After adding the new ifaces through virt-manager, the VM started regulary and created a new network script for eth2 (/etc/sysconfig/network-scripts/ifcfg-eth2). I think that the problem was this - when the VM is restarted it tried to bring up eth2 while vif-script tried to propagate second bridge via eth1 iface. I resolved this simply by replacing ifcfg-eth2 script with ifcfg-eth1. Now, VM starts/restarts regulary ;)
So, the process for creating and configuring new bridges that I follow is (tried on multiple servers):
- create new script that sets up multiple bridges in /etc/xen/scripts/
example: network-xen-multi-bridge
#!/bin/sh
# network-xen-multi-bridge
# Exit if anything goes wrong.
set -e
# First arg is the operation.
OP=$1
shift
script=/etc/xen/scripts/network-bridge.xen
case ${OP} in
start)
$script start vifnum=3 bridge=xenbr3 netdev=eth3
$script start vifnum=0 bridge=xenbr0 netdev=eth0
;;
stop)
$script stop vifnum=3 bridge=xenbr3 netdev=eth3
$script stop vifnum=0 bridge=xenbr0 netdev=eth0
;;
status)
$script status vifnum=3 bridge=xenbr3 netdev=eth3
$script status vifnum=0 bridge=xenbr0 netdev=eth0
;;
*)
echo 'Unknown command: ' ${OP}
echo 'Valid commands are: start, stop, status'
exit 1
esac
- make it executable (chmod 755 network-xen-multi-bridge)
- configure /etc/xen/xend-config.sxp (comment out the current script and add the new one);
# It is possible to use the network-bridge script in more complicated
# scenarios, such as having two outgoing interfaces, with two bridges, and
# two fake interfaces per guest domain. To do things like this, write
# yourself a wrapper script, and call network-bridge from it, as appropriate.
#
#(network-script network-bridge)
(network-script network-xen-multi-bridge)
- restart physical server so the bridges are properly created
- add virt. ifaces to the VM's (via virt-manager or via config. files in /etc/xen/ ..)
- boot VM
- configure newly added iface in /etc/sysconfig/network-scripts/
- restart VM
Additionaly I check everything by restarting phys. server to make sure that everything is ok ;)
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