Specifications

This happens when the virt-manager application fails to launch. This error occurs when there is
no localhost entry in the /etc/hosts configuration file. Check the file and verify if the localhost
entry is enabled. Here is an example of an incorrect localhost entry:
# Do not remove the following line, or various programs
# that require network functionality will fail.
localhost.localdomain localhost
Here is an example of a correct localhost entry:
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
localhost.localdomain. localhost
You receive the following error (in the xen-xend.log file ):
Bridge xenbr1 does not exist!
This happens when the guest's bridge is incorrectly configured and this forces the Xen hotplug
scipts to timeout. If you move configuration files between hosts, you must ensure that you
update the guest configuration files to reflect network topology and configuration modifications.
When you attempt to start a guest that has an incorrect or non-existent Xen bridge
configuration, you will receive the following errors:
[root@trumble virt]# xm create r5b2-mySQL01
Using config file " r5b2-mySQL01"
Going to boot Red Hat Enterprise Linux Server (2.6.18.-1.2747 .el5xen)
kernel: /vmlinuz-2.6.18-12747.el5xen
initrd: /initrd-2.6.18-1.2747.el5xen.img
Error: Device 0 (vif) could not be connected. Hotplug scripts not working.
In addition, the xend.log displays the following errors:
[2006-11-14 15:07:08 xend 3875] DEBUG (DevController:143) Waiting for
devices vif
[2006-11-14 15:07:08 xend 3875] DEBUG (DevController:149) Waiting for 0
[2006-11-14 15:07:08 xend 3875] DEBUG (DevController:464)
hotplugStatusCallback
/local/domain/0/backend/vif/2/0/hotplug-status
Chapter 18. Red Hat Virtualization Troubleshooting
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