On 05/26/2011 03:40 PM, [email protected] wrote:
Hello!
I have installed KVM/QEMU on my LMDE (Linux Mint Debian Edition) system.
On this webpage I found some instructions howto setup the network:
http://www.linux-kvm.org/page/Networking
My first question is:
For a public bridge, should I configure /etc/network/interfaces in order to
create the bridge static.
Or should I use a script to create a bridge dynamically when the virtual
machine starts.
I doubt there's a correct answer. I create the bridges I use statically
at boot time and create bridge taps on demand when I launch VMs
(probably because I always found the VMWare bridges appealing). If you
want to have physical network access for VMs or a stable routing
environment for them at launch or host services like dhcpd/pxe/etc to
support them then I recommend static bridges that you consider part of
the host environment.
Second question:
I made some tests with this script that is shown in section
public bridge -> Solution 2: manual:
#!/bin/sh
set -x
switch=br0
if [ -n "$1" ];then
/usr/bin/sudo /usr/sbin/tunctl -u `whoami` -t $1
/usr/bin/sudo /sbin/ip link set $1 up
sleep 0.5s
/usr/bin/sudo /usr/sbin/brctl addif $switch $1
exit 0
else
echo "Error: no interface specified"
exit 1
fi
When I debug this script I can see that it always ends up in "Error: no interface
specified":
bash -x /usr/local/bin/networkbridge_setup.sh
+ set -x
+ switch=br0
+ '[' -n '' ']'
+ echo 'Error: no interface specified'
Error: no interface specified
+ exit 1
Why is that?
It looks like $1 must be empty because the script was run with no
command line arguments/parameters.
--
David.
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