meta/recipes-core/systemd/systemd-conf/wired.network
@@ -1,5 +1,6 @@
 [Match]
 Type=ether
+Name=!veth*
 KernelCommandLine=!nfsroot
 KernelCommandLine=!ip
 
-- 
2.25.1

Re: [OE-core] [PATCH] systemd-conf: Prevent systemd-network from managing veth interfaces

[Bruce Ashfield]

On Tue, Jun 15, 2021 at 6:02 AM Ross Burton <ross@burtonini.com> wrote:
>
> From: Matt Spencer <matt.spencer@arm.com>
>
> We need to prevent systemd-network from managing veth interface when
> using platforms like k3s as they control creation and management of the
> interfaces.

FWIW, I think this may surprise/break people in other use cases. I had
mentioned this to matt directly as well.

The situation is not as clear as that commit message implies. networkd
*can* cause issues with veth devices, but not always.

Not trying to stop the patch, but I wanted my concerns to be archived :D

Bruce

>
> Signed-off-by: Matt Spencer <matt.spencer@arm.com>
> Signed-off-by: Ross Burton <ross.burton@arm.com>
> ---
>  meta/recipes-core/systemd/systemd-conf/wired.network | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/meta/recipes-core/systemd/systemd-conf/wired.network b/meta/recipes-core/systemd/systemd-conf/wired.network
> index e7b69970d6..7406287248 100644
> --- a/meta/recipes-core/systemd/systemd-conf/wired.network
> +++ b/meta/recipes-core/systemd/systemd-conf/wired.network
> @@ -1,5 +1,6 @@
>  [Match]
>  Type=ether
> +Name=!veth*
>  KernelCommandLine=!nfsroot
>  KernelCommandLine=!ip
>
> --
> 2.25.1
>
>
> 
>


-- 
- Thou shalt not follow the NULL pointer, for chaos and madness await
thee at its end
- "Use the force Harry" - Gandalf, Star Trek II

Re: [OE-core] [PATCH] systemd-conf: Prevent systemd-network from managing veth interfaces

[Scott Murray]

On Tue, 15 Jun 2021, Bruce Ashfield wrote:

> On Tue, Jun 15, 2021 at 6:02 AM Ross Burton <ross@burtonini.com> wrote:
> >
> > From: Matt Spencer <matt.spencer@arm.com>
> >
> > We need to prevent systemd-network from managing veth interface when
> > using platforms like k3s as they control creation and management of the
> > interfaces.
>
> FWIW, I think this may surprise/break people in other use cases. I had
> mentioned this to matt directly as well.
>
> The situation is not as clear as that commit message implies. networkd
> *can* cause issues with veth devices, but not always.
>
> Not trying to stop the patch, but I wanted my concerns to be archived :D

I second this concern, a default config change like this might bite
systemd-nspawn users, as it has its own options to set up private
networking with veth interfaces.  Maybe adding a drop-in conf file
to do this when k3s or the like is installed would be better?

Scott

> >
> > Signed-off-by: Matt Spencer <matt.spencer@arm.com>
> > Signed-off-by: Ross Burton <ross.burton@arm.com>
> > ---
> >  meta/recipes-core/systemd/systemd-conf/wired.network | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/meta/recipes-core/systemd/systemd-conf/wired.network b/meta/recipes-core/systemd/systemd-conf/wired.network
> > index e7b69970d6..7406287248 100644
> > --- a/meta/recipes-core/systemd/systemd-conf/wired.network
> > +++ b/meta/recipes-core/systemd/systemd-conf/wired.network
> > @@ -1,5 +1,6 @@
> >  [Match]
> >  Type=ether
> > +Name=!veth*
> >  KernelCommandLine=!nfsroot
> >  KernelCommandLine=!ip
> >
> > --
> > 2.25.1
> >
> >
> >
> >
>
>
>

Re: [OE-core] [PATCH] systemd-conf: Prevent systemd-network from managing veth interfaces

[Khem Raj]

On 6/15/21 3:02 AM, Ross Burton wrote:
> From: Matt Spencer <matt.spencer@arm.com>
> 
> We need to prevent systemd-network from managing veth interface when
> using platforms like k3s as they control creation and management of the
> interfaces.

perhaps it may be an option to override wired.network or  use a fragment 
to drop-in just this change via own layer

> 
> Signed-off-by: Matt Spencer <matt.spencer@arm.com>
> Signed-off-by: Ross Burton <ross.burton@arm.com>
> ---
>   meta/recipes-core/systemd/systemd-conf/wired.network | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/meta/recipes-core/systemd/systemd-conf/wired.network b/meta/recipes-core/systemd/systemd-conf/wired.network
> index e7b69970d6..7406287248 100644
> --- a/meta/recipes-core/systemd/systemd-conf/wired.network
> +++ b/meta/recipes-core/systemd/systemd-conf/wired.network
> @@ -1,5 +1,6 @@
>   [Match]
>   Type=ether
> +Name=!veth*
>   KernelCommandLine=!nfsroot
>   KernelCommandLine=!ip
>   
> 
> 
> 
> 
>