 multiple veth Network configuration with vlan and bridge [message #24978] |
Wed, 12 December 2007 17:16  |
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Hi all,
I've post this on the user mailing list as well, but I think it should be better here, if not, you can delete this message.
I'm currently working on a xen to openvz migration and some I have problem to setup the network configuration.
I'm using the lastest kernel patch build to support nfsroot for the openvz host under ubuntu dapper 6.06 LTS
I will have at least 12 vlan on the OVZ host, and 2 or 3 vlan in each VE
for example, NETIF for the VEID 101
NETIF="ifname=eth1.10,mac=00:16:3E:00:00:1E,host_ifname=veth101.10,host_mac=00:E0:81:4B:2F:DB;ifname=eth1.19,mac=00:16:3E:00:00:1E,host_ifname=veth101&.19,host_mac=00:E0:81:4B:2F:DB"
and I want an EXTERNAL_SCRIPT that check if the bridge exist, and if not create and add the interface
my first idea was adding a new variable that indicate all the vlan we have to configure :
VETH_BRIDGE="brvlan10 brvlan19"
with this script :
#!/bin/bash
# /usr/sbin/vznetaddroute
# a script to bring up virtual network interfaces (veth's) in a VE
CONFIGFILE=/etc/vz/conf/$VEID.conf
. $CONFIGFILE
VZHOSTIF=`echo $NETIF |sed 's/^.*host_ifname=\(.*\)\..*,.*$/\1/g'`
for BRIDGE in ${VETH_BRIDGE} ; do
VLAN=`echo ${BRIDGE} | sed 's/brvlan//'`
if [ ! -n "${VZHOSTIF}.${VLAN}" ]; then
echo "According to $CONFIGFILE VE$VEID has no veth interface configured."
exit 1
fi
if [ ! -n "${BRIDGE}" ]; then
echo "According to $CONFIGFILE VE$VEID has no veth bridge configured."
exit 1
fi
echo "Adding interface ${VZHOSTIF}.${VLAN} to bridge ${BRIDGE} on VE0"
if [ -z "`/usr/sbin/brctl show | /bin/grep ${BRIDGE}`" ]; then
/usr/sbin/brctl addbr ${BRIDGE}
/usr/sbin/brctl addif ${BRIDGE} eth1.${VLAN}
/sbin/ip link set ${BRIDGE} up
fi
/usr/sbin/brctl addif ${BRIDGE} ${VZHOSTIF}.${VLAN}
/sbin/ip link set ${VZHOSTIF}.${VLAN} up
done
exit 0
When I start my VE, I have :
# vzctl start 101
Starting VE ...
VE is mounted
Setting CPU limit: 241132
Setting CPU units: 55555
Configure meminfo: 502650
Set hostname: adviseo03
Configure veth devices: veth101.10 veth101.19
Adding interface veth101.10 to bridge brvlan10 on VE0
Adding interface veth101.19 to bridge brvlan19 on VE0
interface veth101.19 does not exist!
SIOCGIFFLAGS: No such device
Adding interface veth101.10 to bridge brvlan10 on VE0
device veth101.10 is already a member of a bridge; can't enslave it to bridge brvlan10.
Adding interface veth101.19 to bridge brvlan19 on VE0
VE start in progress...
so at start vzctl already know we will have 2 net device : "Configure veth devices: veth101.10 veth101.19"
so the EXTERNAL_SCRIPT is execute 2 times, one time for each veth, so I shouldn't need to setup VETH_BRIDGE if in the EXTERNAL_SCRIPT, I'm able to know with veth is currently configured
It's not easy to explain until it is still quite complicated for me
so the question is :
is it possible to know in the EXTERNAL_SCRIPT, for which interface, the script is execute ?
thanks for your help
Yoann
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| Re: multiple veth Network configuration with vlan and bridge [message #24983 is a reply to message #24978] |
Wed, 12 December 2007 17:56  |
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| mistur wrote on Wed, 12 December 2007 18:16 |
is it possible to know in the EXTERNAL_SCRIPT, for which interface, the script is execute ?
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Well, I gave a look to the source code and got my answer ($3)... it's working perfectly.
NETIF still the same :
NETIF="ifname=eth1.10,mac=00:16:3E:00:00:1E,host_ifname=veth10.10,host_mac=00:E0:81:4B:2F:DB;ifname=eth1.19,mac=00:16:3E:00:00:1E,host_ifname=veth10.19,host_mac=00:E0:81:4B:2F:DB"
and the script begin :
#!/bin/bash
# /usr/sbin/vznetaddroute
# a script to bring up virtual network interfaces (veth's) in a VE
CONFIGFILE=/etc/vz/conf/$VEID.conf
. $CONFIGFILE
VETH=$3
VZHOSTIF=`echo ${VETH} | cut -f1 -d"."`
VLAN=`echo ${VETH} | cut -f2 -d"."`
VETH_BRIDGE=brvlan${VLAN}
if [ ! -n "${VZHOSTIF}.${VLAN}" ]; then
echo "According to $CONFIGFILE VE$VEID has no veth interface configured."
exit 1
fi
if [ ! -n "${VETH_BRIDGE}" ]; then
echo "According to $CONFIGFILE VE$VEID has no veth VETH_BRIDGE configured."
exit 1
fi
echo "Adding interface ${VZHOSTIF}.${VLAN} to VETH_BRIDGE ${VETH_BRIDGE} on VE0"
if [ -z "`/usr/sbin/brctl show | /bin/grep ${VETH_BRIDGE}`" ]; then
/usr/sbin/brctl addbr ${VETH_BRIDGE}
/usr/sbin/brctl addif ${VETH_BRIDGE} eth1.${VLAN}
/sbin/ip link set ${VETH_BRIDGE} up
fi
/usr/sbin/brctl addif ${VETH_BRIDGE} ${VZHOSTIF}.${VLAN}
/sbin/ip link set ${VZHOSTIF}.${VLAN} up
exit 0
---- END SCRIPT ----
sorry for the noise
Yoann
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