Bug#920861: Use same $HOSTNAME for hosts on LAN and WiFi

[Mike Gabriel <mike.gabriel@das-netzwerkteam.de>]

Hi Wolfgang,

On  Do 31 Jan 2019 13:14:07 CET, Wolfgang Schweer wrote:

> On Tue, Jan 29, 2019 at 09:28:02PM +0000, Mike Gabriel wrote:
> > This could all be avoided if the update-hostname-from-ip could be taught the
> > above (or a similar) hack.
> >
> > Is this something, we can provide via Debian Edu directly? Our alternative
> > here is to override update-hostname-from-ip with dpkg-divert here locally,
> > which I would like to avoid.
>
> If your only intention is to set the hostname once and stay unchanged
> (regardless of any possible side-effects) then the following might be a
> solution:
>
> (1) Introduce a new profile, say Dual-IP, using a patch like this one:
>
> diff --git a/etc/dhcp/dhclient-exit-hooks.d/hostname  
> b/etc/dhcp/dhclient-exit-hooks.d/hostname
> old mode 100755
> new mode 100644
> index ae6718d6..f5247407
> --- a/etc/dhcp/dhclient-exit-hooks.d/hostname
> +++ b/etc/dhcp/dhclient-exit-hooks.d/hostname
> @@ -19,7 +19,7 @@ if [ -r /etc/debian-edu/config ] ; then
> 	. /etc/debian-edu/config
>  fi
>
> -if echo "$PROFILE" | egrep -q  
> 'Main-Server|Roaming-Workstation|Standalone' ; then
> +if echo "$PROFILE" | egrep -q  
> 'Main-Server|Roaming-Workstation|Standalone|Dual-IP' ; then
> 	exit 0
> 	else
> 	    if echo "$PROFILE" | egrep -q  
> 'Workstation|LTSP-Server|Thin-Client-Server|Minimal' ; then
> diff --git a/etc/network/if-up.d/hostname b/etc/network/if-up.d/hostname
> index d6b2b34e..34bc5192 100755
> --- a/etc/network/if-up.d/hostname
> +++ b/etc/network/if-up.d/hostname
> @@ -19,7 +19,7 @@ if [ -r /etc/debian-edu/config ] ; then
> 	. /etc/debian-edu/config
>  fi
>
> -if echo "$PROFILE" | egrep -q  
> 'Main-Server|Roaming-Workstation|Standalone' ; then
> +if echo "$PROFILE" | egrep -q  
> 'Main-Server|Roaming-Workstation|Standalone|Dual-IP' ; then
> 	exit 0
> 	else
> 	    if echo "$PROFILE" | egrep -q  
> 'Workstation|LTSP-Server|Thin-Client-Server|Minimal' ; then
>
> IMO this patch wouldn't mess up anything else, but please check.
>
>
> (2) Configure the workstation:
>
> hostname <wanted name>
> hostname > /etc/hostname
> sed -i 's#Workstation#Workstation, Dual-IP#' /etc/debian-edu/config
>
> Wolfgang

How about "Wireless-Workstation"? Plus, don't we have to introduce  
that profile name at various other places (NOTE: I am not talking  
about the installer, this profile name change should happen at  
post-install by some admin)?

I am willing to work on that, I just want to make sure, others are on  
board with such a change.

We could also address this like mailservers handle mail account tag  
delimiters:

  Workstation
  Workstation+Dual-IP
  Workstation+SmartBoard
  Workstation+[<feature1>|<feature2>|...]

Mike

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